Elevator position detection system and elevator position detection method

Abstract

The invention provides a position detection system and a position detection method of an elevator, which can easily set a door area and ensure the position detection precision of an elevator car. The position detection system of the elevator comprises: a first position detector (8) for detecting the movement amount of a car (20); and a control device (2) that detects the position of the car on the basis of the 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 area of each floor, and determines whether the detected position of the car is within the stored range of the door area.

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 an elevator shaft. Background Art

[0002] The elevator is equipped with a position detection system for detecting the position of a car in the elevator shaft. Based on the position of the car detected by the position detection system, the operation of the car is controlled.

[0003] As a conventional technology related to a position detection system for an elevator, the technology described in Patent Document 1 is known.

[0004] In the door-open travel protection device described in Patent Document 1, when the car is traveling with its door open and at a speed exceeding a threshold value preset according to the distance from the stop reference position within a predetermined distance from the stop reference position, the car stops urgently.

[0005] The distance between the parking reference position and the car is calculated based on the amount of car movement and the floor reference position. The amount of car movement is detected based on the pulse signal output by the rotary encoder installed on the governor pulley. The floor reference position is detected by a detection plate installed on the threshold of the landing station and setting the door area and a position sensor installed on the car.

[0006] When the position sensor detects the edge of the detection plate, the car is at the floor reference position. The detection plate is installed on the threshold of the landing station so that the distance between the edge position and the parking reference position becomes a specified value.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: International Publication No. 2011 / 158301 Summary of the invention

[0010] Technical problem to be solved by the invention

[0011] In the above-mentioned prior art, since the installation position of the detected plate affects the detection accuracy of the car position, the detected plate needs to be installed and adjusted in high accuracy on each floor, which makes the setting of the door area complicated.

[0012] Therefore, the present invention provides an elevator position detection system and a position detection method, which can easily set the door area and ensure the position detection accuracy of the car.

[0013] Technical means for solving technical problems

[0014] In order to solve the above problems, the position detection system of the elevator of the present invention comprises: a first position detector, which detects the movement amount of the car; and a control device, which detects the position of the car based on the accumulated value of the movement amount of the car detected by the first position detector. The control device stores the range of the door area of ​​each floor and determines whether the detected position of the car is within the range of the stored door area.

[0015] In order to solve the above technical problems, the elevator position detection method of the present invention is a method for detecting the position of the car based on the cumulative value of the movement amount of the car. In this method, the range of the door area of ​​each floor is calculated in advance based on the position of the car when the car stops at each floor, the offset between the floor of the car and the floor of the landing of each floor, and the specified width of the door area. It is also determined whether the detected position of the car is within the range of the pre-calculated door area.

[0016] Effects of the Invention

[0017] According to the present invention, the door area can be easily set while ensuring the accuracy of detecting the position of the car.

[0018] Problems, structures, and effects other than those described above will become more apparent from the following description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a diagram showing the overall structure of an elevator as one embodiment.

[0020] Figure 2 The output pattern of the position detection sensor 27 in the embodiment is shown.

[0021] Figure 3 1 is a functional block diagram showing the configuration of the safety control device 2 in the embodiment.

[0022] Figure 4 The reference position storage processing unit 64 ( Figure 3 )'s action flow chart.

[0023] Figure 5 An example of the reference position table 63 is shown.

[0024] Figure 6 The door area position generating unit 65 ( Figure 3 )'s action flow chart.

[0025] Figure 7 An example of the door area position table 68 is shown.

[0026] Figure 8 The fault detection unit 66 ( Figure 3 )'s action flow chart. DETAILED DESCRIPTION

[0027] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0028] In addition, in the following description, the position or position information of the car represents the height from the reference position in the elevator shaft (in the present embodiment, the floor of the floor station of the reference layer (lowest layer)) to the reference position of the car (in the present embodiment, the floor of the car). That is, the position or position information of the car represents the absolute position in the elevator shaft.

[0029] Figure 1 It is a diagram showing the overall structure of an elevator which is one embodiment of the present invention.

[0030] The car 20 is connected to the counterweight 22 via the main rope 21 in the elevator shaft. The main rope 21 is wound around the pulley of the traction machine. When the power converter of the elevator control device 3 supplies power to the motor 9 of the traction machine, the sheave is rotated by the motor 9. When the main rope 21 is driven by the rotating pulley, the car 20 moves between multiple floors in the elevator shaft. In addition, a buffer 30 is provided on the bottom of the elevator shaft, that is, on the pit, and the buffer 30 supports the car 20 when the car 20 descends over the terminal floor.

[0031] An encoder as a pulse generator is mounted on the motor 9. The encoder counts pulses generated by the elevator control device 3 corresponding to the rotation of the motor 9. The elevator control device 3 calculates the speed of the motor 9, the position of the car 20 in the moving direction, the displacement of the relative position of the car 20, that is, the movement amount, etc. by counting the pulses. Based on the calculation, the elevator control device 3 controls the operation of the car 20 by controlling the motor 9. In the parking control of the car 20, the elevator control device 3 aligns the car floor with the landing floor.

[0032] The car 20 is provided with a car side door and a position detection sensor 27. The car side door engages with the landing side door 23 and is opened and closed together with the landing side door 23 by a door driving device provided in the car 20. The position detection sensor 27 detects the detected plates 50 to 54 provided at the terminal floor and any place in the elevator shaft. When the detected plates 50 to 54 are detected, the elevator control device 3 determines that the car 20 has reached the position indicated by the detected plates 50 to 54. That is, the position detection sensor 27 and the detected plates 50 to 54 constitute a position detection device for discretely detecting the position of the car 20.

[0033] The detected plate 50 of the terminal layer is set at a position corresponding to the lowest layer, and the other detected plates 51 to 54 are set in the elevator shaft on the same extension as the detected plate 50. The installation positions of these detected plates 51 to 54 may not correspond to the floor positions, but may be any positions. In addition, the terminal layer is identified by the detected plate 50 by the following method.

[0034] The position detection sensor 27 is composed of two sensors (for example, photoelectric sensors) (see Figure 2 ). For the detected plate 50, both sensors respond, while for the other detected plates 51 to 54, only one sensor responds. Thus, the terminal layer is identified based on the detection signal of the position detection sensor 27. The length of the detected plates 50 to 54 may not correspond to the door area, and may be appropriately set, for example, within a range of several centimeters to several tens of centimeters.

[0035] Furthermore, if the position detection sensor 27 can detect specific discrete positions in the elevator shaft, a landing threshold, a landing door, a beam in the elevator shaft, etc. may be used as the detected object instead of the detected plate.

[0036] A speed governor rope connected to the car 20 is wound around the speed governor pulley provided in the speed governor 7. The speed governor pulley rotates as the car 20 moves. The rotation amount of the speed governor pulley is detected by the relative position detection sensor 8 provided in the speed governor 7. In this embodiment, a rotation position detection sensor is applied as the relative position detection sensor 8. The rotation position detection sensor rotates together with the speed governor pulley as the car moves.

[0037] The relative position detection sensor 8 generates a signal corresponding 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 change amount of the relative position of the car 20, that is, the movement amount, based on the output signal of the relative position detection sensor 8. The safety control device 2 detects the discrete position of the car 20 based on the output signal of the position detection sensor 27.

[0038] As the rotation position detection sensor, for example, an encoder is applied. The encoder outputs a pulse signal as the car 20 moves. The safety control device 2 detects the movement amount of the car 20 by counting the number of pulses.

[0039] The rotation position detection sensor may be provided in the car 20. In this case, the rotation position detection sensor is mounted on a rotating roller connected to the guide rail.

[0040] If the movement amount of the car 20 can be detected, other relative position detection sensors 8 may be used instead of the rotation position detection sensor. For example, an image sensor that captures the surface of the guide rail may be provided in the car 20, and the movement amount of the car 20 may be detected based on the change in the captured image. In addition, the movement amount of the car 20 may be detected by integrating twice the acceleration of the car 20 detected by the acceleration sensor provided in the car 20. In addition, the encoder installed on the motor 9 provided in the traction machine may be shared by the elevator control device 3 and the safety control device 2.

[0041] In the present embodiment, the relative position detection sensor 8 is duplicated to ensure the reliability of the rotation amount detection.

[0042] As a method of duplexing the relative position detection sensor 8 , two sensors of the same type, for example, encoders, are provided, or two sensors of different types, for example, an encoder and an acceleration sensor are provided.

[0043] The safety control device 2 is independent of the elevator control device 3 and is used to detect the position of the car 20. The safety control device 2 in this embodiment determines whether the car 20 is located in the door area, which is an area where the car side door and the landing side door 23 are engaged and can be opened and closed together, based on the position information of the car 20 obtained using the relative position detection sensor 8 and the discrete position detection device (position detection sensor 27 and detected plates 50-54). The door area is an area where the car side door and the landing side door 23 are engaged and can be opened and closed together.

[0044] The safety control device 2 performs safety processing based on the result of the determination of whether the car 20 is in the door area. For example, the safety control device 2 makes an emergency stop of the car 20 when it is determined that the car 20 is running outside the door area with any door open, based on the result of the determination, the signal of the landing door switch for detecting the opening and closing of the landing side door 23, and the signal of the car door switch for detecting the opening and closing of the car side door. That is, the safety control device 2 has an open-door running protection function. In addition, when the safety control device 2 detects the opening of any door while the car 20 is running outside the door area, the car 20 is made to stop urgently.

[0045] In addition, when the car 20 is urgently stopped, the safety control device 2 opens the contacts of the electromagnetic contactor 4 to cut off the power supply from the building power supply 10 to the elevator control device 3. As a result, the power supply from the power converter to the motor 9 is stopped, and the brake device 5 is actuated to brake the motor 9.

[0046] exist Figure 1In the embodiment shown, the safety control device 2 is arranged together with the elevator control device 3 in the control panel 14. In addition, the safety control device 2 may be arranged on the car 20 in consideration of the wiring length of the signal line between each sensor (8, 27) and the safety control device 2.

[0047] Figure 2 The output mode of the position detection sensor 27 in this embodiment is shown. In addition, the position detection sensor 27 is composed of two photoelectric sensors (A and B in the figure). In addition, in the figure, the position detection sensor 27 is recorded as "the second position detection sensor (27)" (relative to the position detection sensor 8, it is appropriately recorded as "the first position detection sensor (8)").

[0048] The position detection sensor 27 detects the detected plate 51 positioned at the terminal layer ( Figure 1 ), the optical axes of the photoelectric sensors A and B are in contact with the plate to be detected. Therefore, the photoelectric sensors A and B are both in the on state ("1" in the figure).

[0049] The other detected plates 51 to 54 are arranged at any positions, but Figure 2 In the figure, their positions are recorded as "position a" and "position b".

[0050] When the position detection sensor 27 detects the plate to be detected positioned at position a, only the optical axis of photoelectric sensor B contacts the plate to be detected among the optical axes of photoelectric sensors A and B. Therefore, photoelectric sensor A becomes off ("0" in the figure) and photoelectric sensor B becomes on.

[0051] When the position detection sensor 27 detects the detection plate positioned at position b, only the optical axis of photosensor A contacts the detection plate among the optical axes of photosensors A and B. Therefore, photosensor A turns on and photosensor B turns off.

[0052] The detected plate positioned at position a and the detected plate positioned at position b are arranged alternately in the elevator shaft, or one and the other are arranged near the odd-numbered floors and near the even-numbered floors respectively.

[0053] Figure 3 2 is a functional block diagram showing the configuration of the safety control device 2 in the present embodiment.

[0054] In this embodiment, the safety control device 2 includes a computer system such as a microcomputer. The computer system operates as each part by executing a predetermined program.

[0055] The movement amount detection unit 60 inputs the first position detection sensor (8), that is, the relative position detection sensor 8 ( Figure 1The movement amount detection unit 60 calculates the movement amount of the car 20 based on the output signal of the first position detection sensor (8) input.

[0056] The reference position detection unit 61 inputs the second position detection sensor (27), that is, the position detection sensor 27 ( Figure 1 The reference position detection unit 61 detects the output signal of the reference position based on the input output signal mode, that is, Figure 2 The output mode shown in the figure determines the current position of the car 20 and detects the various sensors ( Figure 2 The on and off states of A and B are shown.

[0057] The car position detector 62 calculates the current position information of the car 20 based on the movement amount of the car 20 calculated by the movement amount detector 60 and the current position of the car 20 detected by the reference position detector 61. The safety controller 2 outputs the current position information calculated by the car position detector 62 as a car position signal.

[0058] When calculating the current position information, the car position detection unit 62 accumulates the movement amount of the car 20 and calculates the current position of the car 20 based on the accumulated value. In addition, 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 needed, and uses the corrected value as the current position information of the car 20.

[0059] The reference position table 63 stores the corresponding association 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 accumulating the movement amount of the car 20 deviates from the position of the car 20 calculated based on the output signal of the first position detection sensor (8) in the reference position table 63, 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.

[0060] By the above correction, the accumulation of the detection error of the first position detection sensor (8), i.e., the relative position detection sensor 8, is compensated along with the accumulation of the movement amount of the car 20. For example, when an encoder mounted on a governor pulley is used as the relative position detection sensor 8, the wear of the governor pulley, the error between the slits of the encoder, the tension change of the governor rope corresponding to the temperature, etc. become error factors.

[0061] 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 generated by the reference position storage processing unit 64 when the safety control device 2 receives a table generation start signal from the elevator control device 3 or the maintenance terminal device (not shown).

[0062] The reference position storage processing unit 64 starts to operate when the input table generates a start signal. When the reference position storage processing unit 64 starts to operate, it sequentially accumulates the movement amount 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 maintains the calculated position of the car 20, and updates the maintained position of the car 20 to a new accumulated value each time the movement amount is accumulated. In addition, when the operation starts, the reference position storage processing unit 64 detects the on / off state, that is, the output mode ( Figure 2 When the reference position storage processing unit 64 detects the switching between the on state and the off state, the current position of the car 20 maintained is associated with the output mode of the second position detection sensor (27) and stored in the reference position table 63.

[0063] In addition, the elevator control device 3 also inputs the table generation 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.

[0064] The door area position generating unit 65 starts to operate when the input table generates a start signal. When the door area position generating unit 65 starts to operate, it sequentially accumulates the movement amount of the car 20 calculated by the movement amount detecting unit 60 to calculate the position of the car 20. The door area position generating unit 65 maintains the calculated position of the car 20, and updates the maintained position of the car 20 to a new accumulated value each time the movement amount is accumulated. In addition, the door area position generating unit 65 calculates the center position of the door area 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 maintained by the door area position generating unit 65, and further calculates the door area range based on the calculated door center position and the specified door area width. The door area position generating unit 65 stores the calculated door area range in the door area position table 68.

[0065] The fault detection unit 66 detects that the output mode ( Figure 2), the reference position table 63 is referred to, and based on the car position signal input from the car position detection unit 62, a failure of the discrete second position detection sensor (27) is detected. At this time, the failure detection unit 66 determines whether the detected switching state is the same as the switching state of the position information shown in the reference position table 63 corresponding to the car position signal. If they are not the same, it is determined that the second position detection sensor (27) has failed. The safety control device 2 outputs the determination result based on the failure detection unit 66 as a failure detection signal.

[0066] The door area detection unit 67 refers to the door area 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 area stored in the door area position table 68. When the door area detection unit 67 determines that the current position of the car 20 is within the range of the door area, the safety control device 2 outputs the determination result based on the door area detection unit 67 as a door area position signal.

[0067] As will be described later, the door area position table 68 stores the car position information and the door area information in association with each other.

[0068] Here, the table generation start signal and the position correction signal are described.

[0069] The table generation start signal is a signal for instructing the safety controller 2 to start generating the reference position table 63 and the door area position table 68. The table generation start signal is input to the safety controller 2 from the elevator controller 3 or a maintenance terminal device owned by a maintenance engineer.

[0070] The elevator control device 3 also generates a start signal based on the table and starts a predetermined action. That is, the elevator control device 3 operates the car 20 from the lowest floor to the highest floor or from the highest floor to the lowest floor at a speed lower than the rated speed in order to measure the parking position of the car 20 on each floor and the height dimension between floors.

[0071] The position correction signal is a signal for providing information on the floor level position of the car 20 used by the safety controller 2 to calculate the door zone to the safety controller 2. The position correction signal is input to the safety controller 2 from a maintenance terminal device used by a maintenance engineer.

[0072] In the present embodiment, the position correction signal indicates the offset between the car floor and the landing floor when the car 20 stops at each floor when the car 20 is running in order to measure the above-mentioned parking position and the height dimension between floors. The door area position generating unit 65 in the safety control device 2 calculates the center position of the door area based on the position information indicated by the car position signal from the car position detecting unit 62 when the car stops and the offset indicated by the position correction signal. Furthermore, the door area position generating unit 65 calculates the center position of the door area based on the calculated value and the distance from the center position of the door area to the upper and lower ends (for example, 150 mm each) which is preset. Figure 7 )), calculate the range of the gate area.

[0073] Figure 4 The reference position storage processing unit 64 ( Figure 3 )'s action flow chart.

[0074] In step S101, the reference position storage processing unit 64 determines whether the table generation start signal that issues an instruction to start generating the reference position table 63 is on. If the reference position storage processing unit 64 determines that it is on ("Yes" in step S101), step S102 is then executed. If it is determined that it is not on ("No" in step S101), the processing ends.

[0075] In step S102, the reference position storage processing unit 64 accumulates the movement amount of the car 20 detected by the first position detection sensor (8), that is, 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 executes step S103.

[0076] In step S103, the reference position storage processing unit 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 mode has been switched. When the reference position storage processing unit 64 determines that the output state has changed ("Yes" in step S103), step S104 is then executed. When the reference position storage processing unit 64 determines that the output state has not changed ("No" in step S103), step S102 is executed again.

[0077] In step S104, the reference position storage processing unit 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 processing unit 64 executes step S105.

[0078] In step S105, the reference position storage processing unit 64 determines whether the table generation start signal is off. If the reference position storage processing unit 64 determines that it is off ("Yes" in step S105), step S106 is then executed. If it is determined that it is not off ("No" in step S105), step S102 is executed again.

[0079] In step S105, the reference position storage processing unit 64 completes the generation of the reference position table 63. When the reference position storage processing unit 64 completes the generation of the reference position table 63, a series of processes ends.

[0080] Figure 5 An example of the reference position table 63 is shown.

[0081] Figure 5 The reference position table 63 shown is generated while the car 20 is running from the lowermost floor to the uppermost floor.

[0082] Figure 5 The change in the output state of the second position detection sensor (27) shown in FIG. 1 indicates that the second position detection sensor (27) detects that the detected plate ( Figure 2 )'s edge. Figure 5 In the process, starting from the top, detect the upper edge (upper end) of the detected board located at the terminal layer (lowermost layer), the upper edge of the detected board located at the terminal layer (lowermost layer), the lower edge of the detected board at position a, the upper edge of the detected board at position a, the lower edge of the detected board at position b, and the upper edge of the detected board at position b.

[0083] Figure 5 The car position information shown 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.

[0084] like Figure 5 As shown, the reference position table 63 stores discrete positions of the car 20 corresponding to the output state of the second position detection sensor (27).

[0085] Figure 6 The door area position generating unit 65 ( Figure 3 )'s action flow chart.

[0086] In step S201, the gate area position generating unit 65 determines whether the table generation start signal for issuing an instruction to start generating the gate area position table 68 is on. If the gate area position generating unit 65 determines that it is on ("Yes" in step S201), step S202 is then executed. If it is determined that it is not on ("No" in step S201), the processing ends.

[0087] In step S202, the door area position generating unit 65 accumulates the movement amount of the car 20 detected by the first position detecting sensor (8), that is, the relative position detecting sensor 8, and updates the current car position information to the accumulated value. After executing step S202, the door area position generating unit 65 executes step S203.

[0088] In step S203, the gate area position generating unit 65 determines whether the position correction signal is input. If the gate area position generating unit 65 determines that the position correction signal is input ("Yes" in step S203), step S204 is then executed. If the gate area position generating unit 65 determines that the position correction signal is input ("No" in step S201), step S202 is executed again.

[0089] In step S204, the door area position generating unit 65 calculates the range of the door area based on the current car position information when the car is stopped, the offset indicated by the position correction signal, and the specified door area width. The door area position generating unit 65 sets the calculated door area range in the door area position table 68 in correspondence with the car position information and the offset. After executing step S204, the door area position generating unit 65 then executes step S205.

[0090] In step S205, the door area position generating unit 65 determines whether the table generation start signal is off. If the door area position generating unit 65 determines that it is off ("Yes" in step S205), step S206 is then executed. If it is determined that it is not off ("No" in step S205), step S202 is executed again.

[0091] In step S205, the door area position generating unit 65 completes the generation of the door area position table 68. When the door area position generating unit 65 completes the generation of the reference position table 63, a series of processing ends.

[0092] Figure 7 An example of the door area position table 68 is shown.

[0093] Figure 7 The area range of each door on the lowest floor and high floors is shown from the top.

[0094] The offset indicated by the position correction signal is the distance between the landing floor and the car floor when the car stops at each floor. The offset value is positive when the landing floor is above the car floor, and negative when the landing floor is below the car floor. When the position of the landing floor coincides with the position of the car floor, the offset is zero.

[0095] In this embodiment, the center position of the door area is the position of the floor of the landing. In addition, the door area width is 300 mm. Therefore, the door area extends to a range of ±150 mm from the center position of the door area, that is, it extends to 150 mm upward and 150 mm downward from the center position of the door area.

[0096] In this embodiment, the position of the floor of the lowest floor (1st floor) is used as the reference position. In addition, when the car 20 is stopped at the lowest floor with the floor of the floor aligned with the floor of the car, the door area position table 68 is generated. Figure 7 As shown, the car position information and the offset are both 0 (zero). Therefore, the calculated door area range is "-150mm to +150mm".

[0097] On the second floor, the car position information and offset are 3995mm and +5mm respectively. The offset is a positive value, so the landing floor is above the car floor. Therefore, the center position of the door area (the location of the landing floor) is calculated by adding the offset (positive value) to the car position information, which is 4000mm (3995mm+(+5mm)). Since the range of the door area is the center position of the door area ± (the width of the door area / 2), it is calculated as 4000mm±150mm, that is, "3850mm~4150mm".

[0098] On the third floor, the car position information and offset are 8003mm and -3mm respectively. The offset is a negative value, so the landing floor is below the car floor. Therefore, the center position of the door area (the location of the landing floor) is calculated by adding the offset (negative value) to the car position information, which is 8000mm (8003mm+(-3mm)). The range of the door area is calculated to be 8000mm±150mm, that is, "7850mm~8150mm".

[0099] For other layers, the range of the gate area is calculated similarly.

[0100] Here, the door region setting operation based on the input of the position correction signal in this embodiment will be described.

[0101] The maintenance technician issues a command to the elevator control device 3 to move the car 20 to the lowest floor (terminal floor) and stops the car 20 in a state where the car floor and the landing floor are aligned. After the car 20 stops at the lowest floor, the maintenance technician operates the maintenance terminal device and generates a start signal (conduction) to the input table of the safety control device 2. Then, the maintenance technician issues a command to the elevator control device 3 to move the car 20 from the lowest floor to the highest floor and stop it at each floor. When the car 20 stops at each floor, the maintenance technician measures the step between the car floor and the landing floor, that is, the offset. The maintenance technician sends the measured value of the offset from the maintenance terminal device to the safety control device 2 as a position correction signal.

[0102] When the car 20 moves to the uppermost floor and stops, measures the amount of deviation, and sends a position correction signal, the maintenance engineer turns off the table generation start signal. Thus, the door area setting operation is completed.

[0103] In this way, since the door area 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 offset amount, it is possible to reduce the need for high-precision installation and position adjustment of the detected plate.

[0104] Furthermore, since the measured value of the offset amount is transmitted from the maintenance terminal device to the safety control device 2 as a position correction signal, work can be performed inside the car. Therefore, work efficiency and safety are improved.

[0105] Figure 8 The fault detection unit 66 ( Figure 3 )'s action flow chart.

[0106] In step S301, the fault detection unit 66 determines whether the table generation start signal that issues an instruction to start generating the reference position table 63 is off, that is, whether the reference position table 63 is being generated. If the fault detection unit 66 determines that it is off ("Yes" in step S301), step S302 is then executed. If it is determined that it is not off ("No" in step S301), the process ends.

[0107] In step S302, the fault detection unit 66 receives the current car position information from the car position detection unit 62 and receives the output state of the discrete second position detection sensor (27) from the reference position detection unit 61. After executing step S302, the fault detection unit 66 executes step S303.

[0108] 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 those defined in the reference position table 63. If the fault detection unit 66 determines that they are the same ("Yes" in step S303), step S304 is then executed; if it is determined that they are not the same ("No" in step S303), step S305 is then executed.

[0109] In step S304, the fault detection unit 66 determines that the discrete second position detection sensor (27) is normal. When the fault detection unit 66 executes step S304, a series of processing is terminated.

[0110] In step S305, the fault detection unit 66 determines that the discrete second position detection sensor (27) is abnormal, and sends a fault detection signal to the elevator control device 3. When the fault detection unit 66 executes step S305, a series of processing is terminated.

[0111] Furthermore, when receiving a failure detection signal from the failure detection unit 66, the elevator control device 3 makes an emergency stop of the car 20 or moves the car 20 to the nearest floor and stops the car.

[0112] Since the presence or absence of a failure of the discrete second position detection sensor (27) is determined based on the reference position table 63 generated in advance, the failure can be detected in real time during the operation of the elevator.

[0113] Furthermore, as described above, since the accumulated value of the movement amount of the car 20 can be corrected based on the pre-generated reference position table 63, the reliability of the detected position of the car 20 can be ensured by setting any number of detected plates at any location in the elevator shaft.

[0114] In addition, in the present embodiment, the door area is also set in the terminal floor (lowest floor) which is the reference floor of the position in the elevator shaft by the detected plate 50. Thus, when 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.

[0115] According to the above embodiment, the range of the door area of ​​each floor is calculated in advance based on the position of the car detected by accumulating the movement amount of the car 20, and it is determined whether the current position of the car 20 is within the range of the pre-calculated door area. As a result, the high-precision installation and position adjustment of the detected plate are not required or reduced. Therefore, the setting of the door area becomes easy without reducing the position detection accuracy of the car.

[0116] In addition, when a detected plate is provided to improve the detection accuracy of the position of the car 20, the output of the discrete position detection sensor 27 that detects the detected plate and the correspondence with the discrete position of the car are obtained in advance, so that the installation location, number, size, etc. of the detected plate can be arbitrary. For example, it is also possible to set only one detected plate on the reference layer (the lowest layer in the above embodiment) that serves as the reference for the position in the elevator shaft. Therefore, even when a detected plate is provided, the high-precision installation and position adjustment of the detected plate can be reduced. In addition, since the size and number of the detected plates can be reduced, the risk of the main rope hooking the detected plate during an earthquake can be reduced.

[0117] Furthermore, by acquiring in advance the correspondence between the output of the discrete position detection sensor 27 for detecting the detected plate and the discrete positions of the car, a failure of the discrete position detection sensor 27 can be detected during the operation of the elevator.

[0118] In addition, the present invention is not limited to the above-mentioned embodiments, but also includes various modifications. For example, the above-mentioned embodiments are described in detail for easy understanding of the present invention, but are not limited to having all the structures described. In addition, for a part of the structure of the embodiment, other structures can be added, deleted, or replaced.

[0119] For example, elevators are not limited to Figure 1 The so-called machine room-less elevator shown may also be an elevator with a machine room.

[0120] Description of symbols

[0121] 2 Safety control device

[0122] 3 Elevator control device

[0123] 4 Electromagnetic contactor

[0124] 5 Braking device

[0125] 7 Speed ​​​​regulator

[0126] 8 Relative position detection sensor

[0127] 9 Electric Motor

[0128] 10 Building power supply

[0129] 20 Car

[0130] 21 Main rope

[0131] 22 Counterweight

[0132] 23rd floor station side door

[0133] 27 Position detection sensor

[0134] 30 Buffer

[0135] 50~54 panels to be tested

[0136] 60 Movement amount detection unit

[0137] 61 Reference position detection unit

[0138] 62 Car position detection unit

[0139] 63 Reference position table

[0140] 64 Reference position storage processing unit

[0141] 65 Door area position generation unit

[0142] 66 Fault detection unit

[0143] 67 Door Area Detection Unit

[0144] 68 Door zone location table.

Claims

1. A position detection system for an elevator, comprising: a first position detector, the first position detector detecting an amount of movement of the car; as well as a control device for detecting the position of the car based on an integrated value of the movement amount of the car detected by the first position detection sensor, The elevator position detection system is characterized in that: The control device stores the range of the door area of ​​each floor, It is determined whether the detected position of the car is within the range of the stored door area.

2. The elevator position detection system according to claim 1, characterized in that: The control device calculates the range of the door area based on the position of the car detected when the car stops at each floor, the offset between the floor of the car and the landing floor of each floor, and the specified width of the door area.

3. The elevator position detection system according to claim 2, characterized in that: The control device transmits the offset from the terminal device to the control device.

4. The elevator position detection system according to claim 1, characterized in that: Also includes: A detected object, wherein the detected object is arranged in an elevator shaft; as well as a second position detection sensor, the second position detection sensor being disposed in the car and detecting the detected object; The control device detects the position of the car by correcting the integrated value of the movement amount according to the output state of the second position detection sensor.

5. The elevator position detection system according to claim 4, characterized in that: the control device stores the output state of the second position detection sensor and the discrete positions of the car corresponding to the output state, The accumulated value is corrected based on the stored discrete positions of the car.

6. The elevator position detection system according to claim 5, characterized in that: The control device operates the car and stores the detected position of the car as the discrete position based on the output state of the second position detection sensor.

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

8. The elevator position detection system according to claim 1, characterized in that: The first position detection sensor is a rotational position detection sensor that rotates according to the movement of the car.

9. A method for detecting the position of an elevator, which detects the position of the elevator car based on the accumulated value of the movement amount of the elevator car, wherein: The range of the door area at each floor is calculated in advance based on the position of the car when the car stops at each floor, the offset between the floor of the car and the landing floor of each floor, and the specified width of the door area. It is determined whether the detected position of the car is within the range of the door area calculated in advance.

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