Elevator System

Abstract

An elevator system capable of improving the accuracy of bias correction is provided. The elevator system comprises: a seismograph having an acceleration sensor, which measures the magnitude of a seismic shaking that occurs through the acceleration sensor; and a control panel, which controls the operation of a car inside a hoistway and detects the magnitude of the seismic shaking based on a value obtained by removing the influence of a bias error from a measurement value of the acceleration sensor of the seismograph, the control panel comprising: a determination unit, which determines whether multiple conditions related to the operation of the car are satisfied based on multiple operation information related to the operation of the car; and a processing unit, which calculates the value of the bias error based on the measurement value measured by the acceleration sensor of the seismograph when the determination unit determines that the multiple conditions are satisfied.

Description

Technical Field

[0001] The present disclosure relates to elevator systems. Background Art

[0002] Patent document 1 discloses an elevator system. In the elevator system, a seismograph detects vibration by measuring acceleration. When the seismograph determines that the detected vibration is not caused by an earthquake but is noise, the seismograph performs an offset correction based on the detected vibration. The seismograph can detect the vibration caused by an earthquake based on the measured value obtained after the offset correction.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent No. 6666023 Summary of the invention

[0006] Problems to be solved by the invention

[0007] However, in the elevator system described in Patent Document 1, the cause of the vibration determined as noise can be assumed to be a variety of events. The type of the vibration varies depending on the type of the event that is the cause. Therefore, depending on the type of the event that is the cause, the accuracy of the offset correction performed later may be reduced.

[0008] The present disclosure is made to solve the above-mentioned problems. An object of the present disclosure is to provide an elevator system capable of improving the accuracy of offset correction.

[0009] Means for solving problems

[0010] The elevator system disclosed in the present invention comprises: a seismograph having an acceleration sensor, which measures the magnitude of a seismic shake by means of the acceleration sensor; and a control panel, which controls the operation of a car inside a shaft and detects the magnitude of the seismic shake based on a value obtained by removing the influence of a bias error from a measurement value of the acceleration sensor of the seismograph, wherein the control panel comprises: a determination unit, which determines whether a plurality of conditions related to the operation of the car are satisfied based on a plurality of operation information related to the operation of the car; and a processing unit, which calculates the value of the bias error based on a measurement value measured by the acceleration sensor of the seismograph when the determination unit determines that the plurality of conditions are satisfied.

[0011] Effects of the Invention

[0012] According to the present disclosure, when it is determined that a plurality of conditions are satisfied, offset error information is generated, thereby improving the accuracy of offset correction. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a diagram showing an overview of a building in which the elevator system according to the first embodiment is installed.

[0014] Figure 2 This is a diagram showing output values ​​of acceleration measured by a seismograph of the elevator system according to the first embodiment.

[0015] Figure 3 This is a block diagram of the elevator system according to the first embodiment.

[0016] Figure 4 This is a flowchart for explaining an outline of the calibration process performed by the control panel of the elevator system according to the first embodiment.

[0017] Figure 5 This is a flowchart for explaining the outline of the operation of the control panel of the elevator system according to the first embodiment.

[0018] Figure 6 This is a hardware configuration diagram of the control panel of the elevator system according to the first embodiment.

[0019] Figure 7 This is a diagram showing another example of a building in which the elevator system according to the first embodiment is installed. DETAILED DESCRIPTION

[0020] The mode for implementing the present disclosure is described with reference to the accompanying drawings. In addition, in each figure, the same reference numerals are given to the same or corresponding parts, and the repeated description of the parts is appropriately simplified or omitted.

[0021] Implementation method 1.

[0022] Figure 1 This is a diagram showing an overview of a building in which the elevator system according to the first embodiment is installed.

[0023] like Figure 1 As shown, an elevator system 1 is installed in a building 2. A hoistway 3 passes through each floor of the building 2.

[0024] The plurality of guide rails 4 are provided as hoistway equipment inside the hoistway 3. Specifically, the plurality of guide rails 4 are supported on the floor of the hoistway 3. The plurality of guide rails 4 extend from the floor of the hoistway 3 to the upper part of the hoistway 3. The plurality of guide rails 4 are connected and fixed to the inner wall of the hoistway 3.

[0025] The hoistway equipment is equipment directly or indirectly connected to the inner wall of the hoistway 3. That is, the hoistway equipment is equipment directly connected to the inner wall of the hoistway 3 by bolts or the like, or equipment connected to equipment directly connected to the inner wall of the hoistway 3 by bolts or the like.

[0026] The mechanical table 5 is provided as a hoistway device inside the hoistway 3. The mechanical table 5 is provided on each of the plurality of guide rails 4. The mechanical table 5 is supported in the vertical direction by each of the plurality of guide rails 4. In addition, the mechanical table 5 may also be supported in the horizontal direction by being further fixed to the inner wall of the hoistway 3.

[0027] The hoisting machine 6 is placed on the upper surface of the machine table 5. The hoisting machine 6 is supported by the machine table 5 in the vertical direction. That is, the machine table 5 is a table that supports the hoisting machine 6. The main rope 7 is hung around the hoisting machine 6.

[0028] The car 8 is suspended on one side of the main rope 7 inside the hoistway 3. The car 8 is adjacent to the plurality of car guide rails 4a among the plurality of guide rails 4. The counterweight 9 is suspended on the other side of the main rope 7 inside the hoistway 3. The counterweight 9 is adjacent to the plurality of counterweight guide rails 4b among the plurality of guide rails 4.

[0029] The control panel 10 is installed on the machine platform 5 etc. The control panel 10 can control the elevator system 1 as a whole.

[0030] The two seismographs 11 are devices for detecting the occurrence of an earthquake and the magnitude of the shaking caused by the earthquake. The two seismographs 11 have the same structure. The seismograph 11 has an acceleration sensor. The seismograph 11 can output the measured value information of the acceleration sensor to the control panel 10. At this time, the seismograph 11 can also output the situation that the measured value exceeds a predetermined threshold, that is, information indicating that an earthquake has occurred.

[0031] The first seismograph 11a of the two seismographs is fixed to a side surface of one of the guide rails 4. The second seismograph 11b of the two seismographs is installed on the mechanical stand 5.

[0032] In addition, although not shown, a ground seismometer may also be provided on the ground of the shaft 3. In this case, the ground seismometer may also have the same structure as the seismometer 11. The ground seismometer can detect the shaking of the foundation on which the building 2 is built more accurately than the two seismometers 11. The first seismometer 11a and the second seismometer 11b can more accurately measure shaking of a frequency different from the frequency detected by the ground seismometer, shaking caused by the resonance of the building 2, and other shaking that cannot be measured by the ground seismometer.

[0033] When the elevator system 1 is in the normal operation state, the control panel 10 rotates the hoisting machine 6. The main ropes 7 move following the rotation of the hoisting machine 6. The car 8 and the counterweight 9 move up and down in opposite directions following the movement of the main ropes 7.

[0034] At this time, the car 8 is guided by the multiple car guide rails 4a to be raised and lowered. Specifically, the car 8 moves along the length direction of the multiple car guide rails 4a while contacting any of the multiple car guide rails 4a, or while repeatedly separating from and contacting any of the car guide rails 4a. Similar to the case where the car 8 is guided by the multiple car guide rails 4a, the counterweight 9 is guided by the multiple counterweight guide rails 4b to be raised and lowered. In addition, when the car 8 cannot move for more than a specified time, the control panel 10 sets the car 8 to a suspended state in normal operation.

[0035] When an earthquake occurs in the area where the building 2 is constructed, the two seismographs 11 measure the acceleration of the shaking caused by the earthquake. At this time, the two seismographs 11 can also detect the occurrence of an earthquake based on the measured acceleration. The two seismographs 11 respectively send earthquake information including the measured acceleration value of the shaking to the control panel 10. The control panel 10 detects the occurrence of an earthquake based on the earthquake information. When the value after removing the influence of the pre-stored bias error from the measured value of the seismograph 11 contained in the earthquake information exceeds the threshold value, the control panel 10 switches the operating state from normal operation to emergency operation. In this case, for example, as an emergency operation, the control panel 10 makes the car 8 stop urgently. At this time, as an emergency operation, the control panel 10 performs a control operation to make the car 8 stop urgently to the nearest floor.

[0036] Then, the control panel 10 determines whether to implement the automatic diagnosis operation. When the corrected measurement value after removing the influence of the offset error from the measurement value of the seismograph 11 included in the earthquake information is below the threshold value of the automatic diagnosis operation, the control panel 10 performs the automatic diagnosis operation for transferring from the emergency operation state to the normal operation state. On the other hand, when the corrected measurement value exceeds the threshold value of the automatic diagnosis operation, the control panel 10 does not perform the automatic diagnosis operation. This is because the equipment of the elevator system 1 may have a fault to the extent that the automatic diagnosis operation should not be performed.

[0037] Next, use Figure 2 Explain the bias error.

[0038] Figure 2 This is a diagram showing output values ​​of acceleration measured by a seismograph of the elevator system according to the first embodiment.

[0039] Figure 2 is a graph g showing the relationship between time and the output value of the acceleration sensor of the seismograph 11. Figure 2 In FIG. 1 , the dotted line 1 represents a true value of an ideal acceleration value that the acceleration sensor should originally output in a stable state.

[0040] like Figure 2 As shown in FIG. 1 , the output value g of the acceleration sensor shown in the graph g is not necessarily always the true value l. The output value g of the acceleration sensor may change due to various factors. For example, the output value g of the acceleration sensor may be affected by factors such as the vibration generated by the seismograph 11, the temperature change around the acceleration sensor, and the installation angle of the acceleration sensor. Specifically, depending on the installation angle of the acceleration sensor, there is a certain difference between the output value of the acceleration sensor and the true value.

[0041] The vibrations generated by the seismograph 11 include vibrations that are transmitted to the seismograph 11 when the guide rail 4 guides the car 8, vibrations that are transmitted to the seismograph 11 from the car 8 via the main rope 7 or the guide rail 4 when an object gets on the car 8 or gets off the car 8, and vibrations that are generated when the door of the car 8 opens and closes and that are transmitted to the seismograph 11. This vibration can be transmitted to both the first seismograph 11a and the second seismograph 11b via the guide rail 4, the machine table 5, other structures, and the like.

[0042] The bias error E is a difference caused by the influence of such factors, and is a difference between the output value g and the true value l. The control panel 10 stores information on the value of the bias error in advance. For example, when the control panel 10 receives earthquake information from the seismograph 11, it deducts the bias error from the output value of the acceleration sensor included in the earthquake information as the true value, and uses it as the corrected measurement value.

[0043] Next, use Figure 3 The control panel 10 will be described.

[0044] Figure 3 This is a block diagram of the elevator system according to the first embodiment.

[0045] like Figure 3 As shown, the control panel 10 includes a storage unit 12 , a correction calculation unit 13 , an overall control unit 14 , a determination unit 15 , and a processing unit 16 .

[0046] The storage unit 12 stores offset error value information.

[0047] The correction calculation unit 13 corrects the measured value of the acceleration sensor by calculating a corrected measured value after removing the influence of the bias error from the measured value of the acceleration sensor contained in the seismic information. Specifically, when the correction calculation unit 13 receives seismic information from the seismograph 11, it subtracts the bias error value contained in the storage unit 12 from the measured value of the acceleration sensor, thereby calculating the corrected measured value.

[0048] The overall control unit 14 controls the elevator system 1 as a whole. For example, the overall control unit 14 controls the operation state. The overall control unit 14 creates a plurality of operation information related to the operation of the elevator system 1.

[0049] The overall control unit 14 controls the operation of recovering from the earthquake based on the earthquake information when an earthquake occurs. Specifically, first, when the overall control unit 14 receives earthquake information from the seismograph 11, it detects that an earthquake has occurred, thereby switching the operation state to emergency operation. Then, the overall control unit 14 controls the recovery operation based on the corrected measurement value calculated by the correction operation unit 13. For example, when the corrected measurement value exceeds the threshold value of the automatic diagnosis operation, the overall control unit 14 does not perform the automatic diagnosis operation.

[0050] In order to determine whether to generate the bias error value, the determination unit 15 determines whether a plurality of conditions related to the operation of the car 8 are satisfied. At this time, the determination unit 15 determines whether the plurality of conditions are satisfied based on a plurality of operation information related to the operation of the car 8 generated by the overall control unit 14. The plurality of conditions are conditions for reducing the bias error caused by the vibration generated in the seismograph 11. In particular, the plurality of conditions are conditions for reducing the vibration propagated from the car 8 to the seismograph 11.

[0051] The first condition among the plurality of conditions is satisfied when the operation state of the car 8, which is the operation state of the elevator system 1, is in normal operation. The determination unit 15 determines whether the first condition is satisfied based on one or more operation information indicating the operation state of the car 8 among the plurality of operation information. For example, when the car 8 is in an emergency stop state, or when the car 8 is in a controlled operation state after an emergency stop, the determination unit 15 determines that the first condition is not satisfied.

[0052] The second condition among the plurality of conditions is satisfied when the car 8 is stopped. The determination unit 15 determines whether the second condition is satisfied based on one or more pieces of operation information indicating whether the car 8 is stopped or one or more pieces of operation information indicating whether the car 8 is moving.

[0053] The third condition among the plurality of conditions is satisfied when an object such as a person or a robot is not riding in the car 8 and the object is not getting off the car 8. The determination unit 15 determines whether the third condition is satisfied based on one or more pieces of operation information indicating the movement status of the object inside the car 8 among the plurality of operation information.

[0054] Specifically, for example, the determination unit 15 determines that the third condition is satisfied when it determines that no weight change occurs inside the car 8 based on information on a measured value of a weighing device (not shown) provided in the car 8. For example, the determination unit 15 determines that the third condition is satisfied when it determines that there is no object moving inside the car 8 based on video information from a video device that photographs the inside of the car 8. For example, the determination unit 15 determines that the third condition is satisfied when the time that the car door is in a fully closed state exceeds a prescribed time based on information on the opening and closing of a car door provided in the car 8. For example, the determination unit 15 determines that the third condition is satisfied when it determines that the car 8 is suspended during normal operation based on information indicating that the lighting inside the car 8 is off or information indicating that the car 8 is suspended.

[0055] When determining that the first condition is satisfied, the second condition is satisfied, and the third condition is satisfied, the determination unit 15 determines that the plurality of conditions are satisfied.

[0056] In addition, a further condition may be added to the multiple conditions. In this case, the determination unit 15 determines whether all the conditions included in the multiple conditions are satisfied. For example, the fourth condition among the multiple conditions is satisfied when the car door is fully opened or fully closed. When the determination unit 15 determines that the car door is fully opened or fully closed based on the information indicating the open and closed state of the car door, it determines that the fourth condition is satisfied.

[0057] The processing unit 16 performs a correction process for the bias error. Specifically, when the determination unit determines that the multiple conditions are satisfied, the processing unit 16 obtains the measurement value information measured by the acceleration sensor of the seismograph 11 at that time. As a correction process, the processing unit 16 calculates the bias error value based on the obtained measurement value information and generates the bias error value information. The processing unit 16 stores the generated bias error value information in the storage unit 12. When the storage unit 12 already stores the bias error value information, the processing unit 16 updates the bias error value information stored in the storage unit 12 to the latest bias error value information.

[0058] As an example of correction processing, the processing unit 16 calculates a bias error value so that all acceleration components in the horizontal direction of the acceleration sensor measurement value are 0. As an example of correction processing, the processing unit 16 calculates a bias error value so that all acceleration components in the vertical direction of the acceleration sensor measurement value are 1G.

[0059] Next, use Figure 4 The correction process will be described.

[0060] Figure 4 This is a flowchart for explaining an outline of the calibration process performed by the control panel of the elevator system according to the first embodiment.

[0061] Figure 4 The calibration process shown can be executed at any timing. For example, the calibration process starts at a predetermined time.

[0062] In step S01 , the determination unit 15 of the control panel 10 acquires a plurality of operation information of the elevator system 1 from the overall control unit 14 .

[0063] Then, the operation of step S02 is performed. In step S02, the determination unit 15 determines whether all of the plurality of conditions are satisfied.

[0064] When it is determined in step S02 that all of the plurality of conditions are satisfied, the operation of step S03 is performed. In step S03, the processing unit 16 of the control panel 10 calculates the offset error value.

[0065] Then, the operation of step S04 is performed. In step S04 , the processing unit 16 stores the calculated offset error value information in the storage unit 12 , or updates the offset error value information stored in the storage unit 12 .

[0066] Then, the control panel 10 ends the operation of the flowchart.

[0067] When it is determined in step S02 that at least one of the plurality of conditions is not satisfied, the control panel 10 ends the operation of the flowchart.

[0068] Next, use Figure 5 The operation of the control panel 10 when an earthquake occurs will be described.

[0069] Figure 5 This is a flowchart for explaining the outline of the operation of the control panel of the elevator system according to the first embodiment.

[0070] exist Figure 5 In the flowchart, the control panel 10 always monitors whether earthquake information is sent from the seismograph 11.

[0071] In step S11 , the overall control unit 14 of the control panel 10 determines whether earthquake information has been received from the seismograph 11 .

[0072] When it is determined in step S11 that earthquake information has not been received, the operation of step S11 is repeated.

[0073] If it is determined in step S11 that earthquake information has been received, the operation of step S12 is performed. In step S12, the correction calculation unit 13 of the control panel 10 calculates a corrected measurement value based on the measurement value of the acceleration sensor included in the earthquake information and the offset error value stored in the storage unit 12.

[0074] Then, the operation of step S13 is performed. The overall control unit 14 obtains information on the corrected measurement value from the correction calculation unit 13. The overall control unit 14 determines the operation state such as whether to perform controlled operation or automatic diagnosis operation during operation after earthquake recovery based on the corrected measurement value.

[0075] Then, the control panel 10 ends the operation of the flowchart.

[0076] According to the first embodiment described above, the elevator system 1 includes a seismograph 11 and a control panel 10. The control panel 10 includes a determination unit 15 and a processing unit 16. The control panel 10 determines whether a plurality of conditions related to the operation of the car 8 are satisfied based on a plurality of operation information related to the operation of the car 8. When the control panel 10 determines that a plurality of conditions are satisfied, the bias error value is calculated. The control panel 10 detects the magnitude of the earthquake shaking based on a value obtained by removing the influence of the bias error from the measured value of the acceleration sensor from the seismograph 11. Here, the influence of the bias error is a value calculated when a plurality of conditions are satisfied. Therefore, the accuracy of the bias correction using the bias error can be improved.

[0077] Furthermore, the control panel 10 determines that the plurality of conditions are satisfied when the first condition, the second condition, and the third condition are all satisfied. The first condition, the second condition, and the third condition are conditions for reducing the vibration caused by the car 8. Therefore, the control panel 10 can calculate an offset error that reduces the influence of the disturbance caused by the vibration accompanying the operation of the elevator system 1. As a result, the accuracy of the offset correction can be improved.

[0078] Furthermore, the control panel 10 does not use the measured value information of the acceleration sensor of the seismograph 11 when determining whether a plurality of conditions are satisfied. That is, the control panel 10 uses only information related to the operation information of the elevator system 1 to determine whether a plurality of conditions are satisfied. Assuming that the measured value information of the acceleration sensor is reflected in the determination, for example, a condition that the measured value of the acceleration sensor is lower than or exceeds a predetermined threshold value may be set as a condition to be satisfied. However, since the measured value of the acceleration sensor already includes the influence of the bias error, the accuracy of the bias correction may be reduced when this condition is set. On the other hand, in the present embodiment, since no condition is set for the measured value information of the acceleration sensor, the accuracy of the bias correction can be improved.

[0079] In addition, the seismograph 11 is not directly installed on the building 2, but is set in the hoistway equipment. Specifically, the first seismograph 11a is set on the guide rail 4. The second seismograph 11b is set on the mechanical table 5 supported by the plurality of guide rails 4. The hoistway equipment transmits the vibration caused by the vibration accompanying the operation of the elevator system 1 to the seismograph 11. That is, in this case, the measured value of the acceleration sensor of the seismograph 11 can be greatly affected by the bias error caused by the vibration. The control panel 10 can calculate the bias error value that can reduce the influence of the bias error caused by such vibration.

[0080] In addition, there may be only one seismograph 11. In this case, the seismograph 11 is installed in the hoistway equipment such as the guide rail 4 and the machine platform 5 separately from the ground seismograph (not shown).

[0081] In addition, the calculation of the correction calculation unit 13 may be performed at any time instead of when earthquake information is received. Alternatively, when the overall control unit 14 needs to refer to the measured value of the seismograph 11 at a time other than when earthquake information is received, the correction calculation unit 13 calculates the corrected measured value and refers to the corrected measured value.

[0082] Next, use Figure 6 An example of hardware constituting the control panel 10 will be described.

[0083] Figure 6 This is a hardware configuration diagram of the control panel of the elevator system according to the first embodiment.

[0084] Each function of the control panel 10 can be realized by a processing circuit. For example, the processing circuit includes at least one processor 100a and at least one memory 100b. For example, the processing circuit includes at least one dedicated hardware 200.

[0085] When the processing circuit has at least one processor 100a and at least one memory 100b, each function of the control panel 10 is implemented by software, firmware, or a combination of software and firmware. At least one of the software and firmware is described as a program. At least one of the software and firmware is stored in at least one memory 100b. At least one processor 100a implements each function of the control panel 10 by reading and executing the program stored in at least one memory 100b. At least one processor 100a is also called a central processing unit, a processing unit, a computing unit, a microprocessor, a microcomputer, or a DSP. For example, at least one memory 100b is a non-volatile or volatile semiconductor memory such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), a disk, a floppy disk, an optical disk, a CD (compact disk), a minidisc, a DVD (Digital Versatile Disk), etc.

[0086] In the case where the processing circuit has at least one dedicated hardware 200, the processing circuit is implemented by, for example, a single circuit, a composite circuit, a programmable processor, a parallel programmable processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination thereof. For example, each function of the control panel 10 is implemented by the processing circuit separately. For example, each function of the control panel 10 is implemented collectively by the processing circuit.

[0087] The functions of the control panel 10 may be partially implemented by dedicated hardware 200, and the other parts may be implemented by software or firmware. For example, the functions performed by the processing unit 16 may be implemented by a processing circuit as dedicated hardware 200, and the functions other than the functions performed by the processing unit 16 may be implemented by at least one processor 100a reading and executing a program stored in at least one memory 100b.

[0088] In this way, the processing circuit implements the functions of the control panel 10 through hardware 200, software, firmware, or a combination thereof.

[0089] Next, use Figure 7 An example in which the seismograph 11 is installed at another location will be described.

[0090] Figure 7 This is a diagram showing another example of a building in which the elevator system according to the first embodiment is installed.

[0091] Although in Figure 1 Although not shown in the figure, the plurality of guide rails 4 are fixed by a plurality of brackets 20. Figure 7 , the brackets 20 provided on two guide rails 4 among the plurality of guide rails 4 are shown. The plurality of brackets 20 each have the same structure.

[0092] The bracket 20 is directly connected to the inner wall of the hoistway 3 as a hoistway equipment. The bracket 20 is fixed to the guide rail 4.

[0093] In this example, the seismograph 11 is fixed to one of the brackets 20. For example, the seismograph 11 is fixed to the bracket 20 that exists at the top among the multiple brackets 20. In addition, another seismograph 11 may be fixed to a bracket 20 that exists at a height corresponding to the middle floor of the building 2 among the multiple brackets 20.

[0094] The vibration caused by the car 8 can be transmitted to the bracket 20 via the guide rail 4. As described above, even when the seismograph 11 is fixed to the bracket 20, the accuracy of the offset correction using the offset error can be improved.

[0095] Industrial Applicability

[0096] As described above, the elevator system of the present disclosure can be utilized in an elevator provided with a seismograph.

[0097] Description of symbols

[0098] 1: Elevator system; 2: Building; 3: Hoistway; 4: Guide rail; 4a: Guide rail for car; 4b: Guide rail for counterweight; 5: Mechanical platform; 6: Traction machine; 7: Main rope; 8: Car; 9: Counterweight; 10: Control panel; 11: Seismograph; 11a: 1st seismograph; 11b: 2nd seismograph; 12: Storage unit; 13: Correction operation unit; 14: Overall control unit; 15: Determination unit; 16: Processing unit; 20: Bracket; 100a: Processor; 100b: Memory; 200: Hardware.

Claims

1. An elevator system, wherein: The elevator system comprises: A seismograph having an acceleration sensor, which is used to measure the magnitude of earthquake shaking; and a control panel for controlling the operation of the car in the hoistway and detecting the magnitude of the earthquake shaking based on the value obtained by removing the influence of the offset error from the measured value of the acceleration sensor of the seismograph, The control panel has: a determination unit that determines whether a plurality of conditions related to the operation of the car are satisfied using first operation information indicating the operation state of the car and second operation information indicating the movement state of an object inside the car; as well as A processing unit that calculates the value of the bias error based on a measurement value measured by the acceleration sensor of the seismograph when the determination unit determines that the plurality of conditions are satisfied.

2. The elevator system according to claim 1, wherein: The multiple conditions include a first condition, a second condition, and a third condition, The first condition is satisfied when the car is in normal operation. The second condition is satisfied when the car is stopped. The third condition is satisfied when no object is boarding the car and no object is getting off the car. The determination unit determines that the plurality of conditions are satisfied when the first condition, the second condition, and the third condition are all satisfied.

3. The elevator system according to claim 1, wherein: The determination unit determines whether the plurality of conditions are satisfied without using measurement value information of the acceleration sensor of the seismograph.

4. The elevator system according to any one of claims 1 to 3, wherein: The seismograph is mounted on a hoistway device connected to the inner wall of the hoistway.

5. The elevator system according to claim 4, wherein: The seismograph is mounted on a guide rail that guides the movement of the car or the counterweight.

6. The elevator system according to claim 4, wherein: The seismograph is mounted on a machine table, which is a table on which a traction machine is placed and is supported by a guide rail for guiding the movement of the car or the counterweight.

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