CN113200425B - Elevator system and car position determination method - Google Patents

Abstract

The invention provides an elevator system and a car position determining method. The elevator system is capable of properly detecting the position of an elevator car. The elevator system is provided with: a storage unit for storing the height of an elevator floor; an air pressure measuring unit that measures the air pressure at the height of the identification body detected by the detecting unit, the air pressure measuring unit being provided in the car; a calculation unit that calculates the air pressure at each floor of the elevator from the air pressure at the height at which the identification body is located and the height of the floor stored in the storage unit; and a determination unit that obtains the position of the car from the air pressure of each floor calculated by the calculation unit and the air pressure measured by the air pressure measurement unit.

Description

Elevator system and car position determination method

Technical Field

The present invention relates to an elevator system and a car position determination method, and is applicable to an elevator system and a car position determination method for determining the position of an elevator car, for example.

Background

The remote monitoring system for detecting abnormality of the elevator detects abnormality of the car, abnormality of the car speed, closing failure, etc. by using information of a control device for controlling the elevator, and notifies the detected state to a control center of the elevator, a terminal of maintenance personnel, etc. In addition, in the remote monitoring system, the current position of the car of the elevator is determined by acquiring position information of the car output from a control device that controls the elevator.

However, in the case of an elevator that cannot use control information output from the control device of the elevator, for example, a relay type elevator that is a old elevator, the control information cannot be collected. Therefore, in a remote monitoring system for remotely monitoring the operation of an elevator, control information of the elevator including a floor or the like at which the car stops cannot be collected, and the current position of the car cannot be grasped. Therefore, a technique of determining the position of the car based on the output value of an external air pressure sensor, an external acceleration sensor, or the like, not based on control information output from the control device is used (see patent literature 1).

In the car position determining device described in patent document 1, the movement and current position of the car are detected based on the output values of the air pressure sensor and the acceleration sensor, and the number of times of opening and closing the door of each floor is counted by the acceleration sensor. The car position determination device sets a reference floor according to the number of times of opening and closing the door, and corrects the air pressure for detecting the floor when the air pressure of the reference floor fluctuates.

Here, there is a problem that the position of the car after the elevator is recovered from the power failure cannot be detected accurately in detecting the current position of the car using an external sensor.

In this regard, in the car position determining device described in patent document 1, after the elevator is recovered from the power failure state, the running and stopping of the elevator by the acceleration sensor are detected, and at the time when the air pressure measurement of all floors is completed, the process for detecting the air pressure of the floors is updated, whereby the position of the car after recovery from the power failure state can be detected.

Patent document 1: japanese patent application laid-open No. 2019-199347

Disclosure of Invention

In the technique described in patent document 1, in order to detect the position of the car after recovery from the power failure state, it is necessary to stop the car at all floors after recovery from the power failure state. However, the use of an elevator involves various aspects, and there are cases where a specific floor is not stopped, and the elevator is not stopped at all floors. In this case, the position of the car after recovery from the power failure state cannot be detected.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an elevator system and the like capable of appropriately detecting the position of a car.

In order to solve the above problems, an elevator system according to the present invention includes: the identification body is arranged in the lifting channel of the elevator; and a detection unit provided in the car of the elevator and detecting the identification body, wherein the elevator system includes: a storage unit that stores the height of the floor of the elevator; an air pressure measuring unit that measures an air pressure at a height of the identification body detected by the detecting unit, the air pressure measuring unit being provided in the car; a calculation unit that calculates the air pressure at each floor of the elevator based on the air pressure at the height of the identifier and the height of the floor stored in the storage unit; and a determining unit that obtains a position of the car based on the air pressure of each floor calculated by the calculating unit and the air pressure measured by the air pressure measuring unit.

In the above configuration, when the identifier provided in the elevating path is detected, the air pressure at the height of the identifier is measured, and the air pressure at each floor is calculated based on the measured air pressure and the height of the floor stored in the storage unit. According to the above configuration, the position of the car can be determined by comparing the measured air pressure with the calculated air pressure at each floor by detecting the identifier, so that the position of the car can be easily detected when the elevator is recovered from a power failure state, for example.

According to the present invention, an elevator system or the like with high reliability can be realized.

Drawings

Fig. 1 is a diagram showing an example of the structure of an elevator system according to embodiment 1.

Fig. 2 is a diagram showing an example of the arrangement of the magnets according to embodiment 1.

Fig. 3 is a diagram showing an example of the configuration of the position specifying device according to embodiment 1.

Fig. 4 is a diagram showing an example of a flowchart of the air pressure calculation process according to embodiment 1.

Fig. 5 is a diagram showing an example of a flowchart of the air pressure correction process according to embodiment 1.

Fig. 6 is a schematic diagram showing a relationship between the air pressure calculated based on embodiment 1 and the actual air pressure.

Fig. 7 is a diagram showing an example of a flowchart of the abnormality detection process according to embodiment 1.

Symbol description

100: elevator system, 101: car, 106: position determination device, 107: and (3) a magnet.

Detailed Description

An embodiment of the present invention will be described in detail below with reference to the drawings. In this embodiment, a technique related to position detection of an elevator car will be mainly described.

In the elevator system according to the present embodiment, for example, a recognition body capable of recognizing a predetermined floor of an elevator is provided on the predetermined floor, and the recognition body is detected by a sensor provided in the car, whereby the detection of the car position can be easily performed.

Here, any floor can be used as the predetermined floor. As the predetermined floor, a floor through which the car frequently passes is preferable. The predetermined floor is preferably a floor where the car stops frequently. The number of floors to be reserved may be 1 or plural. In the present embodiment, the floor located at the uppermost (uppermost), the floor located at the middle (intermediate), and the floor located at the lowermost (lowermost) are exemplified as the predetermined floors, but the present invention is not limited thereto.

The identifier may be a magnet, an RF (radio frequency) tag, a slit (slit), a mark, or the like, which identifies a predetermined floor. As the sensor, for example, a magnetic sensor is used when the identification body is a magnet, a scanner or reader-writer corresponding to RF is used when the identification body is an RF tag, a photoelectric sensor is used when the identification body is a slit, and an image sensor is used when the identification body is a mark. In the present embodiment, the magnet is described as an example of the identifier, but the present invention is not limited to this.

In the following description, when the description is given without distinguishing the same elements, common parts (parts other than the division) in the reference signs including the division are used, and when the description is given with distinguishing the same elements, the reference signs including the division are used. For example, when the description is not given of the specific distinction of the magnets, the description is referred to as "magnet 107", and when the description is given of the distinction of the respective magnets, the description is referred to as "magnet 107-1" and "magnet 107-2".

(1) Embodiment 1

In fig. 1, 100 denotes the elevator system according to embodiment 1 as a whole. Fig. 1 is a diagram showing an example of the structure of an elevator system 100.

The elevator system 100 includes an elevator car 101, a hoisting machine 102, a counterweight 103, a sheave (sheave) 104, a main rope 105, a position determining device 106, and a magnet 107.

The hoisting machine 102 is a device for lifting and lowering the car 101. The counterweight 103 is a device for reducing the load when the car 101 is lifted. The pulley 104 is a sheave for avoiding contact between the car 101 and the counterweight 103. The main ropes 105 are ropes connecting the car 101 and the counterweight 103. The position determining device 106 is provided in the car of the car 101, and detects the magnet 107 and determines the position (floor, altitude, etc.) of the car 101. The following description will exemplify a case where the position specifying device 106 specifies a floor of the car 101.

The uppermost layer is provided with a magnet 107-1 for detecting the uppermost layer. The intermediate layer is provided with an intermediate layer detection magnet 107-2. The lowermost layer is provided with a magnet 107-3 for detecting the lowermost layer.

Fig. 2 is a diagram showing an example of the arrangement of the magnets 107.

The magnet 107-1 for detecting the uppermost layer is provided so that the N pole side in the vicinity of the landing door 201-1 of the uppermost layer in the hoistway where the car 101 is lifted is the hoistway side. The magnet 107-1 for detecting the uppermost floor is provided at a position closest to the position specifying device 106 when the car 101 stops at the uppermost floor.

The magnet 107-2 for intermediate layer detection is composed of a magnet 107-2A for intermediate layer detection provided on the N-pole side as the hoistway side and a magnet 107-2B for intermediate layer detection provided on the S-pole side as the hoistway side. The magnet 107-2A for detecting the intermediate layer and the magnet 107-2B for detecting the intermediate layer are provided near the layer door 201-2 of the intermediate layer in the elevating path. The intermediate layer detection magnet 107-2A and the intermediate layer detection magnet 10-2B are disposed at positions closest to the position determination device 106 when the car 101 is stopped at the intermediate layer.

The lowermost detecting magnet 107-3 is provided so that the S pole side in the vicinity of the lowermost landing door 201-3 in the hoistway where the car 101 is lifted is the hoistway side. The magnet 107-3 for detecting the lowest floor is provided at a position closest to the position determining device 106 when the car 101 stops at the lowest floor.

The installation position of the magnet 107 is an example, and is not limited to the position shown in fig. 2. For example, the magnet 107 may be provided at the upper portion of the landing door 201, at the side portion of the landing door 201, or at another position.

Fig. 3 is a diagram showing an example of the configuration of the position specifying device 106.

The position determination device 106 includes a storage unit 301, a detection unit 302, an air temperature measurement unit 303, an air pressure measurement unit 304, and a computer unit 305.

The storage unit 301 is a storage device such as a ROM (read only memory) or HDD (hard disk drive) and stores information related to the car 101. The storage unit 301 stores, for example, the altitudes of all floors in association with each floor.

The detection unit 302 includes a detection unit 302-1 for the N-pole and a detection unit 302-2 for the S-pole. The N-pole detection unit 302-1 is, for example, a magnetic sensor for detecting the N-pole of the magnet 107, and detects the uppermost-layer detection magnet 107-1 and the intermediate-layer detection magnet 107-2A provided in the elevating path. The S-pole detection unit 302-2 is, for example, a magnetic sensor for detecting the S-pole of the magnet 107, and detects the magnet 107-2B for detecting the middle layer and the magnet 107-3 for detecting the lowest layer.

The air temperature measuring unit 303 is, for example, an air temperature sensor, and measures (detects) the air temperature around the car 101.

The air pressure measuring unit 304 is, for example, an air pressure sensor, and measures (detects) the air pressure around the car 101.

The computer unit 305 is, for example, a computer, and includes a CPU (central processing unit) 310, a memory 320, and a communication interface 330.

The functions of the computer unit 305 (the calculation unit 321, the determination unit 322, and the like) may be realized by, for example, reading out a program from the memory 320 by the CPU310 and executing the program (software), may be realized by hardware such as a dedicated circuit, or may be realized by a combination of software and hardware. In addition, part of the functions of the computer section 305 may be realized by another computer which communicates with the computer section 305.

The calculation unit 321 calculates (estimates) the air pressure detected by the air pressure measurement unit 304 when the car 101 stops at each floor, based on information from the storage unit 301, the detection unit 302-1 for the N pole, the detection unit 302-2 for the S pole, the air temperature measurement unit 303, and the air pressure measurement unit 304.

The calculating unit 321 detects where the car 101 stops at the uppermost layer, the intermediate layer, and the lowermost layer based on information (measured values) from the N-pole detecting unit 302-1 and the S-pole detecting unit 302-2. The calculation unit 321 determines the floor by the combination of the detected magnets 107 of the N pole and the detected magnets 107 of the S pole, that is, the floor is the uppermost floor when only the magnets 107 of the N pole are detected, the floor is the intermediate floor when only the magnets 107 of the N pole and the magnets 107 of the S pole are detected, and the floor is the lowermost floor when only the magnets 107 of the S pole are detected.

The calculating unit 321 includes: a data storage function for storing the air pressure (air pressure data) of each floor used for detecting the position of the car 101 in a predetermined storage area (storage 301, memory 320, other computer, etc.); and a reference data storage function for storing the air pressure and the air temperature when the car 101 reaches the uppermost floor, the intermediate floor, and the lowermost floor in a predetermined storage area.

The determination unit 322 compares the air pressure measured by the air pressure measurement unit 304 with the air pressure calculated for each floor by the calculation unit 321, and determines (detects) the floor closest to the air pressure as the floor where the car 101 is currently located. For example, when the air pressure measured by the air pressure measuring unit 304 is "1009.75 (hPa)", the air pressure of 1 floor calculated by the calculating unit 321 is "1010.00 (hPa)", and the air pressure of 2 floors calculated by the calculating unit 321 is "1009.70 (hPa)", the determining unit 322 determines the floor on which the car 101 is currently located as 2 floors.

Next, a process for calculating the air pressure of each floor at which the position of the car 101 is determined (air pressure calculation process) will be described with reference to a flowchart shown in fig. 4.

Fig. 4 is a diagram showing an example of a flowchart of the air pressure calculation process. The air pressure calculation process indicates the process after the position determination device 106 is started, with the position determination device 106 being powered on. The air pressure calculation process is performed at a predetermined timing (for example, periodically until the process of step S404 or step S408 is performed).

In step S401, when the power is turned on, the position determination device 106 determines whether or not the uppermost layer detection magnet 107-1, the intermediate layer detection magnet 107-2, or the lowermost layer detection magnet 107-3 (whether or not any of the uppermost layer, the intermediate layer, and the lowermost layer is detected for the first time) provided in the elevating path is detected by the N-pole detection unit 302-1 and the S-pole detection unit 302-2. The position determination device 106 shifts the process to step S402 when it is determined that the magnet 107 is detected for the first time, and shifts the process to step S405 when it is determined that the magnet 107 is not detected for the first time.

In step S402, the position determination device 106 stores the air temperature measured by the air temperature measuring unit 303 and the air pressure measured by the air pressure measuring unit 304, respectively, for each floor (detection floor) detected. For example, when the detection layer is the lowest layer, the position determination device 106 stores the measured air temperature and air pressure in association with the lowest layer.

In step S403, the position determination device 106 calculates the air pressure at each floor based on the air temperature measured by the air temperature measuring unit 303, the air pressure measured by the air pressure measuring unit 304, and the altitude of each floor stored in the storage unit 301 in advance by a maintenance tool, not shown.

Here, the position determination device 106 calculates the barometric pressure at each floor using a altimetric equation indicating the relationship between barometric pressure, air temperature, and altitude, for example, the following (equation 1).

P＝PO×((1-0.0065×h)/(T+0.0065×h+273.14)) ^5.257

… … (equation 1)

P: air pressure; p0: sea surface air pressure; h: elevation; t: air temperature

More specifically, first, the position determination device 106 calculates the sea surface air pressure (P0) by substituting (equation 1) the measured air temperature (T) and the air pressure (P) with the altitude (h) of the detection layer stored in the storage unit 301. Next, the position determination device 106 substitutes (formula 1) the air temperature (T) measured for each floor, the calculated sea surface air pressure (P0), and the altitude (h) of the floor stored in the storage unit 301, to calculate the air pressure of each floor. Here, the air temperature is regarded as constant in all floors, and the measured air temperature (T) is used.

In step S404, the position determination device 106 performs setting for storing the calculated air pressure and the like for each floor in order to determine the floor based on the calculated air pressure. Based on the setting, the position specifying device 106 compares the air pressure measured by the air pressure measuring unit 304 with the air pressure of each floor calculated by the calculating unit 321, and can specify the floor of the car 101.

In step S405, the position determination device 106 determines whether or not the magnet 107 provided on the floor other than the floor detected in step S401 is detected by the N-pole detection unit 302-1 and the S-pole detection unit 302-2 (whether or not a floor other than the floor detected first is detected). When it is determined that the magnet 107 provided on the other floor is detected, the position determination device 106 shifts the process to step S406, and when it is determined that the magnet 107 provided on the other floor is not detected, the air pressure calculation process is terminated.

In step S406, the position determination device 106 stores the air temperature measured by the air temperature measuring unit 303 and the air pressure measured by the air pressure measuring unit 304, respectively, for each floor (detection floor) to be detected. For example, when the detection layer is an intermediate layer, the position determination device 106 stores the measured air temperature and air pressure in association with the intermediate layer.

In step S407, the position determination device 106 calculates the air pressure at each floor by connecting the air pressure stored in step S402 and the air pressure stored in step S406.

In the case where the detection layer is 3 or more layers, the process of step S407 may be performed or may not be performed. In the case of performing the processing of step S407, the position determination device 106 calculates the air pressure at each floor by obtaining an approximate straight line by, for example, the least square method.

In step S408, the position determination device 106 performs setting for storing the calculated air pressure and the like for each floor in order to determine the floor based on the calculated air pressure. Based on the setting, the position determination device 106 can compare the air pressure measured by the air pressure measuring unit 304 with the air pressure at each floor calculated by the calculating unit 321, and determine the floor of the car 101.

Here, the air pressure at each floor calculated in step S403 is always a value calculated on the premise that the air temperature at each floor is constant, based on the floor detected in step S401 and the air temperature and air pressure at that time. Therefore, the air pressure may deviate from the actual air pressure at each floor (see fig. 6).

In view of this, in the present elevator system 100, when the air pressure of 2 floors can be measured, the air pressure of each floor is recalculated based on the measured air pressure difference, and the calculation result is made closer to the actual air pressure.

That is, the air pressure also varies with environmental changes such as air temperature at the same altitude. Therefore, it is preferable to perform a process (air pressure correction process) of correcting the air pressure of each floor used for detecting the position of the car 101 with a change in the air pressure.

Fig. 5 is a diagram showing an example of a flowchart of the air pressure correction process. The air pressure correction process is performed at a predetermined timing (for example, periodically at a time designated in advance). For example, by always performing the air pressure correction process, when a change in air pressure occurs, the correction of air pressure is immediately performed, and thus, a detection error of the position of the car 101 can be prevented.

In step S501, the position determination device 106 determines whether or not the magnet 107 detected in step S401 or step S405 (whether or not the floor on which the air pressure measurement is performed) is detected by the detection unit 302-1 for the N pole and the detection unit 302-2 for the S pole. When it is determined that the floor where the air pressure measurement is performed is detected, the position determination device 106 shifts the process to step S502, and when it is determined that the floor where the air pressure measurement is performed is not detected, the air pressure correction process is terminated.

In step S502, the position determination device 106 compares the initial air pressure measured in step S402 or step S405 with the current air pressure measured by the air pressure measurement unit 304, and determines whether or not the difference in air pressure is equal to or greater than a threshold value. The position determination device 106 moves the process to step S503 when it is determined that the difference in air pressure is equal to or greater than the threshold value, and ends the air pressure correction process when it is determined that the difference in air pressure is less than the threshold value.

In step S503, the position determination device 106 performs the air pressure calculation process shown in fig. 4 again, and corrects the air pressure for each floor used for the position detection of the car 101.

When the amount of change in the air pressure in the detection floor exceeds 50% of the difference in air pressure between the front and rear floors (for example, corresponding to 3 floors and 5 floors when detecting the middle floor in fig. 6) due to a change in the air temperature or the like, the measurement process of the position where the car 101 is used is affected. Therefore, a predetermined value (for example, 30%) smaller than the 50% is set as the threshold value. For example, when the air pressure of the detection layer is 1009.10 (hPa), the air pressure of the 3 layers is 1009.40 (hPa), the air pressure of the 5 layers is 1008.80 (hPa), and the predetermined value is 30%, the threshold value is 0.09 (hPa). In addition, when the threshold on the 3-layer side is different from the threshold on the 5-layer side, a smaller threshold is used.

According to the above processing, even if the air pressure changes due to environmental changes such as air temperature, the change in air pressure can be detected to correct the air pressure at each floor, and therefore the position of the car 101 can be accurately determined.

In addition, in the elevator system 100, since a predetermined floor on which the magnet 107 is provided can be reliably detected, a change in the air pressure at the same floor can be detected. Therefore, the air pressure of the floor for detecting the change in the air pressure can be reliably updated.

Fig. 6 is a schematic diagram showing a relationship between the air pressure calculated by the position determining device 106 and the actual air pressure.

Fig. 6 shows an example of a graph 601 connecting the barometric pressure at each floor calculated from the barometric pressure at the lowest floor, the air temperature, and the altitude at each floor, and a graph 602 showing the actual barometric pressure. As shown in fig. 6, since the calculated air pressure at each floor may deviate from the actual air pressure at each floor, it is preferable to correct the air pressure at each floor calculated based on the air pressure at the predetermined floor. For example, the air pressure may be measured at some or all of the floors other than the predetermined floor, and the air pressure at each floor calculated based on the air pressure at the predetermined floor may be corrected to the actual air pressure. For example, when the air pressure of another floor different from the predetermined floor is calculated, the air pressure of the other floor may be calculated based on the air pressure of the predetermined floor and the air pressure of the other floor, and the air pressure of each floor calculated based on the air pressure of the predetermined floor may be corrected.

Next, a process for detecting an abnormality of an elevator (abnormality detection process) will be described with reference to a flowchart shown in fig. 7.

Fig. 7 is a diagram showing an example of a flowchart of the abnormality detection process. The abnormality detection process is performed at a predetermined timing (for example, periodically at a pre-specified time).

In step S701, the position determination device 106 measures the air pressure by the air pressure measurement unit 304.

In step S702, the position determining device 106 calculates the height of the car 101 based on the measured air pressure. For example, the position determination device 106 calculates the altitude corresponding to the measured barometric pressure in the straight line calculated in step S407. In addition, the position determination device 106 may also calculate the position of the car 101 within the hoistway (e.g., the height from the floor of the hoistway) based on the altitude.

In step S703, the position determining device 106 stores the calculated height of the car 101 in the memory 320.

In step S704, the position determining device 106 determines whether the car 101 passes through a predetermined range. The position determination device 106 shifts the process to step S705 when it is determined that the car 101 has passed through the predetermined range, and ends the abnormality detection process when it is determined that the car 101 has not passed through the predetermined range.

The position determination device 106 determines whether or not a predetermined range has been passed based on information indicating a predetermined range of heights. For example, in the memory 320, information indicating a predetermined height range (an upper limit height and a lower limit height) is stored for each floor. The magnets 107 on each floor are included in each range of predetermined heights. In this case, the position determination device 106 determines that the predetermined range is passed when the height of the car 101 exceeds the upper limit during the ascent of the car 101, and determines that the predetermined range is passed when the height of the car 101 falls below the lower limit during the descent of the car 101.

In step S705, the position determination device 106 determines whether or not the magnet 107 is detected. When it is determined that the magnet 107 is detected, the position determination device 106 ends the abnormality determination processing, and when it is determined that the magnet 107 is not detected, the processing proceeds to step S706.

Although not shown, when the magnet 107 is detected by the detection unit 302 at an appropriate timing up to step S704, the position determination device 106 stores information (detection information) indicating that the magnet 107 is detected in the memory 320, and deletes the detection information at an appropriate timing when the determination at step S705 ends.

In step S706, the position determination device 106 outputs information related to an abnormality of the elevator. For example, the position determination device 106 outputs the presence of an abnormality (failure state) of the magnet 107 or the detection unit 302 to the outside (a control device of an elevator, a terminal of a control center, a terminal of a maintenance person, or the like) via the communication interface 330.

In this way, in the abnormality detection process, regardless of the fact that the position determination device 106 detects that the car 101 passes the height at which the magnet 107 is considered to be provided, if the magnet 107 cannot be detected, it is determined that the magnet 107 is detached, the detection unit 302 is out of order, or the like, and the fault state is notified to the outside via the communication interface.

According to the present embodiment, for example, by providing a magnet at a floor that is a reference for detecting the position of the car and detecting the provided magnet by a magnetic sensor provided in the car, the car position can be easily detected even when the car is recovered from a power failure state. In addition, for example, the change in the air pressure caused by the environmental change such as the air temperature is detected, and the air pressure of each floor required for the detection of the floor can be easily updated, so that erroneous detection of the car position can be prevented.

(2) Notes attached

The above-described embodiments include, for example, the following.

In the above-described embodiment, the case where the present invention is applied to an elevator system has been described, but the present invention is not limited to this, and can be widely applied to other various systems, apparatuses, methods, and programs.

In the above embodiment, the case where the position specifying device 106 is provided on the car of the car 101 has been described, but the present invention is not limited to this, and the position specifying device 106 may be provided under the car of the car 101 or may be provided on the side surface of the car 101. In this case, the installation position of the magnet 107 is set at a position corresponding to the position determination device 106.

In the above embodiment, the case where the position determining device 106 includes the storage unit 301 and the air temperature measuring unit 303 has been described, but the present invention is not limited to this, and the position determining device 106 may not include the storage unit 301 and the air temperature measuring unit 303. In this case, the storage unit 301 and the air temperature measurement unit 303 are provided at any place and are provided so as to be able to communicate with the position specification device 106. For example, the storage unit 301 may be provided in a control center. For example, the air temperature measuring unit 303 may be provided in the elevating path.

In the above-described embodiment, the description was made of the case where the floor is determined by the combination of the detected magnets 107 of the N pole and the detected magnets 107 of the S pole, but the present invention is not limited to this, and the floor may be determined by the number of the detected magnets 107, or the floor may be determined by the arrangement of the detected magnets 107. The magnets 107 may be arranged such that the magnets 107 are provided only on the left side in the uppermost layer, on both sides in the intermediate layer, and only on the right side in the lowermost layer.

In the above-described embodiment, the case where it is determined in step S401, step S405, and step S501 whether or not the detecting unit 302 detects the magnet 107 has been described, but the present invention is not limited to this, and it may be determined whether or not the detecting unit 302 detects the magnet 107 for a predetermined time and/or with a predetermined strength (for example, whether or not the car 101 is stopped at the detection floor).

In the above description, information such as a program, a table, and a file for realizing each function can be stored in a memory, a hard disk, a storage device such as an SSD (solid state drive), or a recording medium such as an IC card, an SD card, and a DVD.

The above-described embodiment has, for example, the following characteristic configuration.

An elevator system (e.g., elevator system 100) provided with an identification body (e.g., magnet 107) provided in a hoistway of an elevator and a detection unit (e.g., detection unit 302) provided in a car (e.g., car 101) of the elevator and detecting the identification body, the elevator system comprising: a storage unit (e.g., storage unit 301) for storing the floor height (altitude, height in a hoistway calculated based on altitude, etc.) of the elevator; an air pressure measuring unit (for example, air pressure measuring unit 304) provided in the car, the air pressure measuring unit measuring an air pressure at a height of the identification body detected by the detecting unit (for example, refer to step S402); a calculating unit (e.g., calculating unit 321) that calculates the air pressure at each floor of the elevator based on the air pressure at the height of the identification body and the height of the floor stored in the storage unit (e.g., see step S403); and a determining unit (e.g., determining unit 322) that obtains the position of the car based on the air pressure of each floor calculated by the calculating unit and the air pressure measured by the air pressure measuring unit (e.g., refer to step S404).

In the above configuration, when the identifier provided in the elevating path is detected, the air pressure at the height of the identifier is measured, and the air pressure at each floor is calculated based on the measured air pressure and the height of the floor stored in the storage unit. According to the above configuration, the identification body is detected, and the position of the car can be determined by comparing the measured air pressure with the calculated air pressure at each floor, so that the position of the car can be easily detected when the elevator is recovered from a power failure state, for example.

For example, the calculation unit calculates the air pressure at each floor of the elevator using an altitude measurement formula indicating a relationship among the air pressure, the air temperature, and the altitude, based on the air pressure at the predetermined floor, the air temperature in the elevator, and the altitude stored in the storage unit. The air temperature in the elevator may be measured by an air temperature measuring unit provided in the car, may be measured by an air temperature measuring unit provided in a hoistway of the elevator, or may be measured by an air temperature measuring unit provided in each floor of the elevator.

The position of the car may be determined as a floor where the car is located (for example, stopped), or may be determined as an altitude where the car is located. Alternatively, a map of the air pressure of each floor calculated by connection or a map of the air pressure of 2 floors measured by connection may be generated to determine the position (current position) of the car 101 corresponding to the measured air pressure.

The calculation unit calculates the air pressure of the sea surface using an altitude measurement formula indicating the relationship among the air pressure, the air temperature, and the altitude, for example, based on the air pressure of the predetermined floor, the air temperature in the elevator, and the altitude stored in the storage unit, and calculates the air pressure of each floor using the altitude measurement formula based on the calculated air pressure of the sea surface, the air temperature around the car, and the altitude stored in the storage unit.

The identification body is provided near a landing in a hoistway of a floor where the possibility of passing the car is high, and when the detection unit detects the identification body, the calculation unit calculates an air pressure corresponding to the height of each floor stored in the storage unit based on the air pressure measured by the air pressure measurement unit, and updates the air pressure of each floor stored in the storage unit (for example, refer to step S503).

In the above-described configuration, the identification body is provided in the vicinity of a landing in the elevator shaft of a floor where the possibility of passing the car is high, so that the air pressure stored in the storage unit can be updated for each floor according to environmental changes such as air temperature.

When the air pressure measuring unit detects the other identifier on a different floor than the predetermined floor, the air pressure measuring unit measures the air pressure around the car (see, for example, step S406), and the calculating unit corrects the air pressure on the different floor, which is calculated when the predetermined floor is detected, to the air pressure measured by the air pressure measuring unit when the different floor is detected (see, for example, step S406).

In the above configuration, when the other identifier provided on the other floor is detected, the air pressure on the other floor is measured, and the air pressure on the other floor calculated when the air pressure on the predetermined floor is detected is updated to the air pressure actually measured, so that the position of the car can be more accurately determined.

The identification body may be provided on a plurality of floors in addition to other floors. In this case, since the air pressures at the plurality of floors are updated to the actually measured air pressures, the position of the car can be more accurately determined.

The air pressure at the other floor may be corrected by the air pressure at the predetermined floor and the air pressure at the other floor. In this case, since the accuracy of the air pressure at the other floor is improved, the position of the car can be more accurately determined.

The identification body is a magnet, and has a polarity different from that of the place where the identification body is installed (for example, see fig. 2).

In the above configuration, the identification body is a magnet, and the place where the identification body is provided is identified by the polarity of the magnet, so that the identification body can be easily provided.

The present invention is provided with a communication interface (for example, a communication interface 330 (for example, see fig. 7)) that outputs an abnormality to a recognition object provided in a predetermined height range or the detection unit when the detection unit does not detect the recognition object within the height range.

In the above configuration, when an abnormality of the identification body or the detection unit is detected, the abnormality is output to the identification body or the detection unit, and therefore, for example, a maintenance person can quickly and appropriately grasp the cause of the abnormality, and the time taken to respond to the abnormality can be reduced.

The above-described structure may be modified, replaced, combined, or omitted as appropriate within the scope of the present invention.

Claims (4)

1. An elevator system comprising a magnet provided in a hoistway of an elevator and a detecting unit provided in a car of the elevator and detecting the magnet,

the elevator system is provided with:

a storage unit that stores the height of the floor of the elevator;

an air pressure measuring unit that measures an air pressure at a height of the magnet detected by the detecting unit, the air pressure measuring unit being provided in the car;

a calculation unit that calculates the air pressure at each floor of the elevator from the air pressure at the height of the magnet and the height of the floor stored in the storage unit;

a determining unit that obtains a position of the car based on the air pressure of each floor calculated by the calculating unit and the air pressure measured by the air pressure measuring unit; and

a communication interface is provided for the communication of the communication medium,

determining whether or not the car passes through a predetermined range based on information indicating a range including a predetermined height of the magnet and the position of the car determined by the determining unit,

when it is determined that the car passes through the predetermined range, it is determined whether the detecting unit detects the magnet within a predetermined height range,

when the detecting unit does not detect the magnet within the predetermined height range, the communication interface outputs an abnormality that the magnet disposed within the height range is detached,

the magnets are arranged on three layers of the uppermost layer, the middle layer and the lowermost layer, the polarities of the magnets are different from those of the magnets corresponding to the arranged layers,

the detection unit is composed of a detection unit for an N pole and a detection unit for an S pole.

2. An elevator system according to claim 1, characterized in that,

the calculation unit detects which layer of the uppermost layer, the intermediate layer, and the lowermost layer the car is located on based on information from the detection unit for the N pole and the detection unit for the S pole, and stores the air pressure detected by the air pressure measurement unit in the storage unit in association with the detection layer, calculates the air pressure corresponding to the height of each floor based on the air pressure corresponding to the detection layer and the air pressure corresponding to a different detection layer in the past, and updates the air pressure of each floor stored in the storage unit.

3. An elevator system according to claim 1, characterized in that,

the air pressure measuring unit stores the current air pressure in the storage unit in association with the detection layer, and calculates the air pressure corresponding to the height of each floor from the air pressure corresponding to the detection layer and the air pressure corresponding to a different detection layer in the past, when the air pressure difference between the initial air pressure measured for the detection layer and the current air pressure measured for the detection layer is equal to or greater than a threshold value.

4. A car position determining method for determining the position of a car based on the detection of a magnet provided in a hoistway of an elevator by a detection unit provided in the car of the elevator, characterized in that,

the car position determining method comprises the following steps:

an air pressure measuring unit provided in the car for measuring the air pressure at the height of the magnet detected by the detecting unit;

the position determining device calculates the air pressure of each floor of the elevator based on the air pressure of the height of the magnet and the height of the floor stored in the storage part;

the position determining device obtains the position of the car based on the calculated air pressure of each floor and the air pressure measured by the air pressure measuring unit;

the position determination device determines whether or not the car passes through a predetermined range based on information indicating a range including a predetermined height of the magnet and the determined position of the car;

when the position determining device determines that the car passes through the predetermined range, determining whether the detecting unit detects the magnet within a predetermined height range; and

when the detecting unit does not detect the magnet within the predetermined height range, the position determining device outputs an abnormality that the magnet disposed within the height range falls off through a communication interface of the position determining device,

the magnets are arranged on three layers of the uppermost layer, the middle layer and the lowermost layer, the polarities of the magnets are different from those of the magnets corresponding to the arranged layers,

the detection unit is composed of a detection unit for an N pole and a detection unit for an S pole.

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