Position identification device and detection system for absolute position detection of elevator car

Abstract

The utility model relates to a position identification device and a detection system for detecting the absolute position of an elevator car, belongs to the technical field of elevator equipment, and solves the problems of low precision, high environmental requirements, high cost and the like in the conventional method for detecting the absolute position of the elevator car. The detection system comprises a position identification device and an identification recognition device, the position identification device comprises magnetic strips installed in an elevator shaft in a segmented mode, and an upper door area, an upper floor absolute coding area, a flat layer position induction area, a lower floor absolute coding area and a lower door area are sequentially distributed on each magnetic strip. The identification recognition device reads sensing data of the Hall sensors corresponding to all the areas of the magnetic strip and outputs corresponding signals to an elevator control system. According to the utility model, the overall length of the magnetic strip is shortened, the cost is low, the absolute position detector is suitable for absolute position detection of elevator cars in high-rise and super high-rise buildings, the service life is long, the detection precision is high, the induction distance is large, the anti-interference performance is strong, and the absolute position detector is not easily influenced by ambient light intensity, cleanliness and magnetic field.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator equipment, in particular to a position identification device and a detection system for absolute position detection of an elevator car. Background Art

[0002] As the main means of vertical transportation in buildings, elevators are more important, especially for high-rise and super-high-rise buildings, but at the same time, higher requirements are placed on the safe, fast, efficient and stable operation of elevators. In order to ensure the normal leveling control of the elevator in the shaft and realize the emergency braking protection of the elevator in abnormal conditions, the elevator control system needs to quickly and accurately detect the absolute position of the elevator car.

[0003] At present, the methods for detecting the absolute position of the elevator car mainly include mechanical motion detection method and electronic trigger detection method. The principle of the mechanical motion detection method is to install a rotary encoder on the main machine side, use the rotary encoder to detect the movement distance of the main machine traction wheel, and regard the movement distance of the traction wheel as the movement distance of the wire rope, and then calculate the absolute position of the car according to the movement distance of the traction wheel. However, due to the slippage between the traction wheel and the wire rope, the absolute position of the car calculated by this method has a large error. If other position sensors are used to correct the car position, the overall structure of the detection system will be complicated and the cost will be high.

[0004] The electronic trigger detection method effectively solves the drawbacks of the mechanical motion detection method and improves the accuracy and reliability of the elevator car absolute position detection. The electronic trigger detection method mainly includes the detection method using photoelectric switches or grating rulers (for example, the invention patent with the publication number CN106698119A discloses "a smart elevator photoelectric switch based on QR code floor information"), the detection method using magnetic strips or magnetic grating rulers (for example, the invention patent with the publication number CN114715745A discloses "hoistway magnetic strip tensioning device and elevator car position detection device") and the detection method using electromagnetic radio frequency signals (for example, the invention patent with the publication number CN101381042A discloses "an elevator positioning method based on RFID technology"), but these methods also have certain limitations to varying degrees. The detection method using photoelectric switches or grating rulers has high requirements on the ambient light intensity and the cleanliness of the environment, and has poor anti-interference performance. Therefore, it cannot be applied to different types of elevators, especially sightseeing elevators, and has weak versatility. The detection method using magnetic strips or magnetic scales requires that a whole magnetic strip or magnetic scale be installed vertically in the elevator shaft in advance, and the magnetic strip or magnetic scale needs to be kept in a tensioned state during the operation of the elevator to ensure the accuracy of sensor data collection. However, after long-term operation or interference from the outside world, the magnetic scale may become loose, offset, or bent, resulting in reduced accuracy in the absolute position detection of the elevator. Especially for elevators in high-rise and super-high-rise buildings, the magnetic strip or magnetic scale is too long and is more likely to become loose, and the magnetic strip or magnetic scale needs to be arranged according to the height of the building, resulting in a longer length of the required magnetic strip or magnetic scale and higher costs. The detection method using electromagnetic radio frequency signals uses wireless radio frequency identification technology, so it cannot be used in strong magnetic environments, is susceptible to electromagnetic interference or even failure, and affects the accuracy and safety of the absolute position detection of the elevator car. Utility Model Content

[0005] In view of the problems of low accuracy, high environmental requirements and high cost in the current elevator car absolute position detection method, the utility model provides a position identification device for absolute position detection of an elevator car and a detection system including the position identification device.

[0006] In order to solve the above problems, the utility model adopts the following technical solutions:

[0007] A position identification device for detecting the absolute position of an elevator car, each of the position identification devices is respectively arranged at an elevator leveling position corresponding to each floor in an elevator shaft, each of the position identification devices comprises a fixing component and at least one magnetic strip installed on the fixing component, and an upper door area, an upper floor absolute coding area, a leveling position sensing area, a lower floor absolute coding area and a lower door area are sequentially distributed on the magnetic strip;

[0008] The leveling position sensing area includes at least one pair of leveling position sensing magnetic poles with opposite magnetic properties;

[0009] The positions of the magnetic poles included in the upper floor absolute coding area and the magnetic poles included in the lower floor absolute coding area are symmetrical about the flat floor position sensing area, the magnetic properties of the magnetic poles are symmetrically opposite to the flat floor position sensing area, and the magnetic pole code of the upper floor absolute coding area or the lower floor absolute coding area is unique, the magnetic pole code uniquely corresponds to the floor where the position identification device is located, and the first magnetic pole of the upper floor absolute coding area close to the upper door area and the first magnetic pole of the lower floor absolute coding area close to the lower door area are both magnetic poles used for performing parity check of floor absolute coding;

[0010] The upper door area and the lower door area each include at least one door area magnetic pole, and the magnetic properties of the door area magnetic poles of the upper door area and the lower door area are opposite.

[0011] The position identification device for absolute position detection of the elevator car proposed by the utility model can be installed in sections in the elevator shaft, which greatly shortens the overall length of the magnetic strip used. Therefore, it has the advantages of lower cost and is more suitable for absolute position detection of elevator cars in high-rise and super-high-rise buildings. At the same time, it avoids the problems of looseness, deviation, bending, etc. that may occur when the magnetic strip is installed as a whole in high-rise and super-high-rise buildings.

[0012] At the same time, the utility model also proposes a detection system for detecting the absolute position of an elevator car, the system comprising an identification recognition device fixed on the elevator car and the position identification device as described above;

[0013] The identification device comprises a housing, a microprocessor, a CAN communication module and a set of sensor components, wherein the set of sensor components comprises a plurality of Hall sensors, the housing is fixedly connected to the elevator car, each of the Hall sensors is fixed in parallel on the side of the housing facing the position identification device, the distance between each of the Hall sensors and the magnetic strip is less than or equal to the sensing distance, the number of the Hall sensors is the same as the number of all the magnetic poles included in the position identification device, and the distance between any two adjacent Hall sensors is equal to the spacing between any two adjacent magnetic poles in the position identification device;

[0014] The microprocessor reads the sensing data of each of the Hall sensors in sequence according to the running direction of the elevator car. After the Hall sensor corresponding to the upper door area or the lower door area is triggered for the first time, the microprocessor outputs the corresponding door area output signal to the elevator control system through the CAN communication module; if the Hall sensor corresponding to the upper door area is triggered, the microprocessor reads the sensing data of the Hall sensor corresponding to the absolute coding area of ​​the lower floor, and vice versa, reads the sensing data of the Hall sensor corresponding to the absolute coding area of ​​the upper floor, forms a binary code, and performs a parity check on the binary code, performs data search in a pre-established database according to the binary code that passes the parity check, determines the floor position information corresponding to the binary code, and then sends the floor position information to the elevator control system through the CAN communication module; after the microprocessor reads the sensing data of the Hall sensor corresponding to the absolute coding area of ​​the lower floor or the absolute coding area of ​​the upper floor, it reads the sensing data of the Hall sensor corresponding to the leveling position sensing area, and outputs the leveling information to the elevator control system through the CAN communication module.

[0015] The detection system for detecting the absolute position of the elevator car proposed in the utility model uses a microprocessor to collect the sensor data of each Hall sensor in the identification device in real time, and according to the triggering situation of the Hall sensor corresponding to the upper door area or the lower door area, outputs an independent door area output signal to the elevator control system, and selects to collect the sensor data of the Hall sensor corresponding to the corresponding lower floor absolute coding area or the upper floor absolute coding area to form a binary code, and then looks up the table in the database according to the binary code to find the matching floor position information, and finally sends the floor position information to the elevator control system through the CAN communication module for use by the elevator control system. The system can not only output a separate door area output signal to the elevator control system, but also has a small magnetic pole spacing on the magnetic strip and high position detection accuracy; at the same time, since a non-contact magnetic field is used between the identification device and the position identification device, the service life of the position identification device and the identification device can be effectively extended; the identification device uses a Hall sensor for sensing, which has the advantages of a large sensing distance and strong anti-interference, and is not easily affected by ambient light intensity, cleanliness and magnetic field. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the installation positions of the position marking device and the marking identification device in the embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the magnetic strip in the embodiment of the utility model;

[0018] Figure 3A schematic diagram of the position relationship between the position marking device and the identification recognition device when the Hall sensor corresponding to the upper door area is triggered for the first time;

[0019] Figure 4 A schematic diagram of the position relationship between the position identification device and the identification recognition device when the microprocessor reads the Hall sensor corresponding to the absolute coding area of ​​the lower floor;

[0020] Figure 5 This is a schematic diagram of the position relationship between the position identification device and the identification recognition device when the microprocessor reads the Hall sensor corresponding to the leveling position sensing area.

[0021] Explanation of the reference numerals: 100, position identification device; 110, magnetic strip; 111, upper door area; 112, upper floor absolute coding area; 113, level position sensing area; 114, lower floor absolute coding area; 115, lower door area; 200, elevator shaft; 300, elevator car; 400, identification device. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0023] This embodiment provides a position identification device for detecting the absolute position of an elevator car. Figure 1 As shown, each position identification device 100 is fixedly installed at the elevator leveling position corresponding to the floors N, N+1, N+2, etc. in the elevator shaft 200, wherein the elevator leveling position corresponding to each floor is known. The position identification device 100 is used to cooperate with the identification recognition device 400 or the existing magnetic stripe decoder, and the absolute position of the elevator car 300 is obtained after decoding by the identification recognition device 400 or the magnetic stripe decoder.

[0024] Each position identification device 100 includes a fixing component and at least one magnetic strip 110 mounted on the fixing component, wherein the fixing component is used to be fixed to the elevator shaft 200, for example, by bolts or screws, and is also used to provide an installation basis for the magnetic strip 110. The fixing component in this embodiment can be implemented by an existing fixing structure, as long as the magnetic strip 110 can be stably installed and fixed to the elevator shaft 200, the specific structure of the fixing component is not limited, and those skilled in the art can select it according to actual needs.

[0025] like Figure 2 As shown, the magnetic stripe 110 is composed of a plurality of magnetic poles, and the magnetic stripe 110 is sequentially provided with an upper door area 111, an upper floor absolute coding area 112, a flat position sensing area 113, a lower floor absolute coding area 114 and a lower door area 115.

[0026] The leveling position sensing area 113 is located in the middle of the entire magnetic strip 110, and includes at least one pair of leveling position sensing magnetic poles with opposite magnetic properties. When the leveling position sensing area 113 includes more than two pairs of leveling position sensing magnetic poles, the positions of each pair of leveling position sensing magnetic poles are symmetrical about the center of the leveling position sensing area 113, and the magnetic properties of the magnetic poles are symmetrical and opposite about the center of the leveling position sensing area 113. Figure 2 In the example, the leveling position sensing area 113 includes two pairs of leveling position sensing magnetic poles. The positions of the first pair of leveling position sensing magnetic poles are symmetrical about the center of the leveling position sensing area 113, and the magnetic properties of the first pair of leveling position sensing magnetic poles are symmetrically opposite to the center of the leveling position sensing area 113; the second pair of leveling position sensing magnetic poles are located outside the first pair of leveling position sensing magnetic poles and are the same as the first pair of leveling position sensing magnetic poles. The positions of the second pair of leveling position sensing magnetic poles are symmetrical about the center of the leveling position sensing area 113, and the magnetic properties of the second pair of leveling position sensing magnetic poles are symmetrically opposite to the center of the leveling position sensing area 113.

[0027] The upper floor absolute coding area 112 and the lower floor absolute coding area 114 are mirror-symmetrical about the leveling position sensing area 113, and the number of magnetic poles included in the two is the same. Specifically, the positions of the magnetic poles included in the upper floor absolute coding area 112 and the magnetic poles included in the lower floor absolute coding area 114 are symmetrical about the leveling position sensing area 113, and the magnetic properties of the magnetic poles are symmetrically opposite to the leveling position sensing area 113, which is also called the inverse code, and the magnetic pole code of the upper floor absolute coding area 112 or the lower floor absolute coding area 114 is unique, that is, the arrangement and combination of the magnetic pole polarity in the upper floor absolute coding area 112 or the lower floor absolute coding area 114 is unique in the elevator shaft 200, and the magnetic pole code uniquely corresponds to the number of floors where the position identification device 100 is located, so the absolute code corresponding to the upper floor absolute coding area 112 or the lower floor absolute coding area 114 can be used to represent the number of floors. The first magnetic pole of the upper floor absolute coding area 112 near the upper door area 111 and the first magnetic pole of the lower floor absolute coding area 114 near the lower door area 115 are both magnetic poles used for performing parity check of floor absolute coding. It should be noted that, Figure 2 Only one magnetic pole encoding method or magnetic pole polarity arrangement and combination method of the upper floor absolute encoding area 112 and the lower floor absolute encoding area 114 is shown, and there are other encoding methods or combinations that are not shown.

[0028] Furthermore, the number of magnetic poles included in the upper floor absolute coding area 112 and the lower floor absolute coding area 114 in this embodiment ranges from 1 to 32, and the specific number of magnetic poles can be reasonably selected by those skilled in the art according to the number of floors. For example, the number of magnetic poles included in the upper floor absolute coding area 112 and the lower floor absolute coding area 114 is set to 11, that is, the upper floor absolute coding area 112 and the lower floor absolute coding area 114 respectively include 11 absolute code channels, of which 10 magnetic poles are used for floor absolute coding, and the remaining 1 magnetic pole is used for parity check of floor absolute coding.

[0029] Furthermore, in this embodiment, the spacing between adjacent magnetic poles in the upper floor absolute coding area 112 and the lower floor absolute coding area 114 ranges from 8 mm to 20 mm, preferably 10 mm.

[0030] The upper gate region 111 and the lower gate region 115 each include at least one gate region magnetic pole, and the magnetic properties of the gate region magnetic poles of the upper gate region 111 and the lower gate region 115 are opposite. Figure 2 Taking the example that both the upper door area 111 and the lower door area 115 include two door area magnetic poles, the door area magnetic poles of the upper door area 111 are set to N poles, and the door area magnetic poles of the lower door area 115 are set to S poles. The opposite setting can also be performed, that is, the door area magnetic poles of the upper door area 111 are set to S poles, and the door area magnetic poles of the lower door area 115 are set to N poles.

[0031] The position identification device for absolute position detection of the elevator car proposed in this embodiment can be installed in sections in the elevator shaft. There is no need to cover the entire elevator shaft with magnetic strips, which greatly shortens the overall length of the magnetic strips used. Therefore, the cost is lower and it is more suitable for absolute position detection of elevator cars in high-rise and super-high-rise buildings. At the same time, this segmented installation method effectively avoids the problems of looseness, offset, bending, etc. that may occur during the overall installation of magnetic strips in high-rise and super-high-rise buildings, thereby ensuring the accuracy of absolute position detection of the elevator car and reducing the maintenance cost after the installation of the magnetic strips.

[0032] The utility model also provides a detection system for detecting the absolute position of an elevator car, which includes an identification device 400 fixed on the elevator car 300, and also includes the position identification device 100 installed in the elevator shaft 200 as described in the above embodiment. The car is a car body component used by the elevator to carry passengers or goods and other loads. It is generally composed of main components such as a car bottom, a car wall, a car top, and a car door. The identification device 400 can be fixed on the car top or the car bottom of the elevator car 300. Figure 1The installation position of the identification device 400 is shown by taking the example of fixing the identification device 400 on the roof of the elevator car 300. For those skilled in the art, it is entirely possible to fix the identification device 400 on the bottom of the elevator car 300 as an alternative, which will not be described here.

[0033] The identification device 400 includes a housing, a microprocessor, a CAN communication module and a set of sensor components, wherein the set of sensor components includes a plurality of Hall sensors evenly distributed at equal intervals. The microprocessor, the CAN communication module and the set of sensor components are all mounted on the housing, which is fixedly connected to the elevator car 300. Each Hall sensor is fixed in parallel on the side of the housing facing the position identification device 100, such as Figure 3-Figure 5 As shown, the distance between each Hall sensor and the magnetic stripe 110 is greater than zero and less than or equal to the sensing distance (for example, the sensing distance is 30 mm), and the number of Hall sensors is the same as the number of all magnetic poles included in the position identification device 100. The Hall sensors on the identification device 400 correspond one-to-one to the magnetic poles on the magnetic stripe, and the distance between any two adjacent Hall sensors is equal to the spacing between any two adjacent magnetic poles in the position identification device 100 to ensure the accuracy of sensor data acquisition.

[0034] Each Hall sensor is connected to a microprocessor, which is connected to a CAN communication module, which is connected to an elevator control system via a CAN bus. The microprocessor includes a pre-established database, which is used to store the binary codes corresponding to the upper floor absolute coding area 112 and the lower floor absolute coding area 114 of each position identification device 100 and the floor location information of the position identification device 100 after each position identification device 100 is installed at a corresponding position in the elevator shaft 200. The database in this embodiment can be implemented using a MySQL database or the like.

[0035] The microprocessor reads the sensing data of each Hall sensor in sequence according to the running direction of the elevator car 300. After the Hall sensor corresponding to the upper door area 111 or the lower door area 115 is triggered for the first time, the microprocessor outputs the corresponding door area output signal to the elevator control system through the CAN communication module for use by the elevator control system. At the same time, the microprocessor can determine the running direction of the elevator car 300 according to whether the Hall sensor corresponding to the upper door area 111 or the lower door area 115 is triggered: when the position identification device 100 is installed in the elevator shaft 200 and the upper door area 111 is located at the top, when the Hall sensor corresponding to the upper door area 111 is triggered, it indicates that the elevator car 300 is going downward, such as Figure 3On the contrary, when the Hall sensor corresponding to the lower door area 115 is triggered, it indicates that the elevator car 300 is moving upward. It should be noted that the Hall sensor corresponding to the upper door area 111 or the lower door area 115 is triggered for the first time in this embodiment for any one of the position identification devices 100, and does not refer to the first triggering of all the position identification devices 100 installed in the elevator shaft 200.

[0036] like Figure 4 As shown, if the Hall sensor corresponding to the upper door area 111 is triggered, the microprocessor reads the sensor data of the Hall sensor corresponding to the absolute coding area 114 of the lower floor in sequence. Conversely, if the Hall sensor corresponding to the lower door area 115 is triggered, the microprocessor reads the sensor data of the Hall sensor corresponding to the absolute coding area 112 of the upper floor in sequence, and then forms a binary code according to the sensor data of the read Hall sensor, and performs a parity check on the binary code. If the parity check passes, data search and matching are performed in the database according to the binary code until the floor position information corresponding to the binary code is found in the database. The floor position information is the absolute position of the current elevator car, and then the microprocessor sends the floor position information to the elevator control system through the CAN communication module for use by the elevator control system; if the parity check fails, it means that the binary code formed by the sensor data of the Hall sensor read is inaccurate. At this time, the microprocessor generates an alarm signal and sends the alarm signal to the elevator control system through the CAN communication module.

[0037] like Figure 5 As shown, after the microprocessor reads the sensor data of the Hall sensor corresponding to the absolute coding area of ​​the lower floor or the absolute coding area of ​​the upper floor, it reads the sensor data of all the Hall sensors corresponding to the leveling position sensing area 113 in sequence to obtain the leveling information. The microprocessor outputs the leveling information to the elevator control system through the CAN communication module for the elevator control system to use for leveling operations.

[0038] Furthermore, the Hall sensor corresponding to the leveling position sensing area 113 adopts an analog Hall sensor, and the Hall sensors corresponding to the upper door area 111, the upper floor absolute coding area 112, the lower floor absolute coding area 114 and the lower door area 115 adopt a switching Hall sensor or an analog Hall sensor.

[0039] Figure 3-Figure 5 The identification device 400 shown is a single-channel structure. When the position identification device 100 includes two magnetic stripes at the same time, the identification device 400 can adopt a dual-channel structure to further improve the reliability of the detection system. When the identification device 400 adopts a dual-channel structure, the identification device 400 includes two microprocessors, two CAN communication modules and two sets of sensor components.

[0040] It should be pointed out that the position identification device 100 and identification recognition device 400 proposed in this application are not only applicable to traditional single-car elevators, but also to absolute position detection of double-car elevators, twin elevators, cableless multi-car elevators or other forms of elevator cars.

[0041] The detection system for detecting the absolute position of the elevator car proposed in this embodiment uses a microprocessor to collect the sensor data of each Hall sensor in the identification device in real time, and according to the triggering situation of the Hall sensor corresponding to the upper door area or the lower door area, outputs an independent door area output signal to the elevator control system, and selects to collect the sensor data of the Hall sensor corresponding to the corresponding lower floor absolute coding area or upper floor absolute coding area to form a binary code, and then searches in the database according to the binary code to find the matching floor position information, and finally sends the floor position information to the elevator control system through the CAN communication module for use by the elevator control system. The system can not only output a separate door area output signal to the elevator control system, but also has a small magnetic pole spacing on the magnetic strip and high position detection accuracy; at the same time, since a non-contact magnetic field is used between the identification device and the position identification device, the service life of the position identification device and the identification device can be effectively extended; the identification device uses a Hall sensor for sensing, which has the advantages of a large sensing distance and strong anti-interference, and is not easily affected by ambient light intensity, cleanliness and magnetic field.

[0042] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A position identification device for detecting the absolute position of an elevator car, characterized in that: Each of the position identification devices (100) is respectively arranged at an elevator leveling position corresponding to each floor in the elevator shaft (200), and each of the position identification devices (100) comprises a fixing component and at least one magnetic strip (110) installed on the fixing component, and an upper door area (111), an upper floor absolute coding area (112), a leveling position sensing area (113), a lower floor absolute coding area (114) and a lower door area (115) are sequentially distributed on the magnetic strip (110); The flat position sensing area (113) comprises at least one pair of flat position sensing magnetic poles with opposite magnetic properties; The positions of the magnetic poles included in the upper floor absolute coding area (112) and the magnetic poles included in the lower floor absolute coding area (114) are symmetrical with respect to the flat floor position sensing area (113), the magnetic properties of the magnetic poles are symmetrically opposite to each other with respect to the flat floor position sensing area (113), and the magnetic pole codes of the upper floor absolute coding area (112) or the lower floor absolute coding area (114) are unique, the magnetic pole codes uniquely correspond to the floor where the position identification device (100) is located, and the first magnetic pole of the upper floor absolute coding area (112) close to the upper door area (111) and the first magnetic pole of the lower floor absolute coding area (114) close to the lower door area (115) are both magnetic poles used for performing parity check of floor absolute coding; The upper door area (111) and the lower door area (115) each include at least one door area magnetic pole, and the magnetic properties of the door area magnetic poles of the upper door area (111) and the lower door area (115) are opposite.

2. The position identification device for detecting the absolute position of an elevator car according to claim 1, characterized in that: When the leveling position sensing area (113) includes more than two pairs of leveling position sensing magnetic poles, the positions of each pair of leveling position sensing magnetic poles are symmetrical about the center of the leveling position sensing area (113), and the magnetic properties of the magnetic poles are symmetrically opposite about the center of the leveling position sensing area (113).

3. The position identification device for detecting the absolute position of an elevator car according to claim 1 or 2, characterized in that: The upper gate area (111) and the lower gate area (115) each include two gate area magnetic poles, the gate area magnetic poles of the upper gate area (111) are all N poles, and the gate area magnetic poles of the lower gate area (115) are all S poles, or the gate area magnetic poles of the upper gate area (111) are all S poles, and the gate area magnetic poles of the lower gate area (115) are all N poles.

4. The position identification device for detecting the absolute position of an elevator car according to claim 1 or 2, characterized in that: The number of magnetic poles included in the upper floor absolute encoding area (112) and the lower floor absolute encoding area (114) ranges from 1 to 32.

5. The position identification device for detecting the absolute position of an elevator car according to claim 1 or 2, characterized in that: The spacing between adjacent magnetic poles in the upper floor absolute encoding area (112) and the lower floor absolute encoding area (114) ranges from 8 mm to 20 mm.

6. A detection system for detecting the absolute position of an elevator car, characterized in that: It comprises an identification device (400) fixed on an elevator car (300) and a position identification device (100) according to any one of claims 1 to 5; The identification device (400) comprises a housing, a microprocessor, a CAN communication module and a set of sensor components, wherein the set of sensor components comprises a plurality of Hall sensors, the housing is fixedly connected to the elevator car (300), each of the Hall sensors is fixed in parallel on the side of the housing facing the position identification device (100), the distance between each of the Hall sensors and the magnetic strip (110) is less than or equal to the sensing distance, the number of the Hall sensors is the same as the number of all magnetic poles included in the position identification device (100), and the distance between any two adjacent Hall sensors is equal to the spacing between any two adjacent magnetic poles in the position identification device (100); The microprocessor reads the sensing data of each Hall sensor in sequence according to the running direction of the elevator car (300); after the Hall sensor corresponding to the upper door area (111) or the lower door area (115) is triggered for the first time, the microprocessor outputs the corresponding door area output signal to the elevator control system through the CAN communication module; if the Hall sensor corresponding to the upper door area (111) is triggered, the microprocessor reads the sensing data of the Hall sensor corresponding to the lower floor absolute coding area (114); conversely, the microprocessor reads the sensing data of the Hall sensor corresponding to the upper floor absolute coding area (112), forms a binary code, performs a parity check on the binary code, performs data search in a pre-established database according to the binary code that passes the parity check, determines the floor position information corresponding to the binary code, and then sends the floor position information to the elevator control system through the CAN communication module; After the microprocessor has read the sensing data of the Hall sensor corresponding to the lower floor absolute coding area (114) or the upper floor absolute coding area (112), it reads the sensing data of the Hall sensor corresponding to the leveling position sensing area (113), and outputs the leveling information to the elevator control system through the CAN communication module.

7. The detection system for detecting the absolute position of an elevator car according to claim 6, characterized in that: When the parity check is performed on the binary code, if the parity check fails, the microprocessor generates an alarm signal and sends the alarm signal to the elevator control system through the CAN communication module.

8. The detection system for detecting the absolute position of an elevator car according to claim 6 or 7, characterized in that: The Hall sensor corresponding to the leveling position sensing area (113) is an analog Hall sensor, and the Hall sensors corresponding to the upper door area (111), the upper floor absolute coding area (112), the lower floor absolute coding area (114) and the lower door area (115) are switch Hall sensors or analog Hall sensors.

9. The detection system for detecting the absolute position of an elevator car according to claim 6 or 7, characterized in that: The position identification device (100) comprises two magnetic strips (110) at the same time, the identification recognition device (400) adopts a dual-channel structure, and the identification recognition device (400) comprises two microprocessors, two CAN communication modules and two sets of sensor components.

10. The detection system for detecting the absolute position of an elevator car according to claim 6 or 7, characterized in that: The sensing distance is 30 mm.

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