Elevator car position detection system

Abstract

The application discloses an elevator car position detection system, comprising a processing unit, m detection bodies and n detected bodies; the distribution of the detection bodies and the detected bodies in the vertical direction is such that at least one detection body and one detected body are in a direct position when the elevator car is at any position; any detection point of each detected body has a unique mark in the vertical direction; the detection body detects the mark corresponding to the detection point on the detected body in the direct position and outputs the unique and non-repeated mark corresponding to the detected body to the unit. The application can realize the position detection of the elevator car at any position in the elevator shaft without laying the detected bodies in the elevator shaft by selecting appropriate detection bodies and detected bodies and reasonable installation positions, and can also realize the installation error of the detected bodies and the detection bodies, the position change in the subsequent use process and the fault diagnosis of the detection bodies.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of elevators, in particular to an elevator car position detection system. BACKGROUND

[0002] The real-time position of the elevator car is essential information for controlling the elevator. At present, the elevator car position detection methods mainly include direct method and indirect method. The indirect method mainly detects the rotation amount of the rotor in the drive motor and calculates the position of the elevator car according to the rotation amount. This detection method has the disadvantages of low detection accuracy (especially when slipping occurs, large lifting height, and large load variation in the car). The direct method directly detects the position of the elevator car, and the detection accuracy of the direct method is obviously improved compared with the indirect method.

[0003] At present, the direct method usually uses a reading head arranged on the elevator car to read the code information on the belt-shaped body laid in the entire elevator shaft to directly detect the position of the elevator car. For example, refer to CN201680066348.8, CN201210215927.8, CN200510089578.X, etc. In order to detect the position of the elevator car at any position in the elevator shaft, these prior art technologies require that the belt-shaped body (such as a magnetic ruler) with code information be laid from the top of the elevator shaft to the bottom of the elevator shaft, so that the reading head arranged on the elevator car can detect the code information on the belt-shaped body in real time, thereby detecting the current position of the elevator car. Such a requirement will cause the code ruler to have a limited maximum length due to the coding problem, which cannot be solved in large lifting height applications. Even if the coding problem is solved and the length of the code ruler meets the lifting height, there are still problems such as cost increase, magnetic ruler shaking, mutual friction between the magnetic ruler and the reading head, and detection accuracy affected by thermal expansion and contraction of the magnetic ruler.

[0004] Therefore, how to overcome the coding problem of the code ruler with too long length, the decrease in detection accuracy, and the increase in cost of the elevator car position detection technology scheme using the direct method has become a technical problem to be solved. SUMMARY

[0005] The technical problem to be solved by the present application is to provide an elevator car position detection system, which can solve the coding problem of the code ruler with too long length, the decrease in detection accuracy, and the increase in cost of the existing elevator car position detection technology scheme using the direct method.

[0006] In order to solve the above technical problem, the present application provides an elevator car position detection system, which comprises a processing unit, m detection bodies, and n detected bodies, m≥2, n≥2.

[0007] The detection body is set on the elevator car and moves up and down with the elevator car in the elevator shaft. The detected body is roughly long and vertically installed in the elevator shaft along its length.

[0008] The vertical distribution of the detector and the object being detected ensures that at any position of the elevator car, there is at least one detector and one object being detected facing each other. The facing position means that a certain detection point of the detector and the object being detected are at the same horizontal height in the vertical direction and the distance between them is less than a threshold.

[0009] Each detection point of the tested object has a unique identifier in the vertical direction. When the detection object is directly opposite any detection point of the tested object, the detection object detects the identifier corresponding to the detection point on the tested object that is directly opposite it and outputs a unique and non-repeating identifier corresponding to the tested object to the processing unit.

[0010] The processing unit is used to process the identifier output by the detection body;

[0011] The positions of the detector and the detected object satisfy the following conditions:

[0012] Condition 1: The minimum vertical distance between two adjacent objects being detected is less than or equal to the maximum vertical distance between any two objects being detected.

[0013] Condition 2: The maximum vertical distance between two adjacent detection objects is less than or equal to the minimum vertical length of the detection object.

[0014] Furthermore, the processing unit obtains the current position of the elevator car within the elevator shaft according to the following steps:

[0015] Step S1: Select a certain end detection point of each object to be tested as the reference end of the object to be tested, and establish a first correspondence between the identifier corresponding to each detection point on each object to be tested and the first distance between each detection point on the object to be tested and the reference end of the object to be tested;

[0016] Step S2: Select a reference point for the elevator car position;

[0017] Step S3: Determine the second correspondence between the second distances between the detector, the detected object and its reference end and the current position of the elevator car and the reference point of the elevator car position when the reference end of the detected object is detected by a detector based on the installation position information of the detector and the detected object.

[0018] Step S4, determining a current detection group, the current detection group including a current detection body which is outputting an identification and a current detected body which is being detected by the current detection body;

[0019] Step S5, obtaining a current corresponding second distance according to the second correspondence relationship by using the current detection body and the current detected body;

[0020] Step S6, judging whether the current detection body is detecting the reference end of the current detected body according to the identification output by the current detection body, if yes, taking the current second distance as the current position of the elevator car and ending, otherwise, entering step S7;

[0021] Step S7, obtaining a current corresponding first distance according to the first correspondence relationship by using the identification output by the current detection body, and taking the sum of the first distance and the second distance as the current position of the elevator car and ending.

[0022] Further, the processing unit obtains the current position of the elevator car in the elevator shaft according to the following steps:

[0023] Step S1, connecting each detected body in sequence to form an integral detected body according to the position of the detected body in the shaft; correspondingly, connecting the identification on each detected body in the integral detected body in sequence to form an integral identification;

[0024] Step S2, selecting a reference point of the position of the elevator car;

[0025] Step S3, selecting a reference detection body, and establishing a correspondence relationship between the first distance between the position of the identification detected by the reference detection body and the reference point in the integral detected body and each identification in the integral identification when the reference detection body detects and outputs the identification;

[0026] Step S4, determining a current detection group, the current detection group including a current detection body which is outputting an identification and a current detected body which is being detected by the current detection body;

[0027] Step S5, determining the interval between all detected bodies between the current detected body and the reference point according to the installation position information of the current detected body to obtain a detected body position correction amount;

[0028] Step S6, judging whether the current detection body is the reference detection body, if yes, entering step S7, otherwise, entering step S8;

[0029] Step S7, correcting the first distance by using the detected body position correction amount, and taking the correction result as the final position of the elevator car and ending;

[0030] Step S8, obtaining a detected body position correction amount according to the positional relationship between the current detected body and the reference detected body;

[0031] Step S9, correcting the first distance by using the detected body position correction amount and the detected body position correction amount, taking the correction result as the final elevator car position, and ending.

[0032] Further, the identities corresponding to all detection points of all detected bodies corresponding to the same elevator car are not the same, and the step S4 determines the detected body where the identity is located according to the identity output by the current detected body, and takes the detected body where the identity is located as the current detected body.

[0033] Further, when the interval of any two adjacent detected bodies in the vertical direction is equal to the length of the detected body in the vertical direction and the interval of any two adjacent detected bodies in the vertical direction is equal to the interval of any two detected bodies in the vertical direction, only one detected body outputs the identity at any time; when at least one of all intervals of two adjacent detected bodies in the vertical direction is less than at least one of all intervals of two adjacent detected bodies in the vertical direction, there is a multiple output time, that is, at least two detected bodies output the identity at this time.

[0034] Further, at the multiple output time, the step S4 selects a current detected body that is currently outputting the identity and a current detected body that is currently being detected by the current detected body to construct the current detection group.

[0035] Further, at any time when at least two identities are output, the current detected body and the current detected body constituting the current detection group are switched from the original current detected body outputting the identity and the current detected body being detected by the original current detected body to the current detected body outputting the latest identity and the current detected body being detected by the current detected body.

[0036] Further, the step S4 selects the current detection group in any of the following ways:

[0037] Method 1, at the time when at least two detected bodies output the identity for the first time, discarding the original current detected body outputting the identity and the current detected body being detected by the original current detected body, and using the current detected body outputting the latest identity and the current detected body being detected by the current detected body to construct the current detection group.

[0038] Method 2, at the time when the identity output by at least two detected bodies is about to change to the identity output by only one detected body, discarding the original current detected body outputting the identity and the current detected body being detected by the original current detected body, and using the current detected body outputting the latest identity and the current detected body being detected by the current detected body to construct the current detection group.

[0039] Further, the step S4 determines whether the number of the detection bodies outputting the identification is about to change from at least two to only one, according to the detection body, the installation position information of the detection body and the current position and moving direction of the elevator car, or according to the detection body, the installation position information of the detection body and the current detection body, the current detection object and the current identification being outputted by the current detection body.

[0040] Further, the identification corresponding to the detection point at the same position in each detection object corresponding to the same elevator car is the same, and the step S4 determines the current detection body and the current detection object of the current detection group according to the installation position information of the detection body and the detection object, and the number of times the same identification is outputted.

[0041] Further, the number of times the same identification is outputted refers to the number of times the identification is detected and outputted by the detection body after the elevator car moves away from the reference point.

[0042] Further, when the moving direction of the elevator car is away from the reference point, if the identification is detected again, the number is increased by 1; when the moving direction of the elevator car is towards the reference point, if the identification is detected again, the number is decreased by 1.

[0043] Further, the identification corresponding to the detection point at the same position in each detection object corresponding to the same elevator car is the same, and the interval between any two adjacent detection objects is different, and the step S4 determines the current detection object according to the installation position information of the detection body and the detection object, the interval between the adjacent detection objects and the corresponding relationship between the detection body and the detection object.

[0044] Further, when the length of at least one of the detection objects exceeds the distance between two detection bodies, the processing unit evaluates the installation position error of the detection body according to the following steps:

[0045] Step S1, obtaining two identifications outputted by two detection bodies simultaneously detecting the detection object;

[0046] Step S2, determining the corresponding identification interval distance between the two identifications;

[0047] Step S3, calculating the difference between the identification interval distance and the nominal distance between the two detection bodies;

[0048] Step S4, evaluating the installation position error of the detection body according to the difference.

[0049] Further, the processing unit evaluates the installation error of the detection object and / or the position change of the detection object during the subsequent use of the elevator according to the following steps:

[0050] Step S1, determining the corresponding relationship between the identification corresponding to the end detection point of the detected body output by the detection body and the interval distance between two adjacent detected bodies according to the installation position information of the detection body and the detected body;

[0051] Step S2, receiving the identification information corresponding to the end detection point of the detected body output by the detection body;

[0052] Step S3, determining the nominal value of the interval distance between the adjacent detected bodies corresponding to the identification information according to the identification information and the corresponding relationship;

[0053] Step S4, calculating the detection value of the interval distance between the adjacent detected bodies corresponding to the identification information according to the identification information;

[0054] Step S5, calculating the difference value between the detection value and the nominal value of the interval distance;

[0055] Step S6, evaluating the installation position error and / or installation position change of the detected body according to the difference value.

[0056] Further, the step S4 first determines the identification corresponding to the starting position and the identification corresponding to the ending position of the interval between two adjacent detected bodies according to the identification information and the installation position information of the detection body and the detected body, then determines the distance between the detection points corresponding to the two identifications, and finally takes the distance between the detection points as the detection value of the interval distance.

[0057] Further, the step S4 first determines the elevator car position corresponding to the starting position and the elevator car position corresponding to the ending position of the interval between two adjacent detected bodies according to the installation position information of the detection body and the detected body, then calculates the difference value between the two elevator car positions, and finally takes the difference value as the detection value of the interval distance.

[0058] Further, the processing unit performs fault detection on the detection body according to the following steps:

[0059] Step S1, determining the identification change rule output by the detection body when the elevator car moves according to the installation position information of the detection body and the detected body, the change rule including the corresponding relationship between the detection body outputting the identification and the time sequence change of the identification and the moving direction of the elevator car;

[0060] Step S2, determining the detection body currently outputting the identification, the identification information output by the detection body, and the moving direction information of the elevator car;

[0061] Step S3, judging whether the actual change of the identification information is consistent with the identification change rule it should meet according to the received identification information and the moving direction information of the elevator car, if consistent, determining that the detection body is normal, otherwise, determining that the elevator position detection system fails.

[0062] Further, the processing unit calculates the length of a detection body or the interval distance between two adjacent detection bodies according to the identification output by the detection body, and when the calculation result is inconsistent with the corresponding quantity saved in advance, the processing unit determines that the elevator position detection system fails.

[0063] Further, the sum of the length of the detection body and the interval distance between two adjacent detection bodies is equal to the floor interval distance, so that the detection body outputs an identification when the elevator car enters the door area, and the identification is used as a door area signal.

[0064] Further, the detection body is fixed on the elevator car through a detection body mounting bracket, the detection body has a detection body adjusting part through which the position of the detection body in the vertical direction relative to the elevator car can be adjusted, and the detection body mounting bracket has a detection body adjusting part through which the position of the detection body in the vertical direction relative to the shaft can be adjusted.

[0065] Compared with the prior art, the beneficial technical effects obtained by the present application are as follows:

[0066] Firstly, the present application can realize the full-range position detection of the elevator car in the elevator shaft by selecting appropriate detection bodies and detection bodies and reasonably arranging the installation positions of the detection bodies and the detection bodies, only need to lay the detection bodies at appropriate positions in the elevator shaft, without the need to lay the magnetic ruler with coding information in the whole elevator shaft as required by the direct method of detecting the position of the car in the prior art, avoiding the coding difficulties, the decline of detection accuracy and the increase of cost caused by the excessive length of the magnetic ruler.

[0067] Secondly, the detection system composed of the detection bodies and the detection bodies can be used to monitor the position error of the detection bodies and the detection bodies during the installation process and the change of the position accuracy during the subsequent use, so as to ensure the installation accuracy.

[0068] Thirdly, the present application can monitor the state of the detection body according to the installation information of the detection body and the detection body and the real-time detected information, so as to timely find out whether the sensor as the detection body fails. BRIEF DESCRIPTION OF DRAWINGS

[0069] Figure 1 is a block diagram of the elevator car position detection system of the present application;

[0070] Figures 2 to 6 This is a layout diagram of the detection body and the detected body in the elevator car position detection system of the present invention;

[0071] Figure 7 This is a flowchart of a second embodiment of the elevator car position detection system of the present invention;

[0072] Figure 8 This is a flowchart of a third embodiment of the elevator car position detection system of the present invention;

[0073] Figure 9 This is a flowchart of Embodiment 5 of the elevator car position detection system of the present invention;

[0074] Figure 10 This is a flowchart of Embodiment Six of the elevator car position detection system of the present invention;

[0075] Figure 11 This is a flowchart of Embodiment Seven of the elevator car position detection system of the present invention. Detailed Implementation

[0076] The embodiments of the present invention are described below with reference to the accompanying drawings and specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Specific details are set forth in the following description to provide a thorough understanding of the present invention; however, the present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be based on different viewpoints and applications. Those skilled in the art can make various similar extensions and substitutions without departing from the spirit of the present invention.

[0077] Example 1

[0078] The elevator car position detection system in this embodiment, such as Figure 1 As shown, it includes a processing unit, m detectors and n objects to be detected, where m ≥ 2 and n ≥ 2;

[0079] The detection body is set on the elevator car and moves up and down with the elevator car in the elevator shaft. The detected body is roughly long and vertically installed in the elevator shaft along its length.

[0080] The vertical distribution of the detector and the object being detected ensures that at any position of the elevator car, there is at least one detector and one object being detected facing each other. The facing position means that a certain detection point of the detector and the object being detected are at the same horizontal height in the vertical direction and the distance between them is less than a threshold.

[0081] Each detection point of the detected body has a unique identification in the vertical direction, and when the detection body is in a direct position with any detection point of the detected body, the detection body detects the identification corresponding to the detection point on the detected body in the direct position and outputs a unique and non-repeated identification corresponding to the detected body to the processing unit;

[0082] The processing unit is used to process the identification output by the detection body;

[0083] The position of the detection body and the detected body satisfies the following conditions:

[0084] Condition 1: the minimum distance between two adjacent detected bodies in the vertical direction is less than or equal to the maximum distance between any two detection bodies in the vertical direction;

[0085] Condition 2: the maximum distance between two adjacent detection bodies in the vertical direction is less than or equal to the minimum length of the detected body in the vertical direction.

[0086] The embodiment does not make any limitation on the specific implementation and detection principle of the detection body and the detected body, as long as the detection body can detect any position of the detected body in the length direction. Specifically, the detection body and the detected body here can be a reading head and a magnetic ruler (for example, CN201680066348.8), an optical sensor and a measuring tape with at least one marking element with optical marks (for example, CN201710234793.7), a camera and a hoistway surface structure with a certain degree of differentiation (for example, CN201580067931.6), a photoelectric light-emitting-light-receiving mechanism and an obstruction (the obstruction is provided with a light-transmitting hole containing coding information), and the like.

[0087] The embodiment can realize full-range position detection of the elevator car in the elevator hoistway by selecting appropriate detection body and detected body and reasonably arranging the installation position of the detection body and the detected body, only need to lay the detected body at a suitable position in the elevator hoistway, without laying the magnetic ruler with coding information throughout the elevator hoistway as required by the direct method of the prior art to detect the position of the car, avoiding the coding dilemma caused by the excessive length of the magnetic ruler, and the defects of reduced detection accuracy and increased cost.

[0088] Embodiment Two

[0089] Based on embodiment one, the embodiment details a solution for how to obtain the current position of the elevator car.

[0090] Specifically, as shown in Figure 7 , the processing unit obtains the current position of the elevator car in the elevator hoistway according to the following steps:

[0091] Step S1, selecting a certain end detection point of each detected body as the reference end of the detected body, establishing a first correspondence between the identification corresponding to each detection point on the detected body and the first distance between each detection point on the detected body and the reference end of the detected body; in general, the first correspondence will be completed by the manufacturer of the detection body and the detected body in advance and integrated into the detection body;

[0092] Step S2, selecting a reference point of the elevator car position;

[0093] Step S3, according to the installation position information of the detection body and the detected body, determining the second correspondence between the detection body, the detected body and its reference end, the current position of the elevator car and the reference point of the elevator car position when the reference end of the detected body is detected by a certain detection body;

[0094] Step S4, determining a current detection group, which includes a detection body currently outputting an identification and a current detected body currently being detected by the current detection body;

[0095] Step S5, using the current detection body and the current detected body, obtaining the current corresponding second distance according to the second correspondence;

[0096] Step S6, determining whether the current detection body is detecting the reference end of the current detected body according to the identification output by the current detection body, if yes, taking the current second distance as the current position of the elevator car, and ending, otherwise, entering step S7;

[0097] Step S7, obtaining the current corresponding first distance using the first correspondence according to the identification output by the current detection body, and taking the sum of the first distance and the second distance as the current position of the elevator car, and ending.

[0098] In theory, any point in the elevator shaft can be used as the reference point of the elevator car position. In order to facilitate the calculation of the elevator car position, the lower end of the detected body located at the bottom end of the elevator shaft can be used as the reference point. If the detection signal when the lowermost detection body on the elevator car is directly opposite to the reference point is used as the detection signal corresponding to the reference point, then the current position of the elevator car in the elevator shaft is defined as the distance between the lowermost detection body on the elevator car and the reference point.

[0099] In the above steps, the first distance will have positive and negative values according to the reference point of the elevator car position and the reference end. Similarly, the second distance will have positive and negative values according to the detection body, the detected body and its reference end, the reference point of the elevator car position.

[0100] When the lower end of the detected body located at the bottom of the elevator shaft is taken as the reference point and the current position of the elevator car in the elevator shaft is defined as the distance between the lowermost detected body of the elevator car and the reference point, the lowermost detected body of the elevator car will not be lower than the reference point regardless of the position of the elevator car in the shaft. The distance (in essence, displacement) in the definition of the "current position of the elevator car in the elevator shaft" is the distance of the elevator car upward relative to the reference point and is positive (implicitly defined as negative when the elevator car is below the reference point, but since the reference point is determined so that the elevator car cannot be below the reference point, the distance cannot be negative). The second distance is the distance between the current position of the elevator car in the elevator shaft when the reference end of the detected body is detected by a certain detected body and the reference point of the position of the elevator car (which also involves the distance of the current detected body relative to the lowermost detected body), since all ends of all detected bodies are above the reference point of the position of the elevator car (the end is the reference point except for the reference point), the reference end of the detected body must be detected by the detected body when the current position of the elevator car is above the reference point of the position of the elevator car, i.e. the second distance is directed upward from the reference point of the position of the elevator car, which is consistent with the direction of the distance in the definition of the "current position of the elevator car in the elevator shaft", so it must be positive and cannot be negative. However, the first distance is not necessarily positive. When the upper end of the detected body is selected as the reference end of the detected body, the first distance defines the distance from the upper end of the detected body to the detection point, at this time the detection point must be the reference end of the detected body or below the reference end of the detected body, so the first distance must be directed from the upper end of the detected body to the detection point below the upper end, it is not difficult to see that the direction of the first distance at this time is necessarily opposite to the direction of the second distance and the direction of the distance in the definition of the "current position of the elevator car in the elevator shaft", at this time the first distance needs to be taken as negative as the final first distance, so that the calculation result of the position of the elevator car based on the first distance and the second distance is correct.

[0101] When the reference point of the position of the elevator car is not fixed at the lowermost part and the elevator car is not always above the reference point, such as the reference point being located at a certain position in the middle of the shaft, at this time the direction of the distance in the definition of the position of the elevator car, the direction of the first distance and the direction of the second distance will appear positive and negative values, which can be analyzed according to the above description.

[0102] Embodiment Three

[0103] Based on embodiment one, this embodiment describes another scheme for obtaining the current position of the elevator car in detail.

[0104] Specifically, as Figure 8As shown, the processing unit acquires the current position of the elevator car in the elevator shaft according to the following steps:

[0105] Step S1, according to the position of the detected body in the shaft, the detected bodies are sequentially connected to form a whole detected body; accordingly, the marks on each detected body in the whole detected body are sequentially connected to form a whole mark;

[0106] Step S2, selecting a reference point of the position of the elevator car;

[0107] Step S3, selecting a reference detected body, establishing a corresponding relationship between the first distance between the mark detected by the reference detected body when the reference detected body detects and outputs each mark in the whole mark and the position of the detection point corresponding to the mark in the whole detected body and the reference point;

[0108] Step S4, determining a current detection group, the current detection group including a detected body currently outputting a mark and a current detected body currently being detected by the current detected body;

[0109] Step S5, determining the interval between all detected bodies between the current detected body and the reference point according to the installation position information of the current detected body, and obtaining the detected body position correction amount;

[0110] Step S6, determining whether the current detected body is the reference detected body, if yes, entering step S7, otherwise entering step S8;

[0111] Step S7, correcting the first distance by using the detected body position correction amount, and taking the correction result as the final position of the elevator car, and ending;

[0112] Step S8, obtaining the detected body position correction amount according to the positional relationship between the current detected body and the reference detected body;

[0113] Step S9, correcting the first distance by using the detected body position correction amount and the detected body position correction amount, and taking the correction result as the final position of the elevator car, and ending.

[0114] Example Four

[0115] On the basis of example two and example three, this embodiment limits and explains the different situations of the detected bodies in the detection system.

[0116] In the first case, if all the marks corresponding to all the detection points of all the detected bodies corresponding to the same elevator car are not the same, the step S4 determines the detected body where the mark output by the current detected body is located, and takes the detected body as the current detected body.

[0117] The layout of the detection bodies and the detected bodies will be described in detail below.

[0118] When the interval of any two adjacent detection bodies in the vertical direction is equal to the length of the detected body in the vertical direction and the interval of any two adjacent detected bodies in the vertical direction is equal to the interval of any two detection bodies in the vertical direction, only one detection body outputs the identification at any time.

[0119] Specifically, as shown in the detection system, Figure 3 includes three detected bodies and two detection bodies, the detected bodies are laid out at intervals on one side of the elevator shaft, and the detection bodies are arranged on the side of the elevator car close to the detected bodies. The interval of adjacent detected bodies in the vertical direction is equal and equal to the interval of the two detection bodies in the vertical direction, and the length of the detected body in the vertical direction is equal and equal to the interval of the two detection bodies in the vertical direction, that is, the length of the detected body in the vertical direction, the interval of the two detection bodies in the vertical direction, and the interval of the two adjacent detected bodies in the vertical direction are all the same.

[0120] When at least one of all intervals of two adjacent detected bodies in the vertical direction is less than at least one of all intervals of two adjacent detection bodies in the vertical direction, there is a multiple output moment, that is, at least two detection bodies output the identification at this moment. In the multiple output moment, the step S4 selects a detection body currently outputting the identification and a current detected body currently detected by the current detection body to construct the current detection group.

[0121] Specifically, as shown in the detection system, Figure 2 includes three detected bodies and two detection bodies, the detected bodies are laid out at intervals on one side of the elevator shaft, and the detection bodies are arranged on the side of the elevator car close to the detected bodies. The length of the detected body in the vertical direction is equal but greater than the interval of the two detection bodies in the vertical direction, and the interval of adjacent detected bodies in the vertical direction is equal and less than the interval of the two detection bodies in the vertical direction, which results in multiple multiple output moments, such as two detection bodies corresponding to two different detection points on one detected body at the same time, or two detection bodies corresponding to two different detection points on two detected bodies at the same time.

[0122] In fact, the detection system can be configured with any number of detection bodies and detected bodies, i.e. any number of detection bodies are arranged at any horizontal level around the elevator car, and the corresponding detected bodies are arranged in the elevator shaft to form a direct opposite position with the detection bodies. It should be noted that the two adjacent detected bodies mentioned above refer to two detected bodies adjacent in the same vertical direction. If the detected bodies are in different vertical directions, all the detected bodies are divided into different groups according to the vertical direction, and the two adjacent detected bodies are two detected bodies adjacent in each group.

[0123] As shown in the detection system shown in Figure 4 , four detected bodies and two detection bodies are included, two detection bodies are laid on one side of the elevator shaft, and the other two detection bodies are laid on the opposite side of the elevator shaft. Corresponding to the detected bodies, the two detection bodies are oriented differently, one detection body is oriented towards the two detected bodies on one side of the elevator shaft, and the other detection body is oriented towards the two detected bodies on the other side of the elevator shaft. Among them, the length of the detected bodies in the vertical direction is equal and equal to the interval of the two detection bodies in the vertical direction, the interval of the two detected bodies on the left side of the shaft in the vertical direction is equal to the interval of the two detected bodies on the right side of the shaft in the vertical direction, and the interval of the two detection bodies in the vertical direction is twice the interval of the two detection bodies in the vertical direction, i.e. the interval between the upper end of the lower detected body on the left side of the shaft and the lower end of the lower detected body on the right side of the shaft in the vertical direction is equal to the interval of the two detection bodies in the vertical direction, the lower end of the upper detected body on the left side of the shaft is aligned with the upper end of the lower detected body on the right side of the shaft, and the interval between the upper end of the upper detected body on the left side of the shaft and the lower end of the upper detected body on the right side of the shaft in the vertical direction is equal to the interval of the two detection bodies in the vertical direction. The two detected bodies on the left side of the shaft and the two detected bodies on the right side of the shaft are in different vertical directions, so they cannot form adjacent detected bodies. Obviously, at any moment or at any position of the elevator car, only one detection body can detect a certain detection point on a detected body and output the identification corresponding to the detection point.

[0124] As shown in the detection system shown in Figure 5In the detection system shown, five detected bodies and two detectors are included, three of the detected bodies are laid on one side of the elevator shaft, and the other two detected bodies are laid on the opposite side of the elevator shaft, and the two detectors are correspondingly oriented, one detector is oriented towards the three detected bodies on one side of the elevator shaft, and the other detector is oriented towards the two detected bodies on the opposite side of the elevator shaft. The length of the detected bodies in the vertical direction is equal but greater than the interval of the two detectors in the vertical direction, the interval of the two adjacent detected bodies on the left side of the shaft in the vertical direction is equal to the interval of the two adjacent detected bodies on the right side of the shaft in the vertical direction but greater than the interval of the two detectors in the vertical direction, the interval of the upper end of the lowermost detected body on the left side of the shaft and the lower end of the lower detected body on the right side of the shaft in the vertical direction, the interval of the upper end of the middle detected body on the left side of the shaft and the lower end of the upper detected body on the right side of the shaft in the vertical direction are equal and equal to the interval of the two detectors in the vertical direction, the interval of the lower end of the middle detected body on the left side of the shaft and the lower end of the lower detected body on the right side of the shaft in the vertical direction, the interval of the upper end of the middle detected body on the left side of the shaft and the upper end of the lower detected body on the right side of the shaft in the vertical direction are equal and equal to the difference between the length of the detected body in the vertical direction and the interval of the two detectors in the vertical direction, the interval of the lower end of the uppermost detected body on the left side of the shaft and the lower end of the upper detected body on the right side of the shaft in the vertical direction, the interval of the upper end of the uppermost detected body on the left side of the shaft and the upper end of the upper detected body on the right side of the shaft in the vertical direction are equal and equal to the difference between the length of the detected body in the vertical direction and the interval of the two detectors in the vertical direction.

[0125] As shown in the detection system, Figure 6 In the detection system shown, five detected bodies and two detectors are included, three of the detected bodies are laid on one side of the elevator shaft, and the other two detected bodies are laid on the opposite side of the elevator shaft, and the two detectors are correspondingly oriented, one detector is oriented towards the three detected bodies on one side of the elevator shaft, and the other detector is oriented towards the two detected bodies on the opposite side of the elevator shaft. The length of the detected bodies in the vertical direction is equal but greater than the interval of the two detectors in the vertical direction, the interval of the two adjacent detected bodies on the left side of the shaft in the vertical direction is equal to the interval of the two adjacent detected bodies on the right side of the shaft in the vertical direction but greater than the interval of the two detectors in the vertical direction, the interval of the upper end of the lowermost detected body on the left side of the shaft and the lower end of the lower detected body on the right side of the shaft in the vertical direction, the interval of the upper end of the middle detected body on the left side of the shaft and the lower end of the upper detected body on the right side of the shaft in the vertical direction are equal and equal to the interval of the two detectors in the vertical direction, the interval of the lower end of the middle detected body on the left side of the shaft and the lower end of the lower detected body on the right side of the shaft in the vertical direction, the interval of the upper end of the middle detected body on the left side of the shaft and the upper end of the lower detected body on the right side of the shaft in the vertical direction are equal and equal to the difference between the length of the detected body in the vertical direction and the interval of the two detectors in the vertical direction, the interval of the lower end of the uppermost detected body on the left side of the shaft and the lower end of the upper detected body on the right side of the shaft in the vertical direction, the interval of the upper end of the uppermost detected body on the left side of the shaft and the upper end of the upper detected body on the right side of the shaft in the vertical direction are equal and equal to the difference between the length of the detected body in the vertical direction and the interval of the two detectors in the vertical direction.

[0126] The detection system of the above configuration is such that each detection body is in a directly opposite position with each detection point of each detected body in the vertical direction, and each detection point of each detected body is in a directly opposite position with each detection body in the vertical direction. The distribution of the detection bodies and the detected bodies in the vertical direction is such that at least one detection body and one detected body are in a directly opposite position at any position of the elevator car.

[0127] Further, at any time when at least two identities are output, the current detection body and the current detected body constituting the current detection group are switched from the current detection body and the current detected body being detected by the current detection body outputting the original identity to the current detection body and the current detected body being detected by the current detection body outputting the latest identity. Specifically, the step S4 selects the current detection group in any of the following manners:

[0128] Manner 1, at the time when at least two detection bodies output identities for the first time, the current detection body and the current detected body being detected by the current detection body outputting the original identity are discarded, and the current detection group is formed by the current detection body and the current detected body being detected by the current detection body outputting the latest identity;

[0129] Manner 2, at the time when the identities output by at least two detection bodies are about to change to the identity output by only one detection body, the current detection body and the current detected body being detected by the current detection body outputting the original identity are discarded, and the current detection group is formed by the current detection body and the current detected body being detected by the current detection body outputting the latest identity, wherein the current detection body outputting the latest identity refers to the detection body outputting the latest identity among the at least two detection bodies outputting identities.

[0130] In the manner 2, the step S4 determines whether the identities output by at least two detection bodies are about to change to the identity output by only one detection body according to the installation position information of the detection bodies and the detected bodies, and the current position and the moving direction of the elevator car, or according to the installation position information of the detection bodies and the detected bodies, and the current detection body, the current detected body, and the current identity being output by the current detection body.

[0131] In the second case, if the identities corresponding to the detection points of the same position in each detected body corresponding to the same elevator car are the same, the step S4 determines the current detection body and the current detected body of the current detection group according to the installation position information of the detection bodies and the detected bodies, and the number of times of outputting the same identity. The number of times of outputting the same identity refers to the number of times of detecting and outputting the identity by the detection body after the elevator car leaves the reference point.

[0132] Specifically, when the moving direction of the elevator car is away from the reference point, if the identification is detected again, the number of times is added by 1; when the moving direction of the elevator car is towards the reference point, if the identification is detected again, the number of times is reduced by 1.

[0133] At this time, all the detected bodies are of the same specification, facilitating production and installation management, but after the elevator system is powered off and powered on again, the current position of the elevator car cannot be determined due to the uncertainty of the serial number of the detected body that is in the directly opposite position with the detected body of the current output identification, so it is necessary to control the elevator to return to the reference point.

[0134] Further, if the identifications corresponding to the detection points of the same position in each detected body corresponding to the same elevator car are the same and the intervals between any two adjacent detected bodies are all different, the current detected body can also be determined according to the installation position information of the detected body and the detected body, the intervals between the adjacent detected bodies, and the corresponding relationship between the detected body and the detected body.

[0135] Embodiment Five

[0136] On the basis of Embodiment One, this embodiment further details how to monitor the installation accuracy of the detected body and the detection body.

[0137] As shown in Figure 2 , Figure 5 When the length of at least one of the detected bodies exceeds the distance between two detection bodies, the processing unit evaluates the installation position error of the detection body according to the following steps as shown in Figure 9 .

[0138] Step S1, acquiring two identifications of the detection outputs of the two detection bodies that detect the detected body at the same time;

[0139] Step S2, determining the identification interval distance corresponding to the two identifications;

[0140] Step S3, calculating the difference between the identification interval distance and the nominal distance between the two detection bodies;

[0141] Step S4, evaluating the installation position error of the detection body according to the difference.

[0142] The above method is also applicable to the position detection of the elevator car position detection system when the position of the detection body changes in the subsequent use process.

[0143] This embodiment can use the information detected by the detection system composed of the detection body and the detected body to monitor whether there is an error in the position of the detection body during installation and whether the position change of the detection body during the use of the elevator meets the requirements.

[0144] Embodiment Six

[0145] Based on the embodiment one, this embodiment further describes how to monitor the installation accuracy of the detected object by using the detected object and the detector.

[0146] Specifically, as shown in Figure 10 the processing unit evaluates the installation error of the detected object according to the following steps:

[0147] Step S1, according to the installation position information of the detector and the detected object, determine the corresponding relationship between the identification corresponding to the end detection point of the detected object output by each detector and the interval distance between two adjacent detected objects;

[0148] Step S2, receive the identification information corresponding to the end detection point of the detected object output by the detector;

[0149] Step S3, according to the identification information and the corresponding relationship, determine the nominal value of the interval distance between the adjacent detected objects corresponding to the identification information;

[0150] Step S4, according to the identification information, calculate the detection value of the interval distance between the adjacent detected objects corresponding to the identification information;

[0151] Step S5, calculate the difference between the detection value of the interval distance and its nominal value;

[0152] Step S6, according to the difference, evaluate the installation position error of the detected object.

[0153] In step S4, the detection value of the interval distance can be determined in any of the following ways:

[0154] Method 1, the step S4 first determines the identification corresponding to the starting position and the identification corresponding to the ending position of the interval between two adjacent detected objects according to the identification information and the installation position information of the detector and the detected object, then determines the distance between the detection points corresponding to the two identifications, and finally takes the distance between the detection points as the detection value of the interval distance;

[0155] Method 2, the step S4 first determines the elevator car position corresponding to the starting position and the elevator car position corresponding to the ending position of the interval between two adjacent detected objects according to the installation position information of the detector and the detected object, then calculates the difference between the two elevator car positions, and finally takes the difference as the detection value of the interval distance.

[0156] This embodiment uses the detection results of the detection system to monitor the position error of the detected object during the installation process, thereby ensuring the installation accuracy; the above method is also applicable to the detection and judgment of the position change of the detected object by the elevator car position detection system during subsequent use.

[0157] Embodiment Seven

[0158] On the basis of Embodiment One, this embodiment further describes how to use the detected body and the detector to achieve the fault detection of the detector.

[0159] Specifically, as shown in Figure 11 the processing unit performs fault detection on the detector according to the following steps:

[0160] Step S1, determining the identification change rule output by the detector when the elevator car moves according to the installation position information of the detector and the detected body, the change rule including the corresponding relationship between the detector outputting the identification and the timing change of the identification and the moving direction of the elevator car;

[0161] Step S2, determining the detector currently outputting the identification, the identification information output by the detector, and the moving direction information of the elevator car;

[0162] Step S3, judging whether the actual change of the identification is consistent with the identification change rule it should meet according to the received identification information and the moving direction information of the elevator car, if consistent, determining that the detector is normal, otherwise, determining that the elevator position detection system has a fault.

[0163] In addition, the processing unit can also calculate the length of the detected body or the distance between two adjacent detected bodies according to the identification output by a certain detector, and when the calculation result is inconsistent with the corresponding quantity saved in advance (usually provided by the manufacturer of the detected body or the installation manufacturer), the processing unit determines that the elevator position detection system has a fault.

[0164] This embodiment can monitor the state of the detector according to the installation information of the detector and the detected body and the real-time detected information, so as to timely find out whether the sensor as the detector has a fault.

[0165] Embodiment Eight

[0166] On the basis of Embodiment One, this embodiment further describes how to use the signal output by the detector as the door zone signal.

[0167] Although after realizing the detection of any position of the elevator car, the elevator car position signals corresponding to the time when the elevator car enters and leaves the door zone (i.e. the identification output by the detector when the elevator car enters the door zone and the identification output by the detector when the elevator car leaves the door zone) can be obtained, these two car position signals are the door zone signals. Therefore, as long as the corresponding relationship between these two signals and the door zone signal is established in advance, it is not necessary to limit the length of the detected body and the distance between adjacent detected bodies.

[0168] The embodiment proposes the following preferred solution:

[0169] The length of the detected body is determined by the maximum distance between two adjacent detected bodies (in engineering practice, the distance between two adjacent detected bodies is usually made equal), which is the first degree of freedom; the interval distance between the detected bodies is determined by the maximum distance between any two detected bodies (i.e. the distance between the uppermost detected body and the lowermost detected body), which is the second degree of freedom; and the setting of the reference point also has a certain degree of freedom. It can be seen that reasonable setting of the three degrees of freedom makes it possible for the actual installation position of the detected body to be located at the door zone, so that the identification of the detected body can be used as a door zone signal.

[0170] Specifically, the length of the detected body and the interval distance between two adjacent detected bodies are equal to the floor spacing, so that the detected body outputs an identification when the elevator car enters the door zone, and the identification is used as a door zone signal.

[0171] If the floor spacing of the building where the elevator is located is approximately equal, then as long as the length of the detected body and the interval distance are approximately equal to the floor spacing, the goal of the actual installation position of the detected body being located at the door zone can be achieved.

[0172] Usually, the number of detected bodies has a limited range of variation (usually 2-3), so the length of the detected body is also approximately fixed. The position of the reference point can be selected to ensure that at least one detected body is located at the door zone. Thus, to ensure that the length of the detected body and the interval distance between two adjacent detected bodies are approximately equal to the floor spacing, there is only one means left, which is to adjust the distance between the uppermost detected body and the lowermost detected body. For this purpose, the detected body is fixed to the elevator car by a detected body mounting bracket, the detected body is fixed in the elevator shaft by a detected body mounting bracket, the detected body mounting bracket has a detected body adjusting portion by which the position of the detected body in the vertical direction relative to the elevator car can be adjusted, and the detected body mounting bracket has a detected body adjusting portion by which the position of the detected body in the vertical direction relative to the shaft can be adjusted.

[0173] The embodiment rationally sets the position of the detected body in the elevator shaft, so that the information detected by the detected body can be used as a door zone signal.

[0174] The above has described the present application in detail through specific embodiments, and the above embodiments are only preferred embodiments of the present application, and the present application is not limited to the above embodiments. Equivalent substitutions and improvements made by those skilled in the art without departing from the principles of the present application should be considered within the scope of the technology protected by the present application.

Claims

1. An elevator car position detection system, characterized in that, The detection system includes a processing unit, m detection objects and n objects to be detected, where m ≥ 2 and n ≥ 2; The detection body is set on the elevator car and moves up and down with the elevator car in the elevator shaft. The detected body is roughly long and vertically installed in the elevator shaft along its length. The vertical distribution of the detector and the object being detected ensures that at any position of the elevator car, there is at least one detector and one object being detected facing each other. The facing position means that a certain detection point of the detector and the object being detected are at the same horizontal height in the vertical direction and the distance between them is less than a threshold. Each detection point of the tested object has a unique identifier in the vertical direction. When the detection object is directly opposite any detection point of the tested object, the detection object detects the identifier corresponding to the detection point on the tested object that is directly opposite it and outputs a unique and non-repeating identifier corresponding to the tested object to the processing unit. The processing unit is used to process the identifier output by the detection body; The positions of the detector and the detected object satisfy the following conditions: Condition 1: The minimum vertical distance between two adjacent objects being detected is less than or equal to the maximum vertical distance between any two objects being detected. Condition 2: The maximum vertical distance between two adjacent detection objects is less than or equal to the minimum vertical length of the detection object.

2. The elevator car position detection system according to claim 1, characterized in that, The processing unit obtains the current position of the elevator car within the elevator shaft according to the following steps: Step S1: Select a certain end detection point of each object to be tested as the reference end of the object to be tested, and establish a first correspondence between the identifier corresponding to each detection point on the object to be tested and the first distance corresponding to each detection point. The first distance is the distance between each detection point and the reference end of the object to be tested where the detection point is located. Step S2: Select a reference point for the elevator car position; Step S3: Determine the second correspondence between the detector, the tested object and its reference end and the second distance when the reference end of the tested object is detected by a detector based on the installation position information of the detector and the tested object. The second distance is the distance between the current position of the elevator car and the reference point of the elevator car position when the reference end of the tested object is detected by a detector. Step S4: Determine a current detection group, which includes a detection body that is currently outputting an identifier and a current detection body that is currently being detected by the current detection body; Step S5: Using the current detected object and the current detected object, obtain the current corresponding second distance according to the second correspondence relationship; Step S6: Determine whether the current detector is detecting the reference end of the current object based on the identifier output by the current detector. If yes, take the current second distance as the current position of the elevator car and end; otherwise, proceed to step S7. Step S7: Based on the identifier output by the current detection body, obtain the first distance corresponding to the current location using the first correspondence relationship, and take the sum of the first distance and the second distance as the current position of the elevator car, and end.

3. The elevator car position detection system according to claim 2, characterized in that, The identifiers corresponding to all detection points of all detected objects corresponding to the same elevator car are different. Step S4 determines the detected object where the identifier is located based on the identifier output by the current detected object, and takes the detected object where the identifier is located as the current detected object.

4. The elevator car position detection system according to claim 2, characterized in that, When the vertical distance between any two adjacent detectors is equal to the vertical length of the detected object and the vertical distance between any two adjacent detected objects is equal to the vertical distance between any two adjacent detectors, only one detector outputs the identifier at any given time. When at least one of the vertical distances between two adjacent detected objects is less than at least one of the vertical distances between two adjacent detected objects, there exists a multi-output moment, which means that at least two detected objects output the identifier at that moment.

5. The elevator car position detection system according to claim 4, characterized in that, At the multiple output time, step S4 selects a detector that is currently outputting an identifier and a detector that is currently being detected by the current detector to construct the current detection group.

6. The elevator car position detection system according to claim 5, characterized in that, At any moment when at least two identifiers are output, the current detector and the current detected entity constituting the current detection group will be switched from the current detector with the original output identifier and the current detected entity being detected to the current detector with the latest output identifier and the current detected entity being detected.

7. The elevator car position detection system according to claim 6, characterized in that, Step S4 selects the current detection group in any of the following ways: Method 1: When at least two detection bodies output identifiers for the first time, discard the current detection body with the original output identifier and the current detected body being detected, and use the current detection body with the latest output identifier and the current detected body being detected to form the current detection group; Method 2: When the output identifier of at least two detectors is about to change to only one detector output identifier, discard the current detector with the original output identifier and the current detected object being detected, and use the current detector with the latest output identifier and the current detected object being detected to form the current detection group.

8. The elevator car position detection system according to claim 7, characterized in that, Step S4 determines whether the output of at least two detectors will soon change to only one detector based on the installation position information of the detector and the object being detected, as well as the current position and direction of movement of the elevator car, or based on the installation position information of the detector and the object being detected, as well as the current identifier output by the current detector, the current object being detected, and the current identifier being output by the current detector.

9. The elevator car position detection system according to claim 2, characterized in that, The identifier corresponding to the detection point at the same position in each detected body corresponding to the same elevator car is the same. Step S4 determines the current detected body and the current detected body of the current detection group based on the installation position information of the detected body and the detected body and the number of times the same identifier is output.

10. The elevator car position detection system according to claim 9, characterized in that, The number of times the same identifier is output refers to the number of times the identifier is detected and output by the detection body after the elevator car leaves the reference point.

11. The elevator car position detection system according to claim 10, characterized in that, When the elevator car is moving away from the reference point, if the marker is detected again, the count is incremented by 1; when the elevator car is moving towards the reference point, if the marker is detected again, the count is decremented by 1.

12. The elevator car position detection system according to claim 10, characterized in that, The identification corresponding to the detection point at the same position in each detected body corresponding to the same elevator car is the same, and the interval between any two adjacent detected bodies is different. Step S4 determines the current detected body based on the installation position information of the detection body and the detected body, the intervals between adjacent detected bodies, and the correspondence between the detection body and the detected body.

13. The elevator car position detection system according to claim 1, characterized in that, When the length of at least one of the detected objects exceeds the distance between the two detected objects, the processing unit evaluates the installation position error of the detected objects according to the following steps: Step S1: Obtain the two identifiers output by the two detectors that simultaneously detect the detected object; Step S2: Determine the distance between the two corresponding markers; Step S3: Calculate the difference between the distance between the markers and the nominal distance between the two detectors; Step S4: Evaluate the installation position error of the detector based on the difference.

14. The elevator car position detection system according to claim 1, characterized in that, The processing unit evaluates the installation error of the object under test and / or the positional change of the object under test during subsequent use of the elevator according to the following steps: Step S1: Determine the correspondence between the identifier of the end detection point of the detected object output by each detector and the interval distance between two adjacent detected objects based on the installation position information of the detector and the detected object. Step S2: Receive the identification information corresponding to the detection point at the end of the object being tested, output by the detector. Step S3: Determine the nominal value of the interval distance between adjacent detected objects corresponding to the identification information based on the identification information and the correspondence relationship; Step S4: Calculate the detection value of the interval distance between adjacent detected objects corresponding to the identification information based on the identification information; Step S5: Calculate the difference between the detected value of the interval distance and its nominal value; Step S6: Evaluate the installation position error and / or installation position change of the tested object based on the difference.

15. The elevator car position detection system according to claim 14, characterized in that, Step S4 first determines the identifier corresponding to the start position and the identifier corresponding to the end position of the interval between two adjacent objects based on the identification information and the installation position information of the detector and the object being detected. Then, it determines the distance between the detection points corresponding to these two identifiers and finally uses the distance between the detection points as the detection value of the interval distance.

16. The elevator car position detection system according to claim 14, characterized in that, Step S4 first determines the elevator car position corresponding to the start position and the elevator car position corresponding to the end position of the interval between two adjacent detected objects based on the installation position information of the detector and the detected object. Then, it calculates the difference between the two elevator car positions and finally uses the difference as the detection value of the interval distance.

17. The elevator car position detection system according to claim 1, characterized in that, The processing unit performs fault detection on the detector according to the following steps: Step S1: Determine the pattern of the identifier output by the detector when the elevator car moves based on the installation position information of the detector and the detected object. The pattern of change includes the detector that outputs the identifier and the correspondence between the temporal change of the identifier and the direction of movement of the elevator car. Step S2: Determine the detector of the current output identifier and its output identifier information and the elevator car's direction of movement information; Step S3: Based on the received identification information and the elevator car's direction of movement information, determine whether the actual change of the identification is consistent with the identification change pattern it should meet. If it is consistent, determine that the detection body is normal; otherwise, determine that the elevator car position detection system has malfunctioned.

18. The elevator car position detection system according to claim 1, characterized in that, The processing unit calculates the length of the detected object or the distance between two adjacent detected objects based on the identifier output by a certain detector. When the calculation result is inconsistent with the corresponding quantity saved in advance, the processing unit determines that the elevator car position detection system has malfunctioned.

19. The elevator car position detection system according to claim 1, characterized in that, The sum of the length of the detected object and the distance between two adjacent detected objects is equal to the floor spacing, so that the detected object outputs an identifier when the elevator car enters the door zone, and this identifier is used as a door zone signal.

20. The elevator car position detection system according to claim 1, characterized in that, The detection body is fixed to the elevator car by a detection body mounting bracket, and the object to be detected is fixed in the elevator shaft by a detection body mounting bracket. The detection body mounting bracket has a detection body adjustment part, through which the position of the detection body in the vertical direction relative to the elevator car can be adjusted. The object to be detected mounting bracket has an object to be detected adjustment part, through which the position of the object to be detected in the vertical direction relative to the shaft can be adjusted.

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