CN108534670B - Detection system for absolute position of car with special protection section and installation method thereof - Google Patents
Detection system for absolute position of car with special protection section and installation method thereof Download PDFInfo
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- CN108534670B CN108534670B CN201810193799.9A CN201810193799A CN108534670B CN 108534670 B CN108534670 B CN 108534670B CN 201810193799 A CN201810193799 A CN 201810193799A CN 108534670 B CN108534670 B CN 108534670B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/3492—Position or motion detectors or driving means for the detector
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
Abstract
The invention discloses a detection system for the absolute position of a car with a special protection section and an installation method thereof, wherein the detection system comprises the following steps: the grating ruler is vertically arranged in the hoistway and provided with a row of first-type marks and a row of second-type marks, the first-type marks comprise through hole units and first entity units which are arranged in an upper limit coding region and a lower limit coding region and second entity units which are arranged in an upper terminal coding region and a lower terminal coding region, and the second-type marks comprise pattern units which are arranged in the upper limit coding region and the lower limit coding region and third entity units which are arranged in the upper terminal coding region and the lower terminal coding region; the detection device is provided with a first sensor and a second sensor which are vertically arranged; and a controller in communication with the detection device. The detection system for the absolute position of the car with the special protection section and the installation method thereof can identify the extreme position and the terminal position of the car and can adjust the coded information of the grating ruler on site.
Description
Technical Field
The invention relates to the technical field of elevators, in particular to a detection system for an absolute position of a car with a special protection section and an installation method thereof.
Background
According to the elevator safety requirement, most elevators need to be respectively provided with a limit switch, a terminal switch and a signal transmission cable at two ends of a hoistway, and a plate beating device of the limit switch needs to be arranged at the side of a car to ensure that an elevator car cannot exceed the travel range allowed by operation, wherein the terminal switch is closer to two ends of the hoistway than the limit switch. When the limit switch is operated, the elevator is prevented from continuously running towards the two ends, but the elevator is allowed to run towards the middle direction of the shaft, and after the terminal switch is operated, the elevator is forbidden to continuously run. The technology has the defects of more parts and inconvenient installation and maintenance.
In addition, a magnetic grid ruler or a grating ruler is arranged in the hoistway from top to bottom, a grid ruler code reading device is arranged on the side of the car and used for detecting the absolute position of the car, and the limit position and the terminal position are arranged to ensure that the car of the elevator cannot exceed the travel range allowed by operation. According to the technology, because the whole grid ruler is continuously coded from top to bottom, and because the sizes of all elevator hoistways are different, the customized length production cannot be performed on each hoistway generally during the mass production and manufacturing of the grid ruler, the codes of the upper limit position and the lower limit position cannot be determined in advance, the limit positions and the terminal positions cannot be physically distinguished, and the limit positions and the terminal positions can be recorded only in a field hoistway actual position learning mode. Therefore, if the upper and lower limit position codes are determined in advance, great inconvenience is brought in the production and manufacturing links of the grating ruler; if the upper and lower limit position codes are not determined in advance, field learning is necessary, otherwise the system cannot realize the safety function of limiting the elevator travel range before the position of the hoistway is learned.
Disclosure of Invention
Therefore, the system and the method for detecting the absolute position of the car with the special protection section are needed to be provided, the limit position and the terminal position of the car can be identified, the running safety of the car is guaranteed, meanwhile, the actual manufacturing length and the size of the grating ruler do not need to be strictly controlled according to the size of a customer hoistway, and the production of the grating ruler in a manufacturing plant and the installation and adjustment on the site are facilitated.
The technical scheme is as follows:
in one aspect, the present invention provides a system for detecting an absolute position of a car with a special protection section, comprising: the elevator car elevator comprises a grating ruler which is vertically arranged in a hoistway, wherein the grating ruler is provided with a row of first type identifications and a row of second type identifications which are arranged in parallel along the length direction of the grating ruler, the first type identifications and the second type identifications are matched to form absolute position information of a car, the grating ruler comprises an upper limit coding region, a lower limit coding region, an upper terminal coding region butted with the upper limit coding region and a lower terminal coding region butted with the lower limit coding region, the first type identifications comprise a plurality of through hole units and a plurality of first entity units which are arranged in the upper limit coding region and the lower limit coding region, and second entity units which are arranged in the upper terminal coding region and the lower terminal coding region, and all the through hole units and all the first entity units are sequentially and alternately arranged along the length direction of the grating ruler, the second type of mark comprises pattern units arranged in the upper limit coding region and the lower limit coding region and a third entity unit arranged in the upper terminal coding region and the lower terminal coding region; the detection device is fixed on the lift car and is provided with at least three first sensors and at least one second sensor which are vertically arranged, the first sensors are used for identifying the first type of identification, and the second sensors are used for identifying the second type of identification; and the controller is in communication connection with the detection device and can calculate absolute position information of the car according to detection information fed back by the first sensor and the second sensor.
When the elevator runs, the lift car drives the detection system to do vertical motion in the hoistway along the grid ruler, the first sensor collects information of a first type of identification on the grid ruler, the second sensor collects information of a second type of identification on the grid ruler, the first sensor and the second sensor send the collected information to the controller, the controller analyzes, calculates and stores the received information and analyzes binary codes corresponding to the grid ruler through which the detection device passes, so that the absolute position of the detection device in the grid ruler is distinguished, the absolute position of the lift car in the hoistway is accurately obtained, multiple corrections are not needed, and the detection technology of the position of the lift car is simplified; particularly, the controller identifies the pattern unit through the first sensor identification through hole unit, the first entity unit and the second sensor to judge that the lift car is at the limit position, so that the control of the corresponding limit position is facilitated; the controller identifies the third unit through the first sensor identification through hole unit, the second entity unit and the second sensor to judge that the lift car is at the terminal position, so that the controller can control related components to perform forced braking conveniently and prohibit the elevator from continuing to run; the mode of distinguishing the extreme position and the terminal position of the car utilizes an inspection system of the absolute position of the car, and is convenient to install and maintain. Meanwhile, by utilizing the grid ruler structure, the upper limit position area and the terminal position area at the upper end of the grid ruler are manufactured according to the special shape mark form; the lower limit area and the lower end terminal area of the grid ruler can be manufactured without the special shape mark, and the grid ruler is manufactured continuously in a coding mode of a normal position coding section until the grid ruler is shipped to an engineering site and is installed, and then an installer can use lightproof materials to shield the lower limit area and the lower end terminal area of the grid ruler according to corresponding positions of an actual hoistway and an actual car on the site; furthermore, the actual manufacturing length of the grating ruler does not need to be strictly controlled according to the size of the customer well, and the production of the grating ruler in a manufacturing plant and the installation and adjustment on the site are facilitated.
The technical solution is further explained below:
in one embodiment, at least three first sensors are arranged at intervals in the vertical direction, and when all the first sensors identify, the through hole unit or the first entity unit cannot be identified at the same time.
In one embodiment, the pattern unit comprises a full through hole unit arranged in the upper limit coding region and a full entity unit arranged in the lower limit coding region; or the pattern unit comprises a full solid unit arranged in the upper limit coding region and a full through hole unit arranged in the lower limit coding region.
In one embodiment, the first sensor and the second sensor are both photosensors;
when the first sensor detects the through hole unit, sending a first identification signal; sending a second identification signal when the first sensor detects the first entity unit and the second entity unit
When the second sensor detects the pattern unit, sending a third identification signal; and when the second sensor detects the third entity unit, sending a fourth identification signal.
In one embodiment, when the controller continuously receives the third identification signal sent by the second sensor and alternately receives the first identification signal and the second identification signal sent by the first sensor within a preset time range, the car is judged to be at the upper limit position or the lower limit position.
In one embodiment, when the controller continuously receives the fourth identification signal sent by the second sensor and continuously receives the second identification signal sent by the first sensor within a preset time range, the car is judged to be at an upper terminal position or a lower terminal position.
In one embodiment, the first sensors are three, namely A1, A2 and A3, and the second sensor is B1; the light beam phase difference of the detection device is as follows: a1 is different from A2 by 90 degrees, A2 is different from A3 by 135 degrees, A1 is different from B1 by 135 degrees, wherein the height h of the through hole unit marked by the first type is obtained by converting the phase difference of 180 degrees, and h is larger than 0.
In one embodiment, the first type of mark further comprises a plurality of first recognition units and a plurality of second recognition units which are arranged in a normal coding region, all the first recognition units and all the second recognition units are sequentially and alternately arranged along the length direction of the grating ruler to form binary coded information, the second type of mark comprises a plurality of third recognition units and a plurality of fourth recognition units which are arranged in the normal surface region, all the third recognition units and all the fourth recognition units are sequentially and alternately arranged along the length direction of the grating ruler to form mixed coded information based on the binary coded information and a Manchester code coding rule, and the mixed coded information does not repeatedly appear in the grating ruler.
In one embodiment, each of the first identification units corresponds to one of the third identification units and one of the fourth identification units, and each of the second identification units corresponds to one of the third identification units and one of the fourth identification units; and turning over the binary data from the third identification unit to the binary data 'A' corresponding to the fourth identification unit, turning over the binary data 'B' corresponding to the third identification unit from the fourth identification unit, and forming non-repeated binary data codes by binary 'A' or 'B' information with predefined digits.
In one embodiment, it is set that in time t, if the number of the first type identifiers detected by the first sensor is n, then the relative displacement s of the car is c × n, the speed v of the car is s/t, and the absolute position L of the car is | M × (c × b) -M × (c × b) |, where c is the total length of the first and second identification units in the vertical direction, b is the number of binary code bits corresponding to the binary code information plus 1, M is the decimal code corresponding to the binary code information currently read by the first sensor, and M is the decimal code corresponding to the binary code information read by the first sensor when the car is located at the lowest position in the hoistway.
On the other hand, the invention also provides an installation method of the detection system, which is based on the detection system and comprises the following steps:
(1) manufacturing a grid ruler plate comprising an upper mounting part, an upper terminal coding region, an upper limit coding region and a normal coding region according to preset production requirements, wherein the grid ruler plate is provided with a row of first type marks and a row of second type marks which are arranged in parallel along the length direction of the grid ruler plate;
(2) fixing the upper end of the grid ruler plate on the upper part of the shaft, and adjusting the mounting position of the upper mounting part to enable the upper terminal coding area to be positioned in a preset area of the shaft, wherein at the moment, the upper limit coding area and the normal coding area are also positioned, and then fixing the lower end of the grid ruler plate on the lower end of the shaft;
(3) forming a lower limit coding region and a lower terminal coding region in a mode of shielding or forming a through hole according to the actual position of the well, completing the installation and adjustment of the grid ruler plate, and obtaining a grid ruler;
(4) the detection device comprises at least three first sensors and at least one second sensor, wherein the three first sensors are used for identifying the first type of mark, and the at least one second sensor is used for identifying the second type of mark;
(5) and communicating a controller with the detection device, so that the controller can calculate absolute position information of the car according to the detection information fed back by the first sensor and the second sensor.
When the installation method is used, a grating ruler plate comprising an upper installation part, an upper terminal coding region, an upper limit coding region and a normal coding region can be manufactured firstly, and the grating ruler plate is provided with a row of first-type marks and a row of second-type marks which are arranged in parallel along the length direction of the grating ruler plate; the lower limit area and the terminal area at the lower end of the grid ruler can be manufactured without the special shape mark, the coding mode of a normal position coding section or the manufacturing is continuously carried out for all entities until the grid ruler is installed on a project site after leaving a factory, and then an installer uses a lightproof material to shield the through hole of the grid ruler to form the lower limit area and the terminal area at the lower end according to the corresponding position of an actual shaft and a car on site, or holes are dug in an entity unit to form the lower limit area and the terminal area at the lower end; furthermore, the actual manufacturing length of the grating ruler does not need to be strictly controlled according to the size of the customer well, and the production of the grating ruler in a manufacturing plant and the installation and adjustment on the site are facilitated.
Drawings
Fig. 1 is a schematic view of a car absolute position detection system with a special protection segment according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of the grating ruler structure of FIG. 1;
FIG. 3 is a schematic view of the arrangement of the detection apparatus of FIG. 1;
fig. 4 is a functional diagram of a system for detecting the absolute position of a car with a special guard segment in accordance with an embodiment of the present invention.
Description of reference numerals:
10. the elevator comprises a car, 20, a hoistway, 30, a grating scale, 31, a normal coding region, 32, an upper limit coding region, 33, a lower limit coding region, 34, an upper terminal coding region, 35, a lower terminal coding region, 36, a mounting part, 310, a first type mark, 311, a first identification unit, 312, a second identification unit, 313, a through hole unit, 314, a first entity unit, 315, a second entity unit, 320, a second type mark, 321, a third identification unit, 322, a fourth identification unit, 323, a full through hole unit, 324, a full entity unit, 325, a third entity unit, 40, a detection device, 42, a light beam, 410, a first sensor, 420, a second sensor, 50 and a controller.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The terms "first" and "second" used herein do not denote any particular order or quantity, but rather are used to distinguish one element from another.
The terms "first" and "second" in the present invention do not denote any particular quantity or order, but rather are used to distinguish one name from another.
As shown in fig. 1 to 3, the system for detecting the absolute position of the car with the special protection section in the embodiment includes: the grating ruler 30 is vertically arranged in a hoistway, the grating ruler 30 is provided with a row of first type identifiers 310 and a row of second type identifiers 320 which are arranged in parallel along the length direction of the grating ruler 30, the first type identifiers 310 and the second type identifiers 320 are matched to form absolute car position information, the grating ruler 30 comprises an upper limit coding region 32, a lower limit coding region 33, an upper terminal coding region 34 connected with the upper limit coding region 32 in a butt joint mode, and a lower terminal coding region 35 connected with the lower limit coding region 33 in a butt joint mode, the first type identifiers 310 comprise a plurality of through hole units 313 and a plurality of first entity units 314 arranged in the upper limit coding region 32 and the lower limit coding region 33, and second entity units 315 arranged in the upper terminal coding region 34 and the lower terminal coding region 35, all the through hole units 313 and all the first entity units 314 are alternately arranged in sequence along the length direction of the grating ruler 30, and the second type identifiers 320 comprise pattern units arranged in the upper limit coding region and the lower limit coding region, And a third entity unit 325 provided in the upper terminal encoding region 34 and the lower terminal encoding region 35; the detection device 40 is fixed on the car, and is provided with at least three first sensors 410 and at least one second sensor 420 which are vertically arranged, wherein the first sensors 410 are used for identifying the first type identifiers 310, and the second sensors 420 are used for identifying the second type identifiers 320; and a controller 50 connected to the detection device 40 in a communication manner, wherein the controller 50 can calculate absolute position information of the car based on the detection information fed back from the first sensor 410 and the second sensor 420.
When the elevator runs, the elevator car drives the detection system to do vertical motion in the hoistway along the grid ruler 30, the first sensor 410 collects information of the first type identifier 310 on the grid ruler 30, the second sensor 420 collects information of the second type identifier 320 on the grid ruler 30, the first sensor 410 and the second sensor 420 send the collected information to the controller 50, the controller 50 analyzes, calculates and stores the received information, and analyzes a binary code corresponding to the grid ruler 30 through which the detection device 40 passes, so that the absolute position of the detection device 40 in the grid ruler 30 is distinguished, the absolute position of the elevator car in the hoistway is accurately obtained, multiple corrections are not needed, and the detection technology of the position of the elevator car is simplified; specifically, the controller 50 determines that the car is at the limit position by recognizing the through hole unit 313 and the first physical unit 314 and the second physical unit 420 through the first sensor 410 to recognize the pattern unit, so as to control the corresponding limit position; the controller 50 identifies the through hole unit 313, the second entity unit 315 and the second sensor 420 through the first sensor 410 to identify the third unit to judge that the car is at the terminal position, so that the controller 50 controls the relevant parts to perform forced braking and forbids the elevator to continue running; the mode of distinguishing the extreme position and the terminal position of the car utilizes an inspection system of the absolute position of the car, and is convenient to install and maintain. Meanwhile, by utilizing the structure of the grid ruler 30, the upper limit position area and the terminal position area at the upper end of the grid ruler 30 are manufactured according to the special shape mark form; the lower limit area and the lower end terminal area of the grid ruler 30 can be manufactured without the special shape mark, and the manufacturing is continuously carried out in a coding mode of a normal position coding section until the grid ruler 30 is installed on the engineering site after leaving the factory, and then the installer shields the lower limit area and the lower end terminal area of the grid ruler 30 by using lightproof materials according to the corresponding positions of the actual hoistway and the actual car on the site; further, the actual manufacturing length of the grating ruler 30 does not need to be strictly controlled according to the size of the customer hoistway, and the grating ruler is beneficial to the production of the grating ruler 30 in a manufacturing plant and the installation and adjustment in the field.
On the basis of the above embodiment, as shown in fig. 3, at least three first sensors 410 are arranged at intervals in the vertical direction, and when all the first sensors 410 perform identification, the through hole unit 313 or the first entity unit 314 is not identified at the same time. Furthermore, the signals of the first sensor 410 received by the controller 50 are not the same, so that the absolute position information of the car can be obtained through analysis and calculation, the position of the through hole unit 313 and the position of the first entity unit 314 can be more accurately identified by the first sensor 410, and self-checking is facilitated.
On the basis of the above embodiment, the pattern unit includes a full via unit 323 disposed in the upper limit coding region and a full entity unit 324 disposed in the lower limit coding region; or the pattern unit comprises a full solid unit 324 arranged in the upper limit coding region and a full through hole unit 323 arranged in the lower limit coding region. And then can shield according to the actual need of field debugging and form the unit 324 of the whole entity, facilitate the site operation. Further, the first sensor 410 and the second sensor 420 are both photoelectric sensors; when the first sensor 410 detects the through hole unit 313, a first identification signal is transmitted; when the first sensor 410 detects the first entity unit 314 and the second entity unit 315, sending a second identification signal; when the second sensor 420 detects the pattern unit, a third identification signal is sent; when the second sensor 420 detects the third entity unit 325, a fourth identification signal is sent; and then the position of the elevator car is identified according to the obtained different detection signals, the control operation of the related limit position or the terminal position is carried out in time, and the safe operation of the elevator car is guaranteed. Specifically, when the controller 50 continuously receives the third identification signal sent by the second sensor 420 and alternately receives the first identification signal and the second identification signal sent by the first sensor 410 within a preset time range, it determines that the car is at the upper limit position or the lower limit position; when the controller 50 continuously receives the fourth identification signal sent by the second sensor 420 and continuously receives the second identification signal sent by the first sensor 410 within the preset time range, it is determined that the car is at the upper terminal position or the lower terminal position. And then utilize the first identification signal that first sensor 410 sent to combine the third identification signal that second sensor 420 sent to judge the extreme position of this car, utilize the second identification signal that first sensor 410 sent to combine the fourth identification signal that second sensor 420 sent to judge the terminal position of this car, compare with current detection technology, simplified the detection part greatly, reduce elevator cost, also be convenient for later stage installation maintenance simultaneously. Meanwhile, the upper limit position or the lower limit position can be distinguished by using the full through hole unit 323 and the full entity unit 324, the detection programming operation is simple, and the identification control is easy.
Specifically, as shown in fig. 3, three first sensors 410 are provided, which are a1, a2 and A3, respectively, and the second sensor 420 is B1; the phase difference of the light beam 42 of the detection device 40 is: the difference between A1 and A2 is 90 degrees, the difference between A2 and A3 is 135 degrees, and the difference between A1 and B1 is 135 degrees, wherein the height h of the through hole unit 313 of the first-type identifier 310 is converted by 180 degrees of phase difference, and h is greater than 0. This arrangement ensures that the through-hole cells or the solid cells of the normal code regions are not simultaneously recognized by a1, a2, A3, and that there is a sufficient margin to prevent false detection. It should be noted that, the distance is defined as a reference angle value, and the distance between the sensors is calculated by using the angle, which is convenient for conversion; if h is 4mm 180 °, 90 ° -2 mm, 135 ° -3 mm.
On the basis of any of the above embodiments, the first-type identifier 310 further includes a plurality of first identification units 311 and a plurality of second identification units 312 disposed in the normal encoding region 31, all the first identification units 311 and all the second identification units 312 are sequentially and alternately arranged along the length direction of the scale 30 to form binary encoded information, the second-type identifier 320 includes a plurality of third identification units 321 and a plurality of fourth identification units 322 disposed in the normal surface region, all the third identification units 321 and all the fourth identification units 322 are sequentially and alternately arranged along the length direction of the scale 30 to form mixed encoded information based on the binary encoded information and the manchester code encoding rule, and the mixed encoded information does not repeatedly appear in the scale 30. Further, the first identification unit 311 and the second identification unit 312 form a repeated and equal-proportion binary code, and thus belong to symmetric codes; the mixed coding of the third recognition unit 321 and the fourth recognition unit 322 is utilized, and the Manchester code adopts the inversion rules of '0' and '1' to respectively represent binary '0' or '1', so that the Manchester code is also a symmetric coding; namely, the whole grating ruler 30 is composed of two rows of symmetrical codes, so that the whole grating ruler 30 has better mechanical symmetry performance; in addition, the mixed encoding processed by the Manchester code encoding rule can realize no repeated appearance in the same grating ruler 30. Therefore, the scale 30 realizes the recording of the non-repeated absolute position code and the symmetry of the overall mechanical characteristics of the scale 30, and improves the detection accuracy of the car absolute position detection. Furthermore, each first identification unit 311 corresponds to a third identification unit 321 and a fourth identification unit 322, and each second identification unit 312 corresponds to a third identification unit 321 and a fourth identification unit 322; the binary data is inverted from the third recognition unit 321 to the fourth recognition unit 322 corresponding to "a" in the binary data, and is inverted from the fourth recognition unit 322 to the third recognition unit 321 corresponding to "B" in the binary data, and the binary data encoding is composed of binary "a" or "B" information of a predefined number of bits without repetition. If the state of the hole "0" is inverted to the state of the non-hole "1" corresponds to the binary data "1" and the state of the hole "0" is inverted from the non-hole "1", the binary data is the mixed code information of the predetermined manchester code and the binary code, the mixed code information realizes the symmetry of the original asymmetrical binary data, and then two rows of symmetrical code information can be arranged on the grating ruler 30, and the absolute position information of the car can be formed by the two code information.
Further, it is set that within the time t, the number of the first type identifiers 310 detected by the first sensor 410 is n, then the relative displacement s of the car is c × n, the speed v of the car is s/t, and the absolute position L of the car is | M × (c × b) -M × (c × b) |, where c is the total length of the first recognition unit 311 and the second recognition unit 312 in the vertical direction, b is the binary code number corresponding to the binary code information plus 1, M is the decimal code corresponding to the binary code information currently read by the first sensor 410, and M is the decimal code corresponding to the binary code information read by the first sensor 410 when the car is located at the lowest position in the hoistway.
The embodiment also provides an installation method of the detection system, which is based on the detection system and comprises the following steps:
(1) manufacturing a grid ruler plate comprising an upper mounting part, an upper terminal coding region, an upper limit coding region and a normal coding region according to preset production requirements, wherein the grid ruler plate is provided with a row of first type marks and a row of second type marks which are arranged in parallel along the length direction of the grid ruler plate;
(2) fixing the upper end of the grid ruler plate on the upper part of the shaft, and adjusting the mounting position of the upper mounting part to enable the upper terminal coding area to be positioned in a preset area of the shaft, wherein the upper limit coding area and the normal coding area are also positioned at the moment, and then fixing the lower end of the grid ruler plate on the lower end of the shaft;
(3) forming a lower limit coding region and a lower terminal coding region in a mode of shielding or forming a through hole according to the actual position of the well, completing the installation and adjustment of the grid ruler plate, and obtaining a grid ruler;
(4) the detection device comprises at least three first sensors and at least one second sensor, wherein the three first sensors are used for identifying the first type of mark, and the at least one second sensor is used for identifying the second type of mark;
(5) and communicating a controller with the detection device, so that the controller can calculate absolute position information of the car according to the detection information fed back by the first sensor and the second sensor.
When the installation method is used, a grating ruler plate comprising an upper installation part, an upper terminal coding region, an upper limit coding region and a normal coding region can be manufactured firstly, and the grating ruler plate is provided with a row of first-type marks and a row of second-type marks which are arranged in parallel along the length direction of the grating ruler plate; the lower limit area and the terminal area at the lower end of the grid ruler can be manufactured without the special shape mark, the coding mode of a normal position coding section or the manufacturing is continuously carried out for all entities until the grid ruler is installed on a project site after leaving a factory, and then an installer uses a lightproof material to shield the through hole of the grid ruler to form the lower limit area and the terminal area at the lower end according to the corresponding position of an actual shaft and a car on site, or holes are dug in an entity unit to form the lower limit area and the terminal area at the lower end; furthermore, the actual manufacturing length of the grating ruler does not need to be strictly controlled according to the size of the customer well, and the production of the grating ruler in a manufacturing plant and the installation and adjustment on the site are facilitated.
In this embodiment, the lower end of the grid ruler plate, i.e., the lower terminal coding region and the lower limit coding region, are manufactured by using the through hole forming rule of the normal coding region, and after the upper end of the grid ruler plate is fixed, the redundant through holes are shielded by using the opaque material according to the actual position of the hoistway to obtain the lower limit coding region and the lower terminal coding region.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A system for detecting the absolute position of a car with a special protection section is characterized by comprising:
the elevator car elevator comprises a grating ruler which is vertically arranged in a hoistway, wherein the grating ruler is provided with a row of first type identifications and a row of second type identifications which are arranged in parallel along the length direction of the grating ruler, the first type identifications and the second type identifications are matched to form absolute position information of a car, the grating ruler comprises an upper limit coding region, a lower limit coding region, an upper terminal coding region butted with the upper limit coding region and a lower terminal coding region butted with the lower limit coding region, the first type identifications comprise a plurality of through hole units and a plurality of first entity units which are arranged in the upper limit coding region and the lower limit coding region, and second entity units which are arranged in the upper terminal coding region and the lower terminal coding region, and all the through hole units and all the first entity units are sequentially and alternately arranged along the length direction of the grating ruler, the second type of mark comprises pattern units arranged in the upper limit coding region and the lower limit coding region and a third entity unit arranged in the upper terminal coding region and the lower terminal coding region;
the detection device is fixed on the lift car and is provided with at least three first sensors and at least one second sensor which are vertically arranged, the first sensors are used for identifying the first type of identification, and the second sensors are used for identifying the second type of identification; and
and the controller is in communication connection with the detection device and can calculate absolute position information of the car according to detection information fed back by the first sensor and the second sensor.
2. The detection system according to claim 1, wherein at least three first sensors are arranged at intervals in a vertical direction, and when all the first sensors perform identification, the through-hole unit or the first solid unit is not identified at the same time.
3. The detection system according to claim 1, wherein the pattern unit comprises a full through hole unit disposed in the upper limit coding region and a full solid unit disposed in the lower limit coding region; or the pattern unit comprises a full solid unit arranged in the upper limit coding region and a full through hole unit arranged in the lower limit coding region.
4. The detection system of claim 3, wherein the first sensor and the second sensor are both photosensors;
when the first sensor detects the through hole unit, sending a first identification signal; sending a second identification signal when the first sensor detects the first entity unit and the second entity unit
When the second sensor detects the pattern unit, sending a third identification signal; and when the second sensor detects the third entity unit, sending a fourth identification signal.
5. The detection system according to claim 4, wherein the controller determines that the car is at the upper limit position or the lower limit position when the controller continuously receives the third identification signal transmitted by the second sensor and alternately receives the first identification signal and the second identification signal transmitted by the first sensor within a preset time range.
6. The detection system according to claim 5, wherein the controller determines that the car is at the upper terminal position or the lower terminal position when the controller continuously receives the fourth identification signal transmitted by the second sensor and continuously receives the second identification signal transmitted by the first sensor within a preset time range.
7. The detection system of claim 4, wherein the first sensors are three, a1, a2, A3, and the second sensors are B1; the light beam phase difference of the detection device is as follows: the difference between A1 and A2 is 90 degrees, the difference between A2 and A3 is 135 degrees, and the difference between A1 and B1 is 135 degrees, wherein the height h of the through hole unit identified by the first type is converted by 180 degrees of phase difference, and h is greater than 0.
8. The detection system according to any one of claims 1 to 7, wherein the first type of mark further comprises a plurality of first identification units and a plurality of second identification units which are arranged in a normal coding region, all the first identification units and all the second identification units are sequentially and alternately arranged along the length direction of the grating scale to form binary coded information, the second type of mark comprises a plurality of third identification units and a plurality of fourth identification units which are arranged in the normal surface region, all the third identification units and all the fourth identification units are sequentially and alternately arranged along the length direction of the grating scale to form mixed coded information based on the binary coded information and a Manchester code coding rule, and the mixed coded information does not repeatedly appear in the grating scale.
9. The detecting system according to claim 8, wherein each of the first identification units corresponds to one of the third identification units and one of the fourth identification units, and each of the second identification units corresponds to one of the third identification units and one of the fourth identification units; and turning over the binary data from the third identification unit to the binary data 'A' corresponding to the fourth identification unit, turning over the binary data 'B' corresponding to the third identification unit from the fourth identification unit, and forming non-repeated binary data codes by binary 'A' or 'B' information with predefined digits.
10. The detecting system according to claim 8, wherein, when the number of the first type identifiers detected by the first sensor is n within a time t, the relative displacement s of the car is c × n, the speed v of the car is s/t, and the absolute position L of the car is | M × (c × b) -M × (c × b) |, where c is the total length of the first and second identifying units in the vertical direction, b is the number of binary codes corresponding to the binary code information plus 1, M is the decimal code corresponding to the binary code information currently read by the first sensor, and M is the decimal code corresponding to the binary code information read when the first sensor reads that the car is located at the hoistway position.
11. A method for installing a test system, based on a test system according to any one of claims 1 to 8, comprising the steps of:
(1) manufacturing a grid ruler plate comprising an upper mounting part, an upper terminal coding region, an upper limit coding region and a normal coding region according to preset production requirements, wherein the grid ruler plate is provided with a row of first type marks and a row of second type marks which are arranged in parallel along the length direction of the grid ruler plate;
(2) fixing the upper end of the grid ruler plate on the upper part of the shaft, and adjusting the mounting position of the upper mounting part to enable the upper terminal coding area to be positioned in a preset area of the shaft, wherein the upper limit coding area and the normal coding area are also positioned at the moment, and then fixing the lower end of the grid ruler plate on the lower end of the shaft;
(3) forming a lower limit coding region and a lower terminal coding region in a mode of shielding or forming a through hole according to the actual position of the well, completing the installation and adjustment of the grid ruler plate, and obtaining a grid ruler;
(4) the detection device comprises at least three first sensors and at least one second sensor, wherein the three first sensors are used for identifying the first type of mark, and the at least one second sensor is used for identifying the second type of mark;
(5) and communicating a controller with the detection device, so that the controller can calculate absolute position information of the car according to the detection information fed back by the first sensor and the second sensor.
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| CN110683437A (en) * | 2019-10-08 | 2020-01-14 | 广州广日电梯工业有限公司 | Semi-automatic learning system and method for elevator shaft floor position information |
| CN110806227B (en) * | 2019-11-01 | 2021-06-15 | 北京北一法康生产线有限公司 | Information belt detecting system for elevator |
| CN112299196B (en) * | 2020-10-12 | 2022-07-26 | 广州广日电梯工业有限公司 | Elevator guide rail system with position detection function and position detection method |
| CN113666210B (en) * | 2021-08-16 | 2023-03-28 | 杭州西奥电梯有限公司 | Debugging method for absolute position control system |
| CN113566708A (en) * | 2021-08-16 | 2021-10-29 | 重庆远视科技有限公司 | Position determination device and ophthalmologic apparatus |
| CN115466666A (en) * | 2022-09-27 | 2022-12-13 | 泸州老窖股份有限公司 | Rack elevator with multidirectional conveying function |
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