An ETS-based car position detection device

Abstract

The utility model discloses a car position detection device based on ETS, including installing multiple detection board in elevator shaft and installing two groups of sensor components on the car, one end of sensor component electric connection has ETS controller, multiple detection board equidistance distribution in the upper end and lower end of shaft, be equipped with the opening for two groups of sensor components accurate positioning response of opening of detection board, the utility model discloses the cooperation of ETS controller and two groups of sensor components and multiple detection board, will multiple detection board equidistance distribution in the upper end and lower end of shaft, will sensor component fixed on the car, when the car moves in the shaft, the opening position of detection board and two sensor components are alternately shielded the pulse signal generated by sensor component, double sensor component independent access ETS controller, utilizes EST controller analysis and judges car position, has improved car position detection precision, can also guarantee the reliability of mechanical parts simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of elevators, specifically to a car position detection device based on ETS. Background Technology

[0002] During elevator operation, in order to prevent the car from overshooting or undershooting, it is necessary to detect the car position to ensure the safety of passengers. Currently, the car position detection method usually uses ETS switch components to control the position detection of the elevator car at the upper and lower ends of its travel in the elevator shaft.

[0003] For example, Chinese patent application number 201621036127.X discloses an ETS switch assembly for elevators, including a housing, a detection circuit, a connecting rod, and a roller. The detection circuit is located inside the housing. The housing includes a mounting base and a cover on the mounting base. A rotating shaft is provided on the mounting base, with one end of the shaft mounted on a movable seat inside the mounting base and the other end extending outside the mounting base. One end of the connecting rod is located on the end of the rotating shaft extending outside the mounting base. A return spring is sleeved on the end of the rotating shaft extending outside the mounting base, with one end of the return spring mounted on the mounting base and the other end mounted on the connecting rod. A connecting shaft is provided at the other end of the connecting rod, and the roller is mounted on the connecting shaft. The connecting rod can drive the movable seat to move, thereby disconnecting the detection circuit located inside the housing. This utility model can accurately detect the position of the elevator car at the upper and lower ends of the elevator shaft, with high safety performance and long service life.

[0004] However, after long-term use, mechanical components such as connecting rods, shafts, and rollers may wear out. This wear will affect the contact accuracy between the rollers and the hoistway end stop, resulting in inaccurate position detection signals and thus affecting the accurate judgment of the car position. Therefore, we need to propose a car position detection device based on ETS to solve the above-mentioned problems, so as to improve the accuracy of car position detection and ensure the reliability of mechanical components. Utility Model Content

[0005] The purpose of this invention is to provide a car position detection device based on ETS, which can improve the accuracy of car position detection and ensure the reliability of mechanical components, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a car position detection device based on ETS, comprising multiple detection plates installed in the elevator shaft and two sets of sensor assemblies installed on the car. One end of each sensor assembly is electrically connected to an ETS controller. The multiple detection plates are equidistantly distributed at the upper and lower ends of the shaft. Each detection plate has an opening for precise positioning and sensing by the two sets of sensor assemblies, and the positions of the two sets of sensor assemblies and the opening on the detection plate are alternately arranged.

[0007] Preferably, the sensor assembly includes a connecting bracket mounted to the car support beam and photoelectric sensors mounted on the connecting bracket. Two sets of photoelectric sensors are mounted vertically at a distance from each other on the side wall of the car, and the distance between the detection lines of the two sets of photoelectric sensors is 40mm.

[0008] Preferably, the photoelectric sensor is configured as a U-shaped photoelectric sensor, and one end of the detection plate is located in the U-shaped groove of the photoelectric sensor.

[0009] Preferably, the reference length of the opening is set to L, the spacing between the photoelectric sensors is less than the reference length L of the opening, the distance between the lower side of the opening on the detection plate at the upper end of the well is L, and the distance between the upper side of the opening on the detection plate at the lower end of the well is L.

[0010] Preferably, the connecting bracket includes a first bracket fixed to the car support beam, a second bracket is bolted to one side of the first bracket, the photoelectric sensor is fixed on the second bracket, and a first pad is provided between the second bracket and the photoelectric sensor.

[0011] Preferably, the detection plate is L-shaped, and the folded edge of the detection plate is fixed with a third bracket for connection with the guide rail clamp by bolts.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model utilizes the cooperation of an ETS controller with two sets of sensor components and multiple detection plates. Multiple detection plates are evenly distributed at the upper and lower ends of the hoistway, and the sensor components are fixed on the car. When the car moves in the hoistway, the opening position of the detection plate alternately blocks the pulse signal generated by the two sensor components. The dual sensor components are independently connected to the ETS controller, and the car position is analyzed and determined by the ETS controller, which improves the accuracy of car position detection and ensures the reliability of mechanical components. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the sensor assembly structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the sensor assembly and detection board installation structure of this utility model;

[0016] Figure 3 This is a schematic diagram showing the shape of the detection plates at the upper and lower ends of the well shaft of this utility model;

[0017] Figure 4 This is a schematic diagram showing the installation of multiple detection plates within the wellbore of this utility model;

[0018] Figure 5 This is a schematic diagram of the overall layout of the detection plate of this utility model;

[0019] Figure 6 This is a schematic diagram of the pulse signal detected in the upper region when the car rises according to this utility model;

[0020] Figure 7 This is a schematic diagram illustrating the detection of pulse signals in the lower region during the descent of the car according to this utility model;

[0021] Figure 8 This is a schematic diagram of the ETS controller circuit of this utility model.

[0022] In the diagram: 11. Detection plate; 12. Third bracket; 13. Guide rail clamp; 14. Well guide rail; 15. Second pad; 21. Photoelectric sensor; 22. Second bracket; 23. First bracket; 24. Support beam; 25. First pad. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-8This utility model provides a technical solution: an ETS-based car position detection device, including multiple detection plates 11 installed in the elevator shaft and two sets of sensor assemblies installed on the car. One end of each sensor assembly is electrically connected to an ETS controller. The multiple detection plates 11 are equidistantly distributed at the upper and lower ends of the shaft. Each detection plate 11 has an opening for precise positioning and sensing by the two sets of sensor assemblies. The positions of the two sets of sensor assemblies and the opening on the detection plate 11 are alternately arranged. The multiple detection plates 11 are equidistantly distributed at the upper and lower ends of the shaft, and the sensor assemblies are fixed on the car. When the car moves in the shaft, the opening position of the detection plate 11 and the two sensor assemblies alternately block the pulse signals generated by the sensor assemblies. The dual sensor assemblies are independently connected to the ETS controller. The ETS controller is used to analyze and determine the car position, which improves the accuracy of car position detection and ensures the reliability of mechanical components.

[0025] The sensor assembly includes a connecting bracket installed with the car support beam 24 and photoelectric sensors 21 installed on the connecting bracket. Two sets of photoelectric sensors 21 are installed vertically at a distance from each other on the side wall of the car. The distance between the detection lines of the two sets of photoelectric sensors 21 is 40mm, so that when the photoelectric sensors 21 move to the detection plate 11, one photoelectric sensor 21 can be aligned with the opening of the detection plate 11, and the other photoelectric sensor 21 is aligned with the unopened part of the detection plate 11. By utilizing the complementary cooperation of the two photoelectric sensors 21, the position of the car can be accurately detected.

[0026] The photoelectric sensor 21 is configured as a U-shaped photoelectric sensor 21. One end of the detection plate 11 is located in the U-shaped groove of the photoelectric sensor 21, which facilitates the movement of the detection plate 11 within the U-shaped groove. One end of the U-shaped groove is a transmitter (such as an infrared LED), and the other end is a receiver (such as a phototransistor). When the transmitter emits light, if there is no object blocking the light path, the light will directly illuminate the receiver, and the receiver will generate an electrical signal (such as a high level). When the detection plate 11 passes through the U-shaped groove and blocks the light path, the light intensity received by the receiver is weakened, and the electrical signal changes (such as a low level), thereby triggering the detection signal.

[0027] The reference length of the opening is set to L. The spacing between the photoelectric sensors 21 is less than the reference length L of the opening. For example, if the spacing between the photoelectric sensors is D, then D = 0.8L. The distance between the lower side of the opening on the detection plate 11 at the upper end of the well and the lower edge of the detection plate 11 is L. The distance between the upper side of the opening on the detection plate 11 at the lower end of the well and the upper edge of the detection plate 11 is L.

[0028] For example, 30 detection plates 11 are installed in the shaft, with 15 plates at each of the upper and lower ends of the shaft. The reference length of the opening is L. Then, the solid length of the detection plate 11 is: solid segment (length L) + opening segment (length L) + solid segment (length L1 = (N+1)*L), where N is the number of plates, starting from the end layer side, N = 1, 2, 3, ...; if L = 50, the shape of the detection plate 11 is as follows. Figure 3 As shown, Figure 3 The left side shows the shape of the detection plate 11 located at the upper end of the shaft. Figure 3 The right side shows the shape of the detection plate 11 located at the lower end of the shaft; for example... Figure 4 The diagram shows the installation of multiple detection plates 11 within the shaft. Four detection plates 11 are installed at the upper and lower ends of the shaft, respectively. In the diagram, ETS-1U, ETS-2U, ETS-3U, and ETS-4U are the opening configurations of the detection plates at the upper end of the shaft, while ETS-1D, ETS-2D, ETS-3D, and ETS-4D are the opening configurations of the detection plates at the lower end of the shaft. The interval between detection plates 11 and the next detection plate 11 should be more than 2L. The response time of the photoelectric sensor 21 (the output after detecting the plate) should be less than 1ms. The pulse amplitude TL of the signal with the reference length L of the detection plate 11 should be more than 3ms. Two photoelectric sensors 21 are set vertically, and the interval between the photoelectric sensors 21 should be less than the reference length of the plate.

[0029] like Figure 5 The diagram shows the overall arrangement of the detection plate 11. When the car moves, the detection plate 11 can pass through the U-shaped grooves of the photoelectric sensor 21A and the photoelectric sensor 21B. The detection plate 11 at the upper end of the shaft and the detection plate 11 at the lower end of the shaft are symmetrically arranged with the shaft center as the axis. When the car moves, the solid part and the opening part of the detection plate 11 alternately block the pulse signal generated by the optical path of the photoelectric sensor 21. The pulse signal is transmitted to the ETS controller, which makes it easier for the ETS controller to accurately calculate the position of the car.

[0030] like Figure 6 The image shows the pulse signal detected in the upper region when the car is rising. Figure 7 To detect pulse signals in the lower area when the car descends;

[0031] like Figure 8 As shown, the ETS controller includes CPU-A and CPU-B, which are connected to each other. Both CPU-A and CPU-B are connected to two photoelectric sensors via MOS switches. The ETS controller is used as a forced deceleration device for the terminal layer. When it detects a state where the position and speed of the car are not commensurate (overspeed state), it can cut off the power to the motor and brake, so that the speed of the car is limited to a safe range before reaching the terminal buffer.

[0032] The connecting bracket includes a first bracket 23 fixed to the car support beam 24. A second bracket 22 is bolted to one side of the first bracket 23. The photoelectric sensor 21 is fixed on the second bracket 22. A first pad 25 is provided between the second bracket 22 and the photoelectric sensor 21. The first pad 25 is a rubber pad. The first pad 25 provides shock absorption protection for the photoelectric sensor 21, prevents stress from causing operation of the photoelectric sensor 21, and improves the service life of the photoelectric sensor 21.

[0033] The detection plate 11 is L-shaped. The folded edge of the detection plate 11 is fixed with a third bracket 12 for connecting with the guide rail clamp 13 by bolts. The guide rail clamp 13 is installed on the well guide rail 14. A second pad 15 is installed at the connection between the third bracket 12 and the guide rail. The second pad 15 is a rubber plate, which is used to improve the stability of the well guide rail 14 installation.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ETS-based car position detection apparatus, characterized by: The system includes multiple detection plates (11) installed in the elevator shaft and two sets of sensor assemblies installed on the car. One end of each sensor assembly is electrically connected to an ETS controller. The multiple detection plates (11) are equidistantly distributed at the upper and lower ends of the shaft. Each detection plate (11) has an opening for the two sets of sensor assemblies to accurately position and sense the sensor. The positions of the two sets of sensor assemblies and the opening on the detection plate (11) are alternately arranged.

2. An ETS-based car position detection apparatus according to claim 1, characterized by: The sensor assembly includes a connecting bracket installed with the car support beam (24) and photoelectric sensors (21) installed on the connecting bracket. Two sets of photoelectric sensors (21) are installed vertically at a distance from each other on the side wall of the car, and the distance between the detection lines of the two sets of photoelectric sensors (21) is 40mm.

3. The car position detection device based on ETS according to claim 2, characterized in that: The photoelectric sensor (21) is configured as a U-shaped photoelectric sensor (21), and one end of the detection plate (11) is located in the U-shaped groove of the photoelectric sensor (21).

4. The car position detection device based on ETS according to claim 3, characterized in that: The reference length of the opening is set to L. The spacing between the photoelectric sensors (21) is less than the reference length L of the opening. The distance between the lower side of the opening on the detection plate (11) at the upper end of the well and the lower edge of the detection plate (11) is L. The distance between the upper side of the opening on the detection plate (11) at the lower end of the well and the upper edge of the detection plate (11) is L.

5. The car position detection device based on ETS according to claim 4, characterized in that: The connecting bracket includes a first bracket (23) fixed to the car support beam (24), a second bracket (22) is bolted to one side of the first bracket (23), the photoelectric sensor (21) is fixed on the second bracket (22), and a first pad (25) is provided between the second bracket (22) and the photoelectric sensor (21).

6. The car position detection device based on ETS according to claim 1, characterized in that: The detection plate (11) is L-shaped, and the folded edge of the detection plate (11) is fixed with a third bracket (12) for connection with the guide rail clamp (13) by bolts.

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