Floor absolute position detection system and method for elevator in power failure

Abstract

The invention discloses an elevator floor absolute position detection system and method for power failure, and the system comprises an elevator control system IC1, a hoistway absolute position controller, an N floor system door area interval, an elevator car roof control panel and a main control panel. Integrated hoistway signals are adopted, and original upper forced signals, lower forced signals and door area signals are integrated through circuits; wiring is greatly reduced, and installation is simpler; and meanwhile, physical position confirmation signals such as magnetic latching gate area signals, laser ranging and atmospheric pressure height measurement are integrated. When the elevator loses efficacy or is recovered due to power failure, the elevator control system firstly exchanges information with the detection system so as to confirm the real physical position of the elevator, after comparison, calibration and check, after passengers call the elevator, the elevator does not return to a base station to operate, but is directly started to respond to a target floor, the efficiency is high, and the elevator taking feeling is good.

Description

Technical Field

[0001] The present invention belongs to the technical field of elevator floor detection, and particularly relates to a system and method for detecting the absolute position of an elevator floor during a power outage. Background Art

[0002] Existing elevator shaft signals include upper forced signals, lower forced signals, and door area signals. Therefore, an elevator shaft system usually includes a set of upper forced devices, a set of lower forced devices, a set of door area switch devices, and various proximity switches or photoelectric switches, which have problems such as a large number of components, a large number of wirings, and complex installation. Moreover, when the system fails or loses power, the elevator slips, jumps, or runs away, resulting in a deviation between the actual physical position of the elevator and the original recorded position of the system. In this case, the displayed floor of the elevator is inconsistent with the position of the elevator shaft, usually resulting in misaligned operation or the elevator automatically returning to the base station of the elevator for correction. On the one hand, it wastes time and has low efficiency; on the other hand, passengers are frightened because the elevator does not run towards the target floor, resulting in a very poor riding experience for users. Summary of the Invention

[0003] In order to make up for the deficiencies of the prior art, the present invention provides a system and method for detecting the absolute position of an elevator floor during a power outage to accurately confirm the physical position of the elevator.

[0004] The technical problems solved by the present invention can be realized by the following technical solutions:

[0005] On the one hand, a system for detecting the absolute position of an elevator floor during a power outage is claimed, including an elevator control system IC1, a shaft absolute position controller, an N-floor system door area interval, an elevator car top control board, and a main control board.

[0006] The shaft absolute position controller transmits the shaft position signals obtained by it to the car top control board and the main control board through a communication interface and communication lines. The shaft absolute position controller is a magnetoelectric detection device, including two magnetic switches, three photoelectric switches, and a shaft control system IC2.

[0007] The elevator control system IC1 is used to manage the functions and data of elevator operation, including the main control logic chip of the elevator. The shaft control system IC2 includes a shaft data collection chip. The elevator control system IC1 confirms the shaft position after collecting through the shaft control system IC2.

[0008] The N-floor system door area interval includes an N-floor shaft position door area plug board and a position interval, and the N-floor shaft position door area plug board corresponds to the position interval.

[0009] Further, the elevator control system IC1 includes two data managements, one for real-time data management and one for shaft original database management.

[0010] Further, the hoistway control system IC2 is used to manage data related to the absolute position of the hoistway, including landing zone data and floor position data.

[0011] Further, the two magnetic switches are denoted as switch 1 and switch 2, and the three optoelectronic switches are denoted as switch 3, switch 4, and switch 5. If any one of switch 1 and switch 2 is turned on, it indicates entering the landing zone insert plate; when switch 1 and switch 2 are both in the ON state within the position interval, that is, when both are turned on simultaneously, it is one of the necessary conditions for the elevator to stop and open the door; switch 3 is used to confirm the actual floor of the elevator, and when entering the position interval, it is used to eliminate errors and confirm signal filtering; switches 4 and 5 are used to correct the inaccurate leveling of the elevator caused by the elongation or shortening of the wire rope when people enter and exit after the elevator stops normally.

[0012] Further, the landing zone insert plate is a multi-functional insert plate, which is the actual landing zone of the elevator. Only when the actual landing zone and the system landing zone exist simultaneously can the elevator open and close the door normally.

[0013] On the other hand, the present invention also claims a detection method for the absolute position detection system of an elevator floor during a power outage, and the specific steps are as follows:

[0014] S1. After the elevator power outage and power-on, the elevator control system IC1 first judges whether the elevator state meets the start condition. If it cannot be started and run, it directly reports a fault and waits for the maintenance personnel to repair.

[0015] S2. If it is judged that it can run, the elevator control system IC1 will judge whether the elevator can run normally at high speed based on the system data before the power outage and the data read by the hoistway control system IC2 after the power outage. If it can, it will be directly started. If not, it will directly switch to low-speed start and run.

[0016] S3. Whether in the high-speed start mode or the low-speed start mode, the detection system has entered the normal operation mode of the elevator.

[0017] S4. When the elevator enters the normal operation mode, there are two states when the elevator passes through the system landing zone interval of N floors: continuing to run or decelerating and entering the landing zone to stop. The absolute floor confirmation logic for the two states is the same. The real-time database of the elevator control system IC1 is compared with the hoistway control system IC2 in real time. First, it is confirmed whether the floor data N is correct. When the two data are inconsistent, the elevator control system IC1 corrects the floor data in the real-time database of the elevator control system IC1 to N according to the data of the hoistway control system IC2; after the correction is completed, it enters the next process; when the two data are consistent, it directly enters the next process.

[0018] S5. The elevator control system IC1 calls the original hoistway library data to update the hoistway real-time data to ensure that the elevator obtains the absolute position in real time.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] (1) The present invention adopts an integrated hoistway signal, and integrates the original up-forced signal, down-forced signal, and door area signal through circuit integration (the up-forced signal, down-forced signal, and door area signal are all sent by the hoistway absolute position controller), greatly reducing the wiring and making the installation simpler; at the same time, it also integrates the magnetic holding door area signal, which can also cooperate with physical position confirmation signals such as laser ranging and atmospheric pressure measurement. When the elevator fails or the power is restored after power failure, the elevator control system first exchanges information with the detection system (the control system IC1 will ask the detection system about the currently stored floor position and whether it has obtained well shaft signals such as door area signals, forced speed change signals, and real physical floor position signals) to confirm the real physical position of the elevator. After comparison, calibration, and verification, when a passenger calls the elevator, the elevator will not return to the base station for operation, but will directly start to respond to the destination floor, with high efficiency and good riding experience. The method of the present invention can ensure that the elevator will not run on the wrong floor and will not return to the base station for operation, achieving low cost, convenient installation, safety, reliability, accuracy, high efficiency, and good riding experience, and solving technical problems such as frequent customer complaints in the industry.

[0021] (2) The detection system of the present invention is used for integrated acquisition of vertical running elevator hoistway signals. When the elevator control system loses power or fails and the elevator undergoes physical position movement, it can still ensure that after the system resumes normal operation, it can accurately retrieve the real physical position of the elevator in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the detection system of the present invention;

[0023] Figure 2 is a flowchart of the operation of the elevator after normal stop of the present invention;

[0024] Figure 3 is a flowchart of the operation of the elevator after abnormal stop of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] To enable those skilled in the art to more clearly understand the technical solutions of the present application, the following further describes a system and method for detecting the absolute position of elevator floors during power failure of the present invention with reference to the accompanying drawings.

[0026] Such as Figure 1As shown in the figure, a system for detecting the absolute position of elevator floors during a power outage includes an elevator control system IC1, a hoistway absolute position controller, an N-floor system door area interval, an elevator car top control board, and a main control board. The hoistway absolute position controller transmits the hoistway position signal it obtains to the car top control board and the main control board through a communication interface and communication lines. The hoistway absolute position controller is a magnetoelectric detection device, including two magnetic switches, three photoelectric switches, and a hoistway control system IC2. The elevator control system IC1 is used to manage the functions and data of elevator operation, including the main control logic chip of the elevator. The hoistway control system IC2 includes a hoistway data collection chip. The elevator control system IC1 confirms the hoistway position after collecting data through the hoistway control system IC2. The N-floor system door area interval includes an N-floor hoistway position door area plug board and a position interval. The N-floor hoistway position door area plug board corresponds to the position interval. The door area plug board is a multi-functional plug board, which is the real door area of the elevator. Only when the real door area and the system door area exist at the same time can the elevator open and close the door normally. The system door area refers to the door area data stored in the elevator control system IC1. Due to reasons such as wire rope slippage during operation, the data of this door area may deviate from the real door area.

[0027] Specifically, the elevator control system IC1 includes two data managements, one for real-time data management and one for hoistway original database management. The hoistway control system IC2 is used to manage data related to the absolute position of the hoistway, including door area data and floor position data. The two magnetic switches are denoted as switch 1 and switch 2, and the three photoelectric switches are denoted as switch 3, switch 4, and switch 5. If any one of switch 1 and switch 2 is turned on, it means entering the door area plug board. When switch 1 and switch 2 are both in the ON state in the position interval, that is, when both are turned on at the same time, it is one of the necessary conditions for the elevator to stop and open the door. Switch 3 is used to confirm the real floor of the elevator, and when entering the position interval, it is used to eliminate errors and perform signal filtering and confirmation. Switch 4 and switch 5 are used to correct the inaccurate leveling of the elevator caused by the elongation or shortening of the wire rope due to the entry and exit of personnel after the elevator stops normally.

[0028] In a specific embodiment, the position interval includes positions 1 to 13. When any one of switch 1 and switch 2 is turned on (i.e., in the ON state), it indicates entering the real door area (door area plugboard). Switch 1 and switch 2 are both in the ON state in the interval between positions 1 and 13, and only when both are ON simultaneously is it one of the necessary conditions for the elevator to stop and open the door. Switch 3 confirms the real floor of the elevator. After entering position 1 (or position 13), error elimination and signal filtering are performed between positions 2 and 3 (or between positions 12 and 11) to ensure that the floor number is confirmed by the binary number between positions 4 and 5 (or between positions 10 and 9) through six holes (the six holes are encoded according to binary code. For the 4th floor, according to the binary standard encoding, the 3rd hole is opened, which is 0b00000100, and for the 5th floor, it is 0b00000101. The corresponding binary standard encoding can be consulted). Switches 4 and 5 are used to correct the inaccurate leveling of the elevator caused by the elongation or shortening of the wire rope when people enter and exit after the elevator stops normally. The data of the non-leveling of the elevator is confirmed through the pulse counting of phases A and B, and the elevator runs at an extremely low reverse speed to the leveling position when it moves left out of the interval between positions 7 and 6 or moves right out of the interval between positions 7 and 8. In this embodiment, switch 3 is an optoelectronic switch, and a signal acquisition sensor such as an infrared laser rangefinder or a barometric altitude rangefinder with real-time position signals can also be selected, and an auxiliary device is provided in the hoistway. Such as Figure 1 The magnetic isolation plate of the door area plugboard at the well position of the Nth floor. Six rectangular holes are opened between positions 4 and 5, and the rectangular holes are blocked when not installed; after installing the floors, binary encoding is performed according to the physical position of the elevator. For example, for the 1st floor, the 1st hole is opened, for the 2nd floor, the 2nd hole is opened, for the 3rd floor, the 1st hole and the 2nd hole are opened, and so on.

[0029] The state before the elevator starts is usually normal stop and abnormal stop. Such as Figure 2 As shown in the operation flow chart after the elevator stops normally, such as Figure 3 As shown in the operation flow chart after the elevator stops abnormally. This application mainly focuses on the method for detecting the absolute position of the elevator floor after the elevator is powered off abnormally due to a power outage. Other situations are not described here. The specific working principle is as follows: The state before the elevator starts is usually normal stop and abnormal stop. The reference process for normal stop is Figure 1 , and the reference process for abnormal stop is Figure 2 . This patent mainly studies the method for detecting the absolute position of the elevator floor after the elevator is powered off abnormally due to a power outage. Other situations are not described here.

[0030] As described above, if the position of the elevator cannot be accurately known, it may cause the elevator to run to the wrong floor or directly return to the terminal station in the industry, resulting in fear or a poor riding experience for customers, and even leading to on-site complaints. Therefore, this application provides a method for detecting the absolute position of the elevator floor during a power outage, and the specific steps are as follows:

[0031] Procedure 1: After the elevator power outage and power-on, first determine whether the elevator status meets the start conditions (such as whether the safety circuit is connected, whether there are any faults, etc.). If it cannot be started and run, directly report a fault and wait for the maintenance personnel to repair.

[0032] Procedure 2: If it is determined that the elevator can run, the elevator control system IC1 will judge whether the elevator can run normally at high speed based on the status before the power outage (i.e., the IC1 system data, obtained through self-learning and corrected during normal operation, stored in the EEPROM of the IC chip) and the status after the power outage (the IC2 system data read). If it can, it will be directly started. If not, it will directly switch to low-speed start-up operation.

[0033] The detection system will make a judgment. If the data of the elevator control system IC1 before the power outage and the data of the hoistway control system IC2 read after the power outage are basically the same, and after high-speed start-up, the data can be corrected and fine-tuned through calculation without affecting the operation curve and causing an emergency stop or failure, it is judged that the conditions for normal high-speed operation are met; if the data deviation between the elevator control system IC1 and the hoistway control system IC2 is large, and the system judges that an emergency stop or failure may occur after start-up, it will start at low speed and open the door to let people out after reaching the door area. At the same time, the true physical position of the floor is read through the binary code on the floor shading magnet plate, and the data of the elevator control system IC1 and the hoistway control system IC2 are compared and corrected.

[0034] Procedure 3: At this point, regardless of the high-speed start mode or the low-speed start mode, the system has entered the normal operation mode of the elevator, as Figure 3 shown.

[0035] Procedure 4: As Figure 2 shown, when the elevator enters the normal operation mode, there are two states when the elevator passes through the system door area interval of N floors: continuing to run or decelerating to enter the door area and stop the elevator. The absolute floor confirmation logic of the two states is the same. The real-time database of the elevator control system IC1 is compared with the hoistway control system IC2 in real time. First, it is confirmed whether the floor data N is correct. When the two data are inconsistent, the elevator control system IC1 corrects the floor data in the real-time database of the elevator control system IC1 to N according to the data of the hoistway control system IC2; after the correction is completed, it enters the next process; when the two data are consistent, it directly enters the next process.

[0036] Procedure 5: At the same time, the elevator control system IC1 calls the original hoistway library data to update the real-time hoistway data to ensure that the elevator can obtain the absolute position in real time, run safely, reliably and accurately to the destination floor, and level accurately.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A system for detecting the absolute position of elevator floors during power outages, characterized in that: Including elevator control system IC1, shaft absolute position controller, N-floor system door area, elevator car top control panel and main control panel, The shaft absolute position controller transmits the shaft position signal obtained by it to the car top control board and the main control board through the communication interface and the communication line. The shaft absolute position controller is a magnetoelectric detection device, including two magnetic switches, three photoelectric switches and a shaft control system IC2; The elevator control system IC1 is used to manage the functions and data of the elevator operation, including the main control logic chip of the elevator, and the hoistway control system IC2 includes a hoistway data collection chip. The elevator control system IC1 confirms the hoistway position after collecting the data through the hoistway control system IC2; The N-floor system door zone section includes an N-floor well position door zone plug-in plate and a position section, and the N-floor well position door zone plug-in plate corresponds to the position section.

2. A system for detecting the absolute position of elevator floors during power outages according to claim 1, characterized in that: The elevator control system IC1 includes two data management systems, a real-time data management system and a shaft original database management system.

3. The system for detecting the absolute position of a floor in a power outage elevator according to claim 1, characterized in that: The shaft control system IC2 is used to manage shaft absolute position related data, including door zone data and floor position data.

4. A system for detecting the absolute position of a floor in a power outage elevator according to claim 3, characterized in that: The two magnetic switches are denoted as switch 1 and switch 2, and the three photoelectric switches are denoted as switch 3, switch 4 and switch 5. If any one of switch 1 and switch 2 is turned on, it means entering the door zone plug plate; switch 1 and switch 2 are both in the ON state in the position range, that is, when they are turned on at the same time, it is one of the necessary conditions for the elevator to stop and open the door; switch 3 is used to confirm the actual floor of the elevator, and when entering the position range, error elimination and signal filtering confirmation are performed; switch 4 and switch 5 are used to correct the inaccurate elevator leveling caused by the elongation or shortening of the wire rope due to the entry and exit of people after the elevator stops normally.

5. A system for detecting the absolute position of a floor in a power outage elevator according to claim 1 or 4, characterized in that: The door zone plug-in plate is a multifunctional plug-in plate, which is the real door zone of the elevator. Only when the real door zone and the system door zone exist at the same time can the elevator door be opened and closed normally.

6. A detection method for a power-off elevator floor absolute position detection system as claimed in claim 1, characterized in that: The specific steps are as follows: S1. After the elevator is powered off, it is powered on. The elevator control system IC1 first determines whether the elevator status meets the starting conditions. If it cannot be started, it directly reports a fault and waits for maintenance personnel to repair it; S2. If it is determined that the elevator can run, the elevator control system IC1 will determine whether the elevator can run normally at high speed based on the system data before the power outage and the data of the well control system IC2 read after the power outage. If it can, it will start directly. If not, it will directly switch to low-speed start operation; S3. Regardless of high-speed start mode or low-speed start mode, the detection system has entered the normal operation mode of the elevator; S4. When the elevator enters the normal operation mode, when the elevator passes the door zone of the N floor system, there are two states: continue to run or slow down to enter the door zone and stop the elevator. The absolute floor confirmation logic of the two states is the same. The real-time database of the elevator control system IC1 is compared with the well control system IC2 in real time. First, the floor data N is confirmed to be correct. When the data of the two are inconsistent, the elevator control system IC1 corrects the floor data in the real-time database of the elevator control system IC1 to N according to the data of the well control system IC2; After the correction is completed, proceed to the next process; When the data of the two are consistent, go directly to the next process; S5. The elevator control system IC1 calls the original shaft library data to update the shaft real-time data to ensure that the elevator obtains the absolute position in real time.

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