CN114040882A - Control system for elevator - Google Patents
Control system for elevator Download PDFInfo
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- CN114040882A CN114040882A CN201980098050.9A CN201980098050A CN114040882A CN 114040882 A CN114040882 A CN 114040882A CN 201980098050 A CN201980098050 A CN 201980098050A CN 114040882 A CN114040882 A CN 114040882A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B3/00—Applications of devices for indicating or signalling operating conditions of elevators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B3/00—Applications of devices for indicating or signalling operating conditions of elevators
- B66B3/02—Position or depth indicators
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- Indicating And Signalling Devices For Elevators (AREA)
Abstract
Provided is an elevator control system which suppresses the reduction of car position detection accuracy caused by the transmission delay of a signal indicating whether a car is at a reference position. A state acquisition node (20) of a control system (5) transmits a communication packet including state information indicating whether or not a car (9) is located at a reference position acquired from a position detection unit and information of the time when the information is acquired. The control node (21) of the control system (5) synchronizes the time information with the state acquisition node (20). A control node (21) acquires information on the amount of rotation of the elevator sheave from the amount-of-rotation detection unit. The control node (21) acquires the rotation amount at the time when the state acquired when the communication packet is received from the state acquisition node (20) is switched, based on history data obtained by associating rotation amount information with information on the time when the information is acquired. The control node (21) calculates the position of the car (9) from the reference position and the amount of change in the amount of rotation from that time.
Description
Technical Field
The present invention relates to a control system for an elevator.
Background
Documents of the prior art
Patent document
Patent document 1: japanese patent No. 2595828
Disclosure of Invention
Problems to be solved by the invention
In the control device of patent document 1, a transmission delay between when the car is detected to be at the reference position and when the reference position signal is input to the control device is not taken into consideration. Therefore, when there is a transmission delay, the detection accuracy of the current position of the car may be lowered.
The present invention has been made to solve the above problems. The invention aims to provide a control system of an elevator, which can prevent the reduction of the detection precision of a car position caused by the transmission delay of a signal indicating whether the car is positioned at a reference position.
Means for solving the problems
The elevator control system of the present invention comprises: a state acquisition node that acquires state information from a position detection unit that detects a state in which whether or not an elevator car is located at a reference position in a hoistway, and transmits a communication packet including the acquired state information and information on a time at which the information was acquired; and a control node that synchronizes information of time with a state acquisition node, acquires rotation amount information from a rotation amount detection unit that detects a rotation amount of a sheave, calculates a movement amount of the car based on the change amount of the rotation amount, stores the information of the rotation amount and the information of the time at which the information is acquired in association with each other as history data, acquires information of the time at which the state is switched when a communication packet is received from the state acquisition node, acquires the rotation amount at the time based on the history data, and calculates a position of the car based on the change amount of the rotation amount from the time and a reference position, wherein a rope is wound around the sheave, and the rope moves in a hoistway when the car travels in the hoistway.
Effects of the invention
According to the present invention, a control system includes a state acquisition node and a control node. The position detection unit detects whether or not the elevator car is at a reference position in the hoistway. The state acquisition node acquires information on the state from the position detection unit. The state acquisition node transmits a communication packet including information of the acquired state and information of the time at which the information was acquired. The rotation amount detecting unit detects the rotation amount of the sheave. The rope wheel is wound with a rope. The ropes move in the hoistway as the car travels in the hoistway. The control node and the state acquisition node synchronize time information. The control node acquires information on the amount of rotation from the amount-of-rotation detection unit. The control node calculates the movement amount of the car from the amount of change in the amount of rotation. The control node stores information on the rotation amount and information on the time at which the information is acquired in association with each other as history data. The control node acquires information on the time when the state is switched when the communication packet is received from the state acquisition node. The control node acquires the amount of rotation at that time based on the history data. The control node calculates the position of the car based on the amount of change in the amount of rotation from that time and the reference position. This can suppress a decrease in the accuracy of detecting the position of the car due to a delay in the transmission of the signal indicating whether the car is at the reference position.
Drawings
Fig. 1 is a configuration diagram of an elevator including a control system according to embodiment 1.
Fig. 2 is a diagram showing an example of a communication packet in the control system of embodiment 1.
Fig. 3A is an activity diagram showing functions of the control system of embodiment 1.
Fig. 3B is an activity diagram showing the functions of the control system of embodiment 1.
Fig. 3C is an activity diagram showing the functions of the control system of embodiment 1.
Fig. 4 is a diagram showing a signal flow in the control system of embodiment 1.
Fig. 5 is a diagram showing a hardware configuration of a main part of the control system according to embodiment 1.
Fig. 6 is a configuration diagram of an elevator including the control system of embodiment 2.
Detailed Description
A mode for carrying out the present invention will be described with reference to the accompanying drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and overlapping description is simplified or omitted as appropriate.
Fig. 1 is a configuration diagram of an elevator including a control system according to embodiment 1.
The elevator 1 is installed in a building having a plurality of floors, for example. In an elevator 1, a building has a hoistway 2 that spans a plurality of floors. The elevator 1 includes a hoisting machine 3, a hoistway device 4, and a control system 5.
The hoisting machine 3 includes a motor 6 and a drive sheave 7. The motor 6 is a device that generates a driving force for rotating the driving sheave 7. The drive sheave 7 is a sheave rotated by a driving force generated by the motor 6. The hoisting machine 3 is installed in, for example, a machine room of the elevator 1. Alternatively, the hoisting machine 3 may be provided, for example, in the upper or lower portion of the hoistway 2.
The hoistway equipment 4 includes a main rope 8, a car 9, a counterweight 10, an upper reference position switch 11u, a lower reference position switch 11d, and a governor 12.
The main ropes 8 are wound around the drive sheave 7. The main ropes 8 are ropes conveyed by rotation of the drive sheave 7. The car 9 is provided on one side of the main ropes 8 with respect to the drive sheave 7 in the hoistway 2. A counterweight 10 is provided on the other side of the main rope 8 with respect to the drive sheave 7 in the hoistway 2. The car 9 is a device that travels in the vertical direction in the hoistway 2 following the main rope 8, and transports users and the like between a plurality of floors of a building. Here, the main ropes 8 are examples of ropes that move in the hoistway 2 when the car 9 travels in the hoistway 2. The counterweight 10 is a device that balances the load of the car 9 applied to the drive sheave 7 with the main ropes 8. The car 9 includes a switch cam (switch cam) 13. The switch cam 13 is provided on, for example, a side surface of the car 9.
The upper reference position switch 11u is provided on a wall surface of the hoistway 2 at a reference position. The reference position is a preset position in the hoistway 2. The upper reference position switch 11u is an example of the reference position switch 11. The lower reference position switch 11d is provided on a wall surface of the hoistway 2 at a reference position. The lower reference position switch 11d is provided at a reference position below the upper reference position switch 11 u. The lower reference position switch 11d is an example of the reference position switch 11. When the car 9 is located at the reference position where the reference position switch 11 is provided, the switching state of the reference position switch 11 is switched by the contact of the switch cam 13. Here, the switching state is, for example, the following state: either ON or OFF, or either 1 or 0. In this example, the switch state when the car 9 is at the reference position is an off state or a 0 state. The reference position switch 11 is an example of a position detection unit.
The speed governor 12 includes a speed governor rope 14, a speed governor sheave 15, and a speed governor encoder 16. Both ends of the governor rope 14 are connected to the car 9. The governor rope 14 is an example of a rope that moves when the car 9 travels in the hoistway 2. The governor sheave 15 is a sheave around which the governor rope 14 is wound. The governor encoder 16 is a device that detects the amount of rotation of the governor sheave 15. The governor encoder 16 is an example of a rotation amount detection unit. The speed limiter encoder 16 is, for example, a pulse encoder that outputs a pulse signal.
The control system 5 includes a motor drive unit 17 and an elevator control unit 18.
The motor drive unit 17 is a unit that controls the generation of drive force by the motor 6. In this example, the motor drive unit 17 controls the motor 6 by converting electric power input from the external power supply 19 and outputting the converted electric power to the motor 6.
The elevator control means 18 includes a state acquisition node 20 and a control node 21. The state acquisition node 20 is connected to the upper reference position switch 11u and the lower reference position switch 11d so as to be able to receive a reference position switch signal indicating information on the switching state. The control node 21 is connected to the governor encoder 16 so as to be able to receive a governor encoder signal indicating information on the detected amount of rotation. The control node 21 is connected to the motor drive unit 17 in such a way as to be able to output a control signal that controls the driving force generated by the motor 6. The state acquisition node 20 and the control node 21 are connected by a communication method such as serial communication. The state acquisition node 20 and the control node 21 mutually transmit data by, for example, a communication packet or the like. Here, the state acquisition node 20 and the control node 21 may be installed in separate places in a building in which the elevator 1 is installed. The control node 21 may be provided in the control panel of the elevator 1, for example. The control panel of the elevator 1 is installed in, for example, a machine room of the elevator 1 or an upper or lower part of the hoistway 2. The state acquisition node 20 may be installed in a communication station or the like provided at a location remote from the control panel, for example, for the purpose of saving wiring.
Next, an example of communication between the state acquisition node 20 and the control node 21 will be described with reference to fig. 2.
Fig. 2 is a diagram showing an example of a communication packet in the control system of embodiment 1.
In fig. 2, the uplink communication packet 22 is a communication packet transmitted from the state acquisition node 20 to the control node 21. The downlink communication packet 23 is a communication packet transmitted from the control node 21 to the status acquisition node 20.
The communication packet contains a communication header 24, communication data 25, and error correction coded data 26. The communication header 24 contains information on the communication packet itself such as a transmission source and a destination. The communication data 25 includes the main content of data communicated by communication packets. The error correction coded data 26 is data for detecting and correcting an error caused by a communication error or the like.
The communication data 25 of the upstream communication packet 22 contains the reference position switch detection timer latch value and the reference position switch state information. The reference position switch state information is information of the switch state acquired by the state acquisition node 20 from the reference position switch 11. The reference position switch detection timer latch value is information of the timing at which the state acquisition node 20 acquires the switch state.
The communication header 24 of the downstream communication packet 23 contains a communication timing counter. Here, the communication timer counter is a counter that counts every elapse of a predetermined time. In this example, the time of the control node 21 and the state acquisition node 20 is determined by the communication timer counter. The communication timing counter included in the downlink communication packet 23 is the value of the communication timing counter of the control node 21. The communication timer counter included in the downlink communication packet 23 is used for time synchronization at the status acquisition node 20.
Next, the function of the control system 5 will be described with reference to fig. 3A to 3C.
Fig. 3A to 3C are activity diagrams showing functions of the control system according to embodiment 1.
An example of processing in the elevator control unit 18 is shown in fig. 3A.
The control flow of the processing in the elevator control unit 18 branches after the activation of N01 (N02). On the side of the control flow after branching off, the state acquisition node 20 executes the state acquisition node process N03. On the other side of the branched control flow, the control node 21 executes control node processing N04. The respective control flows of the plurality of control flows after the divergence may also be executed asynchronously.
In the state acquisition node process N03, the state acquisition node 20 receives an input of the downlink communication packet 23 from the control node 21. In the state acquisition node process N03, the state acquisition node 20 receives an input of the reference position switch signal N05 from the reference position switch 11. In the state acquisition node process N03, the state acquisition node 20 outputs the upstream communication packet 22 to the control node 21 as an input of the control node process N04.
In the control node process N04, the control node 21 receives an input of the governor encoder signal N06 from the governor encoder 16. In the control node process N04, the control node 21 receives the input of the uplink communication packet 22 from the state acquisition node 20. In the control node process N04, the control node 21 outputs the downlink communication packet 23 to the state acquisition node 20 as an input of the state acquisition node process N03.
Fig. 3B shows an example of the state acquiring node process N03 of the state acquiring node 20.
In the state obtaining node process N03, the state obtaining node 20 executes an I/O process N08 (I/O: input/output) as a periodic process of the control period N07. In the I/O process N08, the state acquisition node 20 receives an input of a reference position switch signal N05 from the reference position switch 11. The state acquisition node 20 updates the stored information of the reference position switch state N09 in accordance with the reference position switch signal N05. The state acquisition node 20 detects switching of the switching state by comparing the stored information of the reference position switching state N09 with the switching state information acquired from the reference position switching signal N05, for example.
The control flow of the state retrieval node process N03 diverges after N10 is started (N11). On the control flow side after the branching, the state acquisition node 20 waits for detection of switching of the switch state of the reference position switch 11 (N13). On the other side of the control flow after the branching, the state acquisition node 20 waits for the reception of the downstream communication packet 23 transmitted from the control node 21 as the reception packet N16 (N15). The respective control flows of the plurality of control flows after the divergence may also be executed asynchronously.
When the switching of the switching signal is detected at N13, the state acquisition node 20 executes the reference position switch detection timer latch process N17. In the reference position switch detection timer latch process N17, the state acquisition node 20 latches the value of the communication timer counter N18 at the time when the switching of the switch signal is detected as the reference position switch detection timer latch value N19.
When receiving the reception packet N16 at N15, the state acquisition node 20 performs time synchronization processing N20. In the time synchronization process N20, the state acquisition node 20 acquires the value of the communication timing counter of the control node 21 included in the received packet N16. The status acquiring node 20 updates the value of the communication timing counter N18 of the status acquiring node 20 by using the acquired value of the communication timing counter of the control node 21. After that, the state retrieval node 20 executes the packet creation process N21.
In the packet creation process N21, the state acquisition node 20 acquires information of the reference position switch detection timer latch value N19 and information of the reference position switch state N09. The state acquisition node 20 creates the upstream communication packet 22 containing the acquired information as a transmission packet N22. Thereafter, at N23, the state acquisition node 20 transmits the transmission packet N22 to the control node 21.
Fig. 3C shows an example of the control node process N04 of the control node 21.
In the control node process N04, the control node 21 performs the packet creation process N25 as a periodic process of the communication cycle N24. In the packet creation process N25, the control node 21 acquires the value of the communication timing counter N26. The control node 21 creates the downstream communication packet 23 containing the acquired information as a transmission data packet N27. Thereafter, at N28, the control node 21 transmits the created transmission packet N27 to the state acquisition node 20.
In the control node process N04, the control node 21 waits for the reception of the upstream communication packet 22 transmitted from the status acquisition node 20 as the received packet N32 after the start of N29 (N31).
Upon receiving the reception packet N32 at N31, the control node 21 performs the reference position switch detection process N33. In the reference position switch detection process N33, the control node 21 acquires the switch state information included in the reception packet N32. The control node 21 updates the stored information of the reference position switch detection state N34 based on the acquired information. Here, the information of the reference position switch detection state N34 includes, for example, information of the switching of the non-switching state and the timing at which the switching is detected. This timing is determined based on, for example, a reference position switch detection timer latch value latched at the state acquisition node 20. Thereafter, the control node handles the control flow divergence of N04 (N35). On the side of the branched control flow, the control node 21 waits again for the reception of the upstream communication packet 22 transmitted from the state acquiring node 20 as the reception packet N32 (N31). The other side of the bifurcated control flow joins another control flow (N36).
In the control node process N04, the control node 21 performs a pulse count process N38 as a periodic process of the control period N37. In the pulse count process N38, the control node 21 receives an input of the governor encoder signal N06 from the governor encoder 16. The control node 21 updates the stored pulse counter value N39 in accordance with the rate limiter encoder signal N06.
After that, the control node 21 performs the pulse counter value buffering process N40. In the pulse counter value buffering process N40, the control node 21 updates the pulse counter value history buffer N41 according to the stored pulse counter value N39. The pulse counter value history buffer N41 is an example of history data stored by associating information of the pulse counter value N39 with the time at which the information is acquired. The control flow after the pulse counter value buffering process N40 joins another control flow (N36).
The control flow added at N36 branches at N42 depending on whether or not the on-off state is switched. When the switching of the switch state is not detected, the control node 21 executes the car movement amount calculation process N43. On the other hand, when the switching of the switch state is detected, the control node 21 executes the car position presetting process N44.
In the car movement amount calculation process N43, the control node 21 calculates the car movement amount N45 from the change amount of the pulse counter value N39. Here, the pulse counter value N39 corresponds to the amount of rotation of the sheave around which the rope is wound, and the rope moves when the car 9 travels in the hoistway 2. Therefore, when the slip between the rope and the sheave can be ignored, the car movement amount N45 is proportional to the amount of change in the pulse counter value N39. The control node 21 calculates the car movement amount N45 by, for example, multiplying the amount of change in the pulse counter value N39 by a coefficient. After that, the control node 21 executes the car current position update process N47. In the car current position updating process N47, the control node 21 updates the car current position N48 by adding the calculated car movement amount N45 to the immediately preceding car current position N48.
In the car position presetting process N44, the control node 21 acquires the timing of detecting the switching of the switch state from the reference position switch detection state N34. Here, the acquired time is a past time due to a transmission delay or the like between the state acquisition node 20 and the control node 21. The control node 21 acquires the acquired pulse counter value at the past time from the pulse counter value history buffer N41.
The control node 21 calculates the amount of movement of the car 9 from the detection of the switching of the switch state to the present time based on the acquired pulse counter value at the past time and the present pulse counter value N39. The control node 21 specifies the reference position switch 11 that detects switching of the switch state, based on the reference position switch detection state N34. The control node 21 acquires information on the reference position where the specified reference position switch 11 is provided, based on the reference position switch learning value N49. Here, the reference position switch learning value N49 may be, for example, information of a reference position recorded in advance in the system by the learning operation or information of a reference position obtained from a parameter such as a design value. The control node 21 calculates a car position preset value N50 from the acquired information of the reference position. After that, the control node 21 executes the car current position update process N47. In the car current position updating process N47, the control node 21 updates the car current position N48 by adding the car position preset value N50 to the calculated movement amount of the car 9.
Next, an operation example of the control system 5 will be described with reference to fig. 4.
Fig. 4 is a diagram showing a signal flow in the control system of embodiment 1.
At time tNThe control node 21 takes the current position of the car 9 as PNAnd storing. Control node 21 according to formula PN＝PN-1+K*(XN-XN-1) And calculate the time tNCurrent position P of lower car 9N. Here, P isN-1Represents the time tN-1The current position of the lower car 9. K represents a preset coefficient. XNRepresents the time tNThe pulse counter value of the lower governor encoder 16. XN-1Represents the time tN-1The pulse counter value of the lower governor encoder 16.
At time tNThe state acquisition node 20 creates a content p including the switch state and the time stamp1And upstream communication packets 22. Here, the time stamp of the status acquisition node 20 is synchronized with the time stamp of the control node 21 by the downstream communication packet 23 received from the control node 21. At time tNThe switching of the switch state is not detected. At time tNThe state acquisition node 20 transmits the created upstream communication packet 22 to the control node 21.
The control node 21 is at time t due to transmission delay or the likeNIs then received at time tNThe uplink communication packet 22 transmitted from the state acquisition node 20.
At time tN+1The control node 21 changes the current position of the car 9 from PNIs updated to PN+1. At time tN+1The control node 21 receives the communication packet at time tNContent p transmitted from the status acquisition node 201The communication packet of (1). Content p1Does not contain switching information of the switch state. Therefore, the control node 21 calculates the current position of the car 9 by the car movement amount calculation process and the car current position update process. At this time, the control node 21 follows the formula PN+1＝PN+K*(XN+1-XN) And calculate the time tN+1Current position P of lower car 9N+1. Here, XN+1Represents the time tN+1The pulse counter value of the lower governor encoder 16.
At time tN+1The state acquisition node 20 creates a content p including the switch state and the time stamp2And upstream communication packets 22. At time tN+1The switching of the switch state is detected. The reference position switch detection timer latch value is equal to time tN+1The corresponding value. At time tN+1The state acquisition node 20 transmits the created upstream communication packet 22 to the control node 21.
The control node 21 is at time t due to transmission delay or the likeN+1Then receivesTo the moment tN+1The uplink communication packet 22 transmitted from the state acquisition node 20.
At time tN+2The control node 21 changes the current position of the car 9 from PN+1Is updated to PN+2. At time tN+2The control node 21 receives the communication packet at time tN+1Content p transmitted from the status acquisition node 202The communication packet of (1). Content p2Contains switching information of the switch state. Therefore, the control node 21 calculates the current position of the car 9 through the car position presetting process and the car current position updating process. At this time, the control node 21 follows the formula PN+2＝Lu+K*(XN+2-XN+1) And calculate the time tN+2Current position P of lower car 9N+2. Here, XN+2Represents the time tN+2The pulse counter value of the lower governor encoder 16. L isuA preset value indicative of the car position. In this example, LuIs a value l learned from the reference position switchuThe position of the corresponding car 9. XN+1Indicating the past time t at which the switching of the switch state is detectedN+1The pulse counter value of the lower governor encoder 16.
As described above, the control system 5 according to embodiment 1 includes the state acquisition node 20 and the control node 21. The position detection unit detects whether or not the car 9 of the elevator 1 is at a reference position in the hoistway 2. The state acquisition node 20 acquires information on the state from the position detection unit. The state acquisition node 20 transmits a communication packet including information of the acquired state and information of the time at which the information was acquired. The rotation amount detecting unit detects the rotation amount of the sheave. The rope wheel is wound with a rope. When the car 9 travels in the hoistway 2, the rope moves in the hoistway 2. The control node 21 and the state acquisition node 20 synchronize time information. The control node 21 acquires information on the rotation amount from the rotation amount detection unit. The control node 21 calculates the movement amount of the car 9 from the amount of change in the rotation amount. The control node 21 stores the information of the rotation amount and the information of the time at which the information is acquired in association with each other as history data. The control node 21 acquires information of the time when the state is switched when receiving the communication packet from the state acquisition node 20. The control node 21 acquires the amount of rotation at that time based on the history data. The control node 21 calculates the position of the car 9 based on the amount of change in the amount of rotation from that time and the reference position.
The state acquisition node 20 acquires information on the switching state of the reference position switch 11 provided at the reference position as state information of the position detection unit.
When the slip between the rope and the sheave can be ignored, the amount of movement of the car 9 is proportional to the amount of change in the amount of rotation of the sheave. Here, the rope and sheave are, for example, a governor rope 14 and a governor sheave 15 that move along with movement of the car 9. Alternatively, the ropes and sheaves are, for example, the main ropes 8 and the drive sheave 7 that move the car 9. On the other hand, errors due to slippage between the rope and the sheave accumulate. Therefore, in order to prevent the accumulated error from increasing, it is necessary to correct the position of the car 9 when the car 9 is located at the reference position. A signal indicating that the car 9 is at the reference position is output from, for example, the reference position switch 11. Here, signals output from the reference position switch 11 and the like may be collected in a communication station provided at a position distant from the control panel for the purpose of saving wiring and the like. At this time, the signal indicating that the car 9 is located at the reference position may be communicated from the communication station to the control node 21 with a transmission delay. In this case, the control node 21 also calculates the position of the car 9 by acquiring past data in consideration of the time difference due to the transmission delay based on the history data. This can suppress a decrease in the accuracy of detecting the position of the car 9 due to a delay in the transmission of the signal indicating whether or not the car 9 is at the reference position.
The control node 21 may sample the history data asynchronously with the sampling interval at which the state acquisition node 20 acquires the state information from the position detection unit. When receiving the communication packet from the state acquisition node 20, the control node 21 acquires the rotation amount at the time by interpolating the rotation amount information before and after the time when the state is switched according to the history data.
The sampling interval at which the state acquisition node 20 acquires the state information from the position detection unit is, for example, a control cycle N07 in fig. 3B. The sampling interval at which the control node 21 stores the history data is, for example, the control period N37 of fig. 3C. When these sampling intervals are asynchronous, the pulse counter value corresponding to the time at which switching of the switch state is detected may not be stored in the pulse counter value history buffer. At this time, for example, the control node 21 obtains the pulse counter value at the time by interpolation based on information stored in the pulse counter value history buffer as information before and after the time when switching of the switch state is detected. The control node 21 obtains the pulse counter value by an interpolation method such as linear interpolation. In this case, the control node 21 can set the sampling interval of the history data to be long. This saves the buffer size of the pulse counter value history buffer.
The rotation amount detection unit may be provided on a sheave such as a return sheave around which the main rope 8 is wound or a tension sheave around which the speed governor rope 14 is wound.
Further, the reference position switch 11 may be provided in 3 or more. The number of the reference position switches 11 may be only 1.
Next, an example of the hardware configuration of the control system 5 will be described with reference to fig. 5.
Fig. 5 is a diagram showing a hardware configuration of a main part of the control system 5 according to embodiment 1.
The various functions of the control system 5 may be implemented by processing circuitry. The processing circuit is provided with at least 1 processor 5b and at least 1 memory 5 c. The processing circuit may be provided with a processor 5b and a memory 5c, or may be provided with at least one dedicated hardware 5a instead of these.
In the case where the processing circuit includes the processor 5b and the memory 5c, each function of the control system 5 is realized by software, firmware, or a combination of software and firmware. At least one of the software and the firmware is described as a program. The program is stored in the memory 5 c. The processor 5b reads out and executes the program stored in the memory 5c, thereby realizing each function of the control system 5.
The processor 5b is also called a CPU (central processing unit), a processing device, an arithmetic device, a microprocessor, a microcomputer, or a DSP. The Memory 5c is composed of, for example, a nonvolatile or volatile semiconductor Memory such as a RAM (Random Access Memory), a ROM (Read Only Memory), a flash Memory, an EPROM (Erasable Programmable Read Only Memory), an EEPROM (Electrically Erasable Programmable Read Only Memory), a magnetic Disk, a flexible Disk, an optical Disk, a CD (compact Disk), a mini Disk (mini Disk), a DVD (Digital Versatile Disk), and the like.
In the case where the processing Circuit includes dedicated hardware 5a, the processing Circuit is realized by, for example, a single Circuit, a composite Circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination thereof.
The respective functions of the control system 5 can be realized by processing circuits, respectively. Alternatively, the functions of the control system 5 may be realized collectively by the processing circuit. The functions of the control system 5 may be partially implemented by dedicated hardware 5a, and the other parts may be implemented by software or firmware. In this way, the processing circuitry implements the functions of the control system 5 by hardware 5a, software, firmware, or a combination thereof.
In embodiment 2, points different from the example disclosed in embodiment 1 will be described in detail. As for the features not described in embodiment 2, any of the features in the example disclosed in embodiment 1 may be adopted.
Fig. 6 is a configuration diagram of an elevator including the control system of embodiment 2.
The elevator 1 includes a plurality of door zone plates 27. Each of the plurality of door area plates 27 is, for example, a metal plate. Each of the plurality of door area panels 27 is provided in the hoistway 2 corresponding to a stop position on each of the plurality of floors.
The car 9 is provided with a door zone sensor 28. The door area sensor 28 is a sensor that detects the door area plate 27 provided at each of a plurality of floors when the car 9 is located at a stop position of the floor. The door area sensor 28 detects the door area plate 27 by, for example, an electromagnetic effect, an optical effect, or a mechanical contact. In this example, the reference position is a stop position of each of the plurality of floors.
In the control system 5 according to embodiment 2, the state acquisition node 20 acquires information on the detection state of the door area sensor 28 as state information of the position detection unit. That is, the upstream communication packet 22 includes information of the detection state of the door area sensor 28. The control node 21 obtains the amount of sheave rotation at the time when the detection state of the door area sensor 28 is switched, based on the history data. The control node 21 calculates the position of the car 9 based on the amount of change in the amount of rotation from that time and the reference position.
As the state information of the position detecting section, the state acquiring node 20 may acquire the detection state information of the door area sensor 28 instead of the switch state information of the reference position switch 11. Alternatively, the state acquisition node 20 may acquire the detection state information of the reference position switch 11 together with the switch state information of the reference position switch 11 as the state information of the position detection unit.
Industrial applicability
The control system of the present invention can be applied to an elevator.
Description of the reference symbols
1: an elevator; 2: a hoistway; 3: a traction machine; 4: hoistway equipment; 5: a control system; 6: a motor; 7: a drive sheave; 8: a main rope; 9: a car; 10: a counterweight; 11: a reference position switch; 11 u: an upper reference position switch; 11 d: a lower reference position switch; 12: a speed limiter; 13: a switch cam; 14: a governor rope; 15: a governor sheave; 16: a speed limiter encoder; 17: a motor drive unit; 18: an elevator control unit; 19: a power source; 20: a state acquisition node; 21: a control node; 22: an uplink communication packet; 23: a downlink communication packet; 24: a communication header; 25: communicating data; 26: error correction coded data; 27: a door zone panel; 28: a door zone sensor; 5 a: hardware; 5 b: a processor; 5 c: a memory.
Claims (4)
1. A control system for an elevator, comprising:
a state acquisition node that acquires information on a state of an elevator car at a reference position in a hoistway from a position detection unit that detects the state, and transmits a communication packet including the acquired information on the state and information on a time at which the information is acquired; and
and a control node that synchronizes information of a time point with the state acquisition node, acquires information of a rotation amount from a rotation amount detection unit that detects a rotation amount of a sheave around which a rope is wound, calculates a movement amount of the car based on the change amount of the rotation amount, stores the information of the rotation amount and the information of the time point at which the information is acquired in association with each other as history data, acquires information of a time point at which the state is switched when the communication packet is received from the state acquisition node, acquires the rotation amount at the time point based on the history data, and calculates a position of the car based on the change amount of the rotation amount from the time point and the reference position, wherein the rope moves in the hoistway when the car travels in the hoistway.
2. The control system of an elevator according to claim 1,
the control node samples the history data asynchronously with respect to a sampling interval at which the state acquisition node acquires the state information from the position detection unit, and acquires the rotation amount at a time point when the state acquisition node receives the communication packet from the state acquisition node, based on the history data, by interpolation from information of the rotation amount before and after the time point at which the state is switched.
3. The control system of an elevator according to claim 1 or 2,
the state acquisition node acquires information on a switching state of a reference position switch provided at the reference position as information on a state of the position detection unit.
4. The control system of an elevator according to claim 1 or 2,
the state acquisition node acquires information on a detection state of a door area sensor provided in the car, which detects a door area plate provided in the reference position, as information on a state of the position detection unit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2019/026864 WO2021005658A1 (en) | 2019-07-05 | 2019-07-05 | Elevator control system |
Publications (2)
| Publication Number | Publication Date |
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| CN114040882A true CN114040882A (en) | 2022-02-11 |
| CN114040882B CN114040882B (en) | 2023-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201980098050.9A Active CN114040882B (en) | 2019-07-05 | 2019-07-05 | Control system for elevator |
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| Country | Link |
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| JP (1) | JP6958767B2 (en) |
| CN (1) | CN114040882B (en) |
| WO (1) | WO2021005658A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023135648A1 (en) * | 2022-01-11 | 2023-07-20 | 三菱電機株式会社 | Position computation device and elevator system |
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- 2019-07-05 WO PCT/JP2019/026864 patent/WO2021005658A1/en active Application Filing
- 2019-07-05 JP JP2021526395A patent/JP6958767B2/en active Active
- 2019-07-05 CN CN201980098050.9A patent/CN114040882B/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| JP6958767B2 (en) | 2021-11-02 |
| JPWO2021005658A1 (en) | 2021-09-27 |
| CN114040882B (en) | 2023-06-27 |
| WO2021005658A1 (en) | 2021-01-14 |
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