CN110316628B - Elevator safety system - Google Patents
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- CN110316628B CN110316628B CN201810263227.3A CN201810263227A CN110316628B CN 110316628 B CN110316628 B CN 110316628B CN 201810263227 A CN201810263227 A CN 201810263227A CN 110316628 B CN110316628 B CN 110316628B
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- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
- B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
- B66B5/06—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed electrical
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- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses an elevator safety system.A evaluation unit is connected with a car absolute position sensor through a first serial bus, is connected with a car safety node through a second serial bus, and is directly connected with a shaft safety device through a wire harness; the car absolute position sensor sends the real-time position and speed value of the car to the evaluation unit; the car safety node is connected with the car safety device through a wire harness, receives the state information of the car safety device and transmits the state information to the evaluation unit; and the evaluation unit outputs a speed safety signal according to the car speed value, outputs an accidental deceleration signal according to the car speed value and the real-time car position, and outputs an accidental car movement signal under the condition of opening the door according to the car safety device state information, the well safety device state information, the car speed value and the real-time car position. The elevator safety system can accurately and quickly acquire the position and the speed of the car and can obtain an accurate evaluation result.
Description
Technical Field
The invention relates to an elevator control technology, in particular to an elevator safety system established on a bus basis.
Background
Patent document CN 103079981B proposes an elevator safety system in which a bus in which a controller is connected to a hoistway safety node is referred to as a first bus, and a bus in which a controller is connected to a car safety node is referred to as a second bus. The car safety node is used for receiving the information of the sensors or safety devices of all the car parts, transmitting the information to the controller through the second bus, and executing corresponding safety and non-safety functions by closing or opening a power breaker inside the controller.
In chinese patent 00804551.8, a safety system for elevator is proposed, in which a controller is connected to a hoistway safety node and a car safety node by an electronic safety bus, and when the controller determines that the elevator needs to enter a safety state, it informs an elevator driving and braking device to perform elevator braking.
The above two patents utilize the safety bus to transmit the signals of the safety devices in the elevator car and the shaft to the controller, and the controller performs logic judgment. Because the absolute position or the speed of the car is acquired by the car absolute position sensor and is transmitted in a safety bus mode, the absolute position or the speed of the car needs to be transmitted to a nearby safety node firstly by adopting the two patents, and then the information is transmitted to the controller through another safety bus. Therefore, the controller can receive the absolute position or speed information of the car only through two safety buses, the communication delay and the time required by the safety node to process the information lead the absolute position or speed information of the car to be delayed, and the execution of the safety function is influenced in serious cases.
In a common elevator safety system, a control cabinet is connected with a velometer installed on a tractor through a cable to acquire the rotating speed of the tractor and further calculate the actual speed of an elevator car, but because the tractor is connected with the elevator car through a steel wire rope, the steel wire rope cannot be prevented from stretching and shaking and the relative slippage between the steel wire rope and a wheel groove of the tractor, and a certain deviation exists in the acquisition of the position and the speed of the car.
Some common elevator safety systems are that an evaluation unit simply uses a wire harness and switch contact combined logic to judge whether a speed value of a car is safe or not, judge whether the car moves accidentally under the condition of opening a door or not, judge whether the car decelerates abnormally or not, judge the reliability of the evaluation unit and have complex circuits. Because the landing door state and the door zone position cannot be accurately obtained, the accidental movement protection of the lift car cannot be accurately realized; meanwhile, due to the complex logic, the risk of false triggering is high, and according to the standard regulation, after the fault is started, a professional is required to reset, so that the reliability of the elevator and the riding experience of passengers are influenced;
the common elevator safety systems comprise a first safety serial bus for transmitting the position and speed information of the elevator car to an elevator car node, a second safety serial bus for transmitting the position and speed information of the elevator car to an evaluation unit, and an evaluation unit for evaluating the safety function by combining the states of the elevator car safety devices uploaded at the same time. Firstly, because the position and speed information of the car passes through the first safety serial bus and has already passed through a certain time delay, the information is not the information of the same time point with the information of the safety device of the car when the information reaches the car node, and at the moment, the obtained result is not accurate enough no matter the information is sent to an evaluation unit or the car node for judgment or evaluation; and secondly, the second safety serial bus is provided with more nodes, the amount of information to be transmitted is more, so the set transmission rate is slower than that of the first safety serial bus, the position and speed information of the elevator car reaching the evaluation node is more delayed after two times of time delay, particularly when the elevator speed is higher or the lifting height is higher, the time delay causes more serious information delay, and the evaluation result has larger difference compared with the real situation.
Disclosure of Invention
The invention aims to provide an elevator safety system, which can accurately acquire the position and the speed of a car, can quickly acquire the real-time position and the speed of the car in low time delay, can acquire an accurate evaluation result, accurately realize an uplink overspeed protection function, a normal deceleration monitoring protection safety function and an execution car accidental movement protection safety function, and has the advantages of simple circuit, low false triggering risk, high elevator reliability and good passenger riding experience.
In order to solve the technical problem, the elevator safety system provided by the invention comprises an evaluation unit, a car absolute position sensor, a car safety node, a control cabinet, a hoistway safety device, a first serial bus and a second serial bus;
the evaluation unit is connected with the car absolute position sensor through a first serial bus, connected with the car safety node through a second serial bus and directly connected with a shaft safety device through a wiring harness;
the car absolute position sensor sends the real-time position and speed value of the car to the evaluation unit;
the car safety node is connected with a car safety device through a wire harness, receives state information of the car safety device and transmits the state information to the evaluation unit, and the state information of the car safety device reflects the state of a car door;
the state information of the hoistway safety device is transmitted to an evaluation unit, and the state information of the hoistway safety device reflects the state of a landing door;
the evaluation unit outputs a speed safety signal to the control cabinet according to whether the speed value of the lift car exceeds a set speed; outputting a signal whether the elevator is accidentally decelerated to the control cabinet according to the speed value of the elevator car, the real-time position of the elevator car and a preset normal deceleration protection curve of the elevator; and outputting a signal indicating whether the car accidentally moves to the control cabinet under the condition of opening the door according to the state information of the car safety device, the state information of the hoistway safety device, the speed value of the car, the real-time position of the car and preset parameters of the elevator hoistway.
Preferably, the evaluation unit is connected to the control cabinet through a third serial bus.
Preferably, the evaluation unit differentiates the car real-time position value to obtain the car real-time speed value if the car absolute position sensor does not send the speed value.
Preferably, the set speed is set according to an elevator rated speed value and an additional margin.
Preferably, the elevator shaft parameters include an elevator shaft height, a height of each floor, a door opening range and a re-leveling range.
Preferably, the car safety device comprises a car door locking switch and a car door in-place contact.
Preferably, the car safety device further comprises an escape door, a car top emergency stop switch, a safety window or safety tongs;
the state information of the car safety device also reflects the states of an escape door, a car top emergency stop switch, a safety window or a safety gear.
Preferably, the hoistway safety device comprises a landing door locking switch and a landing door in-place contact.
Preferably, the hoistway safety device further comprises a safety door;
the hoistway safety device state information also reflects the state of the safety door.
Preferably, the data transmission rate of the first secure serial bus is the same as that of the second secure serial bus.
Preferably, the first secure serial bus has a higher data transfer rate than the second secure serial bus.
Preferably, the control cabinet sends elevator shaft information to the evaluation unit;
and the evaluation unit compares the elevator shaft information with the preset elevator shaft parameters in the evaluation unit to judge the reliability of the evaluation unit.
Preferably, the control cabinet sends the elevator state to the evaluation unit, so that the evaluation unit judges the operation safety of the elevator and controls the elevator to start or stop correspondingly.
Preferably, the elevator safety system further comprises a pit safety node;
the pit safety node is connected to the evaluation unit through a serial bus;
the pit safety node is connected with the pit safety device through a wire harness and receives state information of the pit safety device;
the pit safety node transmits the received pit safety device status information to the evaluation unit.
Preferably, the pit safety node is connected to the evaluation unit through a second serial bus.
Preferably, the pit safety node and the car safety node share the same second serial bus to be connected to the evaluation unit.
Preferably, the pit safety node and the car safety node are connected to the evaluation unit using separate second serial buses, respectively.
Preferably, the pit safety node further comprises a pit maintenance exit device connected through a wire harness, receives state information of the pit maintenance exit device, and transmits the state information to the evaluation unit.
Preferably, the evaluation unit determines whether to exit the pit overhaul state according to the pit overhaul exit device state information.
Preferably, the evaluation unit sends an instruction to the pit security node to control the pit security node to start, stop, restart or self-check.
Preferably, the evaluation unit sends a command to the car absolute position sensor to control the car absolute position sensor to start, stop, restart or self-check.
Preferably, the evaluation unit sends a command to the car safety node to control the car safety node to start, stop, restart or self-check.
Preferably, the evaluation unit is connected with the machine room safety device through a wire harness, and receives state information of the machine room safety device.
Preferably, the control cabinet is further connected with a car absolute position sensor through a first serial bus;
the car absolute position sensor transmits the state information of the car absolute position sensor and the real-time position and speed value of the car to the control cabinet;
and the control cabinet judges whether the absolute position sensor of the lift car is reliable or not according to the self state information of the position sensor of the lift car, the real-time position and speed value of the lift car and the information fed back by a velometer arranged on the traction machine.
According to the elevator safety system, the evaluation unit 1 directly obtains the real-time position and the speed value of the elevator car through the elevator car absolute position sensor 4 through the first serial bus 5, the elevator safety system is not influenced by stretching and shaking of the steel wire rope and relative sliding of the steel wire rope and a traction machine wheel groove, and the position and the speed of the elevator car can be accurately obtained; the evaluation unit 1 directly obtains the real-time position and the speed value of the car and the state information of the safety device of the car through a serial bus, can quickly obtain the real-time position and the speed value of the car in low time delay, can obtain an accurate evaluation result, and realizes an uplink overspeed protection function, a normal deceleration monitoring protection safety function and an execution car accidental movement protection safety function; the real-time position and speed value of the car and the state information of the car safety device are respectively transmitted to the evaluation unit 1 through the first serial bus 5 and the second serial bus 6, the state information of the car safety device does not influence the transmission of the real-time position and speed value of the car to the evaluation unit 1, and the evaluation unit 1 can obtain the real-time position and speed value of the car quickly and slowly and can obtain an accurate evaluation result; the evaluation unit 1 obtains the real-time position and speed value of the car and the state information of the safety device of the car through the first serial bus 5 and the second serial bus 6, and the circuit is simple; the evaluation unit 1 accurately obtains the landing door state of each door zone position through the wire harness, can accurately realize the protection of accidental movement of the car, and meanwhile, the evaluation unit is simple in control logic, low in false triggering risk, high in elevator reliability and good in passenger riding experience.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the present invention are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of a first construction of an elevator safety system of the present invention;
fig. 2 is a schematic view of a second construction of the elevator safety system of the present invention;
fig. 3 is a schematic view of a third construction of the elevator safety system of the present invention;
fig. 4 is a schematic diagram of a fourth configuration of an elevator safety system of the present invention.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1, 2, 3 and 4, the elevator safety system comprises an evaluation unit 1, a car absolute position sensor 4, a car safety node 2, a control cabinet 7, a hoistway safety device 15, a first serial bus 5, a second serial bus 6;
the evaluation unit 1 is connected with the car absolute position sensor 4 through a first serial bus 5, connected with the car safety node 2 through a second serial bus 6 and directly connected with a shaft safety device 15 through a wire harness;
the car absolute position sensor 4 sends the real-time position and speed value of the car to the evaluation unit 1;
the car safety node 2 is connected with the car safety device 12 through a wire harness, receives the state information of the car safety device 12 and transmits the state information to the evaluation unit 1, and the state information of the car safety device reflects the state of a car door;
the state information of the hoistway safety device 15 is transmitted to the evaluation unit 1, and the state information of the hoistway safety device reflects the state of a landing door;
the evaluation unit 1 outputs a speed safety signal to the control cabinet 7 according to whether the speed value of the car exceeds a set speed; outputting a signal whether the elevator is accidentally decelerated to the control cabinet 7 according to the speed value of the elevator car, the real-time position of the elevator car and a preset normal deceleration protection curve of the elevator; and outputting a signal indicating whether the car accidentally moves to the control cabinet 7 under the condition of opening the door according to the state information of the car safety device, the state information of the hoistway safety device, the speed value of the car, the real-time position of the car and preset elevator hoistway parameters, and closing or opening safety relay contacts in the evaluation unit 1.
Preferably, the evaluation unit 1 is connected to the control cabinet 7 via a third serial bus 8.
Preferably, the evaluation unit differentiates the car real-time position value to obtain the car real-time speed value if the car absolute position sensor does not send the speed value.
Preferably, the set speed is set according to an elevator rated speed value and an additional margin.
Preferably, the elevator shaft parameters include the height of the elevator shaft, the height of each floor, the door opening range, the re-leveling range and the like.
Preferably, the car safety device 12 includes a car door locking switch, a car door in-place contact, and may further include an escape door, a car roof emergency stop switch, a safety window or a safety gear, etc.;
the state information of the car safety device also reflects the states of an escape door, a car top emergency stop switch, a safety window or a safety gear.
Preferably, the hoistway safety device comprises a landing door locking switch, a landing door in-place contact and a safety door;
the hoistway safety device state information also reflects the state of the safety door.
In the elevator safety system of the first embodiment, the evaluation unit 1 directly obtains the real-time position and speed value of the car through the car absolute position sensor 4 through the first serial bus 5, and the elevator safety system is not affected by the stretching and shaking of the steel wire rope and the relative sliding of the steel wire rope and a traction machine wheel groove and can accurately obtain the position and speed of the car; the evaluation unit 1 directly obtains the real-time position and the speed value of the car and the state information of the safety device of the car through a serial bus, can quickly obtain the real-time position and the speed value of the car in low time delay, can obtain an accurate evaluation result, and closes or opens a safety relay contact inside the evaluation unit 1; the functions of uplink overspeed protection, normal deceleration monitoring protection safety and car accidental movement protection safety are realized; the real-time position and speed value of the car and the state information of the car safety device are respectively transmitted to the evaluation unit 1 through the first serial bus 5 and the second serial bus 6, the state information of the car safety device does not influence the transmission of the real-time position and speed value of the car to the evaluation unit 1, and the evaluation unit 1 can obtain the real-time position and speed value of the car quickly and slowly and can obtain an accurate evaluation result; the evaluation unit 1 obtains the real-time position and speed value of the car and the state information of the safety device of the car through the first serial bus 5 and the second serial bus 6, and the circuit is simple; the evaluation unit 1 accurately acquires the landing door state of each door zone position through the wire harness, the accidental movement protection of the lift car can be accurately realized, meanwhile, the evaluation unit is simple in control logic, low in false triggering risk, high in elevator reliability and good in passenger riding experience; the evaluation unit 1 is connected with the control cabinet 7 through a third serial bus 8, and informs the control cabinet 7 of other safety or non-safety related function state control information related to the position and speed of the elevator car and the state of the safety evaluation unit, which comprise the three safety functions, so that the control cabinet 7 executes a corresponding program, enters a corresponding state or performs corresponding operation, and can display the information on external interface equipment to ensure the safe and reliable operation of the elevator.
Example two
According to the elevator safety system of the first embodiment, the data transmission rate of the first safety serial bus 5 is the same as that of the second safety serial bus 6.
In the elevator safety system of the second embodiment, the data transmission rates of the first safety serial bus 5 and the second safety serial bus 6 are set to be the same, the real-time position and speed of the car and the information of the car safety node 2 are simultaneously transmitted to the evaluation unit 1, and the result obtained by evaluation by the evaluation unit 1 is the most accurate.
EXAMPLE III
According to the elevator safety system of the first embodiment, the first safety serial bus 5 has a higher data transfer rate than the second safety serial bus 6.
In the elevator safety system of the third embodiment, the data transmission rate of the first safety serial bus 5 is higher than that of the second safety serial bus 6, the evaluation unit 1 can acquire the real-time position and speed of the car earlier, a software algorithm can be added according to the real-time position and speed of the car, and the three safety functions can be realized for early protection or alarm.
Example four
According to the elevator safety system of the first embodiment, the control cabinet 7 transmits elevator shaft information to the evaluation unit 1;
the evaluation unit 1 compares the elevator shaft information with elevator shaft parameters preset in the evaluation unit 1 to judge the reliability of the evaluation unit.
EXAMPLE five
Based on the elevator safety system of the first embodiment, the control cabinet 7 sends the elevator state to the evaluation unit 1, so that the evaluation unit 1 judges the elevator operation safety and controls the elevator to start or stop correspondingly.
The evaluation unit 1 directly disconnects the safety circuit or stops the elevator after it is judged that the elevator is not safe to run.
After the evaluation unit 1 collects and logically judges the data of the three serial buses, the safety contact of the evaluation unit is closed or opened, and then the safety loop of the elevator is closed or opened, the dangerous state of any safety device triggers the safety contact of the evaluation unit to be opened, and then the safety loop of the elevator is closed, unless a bypass channel determined by a standard exists and the channel is connected. Meanwhile, the evaluation unit can also receive signals of other safety or non-safety devices to carry out logic judgment and execute safety or non-safety functions.
EXAMPLE six
According to the first embodiment, the elevator safety system further comprises a pit safety node 3;
the pit safety node 3 is connected to the evaluation unit 1 through a serial bus;
the pit safety node 3 is connected with the pit safety device 13 through a wire harness and receives the state information of the pit safety device 13;
the pit security node 3 transmits the received pit security device status information to the evaluation unit 1.
Preferably, the pit safety node 3 is connected to the evaluation unit 1 via a second serial bus 6.
The pit safety node is connected to the evaluation unit through a second serial bus.
The pit safety node and the car safety node can share the same second serial bus to be connected to the evaluation unit, and can also be respectively connected to the evaluation unit by adopting separate second serial buses.
Preferably, the pit safety node 3 further comprises a pit maintenance exit device 14 connected by a wire harness, receives the state information of the pit maintenance exit device and transmits the state information to the evaluation unit 1, so that the evaluation unit 1 can determine whether to exit the pit maintenance state.
Preferably, the evaluation unit sends an instruction to the pit security node to control the pit security node to start, stop, restart, perform self-checking and the like.
Preferably, the evaluation unit 1 sends a command to the car absolute position sensor 4 to control the car absolute position sensor 4 to start, stop, restart, perform self-checking, and the like.
Preferably, the evaluation unit 1 sends a command to the car safety node 2 to control the car safety node 2 to perform operations such as starting, stopping, restarting and self-checking.
Preferably, the evaluation unit 1 is connected to the machine room safety device 11 through a wire harness, and receives status information of the machine room safety device 11.
EXAMPLE seven
According to the embodiment, the control cabinet 7 is also connected with a car absolute position sensor 4 through a first serial bus 5;
the cage absolute position sensor 4 transmits the state information of the cage absolute position sensor and the real-time cage position and speed value to the control cabinet 7;
and the control cabinet 7 judges whether the absolute position sensor of the lift car is reliable or not according to the state information of the position sensor of the lift car, the real-time position and speed value of the lift car and the information fed back by a velometer arranged on the traction machine.
The above are merely preferred embodiments of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (24)
1. An elevator safety system is characterized by comprising an evaluation unit, a car absolute position sensor, a car safety node, a control cabinet, a shaft safety device, a first serial bus and a second serial bus;
the evaluation unit is connected with the car absolute position sensor through a first serial bus, connected with the car safety node through a second serial bus, and directly connected with a hoistway safety device through a wiring harness, wherein the hoistway safety device comprises a landing door locking switch;
the car absolute position sensor sends the real-time position and speed value of the car to the evaluation unit;
the car safety node is connected with a car safety device through a wire harness, receives state information of the car safety device and transmits the state information to the evaluation unit, and the state information of the car safety device reflects the state of a car door;
the state information of the hoistway safety device is transmitted to an evaluation unit, and the state information of the hoistway safety device reflects the state of a landing door;
the evaluation unit outputs a speed safety signal to the control cabinet according to whether the speed value of the lift car exceeds a set speed; outputting a signal whether the elevator is accidentally decelerated to the control cabinet according to the speed value of the elevator car, the real-time position of the elevator car and a preset normal deceleration protection curve of the elevator; and outputting a signal indicating whether the car accidentally moves to the control cabinet under the condition of opening the door according to the state information of the car safety device, the state information of the hoistway safety device, the speed value of the car, the real-time position of the car and preset parameters of the elevator hoistway.
2. Elevator safety system according to claim 1,
and the evaluation unit is connected with the control cabinet through a third serial bus.
3. Elevator safety system according to claim 1,
and the evaluation unit is used for differentiating the real-time position value of the car to obtain the real-time speed value of the car if the absolute position sensor of the car does not send the speed value.
4. Elevator safety system according to claim 1,
the set speed is set according to the rated speed value of the elevator and the additional allowance.
5. Elevator safety system according to claim 1,
the elevator shaft parameters comprise elevator shaft height, height of each floor, door opening range and re-leveling range.
6. Elevator safety system according to claim 1,
the car safety device comprises a car door locking switch and a car door in-place contact.
7. An elevator safety system as recited in claim 6,
the car safety device also comprises an escape door, a car top emergency stop switch, a safety window or a safety gear;
the state information of the car safety device also reflects the states of an escape door, a car top emergency stop switch, a safety window or a safety gear.
8. Elevator safety system according to claim 1,
the hoistway safety device also includes landing door-in-place contacts.
9. An elevator safety system as recited in claim 8,
the well safety device also comprises a safety door;
the hoistway safety device state information also reflects the state of the safety door.
10. Elevator safety system according to claim 1,
the data transmission rate of the first secure serial bus is the same as the data transmission rate of the second secure serial bus.
11. Elevator safety system according to claim 1,
the first secure serial bus has a higher data transfer rate than the second secure serial bus.
12. Elevator safety system according to claim 1,
the control cabinet sends elevator shaft information to the evaluation unit;
and the evaluation unit compares the elevator shaft information with the preset elevator shaft parameters in the evaluation unit to judge the reliability of the evaluation unit.
13. Elevator safety system according to claim 1,
and the control cabinet sends the elevator state to the evaluation unit, so that the evaluation unit judges the operation safety of the elevator and correspondingly controls the elevator to start or stop.
14. Elevator safety system according to claim 1,
the elevator safety system further comprises a pit safety node;
the pit safety node is connected to the evaluation unit through a serial bus;
the pit safety node is connected with the pit safety device through a wire harness and receives state information of the pit safety device;
the pit safety node transmits the received pit safety device status information to the evaluation unit.
15. An elevator safety system as recited in claim 14,
the pit safety node is connected to the evaluation unit through a second serial bus.
16. An elevator safety system as recited in claim 15,
the pit safety node and the car safety node share the same second serial bus to be connected to the evaluation unit.
17. An elevator safety system as recited in claim 15,
the pit safety node and the car safety node are respectively connected to the evaluation unit by a separate second serial bus.
18. An elevator safety system as recited in claim 14,
the pit safety node is further connected with a pit overhauling and withdrawing device through a wire harness, receives state information of the pit overhauling and withdrawing device and transmits the state information to the evaluation unit.
19. An elevator safety system as recited in claim 18,
and the evaluation unit determines whether to exit the pit overhauling state according to the pit overhauling exit device state information.
20. An elevator safety system as recited in claim 14,
and the evaluation unit sends an instruction to the pit safety node to control the pit safety node to start, stop, restart or self-check.
21. Elevator safety system according to claim 1,
and the evaluation unit sends a command to the car absolute position sensor to control the car absolute position sensor to start, stop, restart or self-check.
22. Elevator safety system according to claim 1,
and the evaluation unit sends a command to the car safety node to control the car safety node to start, stop, restart or self-check.
23. Elevator safety system according to claim 1,
and the evaluation unit is connected with the machine room safety device through a wire harness and receives the state information of the machine room safety device.
24. Elevator safety system according to claim 1,
the control cabinet is also connected with a car absolute position sensor through a first serial bus;
the car absolute position sensor transmits the state information of the car absolute position sensor and the real-time position and speed value of the car to the control cabinet;
and the control cabinet judges whether the absolute position sensor of the lift car is reliable or not according to the self state information of the position sensor of the lift car, the real-time position and speed value of the lift car and the information fed back by a velometer arranged on the traction machine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810263227.3A CN110316628B (en) | 2018-03-28 | 2018-03-28 | Elevator safety system |
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| CN201810263227.3A CN110316628B (en) | 2018-03-28 | 2018-03-28 | Elevator safety system |
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| CN110316628B true CN110316628B (en) | 2021-08-03 |
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| CN111874767A (en) * | 2020-07-02 | 2020-11-03 | 日立楼宇技术（广州）有限公司 | Elevator safety system, safety control method, device and storage medium |
| CN114371609A (en) * | 2020-10-15 | 2022-04-19 | 梅特勒-托利多(常州)测量技术有限公司 | Safety management system and method for detection equipment |
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| JP3937363B2 (en) * | 1997-09-09 | 2007-06-27 | 東芝エレベータ株式会社 | Elevator speed control device |
| JP2000318935A (en) * | 1999-05-11 | 2000-11-21 | Hitachi Building Systems Co Ltd | Elevator car arrival guidance device |
| JP4283963B2 (en) * | 2000-02-28 | 2009-06-24 | 三菱電機株式会社 | Elevator control device |
| CN1769155A (en) * | 2004-11-02 | 2006-05-10 | 陕西亿丰电子工程有限公司 | Data collecting device for elevator safety operation estimating and monitoring system |
| JP4403123B2 (en) * | 2005-09-21 | 2010-01-20 | 三菱電機株式会社 | Elevator equipment |
| CN103818794B (en) * | 2014-03-03 | 2016-06-08 | 中山市卓梅尼控制技术有限公司 | Prevent the protector of accidental movement of elevator cage |
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