CN111731959A - Elevator terminal detection protection device and detection protection method thereof - Google Patents
Elevator terminal detection protection device and detection protection method thereof Download PDFInfo
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- CN111731959A CN111731959A CN202010748299.4A CN202010748299A CN111731959A CN 111731959 A CN111731959 A CN 111731959A CN 202010748299 A CN202010748299 A CN 202010748299A CN 111731959 A CN111731959 A CN 111731959A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/36—Means for stopping the cars, cages, or skips at predetermined levels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/3492—Position or motion detectors or driving means for the detector
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- 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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- Automation & Control Theory (AREA)
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- Elevator Control (AREA)
Abstract
The invention provides an elevator terminal detection protection device, which comprises a light sensing module, a deceleration induction plate, a braking induction plate and a controller, wherein the light sensing module is arranged on an elevator car, the deceleration induction plate is used as a starting point of the elevator car entering a deceleration area, the braking induction plate is used as a starting point of the elevator car entering a braking area, and the controller is connected with an elevator control system; the deceleration induction plate and the stopping induction plate are both arranged on the wall of the elevator shaft or on the elevator guide rail; light sensing module and controller signal connection realize that light sensing module will send the sensing signal that obtains through speed reduction tablet and braking tablet to the controller to detect and safety protection slow down elevator car. The invention further provides a detection and protection method for the elevator terminal. The invention can effectively detect the state of the elevator running to the terminal, realize safe parking protection, and solve the safety protection problem of out-of-control and over-speed when the elevator runs to the terminal, thereby improving the safety and reliability of the elevator.
Description
Technical Field
The invention relates to the technical field of elevator safety, in particular to an elevator terminal detection and protection device and a detection and protection method thereof.
Background
Along with the improvement of the quality of life, elevators play an important role in the life of people, and the safe operation of the elevators is also gradually valued by the masses. There are various elevator detection technologies, wherein elevator terminal detection is an important detection item, but nowadays, elevator detection technologies still have much development space, and detection technologies are still imperfect.
The existing elevator terminal detection device is mainly installed on an elevator shaft, and detects whether the elevator runs to a position of terminal forced deceleration through the contact of a collision bow of an elevator car and a contact switch installed at a set position of a shaft terminal. The elevator terminal detection device needs to be installed at two terminals of a hoistway, wiring and wiring are complex, and the device only has detection function. There are a variety of detection methods in the existing market: a magnetic inductor is arranged on the lift car and used as a terminal deceleration point for detection, but the magnetic inductor can not be directly used for safety protection; and a magnetic grid ruler is also used for carrying out terminal detection and safety protection, but the cost is higher, a magnetic steel belt for measurement needs to be installed in the whole hoistway, the installation is complex, and the cost is high.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings in the prior art and provides an elevator terminal detection and protection device and a detection and protection method thereof; the invention can effectively detect the state of the elevator running to the terminal, realize safe parking protection and solve the safety protection problem of out-of-control and over-speed when the elevator runs to the terminal, thereby greatly improving the safety and reliability of the elevator; meanwhile, the invention is reliable and low in cost, and is beneficial to the comprehensive popularization of the elevator industry.
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides an elevator terminal detects protection device which characterized in that: the elevator control system comprises a light sensing module, a deceleration sensing plate, a braking sensing plate and a controller, wherein the light sensing module is used for being installed on an elevator car, the deceleration sensing plate is used as a starting point of the elevator car entering a deceleration area, the braking sensing plate is used as a starting point of the elevator car entering a braking area, and the controller is connected with an elevator control system;
the deceleration induction plate and the stopping induction plate are both arranged on the wall of the elevator shaft or on the elevator guide rail; light sensing module and controller signal connection realize that light sensing module will send the sensing signal that obtains through speed reduction tablet and braking tablet to the controller to detect and safety protection slow down elevator car.
In the above scheme, the light sensing module of the invention moves to the deceleration sensing plate along with the elevator car, and the obtained deceleration sensing signal is transmitted to the elevator control system by the controller to decelerate the elevator car, so that the deceleration sensing plate is used as the starting point of the elevator car entering the deceleration area. And the photoinduction module moves to the braking induction plate along with the elevator car, the controller can calculate the instant speed of the elevator operation according to the change of the photoinduction signal, and judge whether the elevator car is safely parked and protected or not according to the instant speed detection result, if the instant speed of the elevator is greater than a set value at the moment, the controller disconnects a safety contact connected to a safety loop of an elevator control system, the elevator car is controlled to be stopped in a terminal landing door area, and the braking induction plate is used as a starting point of the elevator car entering a braking area. The invention can effectively detect the state of the elevator running to the terminal, realize safe parking protection and solve the safety protection problem of out-of-control and over-speed when the elevator runs to the terminal. In addition, the elevator terminal detection protection device is simple in structure, and has the effects of low cost and convenience in installation. When the device works, the deceleration induction plate and the stop induction plate adopt the reflecting plates, the photoinduction module adopts a product of a light induction transmitting and receiving geminate transistor in the prior art, and receives an infrared light signal reflected by the reflecting plates by transmitting a light signal with a modulation code.
The light sensing module comprises a first light sensing module and a second light sensing module; the first light sensing module and the second light sensing module are arranged in the same vertical direction and are respectively arranged at the top of the elevator car. The distance between the first light sensing module and the second light sensing module is 40-50mm, and the distance between the first light sensing module and the second light sensing module and the deceleration sensing plate and the stop sensing plate is less than or equal to 100 mm.
The deceleration induction plate comprises a top terminal deceleration induction plate and a bottom terminal deceleration induction plate; the stop induction board comprises a top terminal stop induction board and a bottom terminal stop induction board;
the top terminal stopping induction plate is positioned above a top flat layer position of a top terminal layer door area; the top terminal deceleration induction plate is positioned between the top terminal braking induction plate and a top flat position of a top terminal landing door area;
or the top terminal deceleration sensing plate is positioned below the top flat position of the top terminal landing door area;
the bottom terminal stopping induction plate is positioned above a bottom flat layer position of a bottom terminal layer door area; the bottom terminal deceleration induction plate is positioned above the bottom terminal stopping induction plate.
The controller comprises a control module and a safety relay module connected with the control module; the safety contact of the safety relay module is connected in series with a safety circuit of the elevator control system; the control module is respectively connected with the light sensing module and the elevator control system to transmit the output deceleration signal to the elevator control system. The design of the safety relay module can effectively perform braking protection or limit protection on the operation of the elevator car.
The invention also comprises a self-learning module for acquiring braking and stopping speed; the self-learning module is connected with the controller. The self-learning module can acquire parameters in the normal running process of the elevator and can be used as judgment parameters or basis in the detection and protection process of the elevator terminal.
An elevator terminal detection protection method is characterized in that: installing a photoinduction module on an elevator car, and installing a deceleration induction plate and a braking induction plate on an elevator shaft wall or an elevator guide rail;
the light sensing module moves to the deceleration sensing plate along with the elevator car, and the obtained deceleration sensing signal is transmitted to the elevator control system by the controller to decelerate the elevator car;
the photoinduction module moves to the stop induction plate along with the elevator car, calculates the instant speed of the elevator operation to perform deceleration detection on the elevator car, judges whether to perform safe parking protection on the elevator car according to the deceleration detection result, and controls to disconnect the safety contact by the controller so that the elevator car is stopped in the terminal landing door area;
when the elevator car runs to the terminal leveling layer of the terminal floor door area, the elevator car is subjected to limit protection by detecting the change of the elevator door area signal, the controller is used for controlling the disconnection of the safety contact, and the elevator car is stopped to prevent the elevator car from over-travel movement. The invention detects the change of the elevator door zone signal, and carries out limit protection on the elevator car if the upper limit protection condition and the lower limit protection condition are met.
In the scheme, the elevator terminal detection protection method can not only perform deceleration control, deceleration detection and braking protection on the elevator car, but also ensure that the elevator car can safely park in the terminal landing door area, passengers can be safely evacuated after the protection is completed, and the elevator car is also subjected to limit protection, so that the use safety and reliability of the elevator are greatly improved. The safety parking protection is that the controller disconnects the output of the safety contact connected in series with the safety loop of the elevator control system, and the elevator car can be directly controlled to stop (park) in the terminal landing door area. The limit protection is to stop the elevator car and prevent the car from over-travel motion by disconnecting the safety contacts serially connected with the safety loop of the elevator control system through the controller.
The light sensing module comprises a first light sensing module and a second light sensing module; the first light sensing module and the second light sensing module are arranged in the same vertical direction and are respectively arranged at the top of the elevator car;
arranging a safety relay module with a safety contact, wherein the safety contact of the safety relay module is connected in series with a safety circuit of an elevator control system;
the elevator terminal detection and protection method comprises the following steps:
the method comprises the following steps that firstly, the running direction of an elevator car is determined according to the sequence of signals acquired by a first light sensing module and a second light sensing module;
secondly, the light sensing module moves to a deceleration sensing plate along with the elevator car and transmits an obtained deceleration sensing signal to an elevator control system through a controller so as to decelerate the elevator car;
thirdly, acquiring braking speed Vz(ii) a The photoinduction module moves to the braking induction plate along with the elevator car, and the obtained braking induction signal is used for calculating the real-time speed V of the elevatorjAnd running the instant speed V through the elevatorjAnd braking stop speed VzTo detect deceleration of the elevator car: when V isj<VzIf so, judging that the elevator car is decelerating, and performing a fifth step; otherwise, carrying out the fourth step;
fourthly, disconnecting a safety contact of the safety relay module, namely disconnecting the safety contact connected in series with a safety loop of the elevator control system through the controller, and stopping the elevator control system and releasing the brake, so that the elevator control system controls the elevator car to stop and is parked in the terminal landing door area; after the elevator car stops for N seconds, the safety relay module is restored to be connected, so that the elevator control system controls the elevator door of the elevator car to be opened to evacuate passengers; meanwhile, fault codes are output, and safe parking protection of the elevator car is realized; wherein N is a natural number and is more than or equal to 1;
fifthly, after the elevator car runs to the terminal leveling floor of the terminal floor door zone, detecting whether the elevator door zone signal changes: if the elevator door zone signal changes, the safety contact of the safety relay module is disconnected, namely the safety contact connected in series with the safety loop of the elevator control system is disconnected through the controller, so that the elevator control system stops running and releases the brake, the elevator car is protected in a limiting way, and the car is prevented from overtravel movement; otherwise, judging that the elevator car stops in the terminal floor door area, resetting the light sensing module and the safety relay module, and returning to the first step.
In the third step, the running instant speed V of the elevator is calculatedjThe method comprises the following steps: calculating the time T of the first photoinduction module or the second photoinduction module passing through the stop induction plateqBy the formula Vj＝L/TqCalculating to obtain the running of the elevatorInstantaneous velocity Vj(ii) a Wherein L is the length of the brake pad.
In the third step, the braking speed V is obtainedzThe method comprises the following steps: braking and stopping speed V is obtained through self-learning mode of normal operation of elevator carz(ii) a When the elevator car moves to the stopping induction plate, the calculated elevator running instant speed VjStopping speed Vz＝Vj× 200% if stop speed VzIf less than 0.4M/S, the braking speed VzSet to 0.4M/S, otherwise brake speed VzIs set to Vz＝Vj× 200%, braking speed V obtained by self-learning modezAnd storing. When the elevator terminal detection protection device is put into use, self-learning is required, when the elevator is confirmed to be in normal operation, the controller is set to be in a self-learning state (the self-learning input signal at the input end of the controller is enabled), the elevator operates once for the upper terminal and the lower terminal, and the braking and stopping speed V acquired by the self-learning mode is controlledzAfter the storage, the self-learning signal is cancelled, and the self-learning can be quitted.
The invention also comprises the steps of carrying out redundancy protection on the operation of the elevator car:
when the light sensing module I or the light sensing module II fails, in the first step, the running direction of the elevator car is determined by acquiring the sequence of signals of the elevator door area;
after determining the direction of travel of the elevator car by the sequence in which the signals of the elevator door zone are acquired, a delay TsJudging whether a deceleration induction signal is received or not, and if so, performing a second step; otherwise, delay T againzJudging whether a braking induction signal is received: and if the elevator car stopping protection is received, the third step is carried out, otherwise, the first photoinduction module and the second photoinduction module are judged to be invalid, and the safety contact of the safety relay module is disconnected, so that the elevator control system stops running and releases the brake, and the elevator car is protected from stopping.
The first light sensing module and the second light sensing module are independent, and if one of the light sensing modules fails, the detection and protection tasks can be completed by signals of a light sensor and an elevator door area without failure. When acquiring the elevator door zone signal, the terminal can be acquiredThe signal of the elevator door zone of the previous floor of the end floor detects whether the signals of the two elevator door zones have a specific change sequence when the elevator car reaches the position, thereby judging whether the elevator car is at the previous flat floor of the upper or lower terminal, if the car passes the previous flat floor of the upper or lower terminal at the moment, the car moves to the upper or lower terminal, the time delay T can be judgedsThen if the deceleration induction signal is not detected, delaying T againzAnd if the brake sensing signal is not received, the safety relay module is output and disconnected to enable the elevator to be stopped for protection, so that the situation that the elevator is flushed to the top or the bottom is squat is avoided. Wherein, TsAnd TzThe self-learning can be obtained by the self-learning module and stored in the controller.
The working process of the elevator terminal detection and protection device is as follows: adopt photoinduction module to install at elevator car top, set up speed reduction tablet and braking tablet (both are the reflector panel) at well or elevator guide rail. When the photoinduction module moves to the deceleration induction plate along with the elevator car, a deceleration induction signal is obtained, and the controller outputs the deceleration signal, so that the elevator control system controls the traction machine to decelerate and stop. When photoinduction module moves to the braking tablet along with elevator car, calculate the elevator and move the instant speed and come to slow down the detection to elevator car, if detect elevator car not yet slow down, then stop the protection to elevator car, the controller makes the safety contact disconnection of safety relay module, and the elevator braking is in terminal floor door zone. When the elevator car runs to the terminal leveling layer of the terminal floor door area, the elevator car is subjected to limit protection by detecting the change of the elevator door area signal, the controller enables the safety contact of the safety relay module to be disconnected, and the elevator car is stopped, so that the safety protection effect is achieved.
Compared with the prior art, the invention has the following advantages and beneficial effects: the elevator terminal detection protection device and the detection protection method thereof can effectively detect the state of the elevator running to the terminal, realize safe parking protection, and solve the safety protection problem of out-of-control and over-speed when the elevator runs to the terminal, thereby improving the safety and reliability of the elevator; meanwhile, the invention is reliable and low in cost, and is beneficial to the comprehensive popularization of the elevator industry.
Drawings
Fig. 1 is a schematic view of an elevator terminal detection protection device of the present invention installed at a top terminal;
fig. 2 is a schematic view of the elevator terminal detection protection device of the present invention installed at the bottom terminal;
fig. 3 is an electrical schematic of the elevator terminal detection protection arrangement of the present invention;
fig. 4 is a diagrammatic illustration of curves of the nominal operating speed of the elevator, the deceleration distance of the elevator car and the braking distance of the elevator car;
fig. 5 is a flow chart of an elevator terminal detection protection method of the present invention;
the elevator control system comprises an elevator car 1, a photoinduction module SSU 2, a photoinduction module SSD 3, a controller 4, an elevator guide rail 5, a top terminal deceleration induction plate 6, a bottom terminal deceleration induction plate 7, a top terminal stop induction plate 8, a bottom terminal stop induction plate 9, a top terminal stop induction plate 10, a top terminal landing door zone 11, a top landing position 12, a control module MCU 12, a safety relay module 13, an elevator control system 14, a power supply module 15, a self-learning module 16, a door zone signal input module 17, a bottom terminal landing door zone 18 and a bottom landing position 19.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Examples
As shown in fig. 1 to 5, the elevator terminal detection protection device of the present invention includes a photo sensing module-SSU 2 and a photo sensing module-SSD 3 for mounting on an elevator car 1, a deceleration sensing plate for serving as a starting point of the elevator car 1 entering a deceleration area, a stop sensing plate for serving as a starting point of the elevator car 1 entering a stop area, and a controller 4 connected to an elevator control system. The first photoinduction module SSU 2 and the second photoinduction module SSD 3 are arranged on the top of the elevator car 1 in the same vertical direction. The distance between the first light sensing module SSU 2 and the second light sensing module SSD 3 is 40-50mm, and the distance between the first light sensing module SSU 2 and the second light sensing module SSD 3 is less than or equal to 100 mm.
The speed reduction induction plate and the stopping induction plate are both arranged on an elevator guide rail 5, the speed reduction induction plate comprises a top terminal speed reduction induction plate 6 and a bottom terminal speed reduction induction plate 7, and the stopping induction plate comprises a top terminal stopping induction plate 8 and a bottom terminal stopping induction plate 9; wherein, top layer terminal braking tablet 8 is located above top layer flat position 11 of top layer terminal layer door zone 10, and top layer terminal deceleration tablet 6 (marked with a solid line of 6 in fig. 1) is located between top layer terminal braking tablet 8 and top layer flat position 11 of top layer terminal layer door zone 10, or top layer terminal deceleration tablet 6 (marked with a dotted line of 6 in fig. 1) is located below top layer flat position 11 of top layer terminal layer door zone 10. Bottom end stop induction plate 9 is positioned above bottom end stop door zone 18 and bottom end deceleration induction plate 7 (shown in solid or dashed lines at 7 in fig. 2) is positioned above bottom end stop induction plate 9.
The top flat position 11 is below the first optical sensing module SSU 2 and the second optical sensing module SSD 3: the distance from the top terminal braking induction plate 8 to the first photo-sensing module SSU 2 and the second photo-sensing module SSD 3 is a braking distance Lzt; the distance from the top terminal deceleration sensing board 6 to the first optical sensing module SSU 2 and the second optical sensing module SSD 3 is a deceleration distance SS.
The bottom floor leveling position 19 is above the first optical sensing module SSU 2 and the second optical sensing module SSD 3: the distance from the bottom-layer terminal braking sensing board 9 to the first photo-sensing module SSU 2 and the second photo-sensing module SSD 3 is the braking distance Lzt, and the distance from the bottom-layer terminal deceleration sensing board 7 to the first photo-sensing module SSU 2 and the second photo-sensing module SSD 3 is the deceleration distance SS.
The embodiment can obtain the corresponding deceleration distance SS and braking distance L according to the rated running speed of the elevator in the chart of FIG. 4ztThereby obtaining the installation positions of the deceleration sensing plate and the braking sensing plate.
According to the elevator car deceleration detection system, the first photoinduction module SSU 2 and the second photoinduction module SSD 3 are respectively in signal connection with the controller 4, so that the first photoinduction module SSU 2 or the second photoinduction module SSD 3 can send induction signals obtained through the deceleration induction plate and the braking induction plate to the controller 4, and deceleration detection and safety protection are carried out on the elevator car 1.
As shown in fig. 3, the controller 4 of the present invention includes a control module MCU 12, a safety relay module 13, a power module 15, and a self-learning module 16 for obtaining braking and stopping speed, wherein the safety relay module 13, the power module 15, and the self-learning module 16 are all connected to the control module MCU 12; the safety contact of the safety relay module 13 is connected in series with the safety loop of the elevator control system 14, and the control module MCU 12 is respectively connected with the photoinduction module I SSU 2, the photoinduction module II SSD 3 and the elevator control system 14. The controller 4 further comprises a door zone signal input module 17, and the door zone signal of the elevator is connected with the control module MCU 12 through the door zone signal input module 17. The safety relay module 13 is designed to effectively perform braking protection or limit protection on the operation of the elevator car 1. Fig. 3 is a schematic working diagram of the first photo-sensing module SSU 2, the second photo-sensing module SSD 3 and the top terminal deceleration sensing board 6, and the schematic working diagrams of the first photo-sensing module SSU 2 and the second photo-sensing module SSD 3, the bottom terminal deceleration sensing board 7, the top terminal stop sensing board 8 and the bottom terminal stop sensing board 9 are the same as fig. 3.
The elevator terminal detection protection method of the invention is as follows: the light sensing module moves to the deceleration sensing plate along with the elevator car, and the obtained deceleration sensing signal is transmitted to the elevator control system 14 by the controller 4 to decelerate the elevator car;
the photoinduction module moves to the braking induction plate along with the elevator car, calculates the instant speed of the elevator operation to perform deceleration detection on the elevator car, judges whether to perform braking protection on the elevator car according to the deceleration detection result, and controls to disconnect the safety contact by the controller so that the elevator car is braked and stopped in the terminal floor door area;
when the elevator car runs to the terminal leveling layer of the terminal floor door area, the elevator car is subjected to limit protection by detecting the change of the elevator door area signal, the controller is used for controlling the disconnection of the safety contact, and the elevator car is stopped to prevent the elevator car from over-travel movement.
The method specifically comprises the following steps:
firstly, determining the running direction of the elevator car 1 according to the sequence of the signals acquired by the first light sensing module SSU 2 and the second light sensing module SSD 3;
secondly, the first optical sensing module SSU 2 and the second optical sensing module SSD 3 move to a top terminal deceleration induction plate 6 or a bottom terminal deceleration induction plate 7 along with the elevator car 1, and the obtained deceleration induction signals are transmitted to an elevator control system 14 through a controller 4 to decelerate the elevator car 1;
thirdly, acquiring braking speed Vz(ii) a The first photoinduction module SSU 2 and the second photoinduction module SSD 3 move to the top terminal stopping induction plate 8 or the bottom terminal stopping induction plate 9 along with the elevator car 1, and the real-time speed V of the elevator running is calculated after the obtained stopping induction signalsjAnd running the instant speed V through the elevatorjAnd braking stop speed VzTo detect deceleration of the elevator car 1: when V isj<VzIf so, judging that the elevator car 1 is decelerating, and performing a fifth step; otherwise, carrying out the fourth step;
fourthly, the safety contacts of the safety relay module 13 are disconnected, namely the safety contacts connected in series with the safety loop of the elevator control system 14 are disconnected through the controller 4, the elevator control system 14 stops running and releases the brake, so that the elevator control system 14 controls the elevator car 1 to stop and stop in the top terminal landing door area 10 or the bottom terminal landing door area 18; after the elevator car stops for 1 second, the safety contact connected with the safety relay module 13 is recovered, so that the elevator control system 14 controls the elevator door of the elevator car 1 to be opened to evacuate passengers; and meanwhile, the fault code is output, so that the safe parking protection of the elevator car 1 is realized, and the effect of safely parking the elevator car in the terminal landing door area is achieved.
Fifthly, after the elevator car 1 runs to the top floor leveling position 11 of the top floor terminal floor door zone 10, or after the elevator car 1 runs to the bottom floor leveling position 19 of the bottom floor terminal floor door zone 18, detecting whether the elevator door zone signal changes: if the elevator door zone signal changes, the safety contact of the safety relay module 13 is disconnected, so that the elevator control system 14 stops running and releases the brake, the elevator car 1 is protected in a limit mode, the elevator car 1 is prevented from over-travel movement, and the elevator car 1 is prevented from moving over a safe distance to the top or the bottom; otherwise, the elevator car 1 is judged to stop in the top terminal landing door area 10 or the bottom terminal landing door area 18, at this time, the first light sensing module SSU 2, the second light sensing module SSD 3 and the safety relay module 13 are reset, and the first step is returned.
In the third step, the running instant speed V of the elevator is calculatedjThe method comprises the following steps: calculating the time T of the first SSU 2 or the second SSD 3 of the photo-sensing module passing through the top terminal stop induction board 8 or the bottom terminal stop induction board 9qBy the formula Vj＝L/TqThe real-time speed V of the elevator running is obtained by calculationj(ii) a Where L is the length of the top or bottom end stop induction plate 8, 9.
In the third step, the braking speed V is obtainedzThe method comprises the following steps: braking speed V is obtained through self-learning mode of normal operation of elevator car 1z(ii) a When the elevator car 1 moves to the top terminal stopping induction plate 8 or the bottom terminal stopping induction plate 9, the calculated elevator running instant speed VjStopping speed Vz＝Vj× 200% if stop speed VzIf less than 0.4M/S, the braking speed VzSet to 0.4M/S, otherwise brake speed VzIs set to Vz＝Vj× 200%, the controller can obtain the braking speed V in a self-learning modezAnd storing. When the elevator terminal detection protection device is put into use, self-learning is required, when the elevator is confirmed to be in normal operation, the controller 4 is set to be in a self-learning state (the self-learning input signal at the input end of the controller 4 is enabled), the elevator operates once for the upper terminal and the lower terminal, and the braking and stopping speed V acquired by the self-learning mode is obtainedzAfter the storage, the self-learning signal of the self-learning module 16 is cancelled, and the self-learning is quitted.
The invention also comprises the steps of carrying out redundancy protection on the operation of the elevator car:
when the first light sensing module SSU 2 or the second light sensing module SSD 3 fails, in the first step, the running direction of the elevator car 1 is determined by acquiring the sequence of elevator door zone signals;
when the controller 4 determines the electricity by acquiring the sequence of the elevator door zone signalsAfter the running direction of the elevator cage 1, T is delayedsJudging whether a deceleration induction signal is received or not, and if so, performing a second step; otherwise, delay T againzJudging whether a braking induction signal is received: and if the information is received, performing the third step, otherwise, judging that the first light sensing module SSU 2 and the second light sensing module SSD 3 are both invalid, and switching off the safety relay module 13, so that the elevator control system 14 stops running and releases a brake, thereby realizing braking protection of the elevator car 1.
The working process of the elevator terminal detection and protection device is as follows: adopt photoinduction module to install at 1 tops of elevator car, set up speed reduction tablet and braking tablet (both are the reflector panel) at elevator guide rail 5. When the photoinduction module moves to the deceleration induction plate along with the elevator car, a deceleration induction signal is obtained, and the controller outputs the deceleration signal, so that the elevator controller controls the traction machine to decelerate and stop. When photoinduction module moves to the braking tablet along with elevator car, calculate the elevator and move the instant speed and come to slow down the detection to elevator car 1, if detect elevator car 1 not yet slow down, then stop the protection to elevator car 1, make safety relay module 13's safety contact disconnection, the elevator braking is in terminal floor door district. After the elevator car 1 runs to the terminal leveling of the terminal floor door area, the elevator car 1 is subjected to limit protection by detecting the change of the elevator door area signal, and the elevator car 1 is stopped, so that the safety protection effect is achieved.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The utility model provides an elevator terminal detects protection device which characterized in that: the elevator control system comprises a light sensing module, a deceleration sensing plate, a braking sensing plate and a controller, wherein the light sensing module is used for being installed on an elevator car, the deceleration sensing plate is used as a starting point of the elevator car entering a deceleration area, the braking sensing plate is used as a starting point of the elevator car entering a braking area, and the controller is connected with an elevator control system;
the deceleration induction plate and the stopping induction plate are both arranged on the wall of the elevator shaft or on the elevator guide rail; light sensing module and controller signal connection realize that light sensing module will send the sensing signal that obtains through speed reduction tablet and braking tablet to the controller to detect and safety protection slow down elevator car.
2. The elevator terminal detection protection device of claim 1, wherein: the light sensing module comprises a first light sensing module and a second light sensing module; the first light sensing module and the second light sensing module are arranged in the same vertical direction and are respectively arranged at the top of the elevator car.
3. The elevator terminal detection protection device of claim 1, wherein: the deceleration induction plate comprises a top terminal deceleration induction plate and a bottom terminal deceleration induction plate; the stop induction board comprises a top terminal stop induction board and a bottom terminal stop induction board;
the top terminal stopping induction plate is positioned above a top flat layer position of a top terminal layer door area; the top terminal deceleration induction plate is positioned between the top terminal braking induction plate and a top flat position of a top terminal landing door area; or the top terminal deceleration sensing plate is positioned below the top flat position of the top terminal landing door area;
the bottom terminal stopping induction plate is positioned above a bottom flat layer position of a bottom terminal layer door area; the bottom terminal deceleration induction plate is positioned above the bottom terminal stopping induction plate.
4. The elevator terminal detection protection device of claim 1, wherein: the controller comprises a control module and a safety relay module connected with the control module; the safety contact of the safety relay module is connected in series with a safety circuit of the elevator control system; and the control module is respectively connected with the light sensing module and the elevator control system.
5. The elevator terminal detection protection device of claim 1, wherein: the self-learning module is used for acquiring braking and stopping speed; the self-learning module is connected with the controller.
6. An elevator terminal detection protection method is characterized in that: installing a photoinduction module on an elevator car, and installing a deceleration induction plate and a braking induction plate on an elevator shaft wall or an elevator guide rail;
the light sensing module moves to the deceleration sensing plate along with the elevator car, and the obtained deceleration sensing signal is transmitted to the elevator control system by the controller to decelerate the elevator car;
the photoinduction module moves to the stop induction plate along with the elevator car, calculates the instant speed of the elevator operation to perform deceleration detection on the elevator car, judges whether to perform safe parking protection on the elevator car according to the deceleration detection result, and controls to disconnect the safety contact by the controller so that the elevator car is stopped in the terminal landing door area;
when the elevator car runs to the terminal leveling layer of the terminal floor door area, the elevator car is subjected to limit protection by detecting the change of the elevator door area signal, the controller is used for controlling the disconnection of the safety contact, and the elevator car is stopped to prevent the elevator car from over-travel movement.
7. The elevator terminal detection protection method according to claim 6, characterized in that: the light sensing module comprises a first light sensing module and a second light sensing module; the first light sensing module and the second light sensing module are arranged in the same vertical direction and are respectively arranged at the top of the elevator car;
arranging a safety relay module with a safety contact, wherein the safety contact of the safety relay module is connected in series with a safety circuit of an elevator control system;
the elevator terminal detection and protection method comprises the following steps:
the method comprises the following steps that firstly, the running direction of an elevator car is determined according to the sequence of signals acquired by a first light sensing module and a second light sensing module;
secondly, the light sensing module moves to a deceleration sensing plate along with the elevator car and transmits an obtained deceleration sensing signal to an elevator control system through a controller so as to decelerate the elevator car;
thirdly, acquiring braking speed Vz(ii) a The photoinduction module moves to the braking induction plate along with the elevator car, and the obtained braking induction signal is used for calculating the real-time speed V of the elevatorjAnd running the instant speed V through the elevatorjAnd braking stop speed VzTo detect deceleration of the elevator car: when V isj<VzIf so, judging that the elevator car is decelerating, and performing a fifth step; otherwise, carrying out the fourth step;
fourthly, disconnecting a safety contact of the safety relay module, namely disconnecting the safety contact connected in series with a safety loop of the elevator control system through the controller, and stopping the elevator control system and releasing the brake, so that the elevator control system controls the elevator car to stop and is parked in the terminal landing door area; after the elevator car stops for N seconds, the safety relay module is restored to be connected, so that the elevator control system controls the elevator door of the elevator car to be opened to evacuate passengers; meanwhile, fault codes are output, and safe parking protection of the elevator car is realized; wherein N is a natural number and is more than or equal to 1;
fifthly, after the elevator car runs to the terminal leveling floor of the terminal floor door zone, detecting whether the elevator door zone signal changes: if the elevator door zone signal changes, the safety contact of the safety relay module is disconnected, namely the safety contact connected in series with the safety loop of the elevator control system is disconnected through the controller, so that the elevator control system stops running and releases the brake, the elevator car is protected in a limiting way, and the car is prevented from overtravel movement; otherwise, judging that the elevator car stops in the terminal floor door area, resetting the light sensing module and the safety relay module, and returning to the first step.
8. The elevator terminal detection protection method according to claim 7, characterized in that: in the third step, the running instant speed V of the elevator is calculatedjThe method comprises the following steps: calculating the passing of the photoinduction module I or the photoinduction module IITime T of brake induction plateqBy the formula Vj＝L/TqThe real-time speed V of the elevator running is obtained by calculationj(ii) a Wherein L is the length of the brake pad.
9. The elevator terminal detection protection method according to claim 8, characterized in that: in the third step, the braking speed V is obtainedzThe method comprises the following steps: braking and stopping speed V is obtained through self-learning mode of normal operation of elevator carz(ii) a When the elevator car moves to the stopping induction plate, the calculated elevator running instant speed VjStopping speed Vz＝Vj× 200% if stop speed VzIf less than 0.4M/S, the braking speed VzSet to 0.4M/S, otherwise brake speed VzIs set to Vz＝Vj× 200%, braking speed V obtained by self-learning modezAnd storing.
10. The elevator terminal detection protection method according to claim 7, characterized in that: the method also comprises the following steps of carrying out redundancy protection on the operation of the elevator car:
when the light sensing module I or the light sensing module II fails, in the first step, the running direction of the elevator car is determined by acquiring the sequence of signals of the elevator door area;
after determining the direction of travel of the elevator car by the sequence in which the signals of the elevator door zone are acquired, a delay TsJudging whether a deceleration induction signal is received or not, and if so, performing a second step; otherwise, delay T againzJudging whether a braking induction signal is received: and if the elevator car stopping protection is received, the third step is carried out, otherwise, the first photoinduction module and the second photoinduction module are judged to be invalid, and the safety contact of the safety relay module is disconnected, so that the elevator control system stops running and releases the brake, and the elevator car is protected from stopping.
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