CN111377341A - Elevator car door closing control device - Google Patents
Elevator car door closing control device Download PDFInfo
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- CN111377341A CN111377341A CN201811618928.0A CN201811618928A CN111377341A CN 111377341 A CN111377341 A CN 111377341A CN 201811618928 A CN201811618928 A CN 201811618928A CN 111377341 A CN111377341 A CN 111377341A
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- elevator car
- door
- car door
- elevator
- closing control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/02—Door or gate operation
- B66B13/14—Control systems or devices
- B66B13/143—Control systems or devices electrical
- B66B13/146—Control systems or devices electrical method or algorithm for controlling doors
Abstract
The invention discloses a door closing control device for an elevator car, which comprises a sampling circuit, a control circuit, a door driving device and at least two weighing devices, wherein the sampling circuit is used for sampling the door closing control device; the weighing devices are uniformly arranged below the bottom plate of the elevator car and used for detecting the weight in the elevator car and outputting weight analog signals; the sampling circuit samples the weight analog signal and outputs a weight sampling digital signal to the control circuit; the control circuit controls the door driving device to work according to the weight sampling digital signal to drive the elevator car door to close. The door closing control device for the elevator car can accurately judge whether passengers finish entering and exiting the elevator car, automatically adjust the time for closing the door of the elevator each time, increase the elevator riding comfort of the passengers, prolong the service life of the door opening and closing button and improve the operation efficiency of the elevator.
Description
Technical Field
The invention relates to an elevator control technology, in particular to an elevator car door closing control device.
Background
The high-rise buildings and the buildings are pulled out with the rapid development of cities, the elevator enables the high-rise building traffic to be faster and more convenient, and the vertical traffic tool also becomes one of the essential special devices for people's life. The door closing time of the existing elevator is set before leaving a factory and cannot be adjusted according to the change of the passenger flow, but the time required for passengers to get on and off the elevator is different according to the different passenger flow, so people often suffer from the trouble that the door of the elevator is closed too fast or too slow. Sometimes, because the elevator is crowded, the door closing time is too short, and the passenger can not get out of the elevator in time, leads to opening again after the door is closed, increases the waiting time on foot. Some passengers fail to reach in time to prevent the elevator from being closed due to the fear of people clamping the elevator door, so that the passengers miss getting on or off the elevator.
When only one or two passengers take the elevator, the opening time of the car door is too long, so that the passengers can press the door closing button impatiently. Some passengers can not get off the elevator in time because of the congestion of the elevator car, and the elevator door can be opened again by continuously pressing the door opening button. Sometimes a gentleman appears with arm fencing post elevator doors to allow companions to advance the elevator. These all influence the passenger and take the experience of elevator and feel, waste and take advantage of the ladder time, bring inconvenience for the passenger. Meanwhile, unnecessary loss of the door opening and closing button is caused, and the service life of the button is shortened.
In addition, some patents provide solutions for controlling the opening and closing time and speed of the car, particularly the car door. For example, chinese patent document CN107265213A discloses an elevator control method, which obtains three-dimensional image data in a car through a camera to determine whether there is a vulnerable group in the car, so as to control the car to take corresponding countermeasures. From the shooting range which can be covered by the camera and the image processing example in the text, the image processing device in the text cannot give consideration to passengers on the elevator car and the landing side (namely, the region where the passengers gather just before taking the elevator).
Disclosure of Invention
The invention aims to solve the technical problem of providing an elevator car door closing control device which can accurately judge whether passengers finish entering and exiting the elevator car and automatically adjust the time for closing the door of the elevator each time, thereby not only increasing the riding comfort of the passengers, but also prolonging the service life of a door opening and closing button and improving the operation efficiency of the elevator.
In order to solve the technical problem, the elevator car door closing control device provided by the invention comprises a sampling circuit, a control circuit, a door driving device and at least two weighing devices;
the weighing devices are uniformly arranged below a bottom plate of the elevator car and used for detecting the weight in the elevator car and outputting weight analog signals;
the sampling circuit is used for sampling the weight analog signal and outputting a weight sampling digital signal to the control circuit;
the control circuit controls the door driving device to work according to the weight sampling digital signal to drive the elevator car door to close;
the control circuit comprises an iteration counter, a sampling counter and a timer, and the working process of the control circuit is as follows:
at the set time of the process that the door driving device drives the elevator car door to open, the counting value S of the iterative counter is made to be 0, the counting value j of the sampling counter is made to be 1, the timing value T of the timer is made to be 0 and starts to time, and the weight sampling digital signal is started to be received;
receiving first to ith weight samples N1, N2, N3, … … and Ni, i being an integer greater than 1;
receiving an i + j th weight sample Ni + j;
if T is less than Tn and Tn is the maximum door opening time, performing the fifth step; otherwise, carrying out the step eight;
if S is less than q, and q is a positive integer, then carrying out the sixth step; otherwise, carrying out the step eight;
ni-1 ═ Ni was performed for N1, N2, N3, … …, and Ni-1; ni is Ni ═ Ni + j;
if Nmax-Nmin is less than M and M is the set maximum fluctuation value, S is equal to S +1, j is equal to j +1, and then step three is carried out; otherwise, S is 0, j is j +1, and then step three is carried out;
nmax is the maximum of N1, N2, N3, … … and Ni;
nmin is the minimum of N1, N2, N3, … … and Ni;
and eighthly, controlling the door driving device to work, driving the elevator car door to close, and ending.
Preferably, the set time at which the door driving device drives the elevator car door opening process is a time at which the elevator car door opening process starts to open, at which the opening ends, or before the opening ends.
Preferably, q is 2 to 10;
tn is 4 seconds to 6 seconds.
Preferably, the sampling period t is 0.01 to 0.02 seconds, and i is 5 to 20.
Preferably, the elevator car door closing control device comprises two weighing devices;
the two weighing devices are arranged under two opposite corners of the floor of the elevator car.
Preferably, the elevator car door closing control device comprises four weighing devices, and the four weighing devices are arranged below four corners of the elevator car bottom plate.
Preferably, the weighing device comprises a differential transformer and a signal conversion circuit;
the differential transformer is used for outputting an alternating current analog voltage signal according to the received pressure;
the signal conversion circuit is used for converting the alternating current voltage signal output by the differential transformer into a direct current analog voltage signal and outputting the direct current analog voltage signal.
Preferably, the differential transformer includes a primary coil, two secondary coils and an iron core;
the signal conversion circuit also supplies power to the primary side coil;
the voltage difference between the output terminals of the two secondary side coils is used as an alternating current analog voltage signal output by the differential transformer;
when the iron core is in the central position, the mutual inductance of the two secondary side coils is the same, and the voltage difference between the output terminals of the two secondary side coils is zero at the moment;
when the pressure applied to the iron core makes the iron core displace up and down, the voltage difference generated between the output terminals of the two secondary side coils is a positive value or a negative value.
Preferably, the weighing device is fixed on the side plate of the car through a support frame;
the iron core is connected with a connecting rod;
the connecting rod penetrates through the upper side plate;
a return spring is arranged between the connecting rod and the upper side plate of the support frame;
when the connecting rod is pressed down, the iron core moves downwards, the differential transformer outputs corresponding alternating current analog voltage signals, and meanwhile, the return spring is also correspondingly compressed;
when the pressure applied to the connecting rod disappears, the return spring rebounds to enable the connecting rod to drive the iron core to recover to the central position, and at the moment, the differential transformer outputs an alternating current analog voltage signal with zero voltage.
Preferably, the spring plate on the horseshoe-shaped spring mounting piece is fixedly mounted below the car bottom plate;
the upper side plate of the support frame is fixedly arranged below the lower spring plate of the horseshoe-shaped spring mounting piece;
the connecting rod penetrates through an upper side plate of the support frame and a lower spring plate of the horseshoe-shaped spring mounting piece;
the upper end of the connecting rod is abutted against the lower side surface of the upper spring plate of the horseshoe-shaped spring mounting piece;
when the load in the car changes, the bottom plate of the car sinks to enable the U-shaped spring mounting piece to generate corresponding deformation, and the connecting rod of the differential transformer is pressed down to drive the iron core to generate corresponding up-down displacement.
Preferably, the signal conversion circuit is arranged in the car top station;
the control circuit is arranged in the control cabinet;
the control circuit is connected with the signal conversion circuit through a traveling cable of the elevator.
The invention relates to a door closing control device of an elevator car, wherein a control circuit processes i weight sampling data which are collected latest. If the difference between the maximum value and the minimum value in the i weight sampling data is less than a certain fixed value M and the difference between the maximum value and the minimum value in the continuous judging section q times is less than the certain fixed value M, the passenger is judged to have finished entering or exiting the lift car, further controlling the door driving device to work in time to drive the elevator car door to close, accurately judging whether the passenger finishes entering and exiting the elevator car according to the fluctuation of the acting force of the passenger on the elevator car bottom plate in the elevator car obtained by actual measurement, automatically adjusting the time of closing the elevator door each time, when the flow of people is large, the proper extension of the door closing time also eliminates the unnecessary operation that the door is closed and then opened when the passengers get on or off the elevator, and when the flow of people is small, the system also properly shortens the door closing time, these all shorten and take advantage of the ladder latency, have both increased the passenger and taken advantage of the ladder good sensitivity while having prolonged the life of switch door button again, have promoted the operating efficiency of elevator.
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 structural view of an embodiment of a door closing control apparatus for an elevator car according to the present invention;
fig. 2 is a schematic view of a differential transformer of a weighing device of an embodiment of the elevator car door closing control apparatus of the present invention;
fig. 3 is a schematic view of a weighing device of an embodiment of the elevator car door closing control apparatus of the present invention mounted to a support frame;
fig. 4 is a schematic view of a weighing device of an embodiment of the door closing control apparatus for an elevator car according to the present invention installed under a car floor;
fig. 5 is a schematic diagram of the operation of the control circuit of the elevator car door closing control apparatus according to an embodiment of the present invention.
Description of reference numerals:
1, weighing device; 10 iron cores; 11 primary side coil; 12 a secondary side coil; 13 connecting rods; 14 a return spring; 2, a door driving device; 5, a car top station; 6 a car floor; 7 a horseshoe spring mount; 8, supporting frames; 81 support the upper side plate of the frame.
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 to 4, the door closing control device for the elevator car comprises a sampling circuit, a control circuit, a door driving device 2 and at least two weighing devices 1;
the weighing devices 1 are uniformly arranged below a bottom plate 6 of the elevator car and used for detecting the weight in the elevator car and outputting weight analog signals;
the sampling circuit is used for sampling the weight analog signal and outputting a weight sampling digital signal to the control circuit;
the control circuit controls the door driving device 2 to work according to the weight sampling digital signal to drive the elevator car door to close;
the control circuit comprises an iteration counter, a sampling counter and a timer, and as shown in fig. 5, the working process of the control circuit is as follows:
at the set time of the process that the door driving device drives the elevator car door to open, the counting value S of the iterative counter is made to be 0, the counting value j of the sampling counter is made to be 1, the timing value T of the timer is made to be 0 and starts to time, and the weight sampling digital signal is started to be received;
receiving first to ith weight samples N1, N2, N3, … and Ni, i being an integer greater than 1;
receiving an i + j th weight sample Ni + j;
if T is less than Tn and Tn is the maximum door opening time, performing the fifth step; otherwise, carrying out the step eight;
if S is less than q, and q is a positive integer, then carrying out the sixth step; otherwise, carrying out the step eight;
n1, N2, N3, … and Ni-1 are processed by Ni-1 ═ Ni, that is, N1 ═ N2, N2 ═ N3, N3 ═ N4, …, and Ni-1 ═ Ni; ni is Ni ═ Ni + j;
if Nmax-Nmin is less than M and M is the set maximum fluctuation value, S is equal to S +1, j is equal to j +1, and then step three is carried out; otherwise, S is 0, j is j +1, and then step three is carried out;
nmax is the maximum of N1, N2, N3, … … and Ni, Max [ N1, N2, N3, … …, Ni ];
nmin is the minimum of N1, N2, N3, … … and Ni, Min ═ Min [ N1, N2, N3, … …, Ni ];
and eighthly, controlling the door driving device to work, driving the elevator car door to close, and ending.
Preferably, the set time at which the door driving device drives the elevator car door opening process is a time at which the elevator car door opening process starts to open, at which the opening ends, or before the opening ends.
Preferably, q is 2 to 10.
Preferably, Tn is 4 seconds to 6 seconds.
Preferably, the sampling period t is 0.01 to 0.02 seconds, and i is 5 to 20.
The time interval of sampling is defined as t, and after a certain sampling, the weight sampling (the acting force of passengers in the car on the car floor) at the time t1 is obtained as N1. Then the control circuit obtains the forces of the passengers in the car to the car floor at the moments t1, t2 and t3 … ti as N1, N2 and N3 … Ni respectively after i times of sampling. .
Defining Tn as the maximum door opening time of the default elevator car, and automatically executing closing action of the elevator car door after the door opening time of the elevator car reaches Tn.
Defining the iteration number as q, and ensuring that the door of the elevator is closed for q times continuously to meet the condition of Nmax-Nmin < M.
The parameters M, i, t, Tn, q will be set according to the actual situation.
The weighing device actually detects the magnitude of the force applied by a person to the car floor, and the magnitude is equal to the support force of the car floor to the person, and the force is in relation to the reaction force. When a person walks, the gravity center moves up and down along with the person, when the gravity center moves up, the acceleration is upward, namely the resultant force at the gravity center is upward, the supporting force of the bottom plate of the lift car to the person is greater than the gravity of the person, and the value detected by the weighing device is larger than the gravity of the person; on the contrary, when the gravity center moves downwards, the acceleration is downward, namely the resultant force at the gravity center is downward, the supporting force of the car bottom plate to the person is smaller than the gravity of the person, and the value detected by the weighing device is smaller than the gravity of the person. Therefore, the acting force on the bottom plate of the elevator car is continuously changed in the process of passengers getting on and off the elevator car, and when the process of passengers getting in and out of the elevator car is finished, the acting force of the passengers on the bottom plate of the elevator car approaches to a fixed value, so that whether the process of passengers getting in and out of the elevator car is finished or not is judged. Ideally, when the passenger is standing still, the acting force of the passenger on the car bottom is equal to the self gravity. The acting force of passengers on the car bottom fluctuates in a certain small range due to uncertain factors such as body shaking or leg shaking. In the process of getting in and out of the car by passengers in the elevator, the gravity in the car or the acting force of the passengers in the car on the bottom plate of the car, which is detected by the weighing device, fluctuates continuously, but no matter how the value in the detection process changes, the gravity detected by the weighing device tends to be a fixed value finally.
In the elevator car door-closing control apparatus according to the first embodiment, the control circuit sets the iteration count value S to zero, and performs the following processing on the weight sample data every time the control circuit receives the latest weight sample Ni + j: firstly, judging whether the time T after the door driving device drives the elevator car door to open exceeds the maximum door opening duration Tn, if so, executing door closing operation, if not, judging whether the count value S of an iteration counter reaches the preset iteration number q, if so, executing door closing operation, if not, updating the numerical values of N1, N2 and N3 … Ni in the previous execution program, wherein the updating mode is to clear N1 in the previous execution program, then enabling N1 to be N2, N2 to be N3, N3 to be N4 …, and the like, wherein Ni-1 is Ni, and Ni is Ni + j; after updating the data, the maximum value Nmax and the minimum value Nmin of N1, N2 and N3 … Ni are taken. Then judging whether Nmax-Nmin is larger than M or not, if so, enabling passengers to enter and exit the elevator car, resetting the iteration count value S, keeping the elevator car door open, and if not, adding 1 to the iteration count value S to perform next iteration judgment; and when the number of iterations q (namely the judgment is continuously performed q times, and S is q), the Nmax-Nmin < M is met, the process that the passenger enters and exits the car is considered to be finished, and the door closing operation is started at the moment.
In the elevator car door closing control apparatus according to the first embodiment, the control circuit processes i weight sampling data collected most recently. If the difference between the maximum value and the minimum value in the i weight sampling data is less than a certain fixed value M and the difference between the maximum value and the minimum value in the continuous judging section q times is less than the certain fixed value M, the passenger is judged to have finished entering or exiting the lift car, further controlling the door driving device to work in time to drive the elevator car door to close, accurately judging whether the passenger finishes entering and exiting the elevator car according to the fluctuation of the acting force of the passenger on the elevator car bottom plate in the elevator car obtained by actual measurement, automatically adjusting the time of closing the elevator door each time, when the flow of people is large, the proper extension of the door closing time also eliminates the unnecessary operation that the door is closed and then opened when the passengers get on or off the elevator, and when the flow of people is small, the system also properly shortens the door closing time, these all shorten and take advantage of the ladder latency, have both increased the passenger and taken advantage of the ladder good sensitivity while having prolonged the life of switch door button again, have promoted the operating efficiency of elevator.
Example two
Based on the first embodiment, the door closing control device for the elevator car comprises two weighing devices 1;
the two weighing devices are arranged under opposite corners of the elevator car floor 6.
EXAMPLE III
According to the first embodiment, as shown in fig. 1, the elevator car door closing control device includes four weighing devices 1 disposed under four corners of an elevator car floor 6.
Example four
Based on the elevator car door closing control device of the first embodiment, the weighing device 1 comprises a differential transformer and a signal conversion circuit;
the differential transformer is used for outputting an alternating current analog voltage signal according to the received pressure;
the signal conversion circuit is used for converting the alternating current voltage signal output by the differential transformer into a direct current analog voltage signal and outputting the direct current analog voltage signal.
Preferably, as shown in fig. 2, the differential transformer includes a primary winding 11, two secondary windings 12 and an iron core 10;
the signal conversion circuit also supplies power to the primary side coil 11;
the voltage difference between the output terminals of the two secondary side coils 12 is used as an alternating current analog voltage signal output by the differential transformer;
when the core 10 is at the center position, the mutual inductance of the two secondary side coils 12 is the same, and the voltage difference between the output terminals of the two secondary side coils 12 is zero (i.e. the output voltage of the differential transformer is zero);
when the pressure applied to the core 10 displaces the core 10 up and down, the voltage difference U3-U4 generated between the output terminals of the two secondary side coils 12 is positive or negative, and the differential transformer outputs a corresponding voltage difference.
EXAMPLE five
Based on the door closing control device of the elevator car of the fourth embodiment, as shown in fig. 3, the weighing device is fixed on a side plate of the car through a support frame 8;
the iron core 10 is connected with a connecting rod 13;
the connecting rod 13 penetrates through the upper side plate 81;
a return spring 14 is arranged between the connecting rod 13 and the upper side plate 81 of the support frame 8;
when the connecting rod 13 is pressed down, the iron core 10 moves downwards, the differential transformer outputs corresponding alternating current analog voltage signals, and meanwhile, the return spring 14 is also compressed correspondingly;
when the pressure applied to the connecting rod 13 disappears, the return spring 14 rebounds, so that the connecting rod drives the iron core 10 to restore to the central position, and at the moment, the differential transformer outputs an alternating current analog voltage signal with zero voltage.
EXAMPLE six
Based on the door closing control device of the elevator car of the fifth embodiment, as shown in fig. 4, the upper spring plate of the horseshoe spring mounting member 7 is fixedly mounted below the car floor 6;
the upper side plate 81 of the support frame 8 is fixedly arranged below the lower spring plate of the horseshoe-shaped spring mounting piece 7;
the connecting rod 13 passes through the upper side plate 81 of the support frame 8 and the lower spring plate of the horseshoe-shaped spring mounting piece 7;
the upper end of the connecting rod 13 is abutted against the lower side surface of the upper spring plate of the horseshoe-shaped spring mounting piece 7;
when the load in the car changes, the car bottom plate sinks to make the U-shaped spring mounting part 7 generate corresponding deformation, the connecting rod of the differential transformer is pressed down to drive the iron core to generate corresponding up-down direction displacement, and the weighing device can obtain the weight information of passengers in the car by detecting the change of the displacement.
The elevator car door-closing control device of the sixth embodiment can accurately detect the load change in the car, has simple structure and low cost, can be used for accurately judging whether passengers finish getting in or out of the car, automatically adjusting the time of closing the door of the elevator at each time, shortening the waiting time for taking the elevator, prolonging the service life of the door opening and closing button while increasing the elevator taking quality of the passengers, and improving the operation efficiency of the elevator.
EXAMPLE seven
Based on the elevator door closing time control device of the first embodiment, the signal conversion circuit is arranged in the car top station 5, and can also be independently arranged at other positions;
the control circuit is arranged in the control cabinet 3, and can also be independently arranged at other positions;
the control circuit is connected with the signal conversion circuit through a traveling cable 4 of the elevator.
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 (10)
1. The door closing control device for the elevator car is characterized by comprising a sampling circuit, a control circuit, a door driving device and at least two weighing devices;
the weighing devices are uniformly arranged below a bottom plate of the elevator car and used for detecting the weight in the elevator car and outputting weight analog signals;
the sampling circuit is used for sampling the weight analog signal and outputting a weight sampling digital signal to the control circuit;
the control circuit controls the door driving device to work according to the weight sampling digital signal to drive the elevator car door to close;
the control circuit comprises an iteration counter, a sampling counter and a timer, and the working process of the control circuit is as follows:
at the set time of the process that the door driving device drives the elevator car door to open, the counting value S of the iterative counter is made to be 0, the counting value j of the sampling counter is made to be 1, the timing value T of the timer is made to be 0 and starts to time, and the weight sampling digital signal is started to be received;
receiving first to ith weight samples N1, N2, N3, … … and Ni, i being an integer greater than 1;
receiving an i + j th weight sample Ni + j;
if T is less than Tn and Tn is the maximum door opening time, performing the fifth step; otherwise, carrying out the step eight;
if S is less than q, and q is a positive integer, then carrying out the sixth step; otherwise, carrying out the step eight;
ni-1 ═ Ni was performed for N1, N2, N3, … …, and Ni-1; ni is Ni ═ Ni + j;
if Nmax-Nmin is less than M and M is the set maximum fluctuation value, S is equal to S +1, j is equal to j +1, and then step three is carried out; otherwise, S is 0, j is j +1, and then step three is carried out;
nmax is the maximum of N1, N2, N3, … … and Ni;
nmin is the minimum of N1, N2, N3, … … and Ni;
and eighthly, controlling the door driving device to work, driving the elevator car door to close, and ending.
2. The elevator car door-closing control apparatus according to claim 1,
the set time for driving the opening process of the elevator car door by the door driving device is the time when the opening process of the elevator car door is started, opened or before the opening process is finished.
3. The elevator car door-closing control apparatus according to claim 1,
q is 2 to 10;
tn is 4 seconds to 6 seconds.
The sampling period t is 0.01 to 0.02 seconds, and i is 5 to 20.
4. The elevator car door-closing control apparatus according to claim 1,
the elevator car door closing control device comprises two weighing devices;
the two weighing devices are arranged under two opposite corners of the floor of the elevator car.
5. The elevator car door-closing control apparatus according to claim 1,
the elevator car door closing control device comprises four weighing devices which are arranged below four corners of a bottom plate of the elevator car.
6. The elevator car door-closing control apparatus according to claim 1,
the weighing device comprises a differential transformer and a signal conversion circuit;
the differential transformer is used for outputting an alternating current analog voltage signal according to the received pressure;
the signal conversion circuit is used for converting the alternating current voltage signal output by the differential transformer into a direct current analog voltage signal and outputting the direct current analog voltage signal.
7. The elevator car door-closing control apparatus according to claim 6,
the differential transformer comprises a primary side coil, two secondary side coils and an iron core;
the signal conversion circuit also supplies power to the primary side coil;
the voltage difference between the output terminals of the two secondary side coils is used as an alternating current analog voltage signal output by the differential transformer;
when the iron core is in the central position, the mutual inductance of the two secondary side coils is the same, and the voltage difference between the output terminals of the two secondary side coils is zero at the moment;
when the pressure applied to the iron core makes the iron core displace up and down, the voltage difference generated between the output terminals of the two secondary side coils is a positive value or a negative value.
8. The elevator car door-closing control apparatus according to claim 7,
the weighing device is fixed on a side plate of the car through a support frame;
the iron core is connected with a connecting rod;
the connecting rod penetrates through the upper side plate;
a return spring is arranged between the connecting rod and the upper side plate of the support frame;
when the connecting rod is pressed down, the iron core moves downwards, the differential transformer outputs corresponding alternating current analog voltage signals, and meanwhile, the return spring is also correspondingly compressed;
when the pressure applied to the connecting rod disappears, the return spring rebounds to enable the connecting rod to drive the iron core to recover to the central position, and at the moment, the differential transformer outputs an alternating current analog voltage signal with zero voltage.
9. The elevator car door-closing control apparatus according to claim 8,
the spring plate on the U-shaped spring mounting piece is fixedly mounted below the car bottom plate;
the upper side plate of the support frame is fixedly arranged below the lower spring plate of the horseshoe-shaped spring mounting piece;
the connecting rod penetrates through an upper side plate of the support frame and a lower spring plate of the horseshoe-shaped spring mounting piece;
the upper end of the connecting rod is abutted against the lower side surface of the upper spring plate of the horseshoe-shaped spring mounting piece;
when the load in the car changes, the bottom plate of the car sinks to enable the U-shaped spring mounting piece to generate corresponding deformation, and the connecting rod of the differential transformer is pressed down to drive the iron core to generate corresponding up-down displacement.
10. The elevator car door-closing control apparatus according to claim 8,
the signal conversion circuit is arranged in the car top station;
the control circuit is arranged in the control cabinet;
the control circuit is connected with the signal conversion circuit through a traveling cable of the elevator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811618928.0A CN111377341A (en) | 2018-12-28 | 2018-12-28 | Elevator car door closing control device |
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| CN201811618928.0A CN111377341A (en) | 2018-12-28 | 2018-12-28 | Elevator car door closing control device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112125110A (en) * | 2020-09-18 | 2020-12-25 | 广州广日电梯工业有限公司 | Intelligent door closing control method and system for elevator and elevator |
| CN115180470A (en) * | 2022-06-16 | 2022-10-14 | 安徽领电智能科技有限公司 | Building elevator management and control system based on self-learning |
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2018
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112125110A (en) * | 2020-09-18 | 2020-12-25 | 广州广日电梯工业有限公司 | Intelligent door closing control method and system for elevator and elevator |
| CN115180470A (en) * | 2022-06-16 | 2022-10-14 | 安徽领电智能科技有限公司 | Building elevator management and control system based on self-learning |
| CN115180470B (en) * | 2022-06-16 | 2024-05-07 | 安徽领电智能科技有限公司 | Building elevator management and control system based on self-learning |
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