CN112299174B - Elevator car access & exit monitoring system - Google Patents
Elevator car access & exit monitoring system Download PDFInfo
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- CN112299174B CN112299174B CN201910686573.7A CN201910686573A CN112299174B CN 112299174 B CN112299174 B CN 112299174B CN 201910686573 A CN201910686573 A CN 201910686573A CN 112299174 B CN112299174 B CN 112299174B
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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
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Abstract
The invention discloses an elevator car entrance and exit monitoring system, which comprises a door area protection device and a door system controller, wherein the door area protection device comprises a door area protection device body and a door system controller; the door system controller detects the state of the car door through external detection equipment; the door system controller sends the state of the car door to the door zone protection device through the door state information interface; the car door state comprises a fully closed state, a fully open state and a middle state; the door area protection device is provided with a TOF sensor; the TOF sensor obtains a car door opening detection signal according to the light ray transmitting and reflecting time difference or phase difference; the door zone protection device determines a seam reference line between the car door and the car wall according to a car door opening detection signal when the car door is in a fully opened state; the door zone protection device sends a door zone state to the door controller through a door zone state signal interface; the door zone state includes whether the object is less than a set distance from the crack reference line. The elevator car entrance and exit monitoring system can improve the accuracy of the seam reference line between the car door and the car wall.
Description
Technical Field
The invention relates to an elevator safety detection technology, in particular to an elevator car entrance and exit monitoring system.
Background
In the relevant national standards of elevators, it is clearly specified that an elevator system must be provided with an entrance protection device, and at present, an elevator door light curtain is generally adopted to protect passengers entering and exiting an elevator car, and the function of the entrance protection device is mainly to detect whether people or objects enter or exit the elevator car door so as to prevent the passengers from being hit by the elevator car door in the closing process.
The ordinary light curtain can only protect the side area of the car, can not protect the risk caused by the insertion of foreign matters close to the position of the landing sill, and can not predict people or objects with the door entering tendency. If fingers are prevented from entering the gap between the car door and the front wall, a separate infrared detector is required. Monitoring of children's pets also requires a separate camera device. Many of the above monitoring often need a plurality of monitors to accomplish, and thus the communication interface also has various different interfaces to communicate with the door machine printing plate, and it is difficult to accomplish all communications with only 1 communication port.
The door protection device is used for making the detected condition into a data packet firstly and communicating from the network port, but the communication speed is slow, so that the elevator door cannot be protected in time.
The existing integrated door protection device adopts TOF technology. TOF is an abbreviation of Time of Flight (TOF) technology, i.e. a TOF sensor emits modulated infrared light, which is reflected after encountering an object, and the TOF sensor converts the distance of a shot scene by calculating the Time difference or phase difference between light emission and reflection to generate depth information. The integral type door protection device adopts TOF technique's a big shortcoming is, when the door is the car door is glass door, the infrared light that TOF sensor sent can pierce through glass door, detection precision can very big degree reduce, especially when the car door is closed, the infrared light pierces through the glass face, the unable TOF sensor that returns of light that pierces through, TOF sensor just can't calculate flight return time, can think by mistake the car door this moment is the open mode, if door system controller is unable to know TOF sensor car door and has closed, TOF sensor can be when the car door is closed still constantly detect the motion trend of the object outside the car, the object motion outside the car is detected the back, caused the anti-opening door on the contrary, finally cause the elevator never to close the car door. And the TOF sensor is also difficult to accurately position the true width of the access opening facing the glass door, and is difficult to accurately position the crack datum line between the car door and the door-closing side face of the front wall of the car in the opening process of the car door.
Disclosure of Invention
The invention aims to provide an elevator car entrance and exit monitoring system which can improve the accuracy of a seam reference line between a car door and a car wall and can avoid the car door from being opened reversely due to infrared penetration of a glass door.
In order to solve the technical problem, the elevator car entrance and exit monitoring system provided by the invention comprises a door area protection device 1 and a door system controller 2;
the door system controller 2 detects the state of the car door through an external detection device;
the door system controller 2 sends the state of the car door to the door zone protection device 1 through a door state information interface 3;
the car door states comprise a fully closed state, a fully open state and an intermediate state;
the door area protection device 1 is provided with a TOF sensor; (ii) a
The TOF sensor is used for obtaining a car door opening detection signal according to the light ray transmitting and reflecting time difference or the phase difference;
the door zone protection device 1 determines a seam reference line between the car door and the car wall, namely a vertical intersection line of a closing side wall and a front side wall of the car door according to a car door opening detection signal sent by the door system controller 2 when the car door state is a fully opened state;
the door area protection device 1 sends a door area state to the door system controller 2 through a door area state signal interface 4;
the door zone state comprises whether the distance between the object and the crack datum line is smaller than a set distance.
Preferably, the door system controller 2 supplies power to the door zone protection device 1 through the power source positive electrode interface 5 and the power source negative electrode interface 6.
Preferably, the external detection device comprises a car door full-closing in-place detection switch and a car door full-opening in-place detection switch.
Preferably, the set distance is 20 mm.
Preferably, the door state information interface 3 uses a conductive wire to transmit the state of the car door, and three different levels on the conductive wire represent a fully closed state, a fully open state and an intermediate state, respectively.
Preferably, when the car door state is the fully closed state, the door system controller 2 keeps the conductive wire of the door state information interface 3 at a low level;
when the state of the car door is in a full-open state, the door system controller 2 enables the conductive wire of the door state information interface 3 to be continuously in a high level;
when the car door state is in the intermediate state, the door system controller 2 sets the conductive line of the door state information interface 3 to the intermittent high level.
Preferably, the high duration of the intermittent high on the conductive line of the gate state information interface 3 is 50 to 150ms, and the intermittent time is 50 to 150 ms.
Preferably, the door zone state further comprises whether a foreign matter is shielded at an entrance and an exit of the elevator car, whether people or objects outside a hall have a tendency to enter an elevator car door, whether people or objects having the tendency to enter the elevator car door exceed a set height, whether people or objects lean against the car door, whether a main relay is in a disconnection fault, and whether a main relay is in an adhesion fault;
the gate area state signal interface 4 adopts a conductive wire to transmit the state of the gate area, and different level states on the conductive wire represent different gate area states.
Preferably, when the door zone protection device 1 has a main relay open fault, the door zone protection device 1 makes the conductive wire be at a continuous low level;
when the door area protection device 1 has a main relay adhesion fault, the door area protection device enables the conductive wire to be in a continuous high level;
when the car door state is the fully closed state, when the object is more than the set distance from the crack datum line and no person or object leans against the car door, the door zone protection device 1 enables the conductive wire to be at a first type intermittent high level; when the distance between an object and a crack reference line is less than or equal to a set distance or a person or an object leans against a car door, the door zone protection device 1 enables the conductive wire to be at a second type intermittent high level;
when the state of the car door is in the middle state, when foreign matters are shielded at the entrance and the exit of the elevator car, people or objects outside the hall do not tend to enter the elevator car door, the distance between the objects and the crack datum line is greater than a set distance, and no people or objects lean against the car door, the door zone protection device 1 enables the conductive wire to be in a continuous low level; when the elevator car entrance and exit are not shielded by foreign objects, people or objects outside the hall do not tend to enter the elevator door, and the distance between the objects and the crack datum line is greater than a set distance, the door area protection device 1 enables the conductive wire to be a first-class intermittent high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or the objects is above the set height, the distance between the objects and the crack reference line is greater than the set distance, or no people or objects lean against the car door, the door zone protection device 1 enables the conductive wire to be at a third type intermittent high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or the objects is below the set height, the distance between the objects and the crack reference line is greater than the set distance, or no people or objects lean against the car door, the door zone protection device 1 enables the conductive wire to be at a fourth type intermittent high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or objects is above a set height, the distance between the objects and the crack datum line is less than or equal to the set distance, or people or objects lean against the car door, the door zone protection device 1 enables the conductive wire to be at a fifth type intermittent high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or objects is below a set height, the distance between the objects and the crack datum line is less than or equal to the set distance, or people or objects lean against the car door, the door zone protection device enables the conductive wire to be in a sixth type intermittent high level; when the foreign matter is shielded at the entrance and exit of the elevator car, no person or object outside the hall tends to enter the elevator door, and the distance between the object and the crack datum line is smaller than or equal to a set distance or the person or object leans against the car door, the door zone protection device 1 enables the conductive wire to be a seventh type intermittent high level.
Preferably, the door zone state further comprises whether a foreign matter is shielded at an entrance and an exit of the elevator car, whether people or objects outside a hall have a tendency to enter an elevator car door, whether people or objects having the tendency to enter the elevator car door exceed a set height, whether people or objects lean against the car door, whether a main relay is in a disconnection fault, and whether a main relay is in an adhesion fault;
the gate area state signal interface 4 adopts 2 conductive wires to transmit the states of the gate area, and different level states on the 2 conductive wires represent different gate area states;
the door zone protection device 1 sends the door zone status to the door system controller 2 by making the first wire continuously low or continuously high and making the second wire continuously low, continuously high or intermittently high.
Preferably, when the door zone protection device 1 has a main relay open fault, the door zone protection device 1 makes the first conductive wire be at a continuous low level, and makes the second conductive wire be at a continuous low level;
when the door zone protection device 1 has a main relay adhesion fault, the door zone protection device 1 enables a first conductive wire to be at a continuous low level and a second conductive wire to be at a continuous high level;
when the car door state is a fully closed state and the door zone protection device has no main relay disconnection fault and main relay adhesion fault, when an object is more than a set distance from a crack reference line and no person or object depends on the car door, the door zone protection device 1 enables a first wire to be a continuous high level and a second wire to be a first type intermittent high level;
when the state of the car door is in an intermediate state, and the door zone protection device has no main relay disconnection fault and main relay adhesion fault, when the entrance and exit of the elevator car are not shielded by foreign objects, people or objects outside a hall have no tendency to enter the elevator door, the distance between the objects and a crack datum line is greater than a set distance, and no people or objects depend on the car door, the door zone protection device enables a first wire to be in a continuous high level and a second wire to be in a first type of intermittent high level; when the distance between the object and the crack reference line is less than or equal to the set distance or a person or an object depends on the car door, the door zone protection device enables the first wire to be at a continuous high level and the second wire to be at a continuous low level; when the foreign matter is shielded at the entrance and exit of the elevator car, people or objects outside the hall do not have the tendency of entering the elevator door, the distance between the objects and the crack datum line is greater than the set distance, and no people or objects depend on the car door, the door zone protection device enables the first wire to be in a continuous low level and the second wire to be in a continuous high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or objects tending to enter the elevator car door is higher than a set height, the distance between the objects and the crack datum line is greater than a set distance, and no people or objects depend on the car door, the door zone protection device enables a first wire to be at a continuous low level and a second wire to be at a first type of intermittent high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or objects tending to enter the elevator car door is below a set height, the distance between the objects and the crack datum line is greater than a set distance, and no people or objects depend on the car door, the door zone protection device enables a first wire to be at a continuous low level and a second wire to be at a second type of intermittent high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or objects tending to enter the elevator car door is above a set height, and the distance between the objects and the crack datum line is less than or equal to the set distance or people or objects depend on the car door, the door zone protection device enables the first wire to be at a continuous low level and the second wire to be at a third type intermittent high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or objects tending to enter the elevator car door is below a set height, and the objects are less than or equal to a set distance from the crack datum line or the people or objects depend on the car door, the door zone protection device enables the first wire to be at a continuous low level and the second wire to be at a fourth type intermittent high level.
Preferably, the gate area protection device 1 outputs the voltage level to the conductive line of the gate area status signal interface 4 in a push-pull manner.
Preferably, the frequencies of different types of intermittent high levels on the conductive line of the gate region status signal interface 4 are the same, but the duty ratios are different.
The various intermittent high levels have the same frequency but different duty cycles.
Preferably, the frequencies of different types of intermittent high levels on the conductive lines of the gate region status signal interface 4 are different.
Preferably, the set height is 1.2 m.
The elevator car entrance and exit monitoring system determines the car door and car wall crack reference line according to the car door width detection signal of the TOF sensor when the car door state is the fully-opened state, but not according to the car door width detection signal when the width detected by the TOF sensor is the maximum, so that the precision interference caused by special car door materials (such as glass doors) is avoided, and the precision of the car door and car wall crack reference line is improved.
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 an elevator car doorway monitoring system according to the present invention.
Description of the reference numerals
1 door zone protection devices; 2 door system controller; 3 door state information interface; 4 door zone status signal interface; 5, a power supply positive electrode interface; 6 power supply negative electrode interface.
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, the elevator car doorway monitoring system includes a door zone protecting device 1, a door system controller 2;
the door system controller 2 detects the state of the car door through an external detection device;
the door system controller 2 sends the state of the car door to the door zone protection device 1 through a door state information interface 3;
the car door states comprise a fully closed state, a fully open state and an intermediate state;
the door area protection device 1 is provided with a TOF sensor; (ii) a
The TOF sensor is used for obtaining a car door opening detection signal according to the light ray transmitting and reflecting time difference or the phase difference;
the door zone protection device 1 determines a seam reference line between the car door and the car wall, namely a vertical intersection line of a closing side wall and a front side wall of the car door according to a car door opening detection signal sent by the door system controller 2 when the car door state is a fully opened state;
the door area protection device 1 sends a door area state to the door system controller 2 through a door area state signal interface 4;
the door zone state comprises whether the distance between the object and the crack datum line is smaller than a set distance.
According to the elevator car doorway monitoring system of the first embodiment, the car door and car wall crack reference line is determined according to the car door width detection signal of the TOF sensor when the car door state is the fully open state, instead of determining the car door and car wall crack reference line according to the car door width detection signal of the TOF sensor when the width is the maximum, so that precision interference caused by special car door materials (such as glass doors) is avoided, and the precision of the car door and car wall crack reference line is improved.
Example two
Based on the elevator car access monitoring system of the first embodiment, the door system controller 2 supplies power to the door zone protection device 1 through the power source positive electrode interface 5 and the power source negative electrode interface 6.
Preferably, the external detection equipment comprises a car door full-closing in-place detection switch and a car door full-opening in-place detection switch;
the car door full-closed in-place detection switch is used for detecting whether the car door is in a full-closed state;
the car door full-open in-place detection switch is used for detecting whether the car door is in a full-open state.
Preferably, the set distance is 20 mm.
EXAMPLE III
Based on the elevator car doorway monitoring system according to the first embodiment, the door state information interface 3 uses one conductive wire to transmit the car door state, and three different level states on the conductive wire respectively represent a fully closed state, a fully open state, and an intermediate state.
Preferably, when the car door state is the fully closed state, the door system controller 2 keeps the conductive line of the door state information interface 3 at a low level (0V);
when the car door state is the full-open state, the door system controller 2 makes the conductive wire of the door state information interface 3 continuously at a high level (12V);
when the state of the car door is in the middle state, the door system controller 2 enables the electric lead of the door state information interface 3 to be in an intermittent high level;
preferably, the high duration of the intermittent high on the conductive line of the gate state information interface 3 is 50 to 150ms, and the intermittent time is 50 to 150 ms.
The elevator car doorway monitoring system of the third embodiment transmits the car door state through the level state on the conductive wire, and the communication speed is high.
Example four
Based on the elevator car doorway monitoring system of the first embodiment, the door zone state further includes whether the elevator car doorway has a foreign object shield, whether people or objects outside the hall have a tendency to enter the elevator car door, whether people or objects having a tendency to enter the elevator car door exceed a set height, whether people or objects lean against the car door, whether a main relay is disconnected, and whether a main relay is adhered;
the gate area state signal interface 4 adopts a conductive wire to transmit the state of the gate area, and different level states on the conductive wire represent different gate area states.
Preferably, when the door zone protection device 1 has a main relay open fault, the door zone protection device 1 makes the conductive wire be at a continuous low level;
when the door area protection device 1 has a main relay adhesion fault, the door area protection device enables the conductive wire to be in a continuous high level;
when the car door state is the fully closed state, when the object is more than the set distance from the crack datum line and no person or object leans against the car door, the door zone protection device 1 enables the conductive wire to be at a first type intermittent high level; when an object is less than or equal to a set distance from a crack datum line or a person or an object leans against a car door, the door zone protection device 1 enables the conductive wire to be at a second type of intermittent high level, at the moment, the door zone protection device can shield whether foreign objects exist at an exit of the car outside the car door or not, and whether the tendency that the person or the object outside a hall enters the car door of the elevator or not is not detected;
when the state of the car door is in the middle state, when foreign matters are shielded at the entrance and the exit of the elevator car, people or objects outside the hall do not tend to enter the elevator car door, the distance between the objects and the crack datum line is greater than a set distance, and no people or objects lean against the car door, the door zone protection device 1 enables the conductive wire to be in a continuous low level; when the elevator car entrance and exit are not shielded by foreign objects, people or objects outside the hall do not tend to enter the elevator door, and the distance between the objects and the crack datum line is greater than a set distance, the door area protection device 1 enables the conductive wire to be a first-class intermittent high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or the objects is above the set height, the distance between the objects and the crack reference line is greater than the set distance, or no people or objects lean against the car door, the door zone protection device 1 enables the conductive wire to be at a third type intermittent high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or the objects is below the set height, the distance between the objects and the crack reference line is greater than the set distance, or no people or objects lean against the car door, the door zone protection device 1 enables the conductive wire to be at a fourth type intermittent high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or objects is above a set height, the distance between the objects and the crack datum line is less than or equal to the set distance, or people or objects lean against the car door, the door zone protection device 1 enables the conductive wire to be at a fifth type intermittent high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or objects is below a set height, the distance between the objects and the crack datum line is less than or equal to the set distance, or people or objects lean against the car door, the door zone protection device enables the conductive wire to be in a sixth type intermittent high level; when the foreign matter is shielded at the entrance and exit of the elevator car, no person or object outside the hall tends to enter the elevator door, and the distance between the object and the crack datum line is smaller than or equal to a set distance or the person or object leans against the car door, the door zone protection device 1 enables the conductive wire to be a seventh type intermittent high level.
Preferably, the gate area protection device 1 outputs the voltage level to the conductive line of the gate area status signal interface 4 in a push-pull manner.
Preferably, the frequencies of different types of intermittent high levels on the conductive line of the gate region status signal interface 4 are the same, but the duty ratios are different.
Preferably, the frequencies of different types of intermittent high levels on the conductive lines of the gate region status signal interface 4 are different.
Preferably, the set height is 1.2 m.
In the elevator car doorway monitoring system according to the fourth embodiment, the relationship between the processing mode of the door system controller 2 and the state of the car door and the level state on the conductive wire of the door zone state signal interface 4 is shown in table 1;
TABLE 1
When the door is opened and closed once, only the fourth type intermittent high level or only the sixth type intermittent high level occurs and the third type or fifth type intermittent high level does not occur, the door system controller judges that only children or pets enter the car, outputs a control command to control the car door to be fully opened until a door closing button in the car is pressed for a long time, and considers that a certain intelligence adult intervenes in the car, so that the children or pets are ensured to be cared by the adults and cannot be lost.
In the elevator car entrance and exit monitoring system according to the fourth embodiment, the door zone state signal interface 4 uses a conductive wire to transmit the door zone state, and different level states on the conductive wire represent different door zone states. The door zone protecting apparatus 1 detects only the distance of an object from the crack reference line and whether a person or an object leans against the car door when the car door state is the fully closed state.
EXAMPLE five
The door zone state based on the first embodiment further comprises whether a foreign matter is shielded at an entrance and an exit of the elevator car, whether people or objects outside a hall have a tendency to enter the elevator car door, whether people or objects having the tendency to enter the elevator car door exceed a set height, whether people or objects lean against the car door, whether a main relay is in an open fault, and whether a main relay is in an adhesion fault;
the gate area state signal interface 4 adopts 2 conductive wires to transmit the states of the gate area, and different level states on the 2 conductive wires represent different gate area states;
the door zone protection device 1 sends the door zone status to the door system controller 2 with the first wire at a sustained low level (0v) or a sustained high level (12v) and the second wire at a sustained low level (0v), a sustained high level (12v) or an intermittent high level.
Preferably, when the door zone protection device 1 has a main relay open fault, the door zone protection device 1 makes the first conductive wire be at a continuous low level, and makes the second conductive wire be at a continuous low level;
when the door zone protection device 1 has a main relay adhesion fault, the door zone protection device 1 enables a first conductive wire to be at a continuous low level and a second conductive wire to be at a continuous high level;
when the car door state is a fully closed state and the door zone protection device has no main relay disconnection fault and main relay adhesion fault, when an object is more than a set distance from a crack datum line and no person or object depends on the car door, the door zone protection device 1 enables a first wire to be a continuous high level and a second wire to be a first type of intermittent high level, at the moment, the door zone protection device can shield whether foreign matters exist at a car entrance outside the car door or not, and whether people or objects outside a hall enter the elevator car door or not is not detected;
when the state of a car door is in an intermediate state, and the door zone protection device has no disconnection fault of a main relay and adhesion fault of the main relay, when an entrance and an exit of an elevator car are not shielded by foreign objects, people or objects outside a hall have no tendency of entering the elevator door, the distance between the objects and a crack reference line is greater than a set distance, and no people or objects depend on the car door, the door zone protection device 1 enables a first wire to be in a continuous high level and a second wire to be in a first type of intermittent high level; when the entrance and exit of the elevator car are not shielded by foreign objects and people or objects outside the hall do not have the tendency of entering the elevator car door, when the distance between the object and the crack reference line is less than or equal to the set distance or people or objects depend on the car door, the door zone protection device 1 enables a first wire to be at a continuous high level and a second wire to be at a continuous low level; when the foreign matter is shielded at the entrance and exit of the elevator car, people or objects outside the hall do not have the tendency of entering the elevator door, the distance between the objects and the crack datum line is greater than the set distance, and no people or objects depend on the car door, the door zone protection device 1 enables a first wire to be in a continuous low level and a second wire to be in a continuous high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or objects tending to enter the elevator car door is above a set height, the distance between the objects and the crack datum line is greater than a set distance, and no people or objects depend on the car door, the door zone protection device 1 enables a first wire to be at a continuous low level and a second wire to be at a first type intermittent high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or objects tending to enter the elevator car door is below a set height, the distance between the objects and the crack datum line is greater than a set distance, and no people or objects depend on the car door, the door zone protection device 1 enables a first wire to be at a continuous low level and a second wire to be at a second type of intermittent high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or objects tending to enter the elevator car door is above a set height, and the distance between the objects and the crack datum line is less than or equal to the set distance or people or objects depend on the car door, the door zone protection device 1 enables a first wire to be at a continuous low level and a second wire to be at a third type intermittent high level; when a person or an object outside the hall tends to enter the elevator door, the height of the person or the object tending to enter the elevator car door is below a set height, and the object is less than or equal to a set distance from the crack reference line or the person or the object leans against the car door, the door zone protecting device 1 makes the first wire be at a continuous low level and the second wire be at a fourth type intermittent high level
Preferably, the gate area protection device 1 outputs the voltage level to the conductive line of the gate area status signal interface 4 in a push-pull manner.
Preferably, the frequencies of different types of intermittent high levels on the conductive line of the gate region status signal interface 4 are the same, but the duty ratios are different.
Preferably, the frequencies of different types of intermittent high levels on the conductive lines of the gate region status signal interface 4 are different.
Preferably, the set height is 1.2 m.
When the door is opened and closed once, when the first wire is in a continuous low level, the second wire has a second type or a fourth type intermittent high level but does not have a first type or a third type intermittent high level, the door system controller judges that only children or pets enter the car, and outputs a control instruction to control the car door to be fully opened until a door closing button in the car is pressed for a long time, and a certain intelligence and adult is considered to intervene in the car, so that the children or pets are ensured to have adult care and cannot be lost.
In the elevator car entrance and exit monitoring system according to the fifth embodiment, the door zone state signal interface transmits the door zone state by using 2 conductive wires, and different level states on the 2 conductive wires represent different door zone states.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (17)
1. An elevator car access monitoring system is characterized by comprising a door area protection device (1) and a door system controller (2);
the door system controller (2) detects the state of the car door through an external detection device;
the door system controller (2) sends the state of the car door to the door zone protection device (1) through a door state information interface (3);
the car door states comprise a fully closed state, a fully open state and an intermediate state;
the door area protection device (1) is provided with a TOF sensor;
the TOF sensor is used for obtaining a car door opening detection signal according to the light ray transmitting and reflecting time difference or the phase difference;
the door zone protection device (1) determines a seam reference line between the car door and the car wall, namely a vertical intersection line of a door closing side wall and a front side wall of the car door according to a car door opening detection signal sent by the door system controller (2) when the car door state is a fully opened state;
the door zone protection device (1) sends a door zone state to the door system controller (2) through a door zone state signal interface (4);
the door zone state comprises whether the distance between the object and the crack datum line is smaller than a set distance.
2. The elevator car doorway monitoring system of claim 1,
the door system controller (2) supplies power to the door area protection device (1) through a power supply positive electrode interface (5) and a power supply negative electrode interface (6).
3. The elevator car doorway monitoring system of claim 1,
the external detection equipment comprises a car door full-closing in-place detection switch and a car door full-opening in-place detection switch.
4. The elevator car doorway monitoring system of claim 1,
the set distance is 20 mm.
5. The elevator car doorway monitoring system of claim 1,
the door state information interface (3) adopts a conductive wire to transmit the state of the car door, and three different level states on the conductive wire respectively represent a fully closed state, a fully open state and an intermediate state.
6. The elevator car doorway monitoring system of claim 5,
when the state of the car door is in a fully closed state, the door system controller (2) enables the electric lead of the door state information interface (3) to be in a low level continuously;
when the state of the car door is in a full-open state, the door system controller (2) enables the electric lead of the door state information interface (3) to be in a high level continuously;
when the state of the car door is in the middle state, the door system controller (2) enables the electric lead of the door state information interface (3) to be in an intermittent high level.
7. The elevator car doorway monitoring system of claim 6,
the high level duration of the intermittent high level on the conductive wire of the gate state information interface (3) is 50 to 150ms, and the intermittent time is 50 to 150 ms.
8. The elevator car doorway monitoring system of claim 1,
the door zone state also comprises whether a foreign matter is shielded at an entrance and an exit of the elevator car, whether people or objects outside a hall have the tendency of entering the elevator car door, whether people or objects having the tendency of entering the elevator car door exceed a set height, whether people or objects lean against the car door, whether a main relay is in a disconnection fault, and whether a main relay is in an adhesion fault;
the gate area state signal interface (4) adopts a conductive wire to transmit the state of the gate area, and different level states on the conductive wire represent different gate area states.
9. The elevator car doorway monitoring system of claim 8,
when the door area protection device (1) has a main relay disconnection fault, the door area protection device (1) enables the conductive wire to be in a continuous low level;
when the door area protection device (1) has the main relay adhesion fault, the door area protection device enables the conductive wire to be in a continuous high level;
when the car door state is a fully closed state, when an object is more than a set distance away from a crack reference line and no person or object leans against the car door, the door zone protection device (1) enables the conductive wire to be at a first type intermittent high level; when the distance between an object and a crack reference line is less than or equal to a set distance or a person or an object leans against a car door, the door zone protection device (1) enables the conductive wire to be at a second type of intermittent high level;
when the state of the car door is in a middle state, when foreign matters are shielded at an entrance and an exit of the elevator car, people or objects outside a hall do not tend to enter the elevator car door, the distance between the objects and a crack datum line is greater than a set distance, and no people or objects lean against the car door, the conductive wire is in a continuous low level by the door zone protection device (1); when the elevator car entrance and exit are not shielded by foreign objects, people or objects outside the hall do not tend to enter the elevator door, and the distance between the objects and the crack datum line is greater than a set distance, the door area protection device (1) enables the conductive wire to be a first-class intermittent high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or the objects is above a set height, the distance between the objects and the crack reference line is greater than a set distance, or no people or objects lean against the car door, the door zone protection device (1) enables the conductive wire to be at a third type intermittent high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or the objects is below a set height, the distance between the objects and the crack reference line is greater than a set distance, or no people or objects lean against the car door, the door zone protecting device (1) enables the conductive wire to be at a fourth type intermittent high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or objects is above a set height, the distance between the objects and the crack datum line is less than or equal to the set distance, or people or objects lean against the car door, the door zone protection device (1) enables the conductive wire to be at a fifth type intermittent high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or objects is below a set height, the distance between the objects and the crack datum line is less than or equal to the set distance, or people or objects lean against the car door, the door zone protection device enables the conductive wire to be in a sixth type intermittent high level; when foreign matters are shielded at the entrance and exit of the elevator car, no person or object outside the hall tends to enter the elevator door, and the distance between the object and the crack datum line is smaller than or equal to a set distance or the person or object leans against the car door, the door zone protection device (1) enables the conductive wire to be a seventh type intermittent high level.
10. The elevator car doorway monitoring system of claim 9, wherein,
when the door is opened and closed once, only the fourth type of intermittent high level or only the sixth type of intermittent high level appears, the door system controller judges that only children or pets enter the car, and outputs a control instruction to control the car door to be kept fully opened until a door closing button in the car is pressed for a long time.
11. The elevator car doorway monitoring system of claim 1,
the door zone state also comprises whether a foreign matter is shielded at an entrance and an exit of the elevator car, whether people or objects outside a hall have the tendency of entering the elevator car door, whether people or objects having the tendency of entering the elevator car door exceed a set height, whether people or objects lean against the car door, whether a main relay is in a disconnection fault, and whether a main relay is in an adhesion fault;
the gate area state signal interface (4) adopts 2 conductive wires to transmit the states of the gate area, and different level states on the 2 conductive wires represent different gate area states;
the door zone protection device (1) sends the door zone status to the door system controller (2) by making the first wire continuously low or continuously high and making the second wire continuously low, continuously high or intermittently high.
12. The elevator car doorway monitoring system of claim 11,
when a main relay disconnection fault occurs in the door area protection device (1), the door area protection device (1) enables a first conductive wire to be at a continuous low level and enables a second conductive wire to be at a continuous low level;
when the door zone protection device (1) has a main relay adhesion fault, the door zone protection device (1) enables a first conductive wire to be at a continuous low level and a second conductive wire to be at a continuous high level;
when the car door state is a fully closed state and the door zone protection device has no main relay disconnection fault and main relay adhesion fault, when an object is more than a set distance from a crack reference line and no person or object depends on the car door, the door zone protection device (1) enables a first wire to be a continuous high level and a second wire to be a first type intermittent high level;
when the state of a car door is in an intermediate state and the door zone protection device has no main relay disconnection fault and main relay adhesion fault, when an entrance and an exit of an elevator car are not shielded by foreign objects, people or objects outside a hall have no tendency to enter the elevator door, the distance between the objects and a crack reference line is greater than a set distance, and no people or objects depend on the car door, the door zone protection device (1) enables a first wire to be in a continuous high level and a second wire to be in a first type of intermittent high level; when the distance between an object and a crack reference line is smaller than or equal to a set distance or a person or an object depends on a car door, the door zone protection device (1) enables a first wire to be at a continuous high level and a second wire to be at a continuous low level; when foreign matters are shielded at the entrance and exit of the elevator car, people or objects outside a hall do not have the tendency of entering the elevator door, the distance between the objects and a crack datum line is greater than a set distance, and no people or objects depend on the car door, the door zone protection device (1) enables a first wire to be in a continuous low level and a second wire to be in a continuous high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or objects tending to enter the elevator car door is above a set height, the distance between the objects and the crack datum line is greater than a set distance, and no people or objects depend on the car door, the door zone protection device (1) enables a first wire to be at a continuous low level and a second wire to be at a first type of intermittent high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or objects tending to enter the elevator car door is below a set height, the distance between the objects and the crack datum line is greater than a set distance, and no people or objects depend on the car door, the door zone protection device (1) enables a first wire to be at a continuous low level and a second wire to be at a second type of intermittent high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or objects tending to enter the elevator car door is above a set height, and the distance between the objects and the crack reference line is less than or equal to the set distance or people or objects depend on the car door, the door zone protection device (1) enables a first wire to be at a continuous low level and a second wire to be at a third type of intermittent high level; when people or objects outside the hall tend to enter the elevator door, the height of the people or objects tending to enter the elevator car door is below a set height, and the objects are less than or equal to a set distance from the crack datum line or the people or objects depend on the car door, the door zone protection device (1) enables the first wire to be at a continuous low level and the second wire to be at a fourth type intermittent high level.
13. The elevator car doorway monitoring system of claim 12,
when the door is opened and closed once, when the first wire is in a continuous low level, the second wire has a second type or fourth type intermittent high level but does not have a first type or third type intermittent high level, the door system controller judges that only children or pets enter the car, and outputs a control instruction to control the car door to be fully opened until a door closing button in the car is pressed for a long time.
14. The elevator car doorway monitoring system of claim 8 or 11,
the gate area protection device (1) outputs the electrical level to the conductive line of the gate area state signal interface (4) in a push-pull mode.
15. The elevator car doorway monitoring system of claim 9 or 12,
the frequencies of different types of intermittent high levels on the conductive wire of the gate area state signal interface (4) are the same, but the duty ratios are different;
the various intermittent high levels have the same frequency but different duty cycles.
16. The elevator car doorway monitoring system of claim 9 or 12,
the frequencies of different types of intermittent high levels on the conducting wires of the gate area state signal interface (4) are different.
17. The elevator car doorway monitoring system of claim 9 or 12,
the set height is 1.2 m.
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