CN110683441A - Elevator trapping detection device and control method thereof - Google Patents
Elevator trapping detection device and control method thereof Download PDFInfo
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- CN110683441A CN110683441A CN201910887798.9A CN201910887798A CN110683441A CN 110683441 A CN110683441 A CN 110683441A CN 201910887798 A CN201910887798 A CN 201910887798A CN 110683441 A CN110683441 A CN 110683441A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
- B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
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Abstract
The invention discloses a device for detecting people trapping of an elevator and a control method thereof, wherein the device comprises: the command reading unit is used for detecting a door opening command of the elevator control panel; the personnel detection unit is used for detecting whether a person exists in the elevator car; a motor detecting unit for detecting a driving current or temperature of a driving motor of the elevator door; the person trapping judgment unit is used for judging whether people are trapped or not according to the detection data of the motor detection unit after the person detection unit detects the person and the instruction reading unit detects the door opening instruction; and the alarm unit is used for generating an alarm after the trapped person judgment unit judges the trapped person. According to the invention, after the door opening instruction and the presence of a person in the elevator car are detected, the abnormal condition of the elevator door is judged by detecting the current or the temperature of the driving motor of the elevator door during working. The invention can be widely applied to the field of elevator equipment.
Description
Technical Field
The invention relates to the field of elevator equipment, in particular to an elevator people trapping detection device and a control method thereof.
Background
With the popularization of high-rise buildings, elevators almost become standard fittings of each new building, and the elevator industry is also fully developed. The speed of elevators has become faster with increasing floors and people demanding efficiency. Meanwhile, people pay more and more attention to the safety problem of the elevator.
In real life, however, elevators are stranded with people events. When the elevator is trapped, if the alarm is not generated in time, not only can the trapped people be injured by the body and mind, but also the reputation loss can be suffered by the elevator manufacturer. If the detection is inaccurate, false alarms are often generated, and the time of maintenance personnel is greatly wasted.
In the existing elevator, a multi-part elevator does not have a trapped person detection function, and the elevator is used as special equipment, so that the direct transformation of circuits and the like of the elevator is generally not allowed, and at most, the command of an elevator control panel can only be monitored through a data outward transmission interface of the elevator control panel. This adds difficulty to retrofitting existing elevators by afterloading.
The most difficult is to detect the situation that the elevator door can not be opened, aiming at the problem that the elevator is trapped by people. In the prior art, whether the elevator door is normally opened or not is often judged by detecting images through a camera, and although the method is feasible, the method is easily interfered by the environment of the elevator. In an elevator car, a camera can not only shoot passengers, but also shoot posters or multimedia playing equipment and other interferences in the elevator. Especially, multimedia playing equipment has different playing pictures, and the screen-projection type playing equipment directly projects the pictures on the elevator door, which can greatly affect the image recognition result. Therefore, the prior art has the problem of low accuracy.
Disclosure of Invention
To solve the above technical problems, the present invention aims to: provided are an elevator trapping detection device and a control method thereof to increase accuracy.
A first aspect of an embodiment of the present invention provides:
an elevator entrapment detection apparatus, comprising:
the command reading unit is used for detecting a door opening command of the elevator control panel;
the personnel detection unit is used for detecting whether a person exists in the elevator car;
a motor detecting unit for detecting a driving current or temperature of a driving motor of the elevator door;
the person trapping judgment unit is used for judging whether people are trapped or not according to the detection data of the motor detection unit after the person detection unit detects the person and the instruction reading unit detects the door opening instruction;
and the alarm unit is used for generating an alarm after the trapped person judgment unit judges the trapped person.
Further, judge according to motor detecting element's detected data whether stranded, it specifically includes:
and judging whether the rising amplitude of the current or the temperature is larger than a first set threshold value or not according to the detection data of the motor detection unit within a first set time after the door opening instruction is detected, and if so, judging that the person is trapped.
Further, judge according to motor detecting element's detected data whether stranded, it specifically includes:
judging whether the current is smaller than a second set threshold value or not according to the detection data of the motor detection unit within a second set time after the door opening instruction is detected; if yes, judging the person is trapped.
Further, the sleepy person judging unit is further configured to:
and judging the trapped people after the people detection unit detects people in the elevator and no door opening command is detected after the third set time.
Further, still include:
a motion detection unit for detecting a motion state of the elevator car;
the people trapping judgment unit is also used for judging people trapping after the people detection unit detects that people exist and the movement detection unit detects that the time for stopping the elevator car in the non-stop area exceeds a third set time.
Further, the alarm unit comprises a communication unit installed on the elevator car and a signal relay unit installed in the elevator shaft;
the communication unit communicates with the signal relay unit in a wireless mode; the signal relay unit communicates with an external network.
Further, the personnel detection unit is an infrared detection unit which determines whether a person is present by detecting characteristic infrared in the car.
A second aspect of an embodiment of the present invention provides:
a control method of an elevator people trapping detection device comprises the following steps:
detecting a door opening instruction of an elevator control panel;
detecting whether a person exists in an elevator car;
detecting a driving current or temperature of a driving motor of an elevator door;
after the personnel detection unit detects the existence of a person and the instruction reading unit detects the door opening instruction, judging whether the person is trapped according to the detection data of the motor detection unit;
and generating an alarm after the trapped person judgment unit judges that the person is trapped.
Further, judge according to motor detecting element's detected data whether stranded, it specifically includes:
and judging whether the rising amplitude of the current or the temperature is larger than a first set threshold value or not according to the detection data of the motor detection unit within a first set time after the door opening instruction is detected, and if so, judging that the person is trapped.
Further, judge according to motor detecting element's detected data whether stranded, it specifically includes:
judging whether the current is smaller than a second set threshold value or not according to the detection data of the motor detection unit within a second set time after the door opening instruction is detected; if yes, judging the person is trapped.
The embodiment of the invention has the beneficial effects that: according to the invention, after the door opening instruction and the presence of a person in the elevator car are detected, the abnormal condition of the elevator door is judged by detecting the current or the temperature of the driving motor of the elevator door during working.
Drawings
Fig. 1 is a block diagram of a trapping detection device for an elevator according to an embodiment of the present invention;
fig. 2 is a flowchart of a control method of an elevator passenger entrapment detecting apparatus according to an embodiment of the present invention.
Detailed Description
The invention is further described with reference to the drawings and the specific examples.
Referring to fig. 1, the present embodiment discloses an elevator trapping detection device, which includes an instruction reading unit 110, a person detection unit 120, a motor detection unit 130, a trapping judgment unit 140, and an alarm unit 150. The people trapping determination unit 140 is connected to the instruction reading unit 110, the people detection unit 120, and the motor detection unit 130, respectively.
Among them, in the device of this embodiment:
the command reading unit 110 is used for detecting a door opening command of the elevator control panel;
a person detection unit 120 for detecting whether a person is in the elevator car;
a motor detecting unit 130 for detecting a driving current or temperature of a driving motor of the elevator door;
the people trapping judgment unit 140 is used for judging whether people are trapped or not according to the detection data of the motor detection unit after the people detection unit detects people and the instruction reading unit detects the door opening instruction;
and an alarm unit 150 for generating an alarm after the trapped person judgment unit judges the trapped person.
The command reading unit 110 is used for reading data of the elevator control panel from a data outward transmission interface of the elevator control panel and analyzing the read data according to a communication protocol of the elevator control panel, so that a control command for controlling the door opening of the elevator car is analyzed from the read data. The instruction reading unit 110 is formed by a processor and a circuit for connecting a data transmission interface of an elevator control panel.
The people detection unit 120, which functions to determine whether there is a person in the elevator car by sensing, may be implemented by using, for example, a pressure sensor and an infrared sensor. The infrared sensor can be realized by infrared geminate transistors or pyroelectric infrared sensors.
As for the motor detecting unit 130, it is implemented by a hall sensor or a temperature sensor. The principle of detecting whether the elevator door is malfunctioning by the motor detecting unit 130 is that when the elevator door is stuck, the current will surge, resulting in a temperature rise. Therefore, the elevator door can be judged to be jammed only by detecting the rise of the temperature or the current and rising to a certain degree. Because the temperature sensor can only be installed outside the motor, the temperature transmission takes time, and the motor is provided with a heat dissipation structure, the detection is difficult for small temperature change. In contrast, the hall sensor can sensitively detect the current change of the electric wire, so that the current magnitude of the current of the motor can be sensitively sensed as long as the hall sensor is installed on the power supply wire of the motor.
In addition to the above-described situation where the elevator door is jammed, if the wiring between the motor and the elevator operating panel is interrupted, the door cannot be opened normally. For example, the motor has burnt out an open circuit or the supply line breaks. Obviously, in these cases, the motor cannot normally drive the elevator door open. However, in the above case, the detection can be performed by the present embodiment. First, after it is determined that the door opening command is detected, if any temperature change or current change is not detected, for example, the current is maintained near 0A. That means that no current at all flows on the motor. It means that the motor has not executed a door open command.
For the above situation, the present embodiment can detect accurately.
The sleepy person determination unit 140, which is implemented by a processor, determines whether an abnormality occurs in the elevator door based on the above-described principle when it is determined that there is a person in the elevator car.
The processor implementing the people trapping determination unit 140 may be the same processor as the processor implementing the instruction fetch unit 110.
And an alarm unit 150 that generates an alarm after the trapped person is determined by the trapped person determination unit 140. For example, the alarm information is sent to the relevant responsible person in a short message/WeChat mode. The relevant responsible person can also be informed by a voice recording telephone. Of course, the elevator control panel is also integrated with an emergency call device in general, but actually, the emergency call device of the elevator control panel can only be electrified with a duty room, and in most cases, the call circuit is a telephone line, so that once the telephone line is bitten by a mouse or a duty person is absent, trapped people cannot contact the duty person. The alarm unit adopted in the embodiment is composed of at least one communication module.
Therefore, in this embodiment, it is necessary to provide one more alarm unit, and the alarm unit in this embodiment may also adopt a wireless communication mode.
As a preferred embodiment, the determining whether the person is trapped according to the detection data of the motor detection unit specifically includes:
and judging whether the rising amplitude of the current or the temperature is larger than a first set threshold value or not according to the detection data of the motor detection unit within a first set time after the door opening instruction is detected, and if so, judging that the person is trapped.
This embodiment gives a specific way of detecting the above discussed situation where the elevator door gets stuck, resulting in a trapped person. Because the motor is not in place, the control signal of elevator control panel can not be interrupted, and the motor blocks inactively, therefore the electric current through the coil rises rapidly and sharply to lead to motor temperature to rise. In this case, the magnitude of the current or the magnitude of the temperature may be larger than normal, and in particular the magnitude of the current rise is clearly discernible. For example, the motor may operate normally at 1A, while the motor may be stuck at 5A. The reason why the detection is performed within the set time is to eliminate the current variation of the motor at the beginning and a time before the end, in other words, the present embodiment selects the detection during the smooth operation of the motor. For example, for a certain type of elevator, it takes 3 seconds for the elevator door to open and close after the elevator control panel generates the door open signal. It is possible to select to detect the change of the current within the 1 st second to the 2 nd second of the detection of the door opening signal in order to avoid the detection being disturbed by the pulse current generated when the motor is started and the reverse electromotive force generated when the motor is stopped. Of course, the rise in current is here compared with when the motor is not started, i.e. with 0A.
This first time interval is therefore preferably selected for detection during the middle of the expected door opening time of the elevator. E.g. the middle 1/3, 2/3 or 3/5 of the elevator door opening process, etc. In short, as long as the detection time crosses 1/2 of the opening time of the elevator door, even if the elevator door is jammed in the middle, the present embodiment does not detect the state and will not cause people trapping. Since the trapped condition is that the person cannot go out, the normal person can go out with the elevator door opened 1/2, and there is no big problem even if the door is opened. In the embodiment, the first time interval is set to detect the current, so that the possibility of false detection can be reduced.
Similarly, the first time interval is set for the temperature, because the temperature needs to be transferred for a certain time, and the heat can be accumulated, and the temperature should be detected to avoid the period of time when the motor starts to start. For example, the door opening time is also 3 seconds, and the temperature can be detected from 1 st second to 4 th second, which is equivalent to delaying the start of detection for one second for 3 seconds. In this embodiment, the temperature can be measured by a peak value and an average value, and is specifically set according to the sensitivity of the sensor.
As a preferred embodiment, the determining whether the person is trapped according to the detection data of the motor detection unit specifically includes:
judging whether the current is smaller than a second set threshold value or not according to the detection data of the motor detection unit within a second set time after the door opening instruction is detected; if yes, judging the person is trapped.
The present embodiment provides a specific method of detecting a trapped condition caused when there is a circuit break between the elevator operating panel and the motor. The present embodiment mainly performs detection by means of current. The detection principle is that the working current of the motor is kept at a stable value, for example, maintained at about 1A during normal operation. However, if the circuit between the elevator control panel and the motor is broken, the power supply line of the motor does not have electricity, and the condition can be detected by the Hall sensor.
The second set time is also set based on the predicted door opening time, similar to the first set time. The specific determination method may be performed by using the average value or the peak value of the current within the second set time.
Of course, the above situation does not consider an extreme situation, namely that the elevator control panel is suddenly damaged in the running process, and the door opening command cannot be generated at all. At the moment, even if the elevator door is not locked, the driving motor does not have a fault, and the elevator car still cannot be opened normally.
To this end, as a preferred embodiment, the sleepy person judging unit is further configured to:
and judging the trapped people after the people detection unit detects people in the elevator and no door opening command is detected after the third set time.
Generally, even if a person forgets to press a floor after entering an elevator, the person usually responds within one or two minutes. In addition, the elevator is not only controlled by the elevator car, but also the elevator hall call board can trigger the dispatching of the elevator. In the event that the elevator door is blocked, the elevator will also actually periodically trigger a door open command after a door closing failure. Therefore, if a person still does not detect the door opening command of the elevator control panel after entering the elevator for a period of time, for example, more than 5 minutes, it means that there is a very high probability that the elevator door cannot be opened due to the damage of the elevator control panel. The embodiment can detect the condition with smaller occurrence probability, and can make the detection of the embodiment more perfect and accurate.
As a preferred embodiment, referring to fig. 1, the method further includes:
a motion detection unit 160 for detecting a motion state of the elevator car;
the sleepy person judging unit 140 is further configured to judge that the person is sleepy after the person detecting unit 120 detects that the person is present and the movement detecting unit 160 detects that the time when the elevator car stops in the non-stop area exceeds a third set time.
The embodiment adds more detection modes, so that the embodiment can detect more situations. In this embodiment, the motion detection unit 160 may be implemented by an acceleration sensor, which detects the motion speed of the elevator car by the acceleration sensor, so as to determine the current position of the elevator by means of integration or the like. Of course, the device can also determine the current elevator position by reading the encoder of the elevator car drive motor.
As a preferred embodiment, the alarm unit comprises a communication unit mounted on the elevator car and a signal relay unit mounted in the elevator shaft;
the communication unit communicates with the signal relay unit in a wireless mode; the signal relay unit communicates with an external network.
In this embodiment, the alarm unit is composed of two parts, one part is a communication unit on the elevator car, the other part is a signal relay unit in the elevator shaft, the communication unit follows the movement of the car, and the signal relay unit is fixedly installed, so that the signal relay unit can be connected to the network in a wired mode and the like. The embodiment can effectively solve the problem that the wireless signals in the elevator shaft are easily shielded.
As a preferred embodiment, the people detection unit is an infrared detection unit which detects characteristic infrared rays in the car to determine whether there is a person. In this embodiment, the infrared detection unit is specifically a pyroelectric infrared sensor, which can detect characteristic infrared emitted by human beings. In this embodiment, some infrared detection units may be deployed on top of the elevator.
Referring to fig. 2, the present embodiment discloses a control method of an elevator people trapping detection device, which is applied to the above device embodiment, and the present embodiment includes the following steps:
s210, detecting a door opening instruction of an elevator control panel;
s220, detecting whether a person exists in the elevator car;
s230, detecting the driving current or temperature of a driving motor of the elevator door;
s240, judging whether people are trapped or not according to the detection data of the motor detection unit after the people detection unit detects people and the instruction reading unit detects the door opening instruction;
and S250, generating an alarm after people are trapped.
As a preferred embodiment, the determining whether the person is trapped according to the detection data of the motor detection unit specifically includes:
and judging whether the rising amplitude of the current or the temperature is larger than a first set threshold value or not according to the detection data of the motor detection unit within a first set time after the door opening instruction is detected, and if so, judging that the person is trapped.
As a preferred embodiment, the determining whether the person is trapped according to the detection data of the motor detection unit specifically includes:
judging whether the current is smaller than a second set threshold value or not according to the detection data of the motor detection unit within a second set time after the door opening instruction is detected; if yes, judging the person is trapped.
The step numbers in the above method embodiments are set for convenience of illustration only, the order between the steps is not limited at all, and the execution order of each step in the embodiments can be adapted according to the understanding of those skilled in the art.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a stranded detection device of elevator which characterized in that: the method comprises the following steps:
the command reading unit is used for detecting a door opening command of the elevator control panel;
the personnel detection unit is used for detecting whether a person exists in the elevator car;
a motor detecting unit for detecting a driving current or temperature of a driving motor of the elevator door;
the person trapping judgment unit is used for judging whether people are trapped or not according to the detection data of the motor detection unit after the person detection unit detects the person and the instruction reading unit detects the door opening instruction;
and the alarm unit is used for generating an alarm after the trapped person judgment unit judges the trapped person.
2. The elevator trapping detection device according to claim 1, wherein: whether the detection data according to the motor detection unit judges that the motor is trapped or not specifically comprises the following steps:
and judging whether the rising amplitude of the current or the temperature is larger than a first set threshold value or not according to the detection data of the motor detection unit within a first set time after the door opening instruction is detected, and if so, judging that the person is trapped.
3. The elevator trapping detection device according to claim 1, wherein: whether the detection data according to the motor detection unit judges that the motor is trapped or not specifically comprises the following steps:
judging whether the current is smaller than a second set threshold value or not according to the detection data of the motor detection unit within a second set time after the door opening instruction is detected; if yes, judging the person is trapped.
4. The elevator people trapping detection device according to any one of claim 1, wherein: the sleepy person judging unit is further configured to:
and judging the trapped people after the people detection unit detects people in the elevator and no door opening command is detected after the third set time.
5. The elevator passenger detection device according to any one of claims 1 to 4, wherein: further comprising:
a motion detection unit for detecting a motion state of the elevator car;
the people trapping judgment unit is also used for judging people trapping after the people detection unit detects that people exist and the movement detection unit detects that the time for stopping the elevator car in the non-stop area exceeds a third set time.
6. The elevator passenger detection device according to any one of claims 1 to 4, wherein: the alarm unit comprises a communication unit arranged on the elevator car and a signal relay unit arranged in the overhead well;
the communication unit communicates with the signal relay unit in a wireless mode; the signal relay unit communicates with an external network.
7. The elevator passenger detection device according to any one of claims 1 to 4, wherein: the personnel detection unit is an infrared detection unit which determines whether a person is present by detecting characteristic infrared in the car.
8. A control method of an elevator people trapping detection device is characterized in that: the method comprises the following steps:
detecting a door opening instruction of an elevator control panel;
detecting whether a person exists in an elevator car;
detecting a driving current or temperature of a driving motor of an elevator door;
after the personnel detection unit detects the existence of a person and the instruction reading unit detects the door opening instruction, judging whether the person is trapped according to the detection data of the motor detection unit;
after the trapping is determined, an alarm is generated.
9. The control method of the elevator trapping detection device according to claim 8, characterized in that: whether the detection data according to the motor detection unit judges that the motor is trapped or not specifically comprises the following steps:
and judging whether the rising amplitude of the current or the temperature is larger than a first set threshold value or not according to the detection data of the motor detection unit within a first set time after the door opening instruction is detected, and if so, judging that the person is trapped.
10. The control method of the elevator trapping detection device according to claim 8, characterized in that: whether the detection data according to the motor detection unit judges that the motor is trapped or not specifically comprises the following steps:
and judging whether the current is smaller than a second set threshold value or not according to the detection data of the motor detection unit within a second set time after the door opening instruction is detected, and if so, judging that the person is trapped.
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| CN201910887798.9A CN110683441A (en) | 2019-09-19 | 2019-09-19 | Elevator trapping detection device and control method thereof |
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| CN111559682A (en) * | 2020-05-27 | 2020-08-21 | 江苏省特种设备安全监督检验研究院 | Remote rescue system and method for elevator trapped people under specific conditions and elevator |
| CN112693986A (en) * | 2020-12-14 | 2021-04-23 | 西人马联合测控（泉州）科技有限公司 | Automatic alarming method, device and equipment for elevator people trapping and computer storage medium |
| CN113233276A (en) * | 2021-05-13 | 2021-08-10 | 上海江菱机电有限公司 | Auxiliary analysis method and system for monitoring failure of trapped image of elevator car |
| CN114132811A (en) * | 2021-11-30 | 2022-03-04 | 广州绰立科技有限公司 | Method and device for detecting trapping of elevator, equipment and storage medium |
| CN114955761A (en) * | 2022-06-18 | 2022-08-30 | 宁波昊鸿电子有限公司 | Elevator trapped-state detection method and system, storage medium and intelligent terminal |
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Application publication date: 20200114 |