CN115092785A - Millimeter wave radar-based early warning method and system for children to enter and exit elevator car independently - Google Patents
Millimeter wave radar-based early warning method and system for children to enter and exit elevator car independentlyDownload PDFInfo
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- CN115092785A CN115092785ACN202210701334.6ACN202210701334ACN115092785ACN 115092785 ACN115092785 ACN 115092785ACN 202210701334 ACN202210701334 ACN 202210701334ACN 115092785 ACN115092785 ACN 115092785A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/3492—Position or motion detectors or driving means for the detector
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/021—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions the abnormal operating conditions being independent of the system
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Abstract
Description
Technical Field
The application relates to the technical field of outdoor safety early warning of children, in particular to an early warning method and system for enabling children to enter and exit an elevator car independently based on millimeter wave radar.
Background
In the event of a safety accident of taking a vertical lift, many cases occur due to the fact that children forget to take the lift or are dismissed by the children after the children walk into the lift car independently due to the fact that the lift is closed, and therefore in daily life, the children need to be prevented from taking the lift independently or getting in and out of the lift car independently.
In the related technology, decision-making early warning is mostly performed by combining manual judgment in modes of camera monitoring, face recognition, voice recognition, key distress call and the like. When the manager sees that the camera shoots that abnormal conditions occur in the car. In some cases, the monitoring equipment can introduce an artificial intelligence judgment mode, and judges whether an alarm needs to be sent to prompt an administrator according to the facial expression and the state of the passenger shot by the camera.
However, camera monitoring requires an elevator manager to actively check the monitoring in the elevator car, which is likely to cause overlooking and untimely handling. The face recognition technology generally only aims at a specific user who inputs face data in advance, but cannot recognize a visitor who takes for the first time; and the camera is installed in the opposite face of lift-cabin door usually, mainly gathers the situation when children get into the elevator, and can't judge that children walk out the elevator alone. Therefore, the early warning method in the related art is not suitable for judging the condition that the child singly goes in and out the elevator car.
Disclosure of Invention
The application relates to a millimeter wave radar-based early warning method and system for enabling children to come in and go out of an elevator car independently, which can accurately identify and early warn the condition that the children come in and go out of the elevator car independently, and the technical scheme is as follows:
on one hand, the early warning method for the children to get in and out of the elevator car independently based on the millimeter wave radar is provided, and the method is applied to the millimeter wave radar for illustration and comprises the following steps:
sending a detection signal and receiving a feedback signal; the feedback signal is a signal generated by reflecting the detection signal after the detection signal contacts with a target in a detection range, the target is positioned in the detection range, and the millimeter wave radar is positioned in the elevator car;
generating an intermediate frequency signal based on the detection signal and the feedback signal;
determining speed data and position data of the target based on the intermediate frequency signal, wherein the speed data indicates the motion state of the target, and the position data indicates the distance between the target and the millimeter wave radar;
judging the opening and closing state of the elevator door based on the position data and the speed data, wherein the opening and closing state of the elevator door comprises an opening state and a closing state;
responding to the condition that the opening and closing state of the elevator door is a closed state, and the target data and the position data accord with the detection standard, and performing target type detection on the target, wherein the target type detection is used for judging the type of the target;
generating an alarm signal in response to the target type detection indicating that the target includes at least one child and not an adult;
and sending an alarm signal to the elevator car central control equipment.
On the other hand, the millimeter wave radar-based early warning system for the children to get in and out of the elevator car independently is provided, and comprises a millimeter wave radar and elevator car central control equipment;
the millimeter wave radar is in communication connection with the elevator car central control equipment;
the millimeter wave radar is used for sending detection signals and receiving feedback signals; the feedback signal is a signal generated by reflecting the detection signal after the detection signal is contacted with a target in a detection range, the target is positioned in the detection range, and the millimeter wave radar is positioned in the elevator car; generating an intermediate frequency signal based on the detection signal and the feedback signal; determining speed data and position data of the target based on the intermediate frequency signal, wherein the speed data indicates the motion state of the target, and the position data indicates the distance between the target and the millimeter wave radar; judging the opening and closing state of the elevator door based on the position data and the speed data, wherein the opening and closing state of the elevator door comprises an opening state and a closing state; responding to the condition that the opening and closing state of the elevator door is a closed state, and the target data and the position data accord with the detection standard, and performing target type detection on the target, wherein the target type detection is used for judging the type of the target; generating an alarm signal in response to the target type detection indicating that the target includes at least one child and not an adult; sending an alarm signal to central control equipment of the elevator car;
the elevator car central control equipment is used for receiving the alarm signal and controlling the sound and light alarm equipment based on the alarm signal; generating alarm information based on the alarm signal; and sending alarm information to a terminal of the elevator car central control equipment.
The beneficial effect that technical scheme that this application provided brought includes at least:
the method comprises the steps of detecting a newly generated moving target in the elevator car in real time by means of a millimeter wave radar with good anti-interference performance, high stability and high precision, determining whether the target with the belly coming in and out of the elevator car is a child or not by combining the precise detection capability of the millimeter wave radar, and giving an alarm when the child comes in and out of the elevator car. The characteristic of millimeter wave radar is utilized, when the elevator car is closed, whether only children come in and go out of the elevator car is accurately judged, and accurate identification and early warning can be carried out on the condition that the children come in and go out of the elevator car alone.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 shows a schematic structural diagram of a warning system for children to individually get in and out of an elevator car based on millimeter wave radar according to an exemplary embodiment of the present application.
Fig. 2 shows a flow chart of a warning method for a child to individually get in and out of an elevator car based on a millimeter wave radar according to an exemplary embodiment of the present application.
Fig. 3 is a schematic flow chart illustrating another warning method for individually giving an elevator car entry and exit to and from a child based on millimeter wave radar according to an exemplary embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
The millimeter wave radar is a radar which works in a millimeter wave band for detection. Usually, the millimeter wave is in the frequency domain of 30 to 300GHz (with a wavelength of 1 to 10 mm). Millimeter-wave radar has some of the advantages of both microwave and photoelectric radar because the wavelength of millimeter-wave waves is intermediate between microwave and centimeter waves. Compared with the centimeter wave seeker, the millimeter wave seeker has the advantages of being small in size, light in weight and high in spatial resolution. The application provides the application of the millimeter wave radar in the technical field of children outdoor safety early warning.
Fig. 1 shows a schematic structural diagram of a warning system for children to individually get in and out of an elevator car based on millimeter wave radar according to an exemplary embodiment of the present application. Referring to fig. 1, the system includes a millimeter wave radar 110 and an elevator car central control device 120. The millimeter wave radar 110 is communicatively coupled to an elevator car central control device 120.
In the embodiment of the application, the elevator car central control device is realized as a physical device with data receiving and alarming functions. The elevator car central control device can be located in the control cabin of the elevator. In one example, the elevator car control device is in binding connection with a mobile phone of a manager, and when receiving the alarm signal, the elevator car control device can send data to the mobile phone of the manager; in another example, the elevator car control equipment is connected with an acousto-optic alarm circuit, and the acousto-optic alarm circuit is in an open state when the elevator car control equipment does not receive an alarm signal and is switched into a closed state when the elevator car control equipment receives the alarm signal; in another example, the elevator car controller may directly control the opening and closing of the elevator doors. The embodiment of the application does not limit the actual implementation form and the complete integrated function of the elevator car controller.
In the embodiment of the application, the millimeter wave radar is installed at the top end of the car wall on one side of the elevator door or other non-sheltered positions, and the space in the elevator car is the detection range of the millimeter wave radar. The antenna of the millimeter wave radar has a multi-reception function, that is, a plurality of signals can be processed in synchronization. The signal processing processes described in the embodiments of the present application are all multi-frame signal synchronous processing processes.
In this case, a millimeter wave radar for transmitting a probe signal and receiving a feedback signal; the feedback signal is a signal generated by reflecting the detection signal after the detection signal is contacted with a target in a detection range, the target is positioned in the detection range, and the millimeter wave radar is positioned in the elevator car; generating an intermediate frequency signal based on the detection signal and the feedback signal; determining speed data and position data of the target based on the intermediate frequency signal, wherein the speed data indicates the motion state of the target, and the position data indicates the distance between the target and the millimeter wave radar; judging the opening and closing state of the elevator door based on the position data and the speed data, wherein the opening and closing state of the elevator door comprises an opening state and a closing state; responding to the condition that the opening and closing state of the elevator door is a closed state, and the target data and the position data accord with the detection standard, and performing target type detection on the target, wherein the target type detection is used for judging the type of the target; generating an alarm signal in response to the target type detection indicating that the target includes at least one child and not an adult; and sending an alarm signal to the elevator car central control equipment.
The elevator car central control equipment is used for receiving the alarm signal and controlling the sound and light alarm equipment based on the alarm signal; generating alarm information based on the alarm signal; and sending alarm information to a terminal in communication connection with the elevator car central control equipment.
To sum up, the system that this application embodiment provided with, with the help of the millimeter wave radar that interference immunity is good, stability is high, the precision is high, carries out real-time detection to the motion target of newly producing in the elevator car to combine the accurate detectivity of millimeter wave radar, confirm whether the target that gets into the car is children, when confirming children access to elevator car, report to the police promptly. The characteristic of millimeter wave radar is utilized, when the elevator car is closed, whether only children come in and go out of the elevator car is accurately judged, and accurate identification and early warning can be carried out on the condition that the children come in and go out of the elevator car alone.
Fig. 2 shows a schematic flow chart of a warning method for a child to individually get in and out of an elevator car based on a millimeter wave radar according to an exemplary embodiment of the present application, which is described by taking an example of applying the method to a millimeter wave radar, and the method includes:
In the embodiment of the present application, the detection signal is implemented as a continuous frequency-modulated sawtooth wave, and the feedback signal is a signal generated by reflecting the detection signal after contacting with a target in the detection range. In the embodiment of the application, because the millimeter wave radar is positioned in the elevator car, part of the feedback signals are generated after the detection signals are contacted with the inner wall of the car.
The process is a process of mixing the detection signal and the feedback signal to obtain an intermediate frequency signal.
In the embodiment of the present application, after the intermediate frequency signal is processed, at least one target in the detection range can be determined. Optionally, the synchronous feature extraction is performed on the plurality of intermediate frequency signals, a cluster point cloud corresponding to the target may be obtained, and based on the analysis of the cluster point cloud, the relevant feature of at least one target may be determined. In the embodiment of the present application, the characteristics of the target can be characterized by the speed data and the position data, so that the processing of the intermediate frequency signal will finally obtain the speed data and the position data corresponding to the target. Optionally, wherein the speed data indicates a motion state of the target and the position data indicates a distance of the target from the millimeter wave radar;
and step 204, judging the opening and closing state of the elevator door based on the position data and the speed data.
In the embodiment of the application, the opening and closing state of the elevator door can be judged through the position and the speed of the target. For example, if the target is located outside the range of the car of the elevator and the target moves at a high speed, it is determined that the elevator door is open. If the target is located in the range of the elevator car and the target is static, the elevator door is judged to be in a closed state at the moment.
And step 205, performing target type detection on the target in response to that the opening and closing state of the elevator door is a closed state, and the target data and the position data accord with the detection standard.
In the embodiment of the present application, the object type detection is used to determine the type of the object, that is, determine whether the object is an adult or a child.
In response to the object type detection indicating that at least one child is included in the object and no adult is included in the object, an alarm signal is generated,step 206.
Optionally, in the embodiment of the present application, when it is determined that there is only a child in the elevator car, the warning is required by the elevator car central control device. The millimeter wave radar will generate an alarm signal.
And step 207, sending an alarm signal to the elevator car central control equipment.
In the embodiment of the application, after the central control device of the elevator car receives the alarm signal, the alarm signal is converted into other forms of warning information according to the structure of the central control device and the connection relation of the central control device and the external device, and the warning information is known by a manager of the elevator car.
In summary, the method provided by the embodiment of the application exerts the characteristics of good anti-interference performance, high stability and high precision of the millimeter wave radar, detects the newly generated moving target in the elevator car in real time, determines whether the target entering the car is a child or not by combining the accurate detection capability of the millimeter wave radar, and gives an alarm when the child is determined to enter or leave the elevator car. The characteristic of millimeter wave radar is utilized, when the elevator car is closed, whether only children come in and go out of the elevator car is accurately judged, and accurate identification and early warning can be carried out on the condition that the children come in and go out of the elevator car alone.
Fig. 3 shows a flowchart of an early warning method for a child to individually get in and out of an elevator car based on a millimeter wave radar according to an exemplary embodiment of the present application, which is described by taking as an example that the method is applied to an early warning system for a child to individually get in and out of an elevator car based on a millimeter wave radar, and the method includes:
This process corresponds to the process ofstep 201, and is not described herein.
This process corresponds to the process ofstep 202, and is not described herein.
And 303, performing one-dimensional fast Fourier transform processing on the intermediate frequency signal by the millimeter wave radar to obtain the distance characteristic corresponding to the target.
The process is a process of performing first-dimension processing on the intermediate-frequency signal, and through the process, a one-dimension feature corresponding to the target can be obtained.
And 304, performing two-dimensional fast Fourier transform processing on the intermediate frequency signal and the distance characteristic by the millimeter wave radar to obtain a speed characteristic corresponding to the target.
The process is a process of performing second-dimensional processing on the intermediate frequency signal, and through the process, the speed characteristic corresponding to the target can be calculated.
The process is to further process the intermediate frequency signal by introducing a DBF algorithm to obtain the angle characteristic between the target and the millimeter wave radar. The angular characteristic indicates a relative angle between the millimeter wave radar and the target when expressed in angular coordinates.
And step 306, generating a point cloud characteristic matrix of the target by the millimeter wave radar according to the distance characteristic, the speed characteristic and the angle characteristic.
And (4) integrating the distance characteristic, the speed characteristic and the angle characteristic to obtain point cloud information associated with the target. Optionally, the point cloud information is a feature matrix, where each row represents a point in the target, and each column represents a dimension, and may represent an angle, a radial velocity, a radial distance, and the like of the target point relative to the radar.
And 307, the millimeter wave radar carries out target truth verification on the point cloud characteristic matrix.
In the embodiment of the application, the verification of the target truth is the verification of the matching degree of the motion state represented in the point cloud characteristic matrix and the kinematics rule.
Optionally, if an object is real, the point cloud corresponding to the object has a certain regularity in several consecutive frames. For example, when an object is a stationary object, its distance and speed characteristics should be constant; when an object is a moving object, the relationship between the change of the distance characteristic and the change of the speed characteristic should conform to the kinematics law.
And 308, the millimeter wave radar responds to the point cloud characteristic matrix and passes through target authenticity verification, and position data and speed data corresponding to the target are determined.
Optionally, after determining that the target is real, the position data of the target and the speed data of the target may be obtained.
Step 309, the millimeter wave radar judges the open/close state of the elevator door based on the position data and the speed data.
In the embodiment of the application, in response to the fact that the position data corresponding to at least one target indicate that the distance between the target and the millimeter wave radar is larger than the safety threshold value or no target with the distance between the target and the millimeter wave radar equal to the safety distance threshold value exists, the opening and closing state of the elevator car is determined to be the opening state; and determining that the opening and closing state of the elevator car is a closed state in response to the situation that the position data corresponding to all the targets indicate that the distances between the targets and the millimeter wave radar are smaller than a distance threshold value and the distances between the existing targets and the millimeter wave radar are equal to a safety distance threshold value. Optionally, the millimeter wave radar may also receive a control signal sent by the elevator central control device, so as to implement judgment on opening and closing of the elevator door.
In this case, after the open/close state of the elevator door is determined, in the embodiment of the present application, the millimeter wave radar performs processing and subsequent determination processes on the intermediate frequency signal received when the elevator door is opened after the elevator door is closed. In other embodiments of the present application, the millimeter wave radar may perform real-time determination, or the millimeter wave radar may perform a subsequent determination process when the elevator door is opened. The present application does not limit the time at which the millimeter wave radar performs calculation.
In step 310, the millimeter wave radar indicates that the target is outside the elevator car in response to the position data and the speed data indicates that the target is near the elevator car, or indicates that the target is moving from inside the elevator car to outside the elevator car in response to the position data and the speed output indicates that the target is far from the elevator car, and the height of the target is determined based on the position data and the speed data.
Optionally, the process is a process of determining the height of the target based on the point cloud information corresponding to the target.
In the embodiment of the present application, the case where the warning is required is a case where only a child who walks into the elevator car alone, or a case where only a child who walks out of the elevator car alone, and therefore, in this case,
optionally, in other embodiments of the present application, the worker may adjust the determination mode of the millimeter wave radar according to the type of the millimeter wave radar, the work bearing capacity of the millimeter wave radar, and the detection state of the actual demand. Shown in step 310 is only one decision mode. In another example, the millimeter wave radar makes a height determination of the target in response to the position data indicating that the target is located within the elevator car. The process can directly judge whether only children exist in the elevator car, and when only children exist in the elevator car, the alarm is given.
And 311, determining the type of the target according to the height of the target by the millimeter wave radar.
In an embodiment of the present application, in response to the height of the target being above a first height threshold, determining the type of the target as adult; in response to the height of the target being below a first height threshold and above a second height threshold, determining that the type of the target is a child; in response to the height of the target being below the second height threshold, determining the type of the target as other dynamic targets.
In one example, the first height threshold is 1.2 meters and the second height threshold is 0.6 meters. Optionally, the elevator manager can modify the value threshold to adapt to the actual application according to the actual situation of common passengers in the elevator.
Instep 312, the millimeter wave radar generates an alarm signal in response to the target type detection indicating that the target includes at least one child and that the target does not include an adult.
The process is the same as the process described instep 206 and is not described herein.
And 313, sending an alarm signal to the elevator car central control equipment by the millimeter wave radar.
And step 314, the elevator car central control equipment receives the alarm signal.
Steps 313 to 314 are processes of sending alarm signals by the millimeter wave radar and receiving the alarm signals by the central control device of the elevator car correspondingly.
And 315, generating alarm information by the elevator car central control equipment based on the alarm signal.
And step 316, the elevator car central control equipment sends alarm information to a terminal in communication connection with the elevator car central control equipment.
In summary, the method provided by the embodiment of the application detects a newly generated moving target in an elevator car in real time by means of the millimeter wave radar with good anti-interference performance, high stability and high precision, determines whether the target entering the car is a child or not by combining the accurate detection capability of the millimeter wave radar, and gives an alarm when the child is determined to enter or exit the elevator car. The characteristic of millimeter wave radar is utilized, when the elevator car is closed, whether only children come in and go out of the elevator car is accurately judged, and accurate identification and early warning can be carried out on the condition that the children come in and go out of the elevator car alone.
The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (8)
1. A warning method for children to individually go in and out of an elevator car based on a millimeter wave radar is characterized in that the method is applied to the millimeter wave radar, and comprises the following steps:
sending a detection signal and receiving a feedback signal; the feedback signal is a signal generated by reflecting the detection signal after the detection signal is contacted with a target in a detection range, the target is positioned in the detection range, and the millimeter wave radar is positioned in the elevator car;
generating an intermediate frequency signal based on the detection signal and the feedback signal;
determining speed data and position data of the target based on the intermediate frequency signal, the speed data indicating a motion state of the target, the position data indicating a distance between the target and the millimeter wave radar;
judging the opening and closing state of the elevator door based on the position data and the speed data, wherein the opening and closing state of the elevator door comprises an opening state and a closing state;
responding to the condition that the opening and closing state of the elevator door is a closed state, and the target data and the position data accord with a detection standard, and performing target type detection on the target, wherein the target type detection is used for judging the type of the target;
generating an alarm signal in response to the target type detection indicating that at least one child is included in an exclusion zone and no adult is included in the exclusion zone;
and sending the alarm signal to the elevator car central control equipment.
2. The millimeter wave radar-based early warning method for the separate entrance and exit of a child into and out of an elevator car as set forth in claim 1, wherein the determining of the velocity data and the position data of the target based on the intermediate frequency signal comprises:
performing one-dimensional fast Fourier transform processing on the intermediate frequency signal to obtain a distance characteristic corresponding to the target;
performing two-dimensional fast Fourier transform processing on the intermediate frequency signal and the distance characteristic to obtain a speed characteristic corresponding to the target;
processing the intermediate frequency signal through a digital beam forming DBF algorithm to obtain an angle characteristic corresponding to the target;
determining position data and the velocity data corresponding to the target based on the distance feature, the velocity feature, and the angle feature.
3. The millimeter wave radar-based method for alerting an individual entry and exit of a child to an elevator car as set forth in claim 2, wherein the determining the position data and the velocity data corresponding to the target based on the distance feature, the velocity feature and the angle feature comprises:
generating a point cloud characteristic matrix of the target according to the distance characteristic, the speed characteristic and the angle characteristic;
performing target truth verification on the point cloud feature matrix, wherein the target truth verification is the verification of the matching degree of the motion state represented in the point cloud feature matrix and the kinematic rule;
and determining the position data and the speed data corresponding to the target in response to the point cloud feature matrix passing the target truth verification.
4. The millimeter wave radar-based early warning method for children to individually get in and out of an elevator car as claimed in claim 1, wherein the determining the open and closed states of the elevator door based on the position data and the speed data comprises:
in response to position data corresponding to at least one target indicating that the distance between the target and the millimeter wave radar is greater than a safety threshold or that no target exists, the distance between the target and the millimeter wave radar being equal to the safety distance threshold, determining that the opening and closing state of the elevator car is an opening state;
and determining that the opening and closing state of the elevator car is a closed state in response to the fact that the position data corresponding to all the targets indicate that the distances between the targets and the millimeter wave radar are smaller than a distance threshold value and the distances between the existing targets and the millimeter wave radar are equal to a safety distance threshold value.
5. The millimeter wave radar-based early warning method for children individually getting in and out of an elevator car as claimed in claim 1, wherein the target type detection of the target in response to the open/close state of the elevator door being a closed state and the target data and the position data meeting detection criteria comprises:
in response to the position data indicating that the target is outside an elevator car and the speed data indicating that the target is near the elevator car, or in response to the position data indicating that the target is moving from inside the elevator car to outside the elevator car and the speed output indicating that the target is moving inside the elevator car, determining an altitude of the target based on the position data and the speed data;
determining the type of the target according to the height of the target, wherein the type of the target comprises adults, children and other dynamic targets.
6. The millimeter wave radar-based method for alerting children to individually get in and out of an elevator car as claimed in claim 5, wherein the determining the type of the target according to the height of the target comprises:
in response to the height of the target being above a first height threshold, determining that the type of the target is an adult;
in response to the height of the target being below a first height threshold and above a second height threshold, determining that the type of the target is a child;
in response to the height of the target being below a second height threshold, or the height of the target being above the first height threshold, determining the type of the target as other dynamic targets.
7. The millimeter wave radar-based early warning method for the independent entrance and exit of children into and out of an elevator car as claimed in claim 1, wherein the millimeter wave radar is located on the top inside the elevator car.
8. The early warning system for the children to individually go in and out of the elevator car based on the millimeter wave radar is characterized by comprising the millimeter wave radar and elevator car central control equipment;
the millimeter wave radar is in communication connection with the elevator car central control equipment;
the millimeter wave radar is used for sending detection signals and receiving feedback signals; the feedback signal is a signal generated by reflecting the detection signal after the detection signal is contacted with a target in a detection range, the target is positioned in the detection range, and the millimeter wave radar is positioned in the elevator car; generating an intermediate frequency signal based on the detection signal and the feedback signal; determining speed data and position data of the target based on the intermediate frequency signal, the speed data indicating a motion state of the target, the position data indicating a distance between the target and the millimeter wave radar; judging the opening and closing state of the elevator door based on the position data and the speed data, wherein the opening and closing state of the elevator door comprises an opening state and a closing state; responding to the condition that the opening and closing state of the elevator door is a closed state, and the target data and the position data accord with a detection standard, and performing target type detection on the target, wherein the target type detection is used for judging the type of the target; generating an alarm signal in response to the object type detection indicating that at least one child is included in the object and no adult is included in the object; sending the alarm signal to the elevator car central control equipment;
the elevator car central control equipment is used for receiving the alarm signal and controlling sound and light alarm equipment based on the alarm signal; generating alarm information based on the alarm signal; and sending the alarm information to a terminal in communication connection with the elevator car central control equipment.
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| CN202210701334.6ACN115092785B (en) | 2022-06-21 | 2022-06-21 | Early warning method and system for child to independently enter and exit elevator car based on millimeter wave radar |
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| CN202210701334.6ACN115092785B (en) | 2022-06-21 | 2022-06-21 | Early warning method and system for child to independently enter and exit elevator car based on millimeter wave radar |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116002478A (en)* | 2023-01-06 | 2023-04-25 | 广东卓梅尼技术股份有限公司 | Elevator car running method and life body height detection device in the elevator car |
| CN116216448A (en)* | 2023-02-01 | 2023-06-06 | 成都睿瞳科技有限责任公司 | An abnormal detection method of elevator door opening and closing based on millimeter wave |
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| EP2784016A1 (en)* | 2013-03-27 | 2014-10-01 | Inventio AG | Child safety device of a lift assembly |
| CN111362077A (en)* | 2020-04-26 | 2020-07-03 | 苏州市职业大学 | Elevator monitoring system for preventing children from taking elevator alone |
| CN112119029A (en)* | 2018-05-25 | 2020-12-22 | 三菱电机株式会社 | Elevator control device |
| WO2021147122A1 (en)* | 2020-01-20 | 2021-07-29 | 京东方科技集团股份有限公司 | Human detection method and apparatus, terminal device, storage medium, and electronic device |
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| EP2784016A1 (en)* | 2013-03-27 | 2014-10-01 | Inventio AG | Child safety device of a lift assembly |
| CN112119029A (en)* | 2018-05-25 | 2020-12-22 | 三菱电机株式会社 | Elevator control device |
| WO2021147122A1 (en)* | 2020-01-20 | 2021-07-29 | 京东方科技集团股份有限公司 | Human detection method and apparatus, terminal device, storage medium, and electronic device |
| CN111362077A (en)* | 2020-04-26 | 2020-07-03 | 苏州市职业大学 | Elevator monitoring system for preventing children from taking elevator alone |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116002478A (en)* | 2023-01-06 | 2023-04-25 | 广东卓梅尼技术股份有限公司 | Elevator car running method and life body height detection device in the elevator car |
| CN116216448A (en)* | 2023-02-01 | 2023-06-06 | 成都睿瞳科技有限责任公司 | An abnormal detection method of elevator door opening and closing based on millimeter wave |
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| CN115092785B (en) | 2024-07-12 |
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