Monitoring and alarming system for abnormal postures of passengers in barrier-free toilet of train

Abstract

The invention relates to a train barrier-free toilet passenger abnormal posture monitoring and alarming system, and the system comprises an information obtaining module which obtains the point cloud information of the interior of a barrier-free toilet; the compartment controller is connected with the information acquisition module, extracts the point cloud information of the passenger contour from the point cloud information in the toilet, obtains the passenger skeleton point cloud coordinates according to the point cloud information of the passenger contour, and analyzes the current state of the passenger; whether the current state of the passenger is abnormal or not is judged, and / or whether the passenger skeleton point cloud coordinates change within a time threshold value or not is judged, and if yes, abnormal result information is sent out; and the passenger information system controller is connected with the carriage controller, sends out alarm information through an Ethernet bus after receiving the abnormal result information, and is communicated with communication equipment in the toilet for interacting with passengers in the toilet. Through the method and the device, the problem of poor passenger privacy protection performance is solved, the passenger privacy is protected, and the current state of the passenger is effectively monitored.

Description

Technical Field

[0001] The present application relates to the field of rail transportation, and in particular to a system for monitoring and alarming abnormal postures of passengers in barrier-free toilets on trains. Background Art

[0002] As rail travel services continue to improve, EMUs are equipped with accessible restrooms for passengers with disabilities. These restrooms are equipped with alarm buttons for passenger convenience. However, these buttons only work if a passenger proactively initiates an alarm. For passengers who are unable to provide an alarm on their own, such as those who have fallen or are unconscious, the alarm button cannot be used to alert the public.

[0003] To better protect passengers, radar and other detection equipment are generally used to obtain images of passengers, analyze and judge the current behavior trends of the passengers in the images, and determine whether the passengers are in an abnormal state.

[0004] However, when used in barrier-free toilets on EMUs, detection equipment such as radar may penetrate passengers' clothing and detect the human body surface, posing a problem of infringing on passengers' privacy. Summary of the Invention

[0005] An embodiment of the present application provides a system for monitoring and alarming abnormal postures of passengers in barrier-free toilets on trains, so as to at least solve the problem in the prior art that radar detection may infringe on the privacy of passengers.

[0006] In a first aspect, an embodiment of the present application provides a system for monitoring and alarming abnormal postures of passengers in barrier-free toilets on trains, comprising: An information acquisition module is located in the barrier-free toilet on the train and is configured to obtain the door lock status of the barrier-free toilet. When the door lock status is closed, the module acquires and sends point cloud information inside the barrier-free toilet. A carriage controller is provided in each carriage and connected to the information acquisition modules in each barrier-free restroom in the carriage in which it is located, and is configured to receive point cloud information from the interior of each barrier-free restroom in the carriage in which it is located, and extract point cloud information of the passenger's external contour from the point cloud information inside the barrier-free restroom; after simplifying the skeleton features based on the point cloud information of the passenger's external contour, the passenger's skeleton point cloud coordinates, the descent speed of the hip joint center, the angle between the body centerline and the floor of the barrier-free restroom, and the height coordinates of the head and shoulder joints are calculated; the passenger's current state is analyzed to determine whether the passenger's current state is abnormal, and / or whether the passenger's skeleton point cloud coordinates have changed within a time threshold. If so, the passenger is in an abnormal state, and abnormal result information about the barrier-free restroom in which the passenger is located is issued; The passenger information system controller is connected to each carriage controller and is configured to send out an alarm message via the Ethernet bus after receiving abnormal result information, and connect to the communication equipment in the abnormal barrier-free toilet.

[0007] In some embodiments, the point cloud information inside the accessible toilet includes initial environmental information and preliminary point cloud information. The information acquisition module is further configured to acquire the initial environmental information inside the accessible toilet before the accessible toilet is opened, and acquire the preliminary point cloud information inside the accessible toilet after the accessible toilet is opened and the door lock is closed. The car controller is further configured to receive the initial environmental information and preliminary point cloud information, perform background filtering on the preliminary point cloud information based on the initial environmental information, and extract point cloud information of the passenger's outline.

[0008] In some embodiments, the car controller is further configured to identify the passenger's key bone joints from the point cloud information of the passenger's outer contour, and generate simplified skeleton features based on the key bone joints, wherein the key bone joints include the head, shoulders, arms, hips, knees and ankles.

[0009] In some embodiments, the carriage controller is further configured to determine whether the descent speed of the hip joint center exceeds a speed threshold, and / or determine whether the angle between the center line of the human body and the floor of the barrier-free toilet is less than an angle threshold. If so, the passenger's current state is abnormal, and an abnormal result information is sent to the passenger information system controller.

[0010] In some embodiments, the train barrier-free toilet passenger abnormal posture monitoring and alarm system also includes an in-vehicle communication device, and the passenger information system controller is further configured to simultaneously send alarm information to multiple in-vehicle communication devices via the Ethernet bus based on abnormal result information. When any in-vehicle communication device responds, a communication line is established between the corresponding in-vehicle communication device and the communication equipment in the abnormal barrier-free toilet, and the remaining in-vehicle communication devices remain on standby.

[0011] In some embodiments, when the carriage controller does not issue an abnormal result message, the communication device in the barrier-free toilet includes an SOS alarm button, and the communication device in the barrier-free toilet is further configured to operate the SOS alarm button, activate the communication device in the barrier-free toilet, actively connect to the passenger information system controller, and send a request signal to the passenger information system controller; the passenger information system controller is further configured to send an alarm message to the in-car communication device according to the request information.

[0012] In some embodiments, the carriage controller is further configured to, after receiving the alarm information and the passenger information system controller is connected to the communication device in the abnormal accessible toilet or the communication device in the accessible toilet that sends the request signal, sample, quantize and encode the communication content of the communication device in the abnormal accessible toilet or the communication device in the accessible toilet that sends the request signal, and generate and store audio data.

[0013] In some embodiments, the car controller is further configured to store point cloud information of the passenger's outline in real time when the door lock state is closed, and stop storing point cloud information of the passenger's outline when the door lock state changes from closed to open.

[0014] In some embodiments, the passenger information system controller sends a clock signal to the car controller, and the car controller records the storage time during the storage process according to the clock signal.

[0015] In some embodiments, the carriage controller stops calculation and analysis after the door lock state changes from closed to open.

[0016] Compared with related technologies, the train barrier-free toilet passenger abnormal posture monitoring and alarm system provided by the embodiment of the present application monitors the passenger posture in real time by analyzing the point cloud information of the passenger's external contour, determines whether the passenger is in an abnormal state, and then promptly alarms and communicates, solving the problem of existing technologies infringing on passenger privacy, and achieving efficient alarm after monitoring abnormal conditions to protect passengers.

[0017] The details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 2 is a schematic structural diagram of a system for monitoring and alarming abnormal postures of passengers in a barrier-free toilet on a train according to an embodiment of the present application; Figure 2 2. It is a structural diagram of a carriage controller in a train barrier-free toilet passenger abnormal posture monitoring and alarm system according to an embodiment of the present application; Figure 3 Flowchart of a method for monitoring and alarming abnormal posture of passengers in a barrier-free toilet on a train according to an embodiment of the present application; Figure 4 This is a structural diagram of the communication equipment in the train barrier-free toilet in the passenger abnormal posture monitoring and alarm system according to the embodiment of the present application.

[0019] In the picture: 101. Information acquisition module; 102. Carriage controller; 103. Passenger information system controller; 104. Communication equipment in the barrier-free toilet; 105. In-car communication device; 201. Posture calculation unit; 202. Storage unit; 203. Switch unit; 204. Audio encoding unit; 301. Microphone; 302. Speaker; 303. Main control unit. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is described and illustrated below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely used to explain this application and are not intended to limit this application. Based on the embodiments provided in this application, all other embodiments obtained by those of ordinary skill in the art without making any creative efforts are within the scope of protection of this application.

[0021] Obviously, the drawings described below are merely examples or embodiments of the present application. Those skilled in the art can, without inventive effort, apply the present application to other similar scenarios based on these drawings. Furthermore, it is also understood that, although the effort involved in such a development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, changes in design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as an insufficiency of the content disclosed in this application.

[0022] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments unless there is a conflict.

[0023] Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by persons of ordinary skill in the art to which this application belongs. The terms "a," "an," "an," "the," and similar expressions used herein do not denote quantitative limitations and may refer to either the singular or the plural. The terms "comprise," "include," "have," and any variations thereof, used herein, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or modules (units) is not limited to the listed steps or units but may also include steps or units not listed, or may include other steps or units inherent to the process, method, product, or apparatus. The terms "connected," "connected," "coupled," and similar expressions used herein are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. As used herein, "plurality" means two or more. "And / or" describes an association between associated objects, indicating that three possible relationships exist. For example, "A and / or B" may mean: A exists alone; A and B exist simultaneously; or B exists alone. The character " / " generally indicates that the objects before and after are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific order for the objects.

[0024] Currently, EMUs are equipped with accessible restrooms for passengers with disabilities. The spacious restrooms can accommodate the rotation of wheelchairs. The widened and reinforced toilets and handrails greatly facilitate the restroom needs of passengers with disabilities. The restrooms are also equipped with SOS alarm buttons, which provide a certain degree of convenience for passengers to call the police in the event of emergencies. Due to mobility difficulties or declining physical functions, passengers with disabilities are more likely to fall, faint, and other accidents when using the restroom. When passengers encounter unexpected situations and need to call the police for help, the SOS alarm button is only applicable to alarms initiated by the passengers. In the event that a passenger falls, faints, or is unable to initiate an alarm, the SOS alarm button is difficult to use, resulting in the passenger not being able to receive timely treatment, which can easily lead to serious incidents such as aggravated passenger injuries or service complaints.

[0025] Among the current fall detection products, millimeter-wave radar detection technology is the mainstream, with low development costs and high accuracy in fall detection. However, millimeter-wave radar has high penetrating power and can penetrate non-metallic materials such as clothing to reach the human body surface. The collected point cloud data contains human body surface information. For public places such as barrier-free toilets on EMUs, millimeter-wave radar detection technology has disadvantages such as infringing on passenger privacy.

[0026] With the increasing intelligence of EMUs and the continuous improvement of humanistic travel services, higher requirements are being placed on monitoring and alerting for unexpected passenger behavior in accessible restrooms. The challenge of accurately monitoring and determining a passenger's current status in real time, without infringing on their privacy, has become an urgent issue.

[0027] To solve the above problems, this embodiment provides a train barrier-free toilet passenger abnormal posture monitoring and alarm system, which is suitable for EMUs with multiple carriages. Figure 1 : is a structural diagram of a train barrier-free toilet passenger abnormal posture monitoring and alarm system according to an embodiment of the present application, such as Figure 1 As shown in the figure, the train barrier-free toilet passenger abnormal posture monitoring and alarm system includes: The information acquisition module 101 is provided in each barrier-free toilet and is configured to obtain the door lock status of the barrier-free toilet. When the door lock status is closed, the module acquires and sends point cloud information inside the barrier-free toilet.

[0028] The information acquisition module 101 includes a time of flight camera (Time of Flight Camera), which is located in the barrier-free toilet and is used to collect point cloud information in the barrier-free toilet and dry node signals of the barrier-free toilet door lock.

[0029] The barrier-free toilet door lock signal reflects the barrier-free toilet door lock status. When the barrier-free toilet door lock status is closed, the barrier-free toilet door lock dry node signal is a closed signal. When the barrier-free toilet door lock status is open, the barrier-free toilet door lock dry node signal is an unlocked signal.

[0030] Specifically, a time-of-flight camera continuously emits light pulses toward the object being observed, then receives the reflected light pulses. By measuring the time of flight of the light pulses, it generates a three-dimensional point cloud of information within the accessible restroom. Because light pulses are non-penetrating and do not penetrate clothing to directly scan the contours of a passenger's body, the point cloud captured by the time-of-flight camera only contains the basic outline of the passenger's body, ensuring privacy.

[0031] The carriage controller 102 is set in each carriage and is connected to the information acquisition module 101 in each toilet in the carriage via an Ethernet cable. It is configured to receive the point cloud information inside the barrier-free toilets in the carriage and extract the point cloud information of the passenger's outline from the point cloud information inside the barrier-free toilets. The skeleton features are simplified based on the point cloud information of the passenger's outline, and the passenger's skeleton point cloud coordinates, the descent speed of the hip joint center, the angle between the body centerline and the barrier-free toilet floor, and the height coordinates of the head and shoulder joints are calculated to analyze the passenger's current state. It is determined whether the passenger's current state is abnormal, and / or whether the passenger's skeleton point cloud coordinates have changed within a time threshold. If so, the passenger is in an abnormal state and an abnormal result information of the barrier-free toilet where the passenger is located is issued.

[0032] The car controller 102 is located in each car of the train set, and is used to analyze and detect the posture information of passengers in the accessible toilet of this car in real time, and store the passenger's point cloud information and voice information communicated with the passenger in real time.

[0033] The passenger information system controller 103 is connected to each car controller 102 via an Ethernet cable and a UIC568 ​​audio bus. It is configured to send an alarm message via the train Ethernet communication system after receiving abnormal result information, and connect to the communication equipment 104 in the abnormal barrier-free toilet through the car controller 102.

[0034] The communication device 104 in the barrier-free toilet is connected to the carriage controller 102 via an Ethernet cable.

[0035] The passenger information system controller 103 is located on the train and is used to summarize and record alarm events of the train's barrier-free toilets and to initiate and establish calls.

[0036] Communication equipment 104 in barrier-free toilets is provided in each barrier-free toilet, including an emergency intercom device.

[0037] After receiving the abnormal result information, the passenger information system controller 103 sends a clock signal and an alarm call trigger signal.

[0038] Through the cooperation of the information acquisition module 101, the carriage controller 102 and the passenger information system controller 103, automatic monitoring of the posture of passengers in the barrier-free toilets of the train is realized, which can timely detect abnormal conditions of passengers, avoid serious consequences caused by the failure to timely detect sudden conditions of passengers in the barrier-free toilets, and ensure the safety of passengers.

[0039] By combining with the Ethernet bus, alarm information can be quickly transmitted to relevant personnel, improving emergency response efficiency.

[0040] In some embodiments, the point cloud information of the interior of the barrier-free restroom includes initial environmental information and preliminary point cloud information. The information acquisition module 101 is further configured to acquire the initial environmental information of the interior of the barrier-free restroom before the barrier-free restroom is opened, and to acquire the preliminary point cloud information of the interior of the barrier-free restroom after the barrier-free restroom is opened and the door lock is closed. The carriage controller 102 is further configured to receive the initial environmental information and preliminary point cloud information, perform background filtering on the preliminary point cloud information based on the initial environmental information, and extract point cloud information of the passenger's outline.

[0041] By filtering out the background, the interference of fixed objects in the barrier-free toilet on the passenger point cloud information can be effectively eliminated, and the accuracy of the point cloud information extraction of the passenger's outline can be improved, thereby improving the reliability of subsequent posture judgment and reducing the probability of misjudgment.

[0042] Furthermore, the carriage controller 102 includes a posture calculation unit 201. The posture calculation unit 201 receives the point cloud information inside the barrier-free toilet and the barrier-free toilet door lock signal sent by the information acquisition module 101 via Ethernet.

[0043] Specifically, after the car controller 102 and the entire vehicle are powered on, the accessible restroom is not open. The posture calculation unit 201 acquires a frame of point cloud information of the accessible restroom environment as initial environmental information, which is used as a reference for background filtering of the preliminary point cloud information after the passenger enters the accessible restroom. When the information acquisition module 101 detects the accessible restroom door lock closing signal, it confirms that the passenger has entered the accessible restroom, activates the time-of-flight camera, and begins collecting preliminary point cloud information of the accessible restroom interior. Based on the initial accessible restroom environmental information acquired during power-on initialization, the preliminary point cloud information is filtered out of the background, and point cloud information of the passenger's outline is extracted from the preliminary point cloud information.

[0044] In some embodiments, the car controller 102 is further configured to identify key bone joints of the passenger from point cloud information of the passenger's outer contour, and generate simplified skeleton features based on the key bone joints, wherein the key bone joints include the head, shoulders, arms, hips, knees and ankles.

[0045] By identifying key bone joints and generating simplified skeleton features, passenger posture can be analyzed more intuitively and efficiently, reducing the amount of calculation and improving the speed and efficiency of posture analysis. At the same time, it provides a clear structural model for accurately calculating parameters such as the descent speed of the hip joint center and the angle between the body centerline and the ground.

[0046] In some embodiments, the carriage controller 102 is further configured to determine whether the descent speed of the hip joint center exceeds a speed threshold, and / or determine whether the angle between the center line of the human body and the floor of the barrier-free toilet is less than an angle threshold. If so, the passenger's current state is in an abnormal state, and an abnormal result information is sent to the passenger information system controller 103.

[0047] The speed threshold and angle threshold can be set manually according to actual needs.

[0048] By judging whether the descent speed of the hip joint center and the angle between the center line of the human body and the floor of the barrier-free toilet are normal, it is possible to promptly detect abnormal body parameters of passengers due to emergencies, avoid delays in rescue opportunities, further ensure passenger safety, and improve the accuracy and timeliness of the monitoring system's judgment of abnormal conditions.

[0049] Furthermore, the posture calculation unit 201 identifies key joints such as the head, shoulders, arms, hips, knees, and ankles based on the point cloud information of the passenger's outline, generates simplified skeletal features, and performs analysis and calculations. If the hip joint center descends too rapidly or the angle between the body's centerline and the ground is sharply angled, indicating a possible fall, abnormal passenger conditions can occur quickly and over a short period of time, necessitating prompt identification and reporting to ensure passenger safety.

[0050] When judging the passenger's status based on point cloud coordinates, the point cloud coordinates of the skeleton features are compared frame by frame, the length of time the point cloud coordinates of the passenger's skeleton features are still is accumulated and compared with the time threshold. If the time threshold is exceeded, it is judged as long-term stillness or long-term lying on the ground. The time thresholds for long-term lying on the ground and long-term stillness can be set manually.

[0051] When an abnormal body posture occurs, such as falling, lying on the ground for a long time or being unable to get up independently, being still for a long time or being in a coma, the posture calculation unit 201 will initiate an abnormal result report to the passenger information system controller 103.

[0052] Furthermore, the carriage controller 102 also includes a storage unit 202, which records the point cloud information containing the passenger's body posture into the storage unit 202 in combination with the clock signal issued by the passenger information system controller 103, so as to restore the passenger's abnormal posture during subsequent event tracing.

[0053] In some embodiments, such as Figure 1As shown, the train barrier-free toilet passenger abnormal posture monitoring and alarm system also includes an on-board communication device 105. The passenger information system controller 103 is further configured to simultaneously send alarm information to multiple on-board communication devices 105 via the Ethernet bus based on abnormal result information. When any on-board communication device 105 responds, a communication line is established between the corresponding on-board communication device 105 and the communication equipment 104 in the abnormal barrier-free toilet, and the remaining on-board communication devices 105 remain on standby.

[0054] This enables rapid multi-terminal transmission of alarm information, increasing the likelihood of staff responding to abnormal situations. By establishing a connection between a single response device and the bathroom communication equipment, communication stability and effectiveness are ensured, avoiding confusion caused by simultaneous connections of multiple devices and ensuring the orderly implementation of emergency rescue work.

[0055] The in-car communication device 105 is connected to the car controller 102 via an Ethernet cable.

[0056] The in-car communication device 105 is connected to the communication device 104 in the barrier-free toilet via the UIC568 ​​audio bus.

[0057] The crew can communicate with the passengers in the unexpected situation by voice through the in-car communication device 105 in the driver's cab or the crew's cab, so as to determine whether it is necessary to force open the door for rescue.

[0058] Furthermore, the car controller 102 also includes an audio encoding unit 204 .

[0059] The audio encoding unit 204 receives the alarm call audio signal through the UIC568 ​​audio bus, and receives the alarm call trigger signal and clock signal from the passenger information system controller 103 through Ethernet.

[0060] When it is detected that a passenger has fallen or suffered an accident in the barrier-free toilet, the passenger information system controller 103 triggers the emergency intercom device alarm call. After the alarm call is initiated, the analog audio signal of the call between the emergency intercom device in the abnormal barrier-free toilet and the in-vehicle communication device 105 is transmitted through the intercom branch of the UIC568 ​​audio bus. At the same time, after receiving the alarm trigger signal, the audio encoding unit 204 starts to sample, quantize and encode the analog audio signal of the intercom branch of the UIC568 ​​audio bus to form PCM audio data, and records the alarm call audio in combination with the received clock signal to the storage unit 202 for alarm call restoration during subsequent event tracing.

[0061] Furthermore, the car controller 102 also includes a switch unit 203. In the train accessible toilet passenger abnormal posture monitoring and alarm system, the car controllers 102 of adjacent cars are connected to the train Ethernet communication system through interconnection. The time-of-flight camera, passenger information system controller 103, emergency intercom device, and in-car communication device 105 are all connected to the train Ethernet communication system through the switch unit 203 of the car controller 102.

[0062] like Figure 2 As shown, the switching unit is connected to the posture calculation unit 201, the audio encoding unit 204 and the train Ethernet communication system via Ethernet cables.

[0063] The storage unit 202 is connected to the posture calculation unit 201 and the audio encoding unit 204 via SATA (Serial Advanced Technology Attachment).

[0064] The audio encoding unit 204 is connected to the passenger information system controller 103 via the UIC568 ​​audio bus.

[0065] The passenger information system controller 103, the carriage controller 102, the emergency intercom device and the in-car communication device 105 are also interconnected through the UIC568 ​​audio bus to realize the transmission of alarm call analog audio signals.

[0066] The carriage controller 102 provided in the carriage with the barrier-free toilet reports the abnormal passenger condition to the passenger information system controller 103 via the Ethernet protocol, which then summarizes and records the results.

[0067] The emergency intercom device alarm triggering and the call establishment with the in-car communication device 105 are all uniformly coordinated by the passenger information system controller 103 through the Ethernet protocol.

[0068] The passenger information system controller 103 sends a clock signal to all network devices in the train via the Ethernet protocol to ensure the clock synchronization of the passenger abnormal posture record of the posture calculation unit 201 of the carriage controller 102 and the alarm call audio record of the audio encoding unit 204.

[0069] In some embodiments, when the carriage controller 102 does not issue an abnormal result message, the barrier-free restroom communication device 104 includes an SOS alarm button. The barrier-free restroom communication device 104 is further configured to, upon operating the SOS alarm button, activate the barrier-free restroom communication device 104, actively connect to the passenger information system controller 103, and send a request signal to the passenger information system controller 103. The passenger information system controller 103 is further configured to send an alarm message to the in-car communication device 105 based on the request message.

[0070] Adding a function for passengers to actively seek help makes up for the limitations of the system's automatic monitoring, meets the needs of passengers in scenarios where there are no sudden abnormalities but they need help, enhances the passenger experience, and further improves the safety assurance system of train toilets.

[0071] The emergency intercom device installed in the barrier-free toilet is the same as the emergency intercom device installed in the passenger compartment. Figure 4 As shown, the emergency intercom device includes a microphone 301, a speaker 302 and a main control unit 303. The microphone 301 and the speaker 302 are used for intercom calls and communicate with the outside world via the UIC568 ​​audio bus. The main control unit 303 is connected to the outside world via Ethernet and is connected to the external SOS alarm button dry node signal.

[0072] The operating modes of the emergency intercom device include active alarm mode and automatic alarm mode.

[0073] The active alarm mode includes: when the emergency intercom device detects that the SOS alarm button dry node is closed, it sends it to the passenger information system controller 103 through the network protocol, and the passenger information controller then returns the alarm trigger instruction through the network protocol. The emergency intercom device in the barrier-free toilet that detects the closure of the SOS alarm button dry node turns on the microphone 301 and the speaker 302, and opens the intercom branch line of the UIC568 ​​audio bus for sending and receiving intercom audio signals.

[0074] The automatic alarm mode includes: when the car controller 102 monitors through the time-of-flight camera that a passenger is in an abnormal posture such as falling, lying on the ground for a long time, or staying still for a long time, the passenger information system controller 103 receives the abnormal passenger condition reported by the car controller 102, and the passenger information system controller 103 directly sends an alarm trigger instruction to the emergency intercom device through the network protocol. The emergency intercom device in the abnormal barrier-free toilet turns on the microphone 301 and the speaker 302, and opens the intercom branch line of the UIC568 ​​audio bus for sending and receiving intercom audio signals.

[0075] When lying on the ground for a long time, the passenger is unable to stand up on his own. When staying still for a long time, the passenger is in a coma.

[0076] On-board communication devices 105 are installed in the train's driver's cab and crew compartment. When the passenger information system controller 103 issues an alarm trigger command to the emergency intercom, it simultaneously sends an alarm trigger command to multiple on-board communication devices 105 in the driver's cab and crew compartment. These devices 105 simultaneously sound an alarm. When a crew member answers the call on one on-board communication device 105, the other on-board communication devices 105 return to standby mode. After answering the call, the crew member establishes an alarm call with the emergency intercom device in the abnormally accessible restroom via the UIC568 ​​audio bus. Based on communication with the passenger in the unexpected situation, the crew member determines whether to take measures such as forcibly opening the door to provide assistance.

[0077] In some embodiments, the carriage controller 102 is further configured to, after receiving the alarm information and the passenger information system controller 103 is connected to the abnormal barrier-free toilet communication device 104 or the barrier-free toilet communication device 104 that sends a request signal, sample, quantize and encode the communication content of the abnormal barrier-free toilet communication device 104 or the barrier-free toilet communication device 104 that sends a request signal, and generate and store audio data.

[0078] Record and store communication content to provide audio evidence for subsequent accident investigations and liability determination. Recording storage time provides audio data with temporal information, facilitating accurate reconstruction of the incident process and improving the accuracy and fairness of incident handling.

[0079] In some embodiments, the carriage controller 102 is further configured to store point cloud information of the passenger's outline in real time when the door lock state is closed, and stop storing point cloud information of the passenger's outline when the door lock state changes from closed to open.

[0080] Saving point cloud information of passengers in abnormal conditions provides technical support for analyzing the causes of abnormalities and improving monitoring algorithms. Combined with the storage time, this information can be used to analyze the time course of abnormalities, providing a more comprehensive understanding of abnormal events and improving the optimization space and practicality of the monitoring system.

[0081] In some embodiments, the passenger information system controller 103 sends a clock signal to the car controller 102, and the car controller 102 records the storage time during the storage process according to the clock signal.

[0082] Further unify the time base so that different types of stored data have accurate time tags, which will facilitate the subsequent orderly management, query and analysis of the data, and improve the availability of data and the accuracy of event tracing.

[0083] In some embodiments, the carriage controller 102 stops calculation and analysis after the door lock state changes from closed to open.

[0084] Rationally utilize computing resources to avoid ineffective calculations when no one is using the accessible restroom, reduce system power consumption, extend equipment life, and improve system operating efficiency, so that system resources can be concentrated on effective monitoring when someone is using the restroom.

[0085] Specifically, after receiving the toilet door unlocking signal, the posture calculation unit 201 ends the analysis and calculation of the passenger's body posture.

[0086] This application also provides a method for monitoring and alarming abnormal postures of passengers in barrier-free toilets on trains, such as Figure 3 As shown, the abnormal posture monitoring and alarm method for passengers in the barrier-free toilet on the train is as follows: Collect the initial environmental information inside the barrier-free toilet on the train and detect the dry node signal of the barrier-free toilet door lock in real time.

[0087] If a door lock closing signal is received, it is confirmed that the passenger has entered the barrier-free restroom. The point cloud information is calculated frame by frame. Through the initial environmental information, the barrier-free restroom environmental background is filtered out and the point cloud information of the passenger's outline is extracted.

[0088] Based on the point cloud information of the passenger's outline, the passenger's key bone joints are identified and the passenger's simplified skeleton features are established.

[0089] The system calculates and analyzes the simplified skeletal features of the passenger to identify whether the passenger has fallen, been lying on the ground for a long time, or is in a coma. If so, an abnormal alarm is issued and point cloud data containing the passenger's posture is recorded. If not, the system continues to monitor the passenger's posture changes.

[0090] After receiving the door lock unlocking signal, the monitoring ends.

[0091] In actual use, before the EMU officially enters operation, it stops in the garage to be powered up. During this time, the accessible restroom remains closed, and the car controller 102 and the time-of-flight camera are activated. The car controller 102 saves the first frame of point cloud information captured by the time-of-flight camera. This first frame of point cloud information serves as the initial environmental information for this EMU operation, used to filter out environmental background data for subsequent passenger posture monitoring. After the EMU arrives at the platform, passengers begin boarding. Subsequently, a disabled or elderly passenger with mobility impairments enters the accessible restroom to use the restroom and closes the door lock. Upon receiving the lock closure signal, the car controller 102 calculates and analyzes the point cloud information from the time-of-flight camera to initiate real-time passenger posture monitoring and localize the point cloud information.

[0092] If the carriage controller 102 finds that the descending speed of the hip joint center is too large or the angle between the center line of the human body and the ground is obviously acute by monitoring the simplified passenger skeleton characteristics, the carriage controller 102 determines that the passenger has fallen, and starts timing from the moment of the fall. Within the time threshold, if the angle between the center line of the human body and the ground is still obviously acute or the height coordinates of the bone joints of the head and shoulders are in a low state, the carriage controller 102 determines that the passenger has fallen and is unable to get up on his own, and reports this situation to the passenger information system controller 103. The passenger information system controller 103 triggers the emergency intercom device in the barrier-free toilet to alarm, and the in-car communication devices 105 in the driver's cab and the crew room simultaneously issue an alarm prompt sound. The in-car communication device 105 that answers the call first will establish an intercom call with the emergency intercom device in the abnormal barrier-free toilet, and the other in-car communication devices 105 will return to standby mode. After the crew and the passenger communicate by voice, they will comprehensively judge whether to take measures such as forcibly opening the door to rescue.

[0093] If the car controller 102 compares the point cloud coordinates of the passenger skeleton frame by frame, and the simplified point cloud coordinates of the passenger skeleton remain unchanged within a preset time, the car controller 102 determines that the passenger has been in a long-term state of being in a coma, and reports this situation to the passenger information system controller 103. The passenger information system controller 103 triggers the emergency intercom device in the barrier-free toilet to alarm, and the in-car communication devices 105 in the driver's cab and the crew room simultaneously issue an alarm prompt sound. The in-car communication device 105 that answers the call first establishes an intercom call with the emergency intercom device in the abnormal toilet, and the other in-car communication devices 105 return to standby mode. Because the passenger is in a coma, if the crew cannot get a voice response from the passenger, they will make a comprehensive judgment based on the actual situation on whether to take measures such as forcibly opening the door to rescue.

[0094] If the carriage controller 102 does not detect any abnormality, the passenger presses the SOS alarm button on his own, and the emergency intercom device initiates an alarm request signal to the passenger information system. The passenger information system controller 103 triggers the emergency intercom device in the barrier-free toilet to alarm, and the in-car communication devices 105 in the driver's cab and the crew room send out alarm prompt sounds at the same time. The in-car communication device 105 that answers the call first establishes an intercom call with the emergency intercom device in the toilet that initiated the alarm request signal, and the other in-car communication devices 105 return to standby mode. After the crew and the passenger communicate by voice, they comprehensively judge whether to take measures such as forcibly opening the door to rescue.

[0095] After a passenger accident occurs, if the passenger or family members have objections to the occurrence of the passenger accident or the communication and treatment of the crew, the continuous point cloud data of the passenger's body posture changes after entering the accessible toilet and the recorded data of the alarm call stored in the car controller 102 can be copied, and a professional player can be used to perform a three-dimensional graphical restoration of the point cloud data of the passenger's body posture and the audio restoration of the alarm call. Through data restoration, the responsibility for the accident can be clarified and the occurrence of service disputes can be reduced.

[0096] It should be noted that the above modules can be functional modules or program modules, and can be implemented through software or hardware. For modules implemented through hardware, the above modules can be located in the same processor; or the above modules can be located in different processors in any combination.

[0097] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0098] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A train barrier-free toilet passenger abnormal posture monitoring and alarm system, characterized by: include: An information acquisition module is provided in the barrier-free toilet of the train and is configured to obtain the door lock status of the barrier-free toilet and, when the door lock status is closed, obtain and send point cloud information inside the barrier-free toilet; A carriage controller is provided in each carriage and connected to the information acquisition modules in each barrier-free restroom in the carriage in which it is located, and is configured to receive point cloud information from the interior of each barrier-free restroom in the carriage in which it is located, and extract point cloud information of the passenger's external contour from the point cloud information inside the barrier-free restroom; simplify skeleton features based on the point cloud information of the passenger's external contour, calculate the passenger's skeleton point cloud coordinates, the descent speed of the hip joint center, the angle between the body centerline and the barrier-free restroom floor, and the height coordinates of the head and shoulder joints, and analyze the passenger's current state; determine whether the passenger's current state is abnormal, and / or determine whether the passenger's skeleton point cloud coordinates have changed within a time threshold. If so, the passenger is in an abnormal state, and abnormal result information about the barrier-free restroom where the passenger is located is issued; The passenger information system controller is connected to each carriage controller and is configured to send out an alarm message via the Ethernet bus after receiving abnormal result information, and connect to the communication equipment in the abnormal barrier-free toilet.

2. The train barrier-free toilet passenger abnormal posture monitoring and alarm system according to claim 1 is characterized in that: The point cloud information inside the barrier-free toilet includes initial environmental information and preliminary point cloud information. The information acquisition module is further configured to obtain the initial environmental information inside the barrier-free toilet before the barrier-free toilet is opened, and to obtain the preliminary point cloud information inside the barrier-free toilet after the barrier-free toilet is opened and the door lock is closed. The car controller is further configured to receive the initial environmental information and preliminary point cloud information, perform background filtering on the preliminary point cloud information based on the initial environmental information, and extract point cloud information of the passenger's outline.

3. The train barrier-free toilet passenger abnormal posture monitoring and alarm system according to claim 1 is characterized in that: The car controller is further configured to identify the passenger's key bone joints from the point cloud information of the passenger's outer contour and generate simplified skeleton features based on the key bone joints, wherein the key bone joints include the head, shoulders, arms, hips, knees and ankles.

4. The train barrier-free toilet passenger abnormal posture monitoring and alarm system according to claim 1 or 3 is characterized in that: The carriage controller is further configured to determine whether the descending speed of the hip joint center exceeds a speed threshold, and / or determine whether the angle between the center line of the human body and the floor of the barrier-free toilet is less than an angle threshold. If so, the passenger's current state is in an abnormal state, and an abnormal result information is sent to the passenger information system controller.

5. The train barrier-free toilet passenger abnormal posture monitoring and alarm system according to claim 1 is characterized in that: The system also includes an in-vehicle communication device, and the passenger information system controller is further configured to simultaneously send alarm information to multiple in-vehicle communication devices via the Ethernet bus based on abnormal result information. When any in-vehicle communication device responds, a communication line is established between the corresponding in-vehicle communication device and the communication equipment in the abnormal barrier-free toilet, and the remaining in-vehicle communication devices remain on standby.

6. The train barrier-free toilet passenger abnormal posture monitoring and alarm system according to claim 5 is characterized in that: When the carriage controller does not issue any abnormal result information, the communication equipment in the barrier-free toilet includes an SOS alarm button, and the communication equipment in the barrier-free toilet is further configured to operate the SOS alarm button, activate the communication equipment in the barrier-free toilet, actively connect to the passenger information system controller, and send a request signal to the passenger information system controller; the passenger information system controller is further configured to send an alarm message to the in-car communication device according to the request information.

7. The train barrier-free toilet passenger abnormal posture monitoring and alarm system according to claim 5 or 6, characterized in that: The carriage controller is further configured to, after receiving the alarm information and the passenger information system controller is connected to the communication device in the abnormal barrier-free toilet or the communication device in the barrier-free toilet that sends a request signal, sample, quantize and encode the communication content of the communication device in the abnormal barrier-free toilet or the communication device in the barrier-free toilet that sends a request signal, and generate and store audio data.

8. The train barrier-free toilet passenger abnormal posture monitoring and alarm system according to claim 1 is characterized in that: The carriage controller is further configured to store point cloud information of the passenger's outline in real time when the door lock state is closed, and stop storing point cloud information of the passenger's outline when the door lock state changes from closed to open.

9. The train barrier-free toilet passenger abnormal posture monitoring and alarm system according to claim 7 or 8, characterized in that: The passenger information system controller sends a clock signal to the carriage controller, and the carriage controller records the storage time during the storage process according to the clock signal.

10. The train barrier-free toilet passenger abnormal posture monitoring and alarm system according to claim 1 is characterized in that: After the door lock state changes from closed to open, the car controller stops calculation and analysis.

Images