A device for detecting thermal events in shipborne new energy vehicles

Abstract

This utility model discloses a device for detecting thermal events in shipborne new energy vehicles, comprising: a headlight flicker detection sub-device, an alarm horn detection sub-device, and a new energy vehicle thermal event alarm sub-device; a camera group is deployed to ensure the acquisition of video images of all new energy vehicles; a headlight flicker detector detects headlight flicker events, avoiding misjudgments due to human negligence or fatigue; a microphone group is responsible for collecting sound from inside the vehicle compartment of the roll-on / roll-off ship; an audio signal classification and recognition device automatically identifies whether the audio data contains a car horn event; a signal superposition device superimposes the high-level signals detected by the headlight flicker detector and the audio signal classifier, and a thermal event judge determines whether a new energy vehicle thermal event has occurred based on the superimposed voltage signal, thereby significantly improving the objectivity and reliability of vehicle thermal event determination.

Description

Technical Field

[0001] This utility model relates to the field of ship safety monitoring technology, and in particular to a device for detecting thermal events in shipborne new energy vehicles. Background Technology

[0002] In recent years, the country has vigorously developed the new energy vehicle industry, and the production volume and market share of new energy vehicles have been increasing year by year. Shipping is an important carrier of public transportation services; ferries and car carriers (PCTCs) transport new energy vehicles across rivers and seas, while PCTCs transport these vehicles overseas. Consequently, the safety risks associated with the transportation of new energy vehicles and their power batteries have become increasingly prominent. Thermal runaway fires involving new energy vehicle power batteries are difficult to extinguish even on land, and are even more challenging during ship transport. In recent years, several car carriers abroad have experienced fires caused by thermal runaway of lithium batteries in new energy vehicles, resulting in the destruction of thousands of vehicles on board and endangering the lives of those on board.

[0003] According to GB 38031-2020 "Safety Requirements for Power Batteries for Electric Vehicles", thermal runaway occupant protection analysis and verification states: "The battery pack or system should provide a thermal event alarm signal (serving the vehicle-wide thermal event alarm, reminding occupants to evacuate) 5 minutes before thermal runaway of a single battery causes thermal runaway and subsequently leads to a hazard in the occupant compartment." The vehicle-wide thermal event alarm typically includes audible and visual alarms, namely, flashing headlights and / or horn alarms observed from outside the vehicle.

[0004] The 5-minute thermal event alarm for the battery pack of new energy vehicles is crucial for the escape of occupants and can also serve as a basis for early detection of thermal runaway accidents in new energy vehicles during roll-on / roll-off transport.

[0005] In the scenario of ferries carrying new energy vehicles, the number of new energy vehicles is small (from a dozen to a hundred or so). Currently, relying on manual inspections and manual review of CCTV video surveillance systems to observe vehicle anomalies is labor-intensive and prone to missed inspections. In the scenario of car carriers carrying new energy vehicles, the total number of crew members is limited (from a dozen to twenty or so), the number of vehicle decks is large (from several to a dozen), and the number of new energy vehicles is huge (from hundreds to thousands). Relying on manual inspections and manual review of CCTV video surveillance systems cannot achieve full coverage and cannot detect vehicle anomalies in a timely manner.

[0006] In view of this, there is an urgent need for a device for detecting and alarming thermal events in shipborne new energy vehicles. This device can be used to automatically inspect and accurately detect thermal events in the power batteries of new energy vehicles during the transportation of new energy vehicles by ship and issue alarms, so as to gain an early advantage in detecting and extinguishing thermal runaway fire accidents in new energy vehicles. Summary of the Invention

[0007] To address the technical problem that existing technologies cannot automatically detect and alarm for thermal events in the power batteries of shipborne new energy vehicles and rely on manual inspections, this invention proposes a device for detecting and alarming thermal events in shipborne new energy vehicles, enabling automatic inspection and accurate monitoring of thermal events in new energy vehicles.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A device for detecting thermal events in marine-borne new energy vehicles includes: a headlight flicker detection sub-device, a horn alarm detection sub-device, and a new energy vehicle thermal event alarm sub-device; the headlight flicker detection sub-device and the horn alarm detection sub-device are electrically connected to the new energy vehicle thermal event alarm sub-device, respectively.

[0010] The vehicle headlight flicker detection sub-device includes: a camera group, a video data receiver electrically connected to the camera group, and a vehicle headlight flicker detector electrically connected to the video data receiver;

[0011] The horn alarm detection sub-device includes: a pickup group, an audio signal receiver connected to the pickup group, and an audio signal classification and recognition device connected to the audio signal receiver;

[0012] The new energy vehicle thermal event alarm sub-device includes: a vehicle thermal event detector and an alarm connected to the vehicle thermal event detector.

[0013] Preferably, the vehicle headlight flicker detector includes:

[0014] A video data processor, connected to the video data receiver, transmits the brightness signals of the front and rear of the car in the current frame to the brightness comparison circuit.

[0015] The brightness comparison circuit inputs the brightness signals of the front and rear of the vehicle in the current frame and the brightness signal of the previous frame into the comparator. When the difference between the two exceeds the preset brightness threshold, the comparator outputs a high-level signal.

[0016] A counting circuit, which is connected to a brightness comparison circuit, generates a counting signal based on the signal output by the brightness comparison circuit for the change of the vehicle lights from off to on or from on to off.

[0017] The threshold setting circuit is used to preset the threshold for strobe counting, and the threshold voltage is changed by adjusting the resistance of the potentiometer.

[0018] The judgment output circuit compares the counting signal of the counting circuit with the threshold set by the threshold setting circuit through a comparator. When the counting signal exceeds the threshold, the judgment output circuit outputs a high-level signal, indicating that a car headlight flickering event has been detected. The high-level signal output by the judgment output circuit is then transmitted to the new energy vehicle thermal event alarm sub-device.

[0019] Preferably, the camera group includes at least one of a digital camera and an analog camera.

[0020] Preferably, the microphone array collects audio signals from inside the vehicle compartment of the roll-on / roll-off ship; the audio signal receiver is responsible for receiving the audio signals collected by the microphone array and transmitting the audio signals from each microphone to the audio signal classification and recognition device; when the audio signal classification and recognition device outputs a high-level signal to the new energy vehicle thermal event alarm sub-device, a car horn blasting event occurs.

[0021] Preferably, the microphone group includes at least one of the following: an analog microphone, a digital microphone, and a combination of a camera and a microphone.

[0022] Preferably, the vehicle thermal event detector includes:

[0023] The signal superimposition device superimposes the high-level signal output by the headlight flicker detection sub-device and the high-level signal output by the horn alarm detection sub-device to generate a superimposed voltage signal.

[0024] The threshold setting circuit changes the threshold voltage by adjusting the resistance of the potentiometer;

[0025] The comparator compares the superimposed voltage signal output by the signal superimposed circuit with the threshold voltage set by the threshold setting circuit. If the superimposed voltage signal exceeds the threshold voltage, an alert signal is sent to the alarm.

[0026] Preferably, when the alarm receives the reminder signal from the vehicle thermal event detector, it sends an alarm message to the user.

[0027] Beneficial effects:

[0028] This invention is applied to fire prevention and control of new energy vehicles transported on ships. It can automatically inspect and accurately detect thermal event alarms of new energy vehicle power batteries, reduce the labor intensity of vehicle cabin inspection personnel and video monitoring system monitoring personnel, and avoid missed detections due to negligence of inspection and monitoring personnel.

[0029] By deploying a camera array, we can ensure that all parking spaces are captured and that video images of all new energy vehicles inside the vehicle compartment of the roll-on / roll-off ship are collected. At the same time, the camera array can utilize the existing CCTV video surveillance system in the vehicle compartment of the ship. If there are video blind spots, only a few cameras need to be added, which helps to reduce deployment costs.

[0030] Meanwhile, the video data processor in the headlight flicker detector can obtain the brightness values ​​of the front and rear of the vehicle in each frame of video. The brightness comparison circuit compares the brightness values ​​of the front and rear of the vehicle in the current frame with the brightness values ​​of the previous frame. The counting circuit is connected to the brightness comparison circuit. When the brightness comparison circuit detects that the headlight changes from off to on or from on to off, the count value of the counting circuit is incremented by 1. When the flicker counter value exceeds the preset threshold, the judgment output circuit outputs the detection result. This realizes automatic judgment of detecting a car headlight flicker event, avoids misjudgment caused by human negligence or fatigue, and improves the accuracy and consistency of judgment.

[0031] The microphone array is responsible for collecting the sound inside the vehicle compartment of the roll-on / roll-off ship; the audio signal receiver is responsible for receiving the audio collected by all microphones and can push the audio data of each microphone to the audio signal classifier; the audio signal classifier processes and analyzes the audio data to automatically determine whether the audio data contains car horn events, improving the accuracy, timeliness and consistency of the judgment.

[0032] The high-level signals output from the headlight flicker detector and the audio signal classifier are superimposed by a signal superimposed unit in the vehicle thermal event detector. The thermal event detector then uses this superimposed voltage signal to determine if a thermal event has occurred in the new energy vehicle. When a thermal event is detected, an alarm is promptly sent, and on-duty personnel are dispatched to the scene for verification and handling. This achieves automatic inspection and accurate detection of thermal event alarms in the power battery of new energy vehicles, providing a crucial early warning and control for preventing thermal runaway fires. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of a device for detecting thermal events in shipborne new energy vehicles.

[0034] Figure 2 This is a schematic diagram of a camera deployed in a single-deck vehicle compartment.

[0035] Figure 3 Diagram showing the deployment of microphones in a single-deck vehicle compartment. Detailed Implementation

[0036] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0037] like Figure 1 As shown, this solution provides a device for detecting thermal events in shipborne new energy vehicles, comprising: a headlight flicker detection sub-device, a horn alarm detection sub-device, and a new energy vehicle thermal event alarm sub-device.

[0038] Preferably, the headlight flicker detection sub-device includes: a camera group, a video data receiver electrically connected to the camera group, and a headlight flicker detector electrically connected to the video data receiver;

[0039] Specifically, the camera group can utilize the camera resources in the vehicle compartment of the ship's existing CCTV video surveillance system; for existing monitoring blind spots, additional cameras can be installed. A schematic diagram of the camera group deployment in the single-deck vehicle compartment is shown below. Figure 2 As shown, the camera array needs to be able to monitor all vehicles inside the vehicle compartment from all angles; in this case, the camera is not limited to digital cameras but can also be an analog camera.

[0040] Specifically, the video data receiver is responsible for receiving video streams from all cameras and can push the video stream from each camera to the headlight flicker detector.

[0041] Preferably, the vehicle headlight flicker detector includes:

[0042] A video data processor, connected to the video data receiver, transmits the brightness signals of the front and rear of the vehicle in the current frame to a brightness comparison circuit.

[0043] The brightness comparison circuit inputs the brightness signals of the front and rear of the vehicle in the current frame and the brightness signal of the previous frame into the comparator. When the difference between the two exceeds the preset brightness threshold, the comparator outputs a high-level signal.

[0044] A counting circuit, which is connected to a brightness comparison circuit, generates a counting signal based on the signal output by the brightness comparison circuit for the change of the vehicle lights from off to on or from on to off.

[0045] The threshold setting circuit is used to preset the threshold for strobe counting, and the threshold voltage is changed by adjusting the resistance of the potentiometer.

[0046] The judgment output circuit compares the counting signal of the counting circuit with the threshold set by the threshold setting circuit through a comparator. When the counting signal exceeds the threshold, the judgment output circuit outputs a high-level signal, indicating that a car headlight flickering event has been detected. The high-level signal output by the judgment output circuit is then transmitted to the new energy vehicle thermal event alarm sub-device.

[0047] Preferably, the horn alarm detection sub-device includes: a pickup group, an audio signal receiver connected to the pickup group, and an audio signal classification and recognition device connected to the audio signal receiver;

[0048] Preferably, several microphones in the microphone group are responsible for collecting audio signals inside the vehicle compartment of the roll-on / roll-off ship. A schematic diagram of the microphone group's deployment in the single-deck vehicle compartment is shown below. Figure 3 As shown; in this case, the microphone is not limited to an analog microphone, but can also be a digital microphone, or a combination of a camera and a microphone.

[0049] Preferably, the audio signal receiver is responsible for receiving the audio signals collected by the microphone group and transmitting the audio signals of each microphone to the audio signal classification and recognition device; when the audio signal classification and recognition device outputs a high-level signal to the new energy vehicle thermal event alarm sub-device, a car horn blasting event occurs.

[0050] Preferably, the new energy vehicle thermal event alarm sub-device includes: a vehicle thermal event detector and an alarm connected to the vehicle thermal event detector.

[0051] Preferably, the vehicle thermal event detector includes:

[0052] The signal superimposition device superimposes the high-level signal output by the headlight flicker detection sub-device and the high-level signal output by the horn alarm detection sub-device to generate a superimposed voltage signal.

[0053] The threshold setting circuit changes the threshold voltage by adjusting the resistance of the potentiometer;

[0054] The comparator compares the superimposed voltage signal output by the signal superimposed circuit with the threshold voltage set by the threshold setting circuit. If the superimposed voltage signal exceeds the threshold voltage, an alert signal is sent to the alarm.

[0055] Preferably, when the alarm receives the alert signal from the vehicle thermal event detector, it sends an alarm message to the user.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A device for detecting thermal events in shipborne new energy vehicles, characterized in that, include: Vehicle headlight flicker detection sub-device, horn alarm detection sub-device, and new energy vehicle thermal event alarm sub-device; The headlight flicker detection sub-device and the horn alarm detection sub-device are respectively electrically connected to the new energy vehicle thermal event alarm sub-device. The vehicle headlight flicker detection sub-device includes: a camera group, a video data receiver electrically connected to the camera group, and a vehicle headlight flicker detector electrically connected to the video data receiver; The horn alarm detection sub-device includes: a pickup group, an audio signal receiver connected to the pickup group, and an audio signal classification and recognition device connected to the audio signal receiver; The new energy vehicle thermal event alarm sub-device includes: a vehicle thermal event detector and an alarm connected to the vehicle thermal event detector.

2. The device for detecting thermal events in shipborne new energy vehicles as described in claim 1, characterized in that, The vehicle headlight flicker detector includes: A video data processor, connected to the video data receiver, transmits the brightness signals of the front and rear of the car in the current frame to the brightness comparison circuit. The brightness comparison circuit inputs the brightness signals of the front and rear of the vehicle in the current frame and the brightness signal of the previous frame into the comparator. When the difference between the two exceeds the preset brightness threshold, the comparator outputs a high-level signal. A counting circuit, which is connected to a brightness comparison circuit, generates a counting signal based on the signal output by the brightness comparison circuit for the change of the vehicle lights from off to on or from on to off. The threshold setting circuit is used to preset the threshold for strobe counting, and the threshold voltage is changed by adjusting the resistance of the potentiometer. The judgment output circuit compares the counting signal of the counting circuit with the threshold set by the threshold setting circuit through a comparator. When the counting signal exceeds the threshold, the judgment output circuit outputs a high-level signal, indicating that a car headlight flickering event has been detected. The high-level signal output by the judgment output circuit is then transmitted to the new energy vehicle thermal event alarm sub-device.

3. The device for detecting thermal events in shipborne new energy vehicles as described in claim 1 or 2, characterized in that, The camera group includes at least one of a digital camera and an analog camera.

4. The device for detecting thermal events in shipborne new energy vehicles as described in claim 1, characterized in that, The microphone array collects audio signals from inside the vehicle compartment of the roll-on / roll-off ship; the audio signal receiver is responsible for receiving the audio signals collected by the microphone array and transmitting the audio signals from each microphone to the audio signal classification and recognition device; when the audio signal classification and recognition device outputs a high-level signal to the new energy vehicle thermal event alarm sub-device, a car horn blasting event occurs.

5. A device for detecting thermal events in shipborne new energy vehicles as described in claim 1 or 4, characterized in that, The microphone group includes at least one of the following: analog microphone, digital microphone, and a combination of camera and microphone.

6. The device for detecting thermal events in shipborne new energy vehicles as described in claim 1, characterized in that, The vehicle thermal event detector includes: The signal superimposition device superimposes the high-level signal output by the headlight flicker detection sub-device and the high-level signal output by the horn alarm detection sub-device to generate a superimposed voltage signal. The threshold setting circuit changes the threshold voltage by adjusting the resistance of the potentiometer; The comparator compares the superimposed voltage signal output by the signal superimposed circuit with the threshold voltage set by the threshold setting circuit. If the superimposed voltage signal exceeds the threshold voltage, an alert signal is sent to the alarm.

7. The device for detecting thermal events in shipborne new energy vehicles as described in claim 1, characterized in that, The alarm receives a notification signal from the vehicle thermal event detector.

Images