Load detection and notification system and method for vehicle rooftops

Abstract

The present disclosure relates to a load detection and notification system (100) and a method (200) for a vehicle rooftop, configured to monitor and detect the loss, displacement, or deviation of luggage or cargo loaded on the rooftop during vehicle operation. The system (100) includes a plurality of load cells (101) integrated within the vehicle roof (105) to measure loads (l1, l2, l3) applied to the rooftop and generate corresponding electrical signals, an amplification module (103) to amplify and digitize the signals, and a microcontroller (104) programmed with processing rules and deviation (deviation) detection rules. Additionally, at least one accelerometer is included to measure the acceleration, inclination, and vibration of the vehicle, thereby enabling correction of the vehicle's dynamic behavior during load analysis. When a continuous load deviation exceeds a predefined threshold, a notification mechanism is activated to provide a visual, auditory, or remote notification. The system (100) may additionally include a surround view monitor or an external camera for visual verification. The system (100) provides real-time, reliable, and retrofittable rooftop load monitoring to improve vehicle safety and prevent cargo loss.

Description

Technology Field

[0001] The present invention relates to the field of vehicle safety. More specifically, it relates to load detection and notification for vehicle rooftops. Background Technology

[0002] definition

[0003] The following terms used in the present invention are intended to have the meanings generally defined below, except where the context requires a different interpretation.

[0004] Load Cell A "load cell" refers to an electromechanical sensor used to measure force or weight. Load cells operate by converting applied mechanical force into an electrical signal. Since the generated signal is proportional to the applied force or weight, precise measurements are possible. In practical applications, load cells are used in scales, monitoring systems, and various industrial and automotive environments to accurately measure loads.

[0005] HUD (Heads-Up Display): A "Head-Up Display (HUD)" refers to a visual interface system that projects key information, such as warnings, navigation data, or system status, onto a transparent surface within the driver's line of sight. This enhances safety and convenience by allowing drivers to access necessary information without taking their eyes off the road ahead. HUDs are commonly used in modern vehicles and aviation.

[0006] SVM (Surround View Monitor): "Surround View Monitor (SVM)" refers to a camera-based system that provides a 360-degree top-down view of the vehicle's surroundings. It uses multiple cameras positioned around the vehicle to generate composite images displayed on the vehicle's infotainment screen. SVM systems are primarily used for parking assistance, obstacle detection, and safety assurance in narrow or congested spaces.

[0007] Arduino: "Arduino" refers to an open-source electronic platform based on easy-to-use hardware and software. It consists of microcontroller boards that can be programmed to perform specific tasks by writing and uploading code using the Arduino Integrated Development Environment (IDE). Arduino boards are widely used for prototyping and developing electronic systems due to their simplicity, affordability, and versatility. Arduino boards are primarily adopted in applications such as robotics, IoT devices, sensor-based projects, and automation systems, enabling users to interact with physical components such as sensors, motors, and displays.

[0008] This definition is an addition to the definitions commonly used in the relevant technical field.

[0009] Background Technology

[0010] The following background information relates to the present invention but is not necessarily prior art.

[0011] Current vehicle security systems are often limited to GPS-based location tracking or vehicle immobilization; while useful, these methods lack the ability to identify unauthorized users in real time and provide effective evidence to investigative agencies. These limitations delay vehicle recovery efforts and reduce the likelihood of apprehending perpetrators.

[0012] Traditional stolen vehicle tracking (SVT) systems rely on tracking the vehicle's location but do not address occupant identification functions. Meanwhile, recent interior cameras are adopted in driver monitoring systems (DMS) that focus primarily on detecting fatigue, distraction, or other safety issues. While these cameras are effective in ensuring driver and passenger safety, they are not configured to respond to theft scenarios or provide evidence of unauthorized entry.

[0013] Additionally, existing systems often lack integrated intelligence to detect abnormal behaviors, such as unauthorized entry, abnormal driving attempts, or irregular vehicle usage. Furthermore, there is a absence of mechanisms to proactively alert relevant agencies by utilizing visual evidence from within the vehicle. If visual verification of vehicle occupants or their activities is not achieved, vehicle recovery efforts are hindered, creating gaps in the overall vehicle security framework.

[0014] Therefore, a load detection and notification system and method for a vehicle rooftop capable of resolving the aforementioned disadvantages are required. The problem to be solved

[0015] Some of the objectives of the present invention satisfied by at least one embodiment of the present specification are as follows.

[0016] The objective of the present invention is to improve one or more problems of the prior art or at least provide a useful alternative.

[0017] The objective of the present invention is to provide a load detection and notification system and method for a vehicle rooftop.

[0018] Another objective of the present invention is to provide a system that improves user safety by providing immediate notification of significant changes in monitored conditions.

[0019] Another objective of the present invention is to provide a system that is easy to install and retrofit into existing configurations without significant modifications.

[0020] Another objective of the present invention is to provide a system that minimizes false alarms by employing advanced filtering techniques to distinguish between actual deviations and temporary changes.

[0021] Another objective of the present invention is to provide a system capable of customization according to user preferences, such as visual, auditory, or remote notifications.

[0022] Another objective of the present invention is to provide a cost-effective system while maintaining high operational precision and reliability.

[0023] Another objective of the present invention is to provide a system that expands functionality by integrating with additional technologies, such as cameras or monitoring devices.

[0024] Another objective of the present invention is to provide a system that can be extended and applied to various industries, including automotive, logistics, and industrial applications.

[0025] Another objective of the present invention is to provide a system that minimizes user intervention by automating detection, processing, and warning mechanisms.

[0026] Another objective of the present invention is to provide a system that extends the operating life without additional energy consumption by ensuring efficient power management.

[0027] Another objective of the present invention is to provide a system that enables seamless introduction across the market by complying with industry standards and safety regulations.

[0028] Other objects and advantages of the present invention will become more apparent from the following detailed description, and such description does not limit the scope of the present invention. means of solving the problem

[0029] The present invention presents a load detection and notification system configured to continuously monitor loads or cargo loaded on the rooftop of a vehicle and to detect loss, displacement, or deviation occurring during vehicle operation. This system is applicable to both stationary and moving vehicles and addresses safety risks associated with unnoticed rooftop load loss.

[0030] The system measures applied loads in real time using load sensing elements integrated into the vehicle roof. While filtering out transient changes caused by vibration, road surface conditions, or vehicle driving dynamics, it amplifies, processes, and analyzes the detected data according to preset rules to identify significant and continuous load deviations.

[0031] When an actual load deviation is detected, the system generates a timely warning to the driver via visual, audible, or remote notifications. In some configurations, visual confirmation may be provided via a vehicle display system or camera-based monitoring. Additionally, the system can compensate for vehicle tilt to improve detection accuracy.

[0032] Overall, the disclosed system provides a reliable real-time rear-mounting solution to enhance vehicle safety during rooftop cargo transport, prevent cargo loss, and improve user awareness. Effects of the invention

[0033] The invention described in this specification has the following technical advantages in relation to a load detection and notification system for a vehicle rooftop.

[0034] It enhances user safety by providing immediate notifications of significant changes in monitored conditions.

[0035] It is easy to install and mount on existing configurations without significant changes.

[0036] False alarms are minimized by employing advanced filtering techniques to distinguish between actual deviations and temporary changes.

[0037] Customization based on user preferences is possible, such as visual, auditory, or remote notifications.

[0038] It is cost-effective while maintaining high operational precision and reliability.

[0039] Functionality can be expanded by integrating with additional technologies such as cameras or monitoring devices.

[0040] It can be expanded and applied to various industries, including automotive, logistics, and industrial applications.

[0041] Minimizes user intervention by automating detection, processing, and warning mechanisms.

[0042] It ensures efficient power management to extend operating life without additional energy consumption.

[0043] By complying with industry standards and safety regulations, seamless adoption across the market is possible. Brief explanation of the drawing

[0044] Hereinafter, the load detection and notification system and method for a vehicle rooftop according to the present invention will be described with reference to the attached drawings. FIGS. 1a, FIGS. 1b, and FIGS. 1c This is a drawing illustrating a system configuration according to one embodiment of the present invention. Fig. 2 This is a drawing illustrating the measurement of an applied load according to the present invention. Figures 3a and 3b This is a drawing illustrating the workflow process steps of a system according to the present invention. Figures 4a and 4b This is a drawing illustrating a method for detecting rooftop load deviation of a vehicle according to one embodiment of the present invention. Specific details for implementing the invention

[0045] Hereinafter, embodiments of the present invention will be described with reference to the attached drawings.

[0046] The embodiments are provided to convey the scope of the invention in detail and clearly to those skilled in the art. Numerous details regarding specific components and methods are presented to aid in a complete understanding of the embodiments of the invention. However, it will be obvious to those skilled in the art that the details provided in the embodiments of the invention should not be interpreted as limiting the scope of the invention. In some embodiments, known processes, known device structures, and known technologies are not described in detail.

[0047] The terms used in this invention are for the purpose of describing specific embodiments only and are not intended to limit the scope of this invention. As used in this invention, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. The terms “comprising,” “comprising,” “comprising,” and “having” are open-ended connecting phrases that specify the presence of the mentioned features, elements, modules, units, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or groups thereof.

[0048] Where one element is referred to as being "mounted," "fastened," "connected," or "combined" with another element, this may mean that it is directly mounted, fastened, connected, or combined with said other component. As used herein, the term "and / or" includes any and all combinations of one or more of the elements enumerated in association.

[0049] The transport of cargo or loads on vehicle rooftops is a common occurrence during long-distance driving and commercial operations; however, improper fastening, vibration, aerodynamic forces, or sudden vehicle movements can cause rooftop loads to shift or detach without the driver's immediate awareness, resulting in property loss, the risk of traffic accidents, and safety threats. Existing vehicle systems primarily focus on detecting load capacity or overloads, failing to provide real-time monitoring or timely notifications regarding rooftop load loss during vehicle operation. Therefore, there is a need for an intelligent real-time vehicle integration solution that can enhance road safety, prevent cargo loss, and improve overall user confidence during rooftop cargo transport by continuously monitoring the status of rooftop loads and providing immediate warnings to the driver upon detection of load loss or displacement.

[0050] Accordingly, the present invention provides a load detection and notification system and method for a vehicle rooftop (hereinafter referred to as the system (100) and method (200)). The present invention FIGS. 1a to 4b It will be explained by referring to .

[0051] Referring to FIG. 1a, the present invention provides a load detection and notification system and method for a vehicle rooftop configured to continuously monitor the weight (W) of a load or cargo placed on the roof of a vehicle and to provide a timely alarm when a significant load deviation is detected. The system (100) is intended to detect the loss, displacement, or detachment of a rooftop load that occurs mainly during vehicle operation, regardless of whether the vehicle is stopped or moving.

[0052] A load detection and notification system (100) for a vehicle rooftop (105) comprises a plurality of load cells (101) positioned at the bottom of the vehicle roof structure, an amplifier module (103), a microcontroller (104), a warning mechanism, a head-up display (HUD) (109), at least one accelerometer sensor, a surround view monitor (SVM), an external camera, a vehicle electronic control unit (ECU), a power supply unit powered by a vehicle battery, and a communication interface that enables data transmission, signal processing, warning generation, and visual or audible notification of rooftop load deviation.

[0053] In one embodiment, the system (100) includes a database operably coupled to a microcontroller (104). The database is configured to store one or more reference load values ​​corresponding to a corrected rooftop load state, a preset threshold, a preset duration, a deviation detection rule, and a processing rule used for signal filtering, verification, and compensation. The database further stores parameters related to accelerometer-based tilt compensation, warning trigger criteria, and historical load data for comparison and trend analysis. The microcontroller (104) accesses the stored data during real-time operation to evaluate the measured rooftop (105) load value, determines whether there is a significant and continuous load deviation, and activates the warning mechanism accordingly.

[0054] In one embodiment, the system (100) includes a plurality of load cells (101) configured to measure a load applied to the roof (105) of a vehicle. A load cell (101) is an electromechanical force sensing device that converts an applied mechanical force into a proportional electrical signal. In a preferred configuration, a plurality of load cells (101) are employed to improve measurement accuracy and load distribution sensing performance. For example, as shown in FIG. 1b, four load cells (101) are positioned near the corner area of ​​the vehicle roof structure corresponding to a typical cargo carrier (108) mounting point, and an additional load cell (101) is positioned in the central area of ​​the roof (105). This spatial distribution ensures that non-uniform load distribution, partial load loss, or cargo flow can be reliably detected.

[0055] In one embodiment, the load cell (101) is mounted between the vehicle roof panel and the headliner or on the underside of the roof carrier (108) mounting bracket and is protected from external exposure. This mounting arrangement allows the system (100) to be retro-mounted on an existing vehicle without structural changes to the roof assembly (105). The load cell (101) continuously generates a fine electrical signal proportional to the applied rooftop load.

[0056] In one embodiment, an electrical signal generated by a load cell (101) is transmitted to an amplifier module (103) operably coupled thereto. The amplifier module (103) includes a high-resolution load cell amplifier, such as an HX711 module, configured to amplify a weak analog signal received from the load cell (101). Additionally, the amplifier module (103) performs analog-to-digital conversion to enable a precise digital representation of weight data for subsequent processing. The amplifier module (103) is powered by a vehicle battery and is electrically interfaced with the load cell (101) through excitation and signal terminals.

[0057] The amplified digital load data is transmitted to a microcontroller (104) that serves as the central processing unit of the system (100). In a preferred embodiment, the microcontroller (104) includes an Arduino-based microcontroller, but other equivalent microcontroller platforms may also be used. The microcontroller (104) is programmed to continuously monitor real-time rooftop load data and to set a reference load value corresponding to an initial or corrected load state.

[0058] The microcontroller (104) is configured to process input load data using a dynamic filtering algorithm that distinguishes actual load deviations from transient changes caused by vehicle vibration, aerodynamic forces, acceleration, braking, or road surface irregularities. This filtering ensures that false alarms are not triggered by momentary fluctuations. The microcontroller (104) determines that the deviation is valid only when the detected deviation exceeds a preset threshold and is maintained for a preset duration, e.g., 3 to 5 seconds.

[0059] In one embodiment, the system (100) further includes at least one accelerometer sensor operably coupled to a microcontroller (104). The accelerometer sensor is configured to detect road surface inclination or vehicle body roll behavior by measuring the vehicle’s angle of inclination (θ) (106) relative to the road surface. The microcontroller (104) uses the accelerometer data as an auxiliary input to compensate for variations in apparent load caused by the inclination or slope.

[0060] In this configuration, the microcontroller (104) calculates the estimated effective rooftop load component using a cosine-based relationship (W × cos(θ)) that multiplies the applied load (W) by the cosine value of the measured angle of inclination (θ). Through this calculation, the system (100) recognizes that the actual mass of the rooftop (105) cargo remains constant, while mathematically compensating for changes in the effective vertical load caused by the tilt of the vehicle. Accelerometer data is fused with load cell data to improve the accuracy and robustness of detecting rooftop load deviations.

[0061] When a verified load deviation indicating loss or displacement of the load is detected, the microcontroller (104) activates a warning mechanism operably coupled thereto. The warning mechanism includes one or more of a visual warning, an audible warning, and a remote notification. In one embodiment, the visual warning includes a graphic icon or a flashing warning symbol displayed on a vehicle infotainment system, instrument panel, or head-up display (HUD) (109). The audible warning includes a warning sound generated inside the vehicle to immediately attract the driver's attention.

[0062] In the case of a vehicle equipped with a surround view monitor (SVM), the system (100) is configured to automatically activate the SVM when a load deviation is detected. The SVM displays a top-down view of the vehicle on an infotainment display or HUD (109), allowing the user to visually check the status of the rooftop cargo. In another embodiment, the system (100) may further include an external camera that provides visual confirmation of the status of the rooftop cargo when a deviation is detected, either independently or in conjunction with the SVM.

[0063] In one embodiment, the system (100) is configured to transmit processed load data or a warning signal to a vehicle electronic control unit (ECU). Additionally, the system (100) enables remote notification of rooftop cargo loss by generating a wireless warning transmitted to a user terminal, such as a smartphone. Such warnings include text messages or application-based notifications.

[0064] The system (100) is powered directly from the vehicle battery and is configured for efficient power consumption to ensure continuous operation without additional energy consumption. The system (100) operates reliably at vehicle speeds ranging from approximately 30 km / h to 100 km / h, reflecting actual driving conditions.

[0065] In one embodiment, the system (100) further includes at least one accelerometer sensor operably coupled to a microcontroller (104). The accelerometer sensor is configured to measure acceleration components along one or more axes and to determine the angle of inclination (θ) (106) of the vehicle relative to the road surface. The measured angle of inclination (θ) (106) corresponds to the slope of the road surface, body roll, or a combination thereof. The accelerometer sensor is mounted in the vehicle roof area or any suitable location where the tilt of the vehicle can be accurately detected.

[0066] Referring to FIG. 1b, in one embodiment, the system (100) includes at least one accelerometer sensor (106) operably coupled to a microcontroller (104). The accelerometer sensor is configured to measure acceleration components along three orthogonal axes (X, Y, Z) corresponding to the longitudinal, lateral, and vertical directions of the vehicle.

[0067] The microcontroller (104) is configured to determine the total angle of inclination (θ) of the vehicle relative to a horizontal reference (direction of gravity) based on the measured acceleration component. The total angle of inclination represents the tilt of the vehicle due to the slope of the road surface, body roll, or a combination thereof, and is calculated as follows.

[0068]

[0069] Here

[0070] a x is the longitudinal axis acceleration of the vehicle, and

[0071] a y is the lateral axis acceleration of the vehicle, and

[0072] a z is the vertical axis acceleration of the vehicle, and

[0073] arccos is an abbreviation for arc cosine, which is the inverse cosine function, and

[0074] Calculates the angle corresponding to the input cosine value.

[0075] The determined total inclination angle (θ) is used to compensate for the measured rooftop load to exclude the influence of the vehicle's tilt. The inclination-compensated effective load (W eff ) is calculated as follows.

[0076] W eff = W × cos(θ)

[0077] Here, W is the total rooftop load measured by the load cell (101).

[0078] By applying cosine-based slope compensation, the system can distinguish apparent load changes caused by the vehicle's tilt from actual load loss events. Compensated effective load (W eff) is the stored reference load (W) for the corresponding load combination. ref It is compared with ) and the load deviation is calculated as follows.

[0079] Load deviation = W ref - W eff

[0080] If the load deviation exceeds a preset threshold during a preset duration, the warning mechanism is activated to indicate that a rooftop load loss event has occurred.

[0081] This approach ensures accurate detection of rooftop load deviations regardless of vehicle orientation, road slope, or dynamic vehicle behavior.

[0082] In one embodiment, the carrier is a load supported on the carrier's load-bearing platform. L Transports the load L is multiple cargo L 1 , L 2 , L 3 It includes, and the weight of each load is in Newtons. L i .w It is expressed as. Load L Total weight of W is defined as follows.

[0083] W = L1.w + L2.w + L3.w

[0084] The carrier has a road surface incline angle 0 degrees When located on flat ground, total weight W It acts substantially vertically on the load-bearing platform.

[0085] The suitcase angle θ When positioned on an inclined surface, the force applied to the carrier due to the load is reduced relative to the total weight. Under these conditions, the force acting normal to the load-bearing platform is as follows, and

[0086] W. cos θ

[0087] In addition, the normal force contribution of each load is as follows.

[0088] L1.wcosθ + L2.wcosθ + L3.wcosθ

[0089] The carrier is the angle of inclination of the road surface θ It includes an accelerometer configured to determine the angle of inclination. The accelerometer determines the angle of inclination. θ By using this to enable compensation for the force applied to the carrier, the force contribution of each load is calculated independently of the road surface slope.

[0090] One of the cargoes, for example L 1 When detached from this carrier, the total weight supported by the carrier W As it decreases, the force borne by the carrier in response W cos θ also decreases. The accelerometer is the angle of inclination θ It compensates for changes in force caused by, and as a result, the cargo L 1 The difference between the compensated load value before and after falling from this carrier indicates the loss of the corresponding load.

[0091] The microcontroller (104) uses accelerometer data as an auxiliary input to compensate for variations in the effective rooftop load caused by the vehicle's inclination. When the vehicle travels on an incline, the actual mass of the rooftop load remains constant, but the effective vertical load detected by the load cell (101) changes as a function of the angle of inclination (θ). To reflect this phenomenon, the microcontroller (104) calculates the estimated effective rooftop load component using a cosine-based relationship that multiplies the applied load (W) by the cosine value of the measured angle of inclination (θ), which is expressed by the following mathematical formula.

[0092] Effective load = W × cos(θ)

[0093] Referring to FIG. 1b, through this cosine-based calculation, the system (100) can distinguish from actual load loss events apparent load changes caused solely by slope or inclination. In one embodiment, accelerometer data from an accelerometer sensor is fused with load cell data using a data fusion or compensation algorithm to improve the accuracy and reliability of rooftop load deviation detection.

[0094] In an exemplary embodiment, the system (100) is configured to operate within a typical rooftop (105) load range of approximately 5 kg to 60 kg. Table 1 below illustrates typical load combinations under various slope conditions processed by the microcontroller (104) using a cosine-based relationship and the corresponding effective load values.

[0095]

[0096] [Representative Rooftop Load Combinations with Slope Compensation]

[0097] Note: Cosine function value:

[0098] cos(10°) = 0.985

[0099] cos(15°) = 0.966

[0100] cos(30°) = 0.866

[0101] The values ​​in Table 1 represent the effective rooftop load detected by the load cell (101) after compensating for the vehicle's tilt using accelerometer data. These values ​​are used as reference or verification points while the microcontroller (104) performs real-time monitoring.

[0102] In another exemplary embodiment, as a specific calculation example, assume a load combination consisting of three items having weights of 10 kg, 5 kg, and 10 kg respectively, with a total rooftop load (w) of 25 kg. When driving on a road slope where the vehicle's angle of inclination (θ) (106) measured by an accelerometer sensor is 15 degrees, the microcontroller (104) calculates the effective rooftop load using the following cosine-based relationship.

[0103] Effective load = 25 × cos(15°)

[0104] cos(15°) Since it is 0.966, the calculated effective load is as follows.

[0105] Effective load 25 × 0.966 24.15 kg

[0106] Load deviation = W ref - W eff

[0107] Here, W ref is the reference value, W eff is the effective load.

[0108] The system compares the load deviation with a preset threshold during a preset duration.

[0109] In one embodiment, the warning mechanism is configured to generate a notification when the load deviation exceeds a preset threshold for a preset duration, which indicates that an actual rooftop load loss event has occurred.

[0110] In an exemplary embodiment, a mathematical example is illustrated below.

[0111] Cargo:

[0112] L1 = 10 kg

[0113] L2 = 5 kg

[0114] L3 = 10 kg

[0115] Total load: W = 25 kg

[0116] Angle of inclination: θ = 15°

[0117] Cosine reward value: cos(15°) 0.966

[0118] Effective load:

[0119] W eff = 25 × 0.966 24.15 kg

[0120] Standard load:

[0121] W_ref = 25 kg

[0122] Load deviation:

[0123] ΔW = W ref - W eff = 25 - 24.15 = 0.85 kg

[0124] Interpretation: No warning generated because the deviation is below the threshold.

[0125] Scenario: When L1 (10 kg) falls

[0126] New total load:

[0127] W new = 15 kg

[0128] Slope-compensated effective load:

[0129] W eff,new = 15 × 0.966 14.49 kg

[0130] Load deviation:

[0131] ΔW = W ref - W eff,new = 25 - 14.49 10.51 kg

[0132] Interpretation: Warning triggered because deviation exceeds threshold

[0133] The microcontroller (104) compares this slope-compensated effective load value with a stored reference value. If a rapid and continuous decrease exceeding a preset threshold occurs in subsequent load measurements and this deviation is maintained for a preset duration (e.g., 3 to 5 seconds), the system (100) determines the event as an actual loss of rooftop load and accordingly activates a warning mechanism.

[0134] In this way, by integrating load cell measurements with accelerometer-based tilt compensation, the system (100) maintains high sensitivity to actual rooftop load deviations while achieving improved robustness against false alarms. Through this combined sensing approach, the system (100) functions reliably across various road surface conditions, slopes, and driving scenarios, ensuring accurate detection of rooftop load loss.

[0135] When in operation, the system (100) is configured to monitor the rooftop load through the load cell (101). When a significant and persistent deviation from the reference load is detected, the microcontroller (104) processes the amplified and filtered data, performs tilt compensation if necessary, and activates a warning mechanism. Through this, the system (100) provides an immediate and reliable notification of rooftop load loss, thereby enabling the user to take timely corrective action.

[0136] Fig. 1cThis illustrates the circuit configuration of a weight measurement system using an Arduino Uno microcontroller (104), an HX711 amplifier module (103), a load cell (101), and a 16x2 LCD display / HUD (109). The load cell (101) acts as a primary sensor that detects the applied weight and converts it into a fine electrical signal. This signal is applied to the HX711 amplifier module (103), which is configured to amplify the weak signal and process it into a format readable by the Arduino / microcontroller (104). Looking at the connection relationships, the wires of the load cell (Excitation+ / Excitation- for power supply and Signal+ / Signal- for output) are configured to interface with the HX711 module. The Arduino Uno microcontroller (104) receives the signal amplified from the HX711 (103), processes the data to calculate the weight, and the calculated weight is displayed on a 16x2 LCD screen / HUD (109). Power is supplied to each component through the Arduino's 5V pin, allowing the entire system to operate organically. This configuration enables precise real-time weight measurement and display.

[0137] Fig. 2The figure illustrates an applied load measurement system comprising an Arduino Uno microcontroller, an HX711 load cell amplifier module (103), and a load cell sensor. The load cell (101) detects the applied weight or force and generates a microelectric signal, which is transmitted to the HX711 amplifier module (103) for amplification and signal conversion. The load cell (101) is connected to the HX711 via E+ and E- pins for excitation voltage and A+ and A- pins for signal output. The HX711 module is powered by the Arduino's 5V pin, and the ground (GND) is connected to the Arduino's GND. The data and clock lines (DT and SCK) of the HX711 are connected to the Arduino's digital pins, typically D3 and D2, to enable signal transmission for further processing. The Arduino processes the amplified signal received from the HX711 to calculate the weight, thereby enabling real-time monitoring or display. This configuration provides a compact and reliable solution for applications requiring precise weight measurement.

[0138] FIGS. 3a and FIGS. 3b This illustrates a process flow diagram for detecting rooftop load loss using a load cell and a warning mechanism.

[0139] In step 302, the process (300) includes the step of detecting the weight applied to the roof of the vehicle through a plurality of load cells and generating a corresponding electrical signal.

[0140] In step 304, the process (300) includes a step of determining whether weight data has been successfully received from the load cell.

[0141] In step 306, the process (300) includes a step of analyzing the received weight data to determine whether a significant deviation from the stored reference load value has occurred.

[0142] In step 308, the process (300) includes a step of verifying whether the detected deviation persists for a preset duration, e.g., 3 to 4 seconds.

[0143] In step 310, the process (300) includes a step of activating a warning mechanism when the deviation exceeds a preset threshold and persists for a required time, wherein the warning may be a visual, audible, or remote notification.

[0144] In step 312, the process (300) includes the step of displaying a surround view monitor (SVM) image on a head-up display (HUD) for visual verification of the rooftop load status.

[0145] In step 314, the process (300) includes a step of continuing monitoring or terminating the process as needed.

[0146] FIGS. 4a and FIGS. 4b This illustrates a method for load detection and notification for a vehicle rooftop according to an embodiment of the present invention.

[0147] In step 202, the method (200) includes the step of storing a set of deviation detection rules, a reference average value, a preset threshold, a preset duration, and a set of processing rules in a database.

[0148] In step 204, the method (200) includes the step of measuring a load applied to the rooftop of a vehicle by a plurality of load cells (101) and generating an electrical signal corresponding to the measured load.

[0149] In step 206, the method (200) includes the step of amplifying the electrical signal generated by the load cell (101) by the amplifier module (103).

[0150] In step 208, the method (200) includes the step of measuring vehicle behavior data, including acceleration and vibration, by at least one accelerometer.

[0151] In step 210, the method (200) includes receiving amplified signal and vehicle behavior data by a microcontroller (104), processing the amplified signal using a processing rule set, and detecting rooftop load deviations from reference average values ​​using a deviation detection rule set.

[0152] In step 212, the method (200) includes the step of generating a notification by a warning mechanism when the detected deviation exceeds a preset threshold for a preset duration.

[0153] In one embodiment, a load cell casing is installed below the surface of the rooftop (105) to measure the weight of the load. A total of five load sensor casings may be strategically positioned, specifically four at the corners of the inner roof of the vehicle and one in the center. This configuration ensures accurate weight measurement and effective detection of load changes.

[0154] In one embodiment, the power required for the load cell (101) is supplied directly from the vehicle battery, enabling continuous operation without a separate power source. The system (100) may utilize a two-cable mechanism, whereby the input cable supplies power to the load cell (101) and the output cable transmits weight data to the vehicle's microcontroller (104) or infotainment system. This arrangement enables seamless integration with existing vehicle systems.

[0155] In one embodiment, the system (100) is configured to incorporate an external camera system configured to visually check the load status. This camera may be configured to provide a split-screen display on an infotainment system or HUD (109). When a loss of cargo is detected, the screen displays a top-down view of the vehicle along with a visual representation of the cargo, allowing the user to immediately identify the missing items.

[0156] In one embodiment, the functionality of the external camera system and the surround view monitor (SVM) is enhanced by integrating simulated experiments and precise algorithms. For example, simulated experiments can demonstrate that the system can provide a notification to the user with a delay of approximately 5 seconds after detecting a loss of cargo. Additionally, the activation of the camera and SVM can occur within a range of 3 to 5 seconds from the moment a weight deviation is detected, thereby enabling a rapid response and minimizing delays in user notification.

[0157] In one embodiment, the system can operate effectively regardless of whether or not the SVM is integrated. This flexibility allows for adaptability across different vehicle models and configurations. Even in the case of vehicles without an SVM, the system can still provide accurate warnings through other mechanisms, such as auditory or visual notifications via the infotainment system.

[0158] In one embodiment, an auditory warning mechanism is implemented to provide immediate feedback to the user when a change in the weight of the rooftop cargo occurs. This feature can complement visual notifications by allowing the driver to immediately recognize the problem even in situations where the user is unable to pay attention to the display screen.

[0159] In one embodiment, the system can be powered entirely by the vehicle battery, eliminating the need for a separate external power source and making installation easy. Data collected by the load cell (101) is processed and transmitted to the ECU for further analysis or displayed directly on the infotainment system. This ensures efficient communication between the hardware components and the vehicle's onboard system, enabling real-time monitoring and warnings.

[0160] The present invention provides embodiments of a load detection and notification system for a vehicle rooftop, which are illustrated through the following examples to explain the function and actual application.

[0161] In one exemplary embodiment, a user drives a sports utility vehicle (SUV) with multiple loads secured to the vehicle roof for a long-distance trip. While the vehicle is traveling on a highway, one of the loads becomes loose and detaches from the roof (105). A load detection and notification system (100) continuously monitors the rooftop load using multiple load cells (101) and detects a continuous deviation from a stored reference load value. When it is determined that the deviation exceeds a preset threshold value for a preset duration, a microcontroller (104) activates a warning mechanism. The user receives an audible warning and a visual warning icon via an infotainment display, thereby allowing the user to immediately stop the vehicle and retrieve the detached load.

[0162] In another exemplary embodiment, a commercial vehicle driver transports cargo loaded on the roof of a delivery truck. During a sharp turn, part of the rooftop cargo shifts and falls off the vehicle. The system (100) detects the resulting load deviation and generates a visual warning on the vehicle's dashboard. This warning allows the driver to immediately stop the vehicle and secure the remaining cargo to prevent further loss and reduce the risk on the road caused by falling objects.

[0163] In another exemplary embodiment, a driver transports sports equipment mounted on the roof (105) of a passenger vehicle. While driving on a bumpy road surface, one of the items becomes detached. The system (100) detects a continuous decrease in the roof-top load and generates a visual warning on the head-up display (HUD) (109). Upon detection, the system (100) automatically activates the surround view monitor (SVM) to provide a top-down view of the vehicle, thereby allowing the driver to visually identify the detached item. The driver safely stops the vehicle and retrieves the detached equipment.

[0164] In another exemplary embodiment, a user traveling to a resort transports bulky camping equipment on the roof of a vehicle (105). While driving over a bridge in strong crosswind conditions, some of the rooftop load comes off. The system (100) detects the load deviation and processes the data using filtering and verification rules, generating both an audible warning inside the vehicle and a wireless notification sent to the user's mobile device. Through timely notifications, the user can return to the location and retrieve the fallen equipment.

[0165] In another exemplary embodiment, a bus driver transports passenger cargo on the bus rooftop (105) while driving on a road with varying elevation. As the bus ascends a steep slope, some of the cargo falls off. The system (100) utilizes accelerometer-based slope compensation and load cell data fusion to detect the actual load loss event and generates a visual warning on the instrument panel display. By receiving the warning in real time and taking immediate action, the driver prevents the loss of passenger cargo and reduces the risk of traffic disruption.

[0166] In another embodiment, a truck driver carries agricultural products on the vehicle roof (105) while driving on a vibrating farm road. Some of the rooftop cargo falls off due to continuous vibration. The system (100) detects the rooftop load deviation, verifies the event based on a preset duration standard, and generates a warning on the vehicle display. The driver prevents financial loss and potential road hazards by quickly stopping the vehicle to secure the remaining cargo and recover the fallen items.

[0167] In another exemplary embodiment, a user transports specialized equipment secured to the roof of a passenger vehicle for a business event. During transport, the system (100) detects a continuous decrease in the rooftop load corresponding to the loss of a small suitcase. The system (100) generates an audible warning and displays a warning icon on the infotainment system. The user can react quickly to retrieve the lost item and proceed without significant delay.

[0168] In one operational configuration, the system (100) is integrated within the vehicle roof (105) structure, where a plurality of load cells (101) are positioned between the vehicle roof panel and the headliner or below the rooftop carrier (108) mounting point to continuously and inconspicuously monitor the rooftop load. Electrical signals generated from the load cells (101) are transmitted to an amplifier module (103), such as a high-resolution HX711 load cell amplifier, and the amplifier module amplifies and digitizes the signals and then transmits the processed data to a microcontroller (104) programmed with load processing, filtering, and deviation detection algorithms for real-time analysis. The microcontroller (104) is operably coupled to a vehicle display interface including an infotainment system, an instrument panel, or a head-up display (HUD) (109), and upon detection of a significant and continuous rooftop load deviation exceeding a preset threshold for a preset duration, the microcontroller (104) activates a warning mechanism including at least one of a visual warning, an audible warning, and a remote notification. In a vehicle equipped with a Surround View Monitor (SVM), the system (100) automatically activates the SVM to display a top-down view of the vehicle for visual verification of the rooftop cargo status, wherein the system (100) operates continuously and in real time, including during high-speed driving, while employing filtering and verification techniques to prevent false alarms caused by transient influences such as vibration, aerodynamic forces or road surface irregularities.

[0169] Advantageously, the disclosed system (100) provides a sensor-based, real-time, post-mountable solution for rooftop load monitoring. By combining load cell detection with intelligent signal processing, optional accelerometer compensation, and a multi-mode warning mechanism, the system (100) improves vehicle safety, minimizes false alarms, and enhances user confidence during rooftop load or cargo transport.

[0170] The description of the foregoing embodiments is provided for illustrative purposes only and is not intended to limit the scope of the invention. The individual components of a particular embodiment are generally interchangeable but are not limited to that embodiment. Such modifications are not considered to be outside the scope of the invention, and all such modifications are considered to be included within the scope of the invention.

[0171] Technological advancement

[0172] The invention described herein has the following technical advantages in relation to a load detection and notification system for a vehicle rooftop, but is not limited thereto.

[0173] It enhances user safety by providing immediate notifications of significant changes in monitored conditions.

[0174] It is easy to install and mount on existing configurations without significant changes.

[0175] False alarms are minimized by employing advanced filtering techniques to distinguish between actual deviations and temporary changes.

[0176] Customization based on user preferences is possible, such as visual, auditory, or remote notifications.

[0177] It is cost-effective while maintaining high operational precision and reliability.

[0178] Functionality can be expanded by integrating with additional technologies such as cameras or monitoring devices.

[0179] It can be expanded and applied to various industries, including automotive, logistics, and industrial applications.

[0180] Minimizes user intervention by automating detection, processing, and warning mechanisms.

[0181] It ensures efficient power management to extend operating life without additional energy consumption.

[0182] By complying with industry standards and safety regulations, seamless adoption across the market is possible.

[0183] The foregoing invention has been described with reference to embodiments that do not limit the scope and range of the invention. The detailed description provided herein is purely for illustrative and illustrative purposes.

[0184] The embodiments of this specification, their various features, and advantageous details are described below with reference to non-limiting embodiments. Descriptions of known components and processing techniques are omitted so as not to unnecessarily obscure the embodiments of the invention. The examples used in this specification are merely intended to aid in understanding how the embodiments may be practiced and to enable those skilled in the art to practice them. Accordingly, these examples should not be construed as limiting the scope of the embodiments of this specification.

[0185] As the foregoing description of specific embodiments sufficiently discloses the general characteristics of the invention, others may easily modify and / or adapt these specific embodiments to various applications by applying current knowledge without departing from the general concept, and such adaptation and modification should be understood within the meaning and scope of the equivalents of the disclosed embodiments, and are intended to be so. It should be understood that the phrases or terms adopted herein are for illustrative purposes only and are not for limiting purposes. Accordingly, although embodiments of the invention have been described in terms of preferred embodiments, those skilled in the art will recognize that modifications may be made within the spirit and scope of the embodiments described herein.

[0186] Any discussion regarding devices, articles, etc. included in this specification is intended solely to provide context for the present invention. It should not be construed that any part or all of this content constitutes part of the prior art or was ordinary knowledge in the field related to the present invention prior to the priority date of this application.

[0187] Although substantial emphasis has been placed on the components and parts of the preferred embodiments in this specification, it should be understood that many embodiments are possible and many modifications can be made to the preferred embodiments without departing from the principles of the invention. Such modifications in the preferred and other embodiments of the invention will be apparent to those skilled in the art from this specification, and therefore it should be clearly understood that the foregoing description is merely illustrative and not limiting of the invention. Explanation of the symbols

[0188] 100 System 101 Multiple load cells 103 Amplifier module (e.g., HX711) 104 Microcontroller 105 Rooftop / Roof / Roof Panel 106 Angle of inclination (θ) 108 Rooftop Carrier 109 Head-up display cargo L1, L2, L3 200-212 Method and Steps 300-314 Process and steps

Claims

Claim 1 As a load detection and notification system (100) for a vehicle rooftop, A database configured to store a set of deviation detection rules, a reference mean value, a preset threshold, a preset duration, and a set of processing rules; A plurality of load cells (101) configured to measure a load applied to the vehicle roof and generate an electrical signal corresponding to the measured load; An amplifier module (103) configured to receive the above electrical signal, amplify it, and generate an amplified signal; At least one accelerometer configured to measure vehicle behavior data including acceleration and vibration; A microcontroller (104) configured to receive the amplified signal and the vehicle behavior data, process the amplified signal using the processing rule set, and detect deviations of the rooftop load relative to the reference average value using the deviation detection rule set; and A system (100) comprising a warning mechanism configured to generate a notification when the detected deviation exceeds the preset threshold during the preset duration. Claim 2 In claim 1, the microcontroller (104) is configured to compensate for a rooftop load deviation detected based on the vehicle motion data, in a system (100). Claim 3 In claim 1, the system (100) is configured such that the accelerometer detects at least one of acceleration, deceleration, inclination, vibration, or road-induced motion of a vehicle. Claim 4 In paragraph 2, the microcontroller (104) is configured to distinguish dynamic load changes caused by vehicle movement from static rooftop load changes, in a system (100). Claim 5 In paragraph 3, the system (100) is configured such that the accelerometer measures the angle of inclination (θ) (106) of the vehicle relative to the road surface. Claim 6 In claim 1, the plurality of load cells (101) comprises at least four load cells (101) disposed in the corner area of ​​the vehicle roof and at least one load cell (101) disposed in the central area of ​​the vehicle roof, the system (100). Claim 7 In claim 1, the system (100) comprises an amplifier module (103) including a high-resolution load cell amplifier including an HX711 module. Claim 8 In claim 1, the microcontroller (104) is configured to continuously monitor the rooftop load while the vehicle is in a driving or stationary state, the system (100). Claim 9 In claim 7, the microcontroller (104) is configured to apply a dynamic filtering algorithm to distinguish actual load deviations from transient fluctuations caused by vibration, aerodynamic force, acceleration, braking, or road surface irregularities, in a system (100). Claim 10 In claim 5, the detected deviation is verified only when the deviation persists for a period of 3 to 5 seconds, in a system (100). Claim 11 In claim 1, the warning mechanism comprises a system (100) including a graphic icon configured to indicate a rooftop load deviation. Claim 12 In claim 1, the warning mechanism comprises at least one of a visual warning, an audible warning, and a remote notification, in a system (100). Claim 13 In paragraph 12, the above visual warning is displayed on at least one of a vehicle infotainment system, an instrument panel, and a head-up display (HUD) (109), the system (100). Claim 14 In paragraph 12, the above visual warning includes a flashing warning icon indicating rooftop cargo loss, system (100). Claim 15 In paragraph 12, the above-mentioned audible warning includes a warning sound generated inside the vehicle, system (100). Claim 16 In claim 1, the system (100) is configured to activate a surround view monitor (SVM) upon detection of deviation. Claim 17 In claim 16, the system (100) is configured such that the surround view monitor (SVM) displays a top-down view of the vehicle for visual verification of the rooftop cargo status. Claim 18 In claim 1, the load cell (101) is mounted between the vehicle roof panel (105) and the headliner, in a system (100). Claim 19 In claim 1, the system (100) is configured to be retrofitted to an existing vehicle without structural changes. Claim 20 In claim 1, the system (100) is a system (100) that receives power from a vehicle battery. Claim 21 In claim 1, the system (100) in which load data processed by the microcontroller (104) is transmitted to a vehicle electronic control unit. Claim 22 In claim 1, the system (100) reliably operates at a vehicle speed in the range of 30 km / h to 100 km / h. Claim 23 In claim 5, the system (100) is configured such that the microcontroller (104) uses the measured inclination angle (θ) (106) to compensate for the road surface inclination and the vehicle body roll. Claim 24 In paragraph 23, the microcontroller (104) calculates an estimated rooftop load component using a cosine-based relationship proportional to load (W) × cos(θ), in a system (100). Claim 25 In paragraph 23, the system (100) is fused with load cell data to improve the accuracy of detecting rooftop load deviations. Claim 26 A system (100) according to claim 1, further comprising an external camera configured to provide visual confirmation of the rooftop load condition when the deviation is detected. Claim 27 In claim 1, the system (100) generates a wireless warning transmitted to a user terminal. Claim 28 As a load detection and notification method (200) for a vehicle rooftop, the method (200) A step of storing a set of deviation detection rules, a reference mean value, a preset threshold, a preset duration, and a set of processing rules in a database; A step of measuring a load applied to a vehicle roof by a plurality of load cells (101) and generating an electrical signal corresponding to the measured load; A step of amplifying the electrical signal generated by the load cell (101) by the amplifier module (103); A step of measuring vehicle motion data, including acceleration and vibration, by at least one accelerometer; A step of receiving the amplified signal and the vehicle behavior data by a microcontroller (104), processing the amplified signal using the processing rule set, and detecting the deviation of the rooftop load relative to the reference average value using the deviation detection rule set; and A method (200) comprising the step of generating a notification when the detected deviation exceeds the preset threshold for the preset duration by means of a warning mechanism.

Images