Vehicle-mounted monitoring system

Abstract

The invention provides a vehicle-mounted monitoring system. The vehicle-mounted monitoring system comprises a pressure sensing film, a control unit and an image acquisition unit, the pressure sensing film is attached to the surface of a vehicle and electrically connected with the control unit. The pressure sensing film is used for sending a trigger signal to the control unit when being subjected to external pressure, and the control unit is used for determining a corresponding stress position according to the received trigger signal; the image acquisition unit is electrically connected with the control unit, and the image acquisition unit is used for acquiring an environment image of the corresponding area according to the stress position determined by the control unit. According to the vehicle-mounted monitoring system provided by the embodiment of the invention, the unnecessary image acquisition work of the image acquisition unit can be greatly reduced, so that the environment image can be timely acquired when the vehicle is possibly damaged, and the power consumption of the image acquisition unit can be greatly reduced; and the storage space occupied by the acquired environment image information can be reduced.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a vehicle monitoring system. Background Technology

[0002] Currently, "sentinel systems" applied to vehicles typically use onboard radar equipment to continuously monitor the environment around the vehicle. When an object or person gets too close to the vehicle, the system will trigger a video recording device to record the surrounding situation so that the source can be traced if the vehicle is damaged. Summary of the Invention

[0003] This invention provides an in-vehicle monitoring system designed to reduce the power consumption of traditional vehicle sentry systems.

[0004] This invention provides an in-vehicle monitoring system, which includes a pressure-sensing membrane, a control unit, and an image acquisition unit;

[0005] The pressure-sensing membrane is attached to the vehicle surface, and the control unit is electrically connected to the pressure-sensing membrane. The pressure-sensing membrane is used to send a trigger signal to the control unit when it is subjected to external pressure, and the control unit is used to determine the corresponding force location based on the received trigger signal.

[0006] The image acquisition unit is electrically connected to the control unit, and the image acquisition unit is used to acquire environmental images of the corresponding area based on the force position determined by the control unit.

[0007] Optionally, the pressure-sensing film includes a base layer and a trigger array;

[0008] The trigger array is disposed on the base layer;

[0009] The trigger array includes multiple trigger units arranged in an array, and the trigger units emit the trigger signal in response to external pressure;

[0010] The control unit is used to determine the corresponding position of the trigger unit based on the received trigger signal.

[0011] Optionally, the trigger array further includes multiple drive lines and multiple acquisition lines;

[0012] Each row of trigger units is connected to at least one drive line; each column of trigger units is connected to at least one acquisition line.

[0013] The control unit is electrically connected to the multiple drive lines and is used to provide scan drive signals to the multiple rows of trigger units through the multiple drive lines;

[0014] The control unit is electrically connected to multiple acquisition lines and is used to receive trigger signals from the corresponding trigger units via the acquisition lines.

[0015] Optionally, the control unit includes a computing module, a driving module, and a data acquisition module;

[0016] The driving module is used to sequentially provide the driving signals to the multiple driving lines;

[0017] The acquisition module is connected to multiple acquisition lines for acquiring the trigger signals column by column;

[0018] The calculation module is used to calculate the position of the triggering unit that issued the triggering signal based on the triggering signal acquired by the acquisition module and the corresponding driving signal.

[0019] Optionally, the control unit is further configured to compare the level of the trigger signal with that of a preset comparison signal; if the level of the trigger signal is less than that of the preset comparison signal, the trigger signal is determined to be invalid; if the level of the trigger signal is greater than or equal to that of the preset comparison signal, the position of the triggering unit that issued the trigger signal is calculated.

[0020] Optionally, the control unit further includes a comparator;

[0021] The comparator has two comparison terminals and one output terminal; one comparison terminal of the comparator is connected to the acquisition module to receive the trigger signal acquired by the acquisition module; the other comparison terminal of the comparator is supplied with the preset comparison signal.

[0022] The comparator is used to compare the level of the trigger signal with the level of the preset comparison signal, and outputs a high-level signal when the level of the trigger signal is greater than or equal to the level of the preset comparison signal, and outputs a low-level signal when the level of the trigger signal is less than the level of the preset comparison signal.

[0023] In response to receiving a high-level signal output by the comparator, the calculation module calculates the position of the triggering unit that issued the trigger signal.

[0024] Optionally, the triggering unit includes a thin-film transistor, a voltage divider resistor, and a thin-film piezoresistive resistor:

[0025] The gate of the thin-film transistor is electrically connected to the driving line; the first electrode of the thin-film transistor is electrically connected to an external constant voltage power supply.

[0026] The voltage divider resistor and the thin-film piezoresistive resistor are connected in series between the second electrode of the thin-film transistor and the ground wire; the thin-film piezoresistive resistor is used to change its own resistance value in response to external pressure;

[0027] The acquisition line is connected between the voltage divider resistor and the thin-film piezoresistive resistor to acquire the trigger signal.

[0028] Optionally, the trigger array includes a first sub-layer and a second sub-layer;

[0029] The thin-film transistors of the trigger unit are distributed in the first sub-layer;

[0030] The thin-film piezoelectric resistor of the trigger unit is distributed in the second sub-layer;

[0031] The thin-film transistor and the thin-film piezoresistor in the same trigger unit are electrically connected through interlayer conductive lines.

[0032] Optionally, the control unit is further configured to determine whether the number of trigger signals received within a preset time period reaches a preset number threshold; if so, all of the trigger signals are determined to be invalid signals.

[0033] Optionally, the pressure-sensing film may further include an encapsulation layer;

[0034] The trigger array is disposed on one side surface of the base layer;

[0035] The encapsulation layer covers the surface of the trigger array on the side away from the base layer.

[0036] The present invention has the following beneficial effects:

[0037] The vehicle monitoring system provided by this invention includes a pressure-sensing film attached to the vehicle surface, a control unit, and an image acquisition unit. When external pressure is applied to the vehicle surface, the pressure-sensing film can identify the external pressure and send a corresponding trigger signal to the control unit. The control unit can determine the location of the force based on the trigger signal, thereby triggering the image acquisition unit to acquire environmental images near the location of the force. In this way, the image acquisition unit only acquires environmental images when the vehicle is subjected to external pressure, and does not continuously acquire environmental images or acquire environmental images only when an object or person is nearby. Since the vehicle surface is not subjected to external pressure, it means that the vehicle will not be damaged by external force, and therefore there is no need to acquire environmental images. Thus, the vehicle monitoring system proposed in this invention can greatly reduce the unnecessary image acquisition work of the image acquisition unit, thereby enabling timely acquisition of environmental images when the vehicle may be damaged, significantly reducing the power consumption of the image acquisition unit, and reducing the storage space occupied by the acquired environmental image information. Attached Figure Description

[0038] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. The above and other features and advantages will become more apparent to those skilled in the art from the detailed description of exemplary embodiments with reference to the accompanying drawings, in which:

[0039] Figure 1 This is a simplified structural diagram of the vehicle monitoring system provided in an embodiment of the present invention;

[0040] Figure 2 A partial schematic diagram of the circuit structure of the trigger array and control unit provided in an embodiment of the present invention;

[0041] Figure 3 A schematic diagram of the circuit structure of the triggering unit and the control unit provided in an embodiment of the present invention;

[0042] Figure 4 The diagram shows the trigger signal waveforms generated by the pressure-sensing film under different external pressures and the corresponding output signal waveforms of the comparator, as provided in this embodiment of the invention.

[0043] Figure 5 This is a schematic diagram of the membrane structure of the pressure-sensing film provided in an embodiment of the present invention. Detailed Implementation

[0044] To enable those skilled in the art to better understand the technical solutions of the present invention, exemplary embodiments of the present invention are described below in conjunction with the accompanying drawings, including various details of the embodiments of the present invention to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present invention. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0045] Where there is no conflict, the various embodiments of the present invention and the features thereof may be combined with each other.

[0046] As used herein, the term “and / or” includes any and all combinations of one or more related enumerated entries.

[0047] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein, the singular forms “a” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that when the terms “comprising” and / or “made of” are used in this specification, the presence of the stated feature, integral, step, operation, element, and / or component is specified, but the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof is not excluded. Terms such as “connected” or “linked” are not limited to physical or mechanical connections but can include electrical connections, whether direct or indirect.

[0048] Unless otherwise specified, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having the meaning consistent with their meaning in the context of the relevant art and the invention, and will not be interpreted as having an idealized or overly formal meaning unless expressly so defined herein.

[0049] like Figure 1 As shown, an embodiment of the present invention provides an in-vehicle monitoring system, which includes a pressure-sensing membrane 1, a control unit 2, and an image acquisition unit 3.

[0050] The pressure-sensing membrane 1 is attached to the vehicle surface, and the control unit 2 is electrically connected to the pressure-sensing membrane 1. The pressure-sensing membrane 1 sends a trigger signal to the control unit 2 when subjected to external pressure F. The control unit 2 determines the corresponding force location based on the received trigger signal, thus identifying the location of the pressure on the vehicle surface. An image acquisition unit 3 is electrically connected to the control unit 2. The image acquisition unit 3 acquires environmental images of the corresponding area based on the force location determined by the control unit 2, thereby capturing environmental images near the pressure location on the vehicle surface and recording events occurring near the vehicle surface when pressure is applied. Specifically, the control unit 2 can be located on the side of the pressure-sensing membrane 1 closer to the vehicle surface, i.e., further away from the external environment, to reduce the risk of damage to the control unit 2 due to impact or pressure. For example, the image acquisition unit 3 may include multiple cameras distributed at different locations on the vehicle. When the control unit 2 determines the force location, the cameras near the force location can be turned on to acquire environmental images of the corresponding area, while other cameras can remain off or in standby mode, thereby reducing the overall power consumption of the image acquisition unit 3.

[0051] The vehicle monitoring system proposed in this embodiment of the invention identifies external pressure F by attaching a pressure-sensing film 1 to the vehicle surface. This allows the image acquisition unit 3 to acquire environmental images only when the vehicle is subjected to external pressure F, and not to continuously acquire environmental images or acquire environmental images when an object or person is nearby. Since the absence of external pressure F on the vehicle surface means that the vehicle is highly unlikely to be damaged by external force, there is no need to acquire environmental images. Therefore, the vehicle monitoring system proposed in this embodiment of the invention can greatly reduce the unnecessary image acquisition work of the image acquisition unit 3, thereby acquiring environmental images in a timely manner when the vehicle may be damaged. It can also significantly reduce the power consumption of the image acquisition unit 3 and reduce the storage space occupied by the acquired environmental image information.

[0052] Specifically, taking the case of a vehicle parked in a high-traffic area as an example, if pedestrians frequently pass by the vehicle without touching its surface, the image acquisition unit 3 will not collect environmental images; however, if a pedestrian touches the vehicle's surface, the image acquisition unit 3 will promptly collect environmental images of the corresponding touched area, thus enabling timely collection of environmental images when the vehicle may be damaged, for subsequent retrieval and verification.

[0053] In some related technical solutions, vehicle-mounted radar equipment is typically used to monitor the vehicle's surrounding environment. Specifically, in areas with high pedestrian or vehicular traffic, the vehicle-mounted radar equipment frequently detects objects or people approaching and triggers recording equipment to capture environmental images. This results in frequent triggering of the recording device, leading to unnecessary consumption of vehicle power. More importantly, since the vehicle-mounted radar system can only sense the approach of objects and cannot determine whether the vehicle has actually suffered physical damage, the system may repeatedly start recording due to false alarms even when the vehicle is not damaged, further exacerbating power waste. If the vehicle is actually damaged, there is a risk that the storage medium may be filled with a large number of invalid false alarm recordings, leaving no space for new recordings, thus preventing the preservation of crucial evidence recordings. Therefore, compared to related technical solutions, the vehicle-mounted monitoring system proposed in this invention consumes less power and can significantly reduce the risk of crucial evidence recordings not being preserved.

[0054] In some embodiments, such as Figure 2 and Figure 5 As shown, the pressure-sensing film 1 includes a base layer 11 and a trigger array 12. The trigger array 12 is disposed on the base layer 11; the trigger array 12 includes multiple trigger units 121 arranged in an array, so that the multiple trigger units 121 can be distributed throughout the vehicle surface; the trigger units 121 emit trigger signals in response to external pressure; the control unit 2 is used to determine the position of the corresponding trigger unit 121 based on the received trigger signals, thereby determining the force-bearing location.

[0055] It should be noted that the "array arrangement" mentioned in this application refers to the arrangement of multiple trigger units 121 in two different directions when the pressure sensing film 1 is in a flat state. Specifically, when the pressure sensing film 1 is attached to the vehicle surface, the shape of the pressure sensing film 1 will change with the vehicle surface. Correspondingly, the arrangement direction of the trigger units 121 in space may be multiple directions, but in the dimension parallel to the pressure sensing film 1, the multiple trigger units 121 are still arranged in an array.

[0056] Preferably, each triggering unit 121 emits a trigger signal in response to external pressure.

[0057] In some embodiments, such as Figure 2 As shown, the trigger array 12 also includes multiple drive lines 122 and multiple acquisition lines 123. Each row of trigger units 121 is connected to at least one drive line 122; each column of trigger units 121 is connected to at least one acquisition line 123. The control unit 2 is electrically connected to the multiple drive lines 122 and provides scan drive signals to the multiple rows of trigger units 121 through the drive lines 122 to drive the trigger array 12 row by row, thereby further reducing power consumption. The control unit 2 is electrically connected to the multiple acquisition lines 123 and receives trigger signals from a corresponding column of trigger units 121 through the acquisition lines 123. It can be seen that the trigger signal is generated when the trigger unit 121 receives a drive signal and is subjected to external pressure.

[0058] In some embodiments, such as Figure 3 As shown, the trigger unit 121 includes a thin-film transistor (TFT) Q, a voltage divider resistor R2, and a thin-film piezoresistive resistor R1. The gate of TFT Q is electrically connected to the drive line 122, and the first terminal of TFT Q is electrically connected to the external constant voltage power supply VDD. Specifically, when the drive signal scans to the TFT Q in the corresponding row, the gate of TFT Q receives the drive signal, and the first and second terminals of TFT Q are connected, so that the potential of the second terminal of TFT Q is consistent with the potential of the external constant voltage power supply VDD. The voltage divider resistor R2 and the thin-film piezoresistive resistor R1 are connected in series between the second terminal of TFT Q and the ground line. The thin-film piezoresistive resistor R1 is used to change its own resistance value in response to external pressure. Thus, when the resistance of the thin-film piezoresistive resistor R1 changes, the voltage divider U1 across it will also change accordingly. For details, please refer to [reference needed]. Figure 4The greater the external force on the thin-film piezoresistive resistor R1, the greater its deformation. The greater the deformation of R1, the greater its resistance. Conversely, the greater the resistance of R1, the greater the voltage drop U1 across it. Therefore, the voltage level U1 across R1 is positively correlated with the magnitude of the external pressure on the trigger unit 121. The acquisition line 123 is connected between the voltage divider resistor R2 and the thin-film piezoresistive resistor R1 to acquire the voltage drop U1 of R1, i.e., the trigger signal. Correspondingly, the trigger signal level is positively correlated with the magnitude of the external pressure on the trigger unit 121.

[0059] Optionally, the thin-film piezoresistive resistor R1 can be a flexible resistive pressure-response element, which can deform under external pressure and thus change its resistance accordingly due to its deformation.

[0060] Optionally, the flexible resistive pressure-response sheet can be a flexible organic material or a flexible inorganic material that can respond to pressure and produce changes in electrical properties.

[0061] Preferably, each trigger unit 121 includes a thin-film transistor Q, a voltage divider resistor R2, and a thin-film voltage transformer R1.

[0062] In some embodiments, the control unit 2 includes a calculation module 21, a driving module 22, and a data acquisition module 23. The driving module 22 sequentially provides driving signals to multiple driving lines 122 to drive the trigger array 12 row by row. The data acquisition module 23 is connected to multiple acquisition lines 123 and is used to acquire trigger signals column by column. The calculation module 21 calculates the position of the trigger unit 121 that issued the trigger signal based on the trigger signals acquired by the acquisition module 23 and the corresponding driving signals.

[0063] Specifically, such as Figure 4 As shown, the timing of the driving signal can indicate which row the trigger unit 121 that issues the trigger signal is in, and the timing of the trigger signal received by the acquisition module 23 can indicate which column the trigger unit 121 that issues the trigger signal is in. Based on these two signal characteristics, the position of the trigger unit 121 that issues the trigger signal can be calculated.

[0064] In some embodiments, the control unit 2 is further configured to compare the level of the trigger signal with that of a preset comparison signal. If the level of the trigger signal is lower than that of the preset comparison signal, the trigger signal is determined to be invalid. If the level of the trigger signal is greater than or equal to that of the preset comparison signal, the position of the trigger unit 121 that issued the trigger signal is calculated. Since the level of the trigger signal is positively correlated with the magnitude of the external pressure on the trigger unit 121, by comparing the magnitude of the trigger signal with the preset comparison signal, trigger signals with lower levels can be effectively filtered out. This avoids triggering the image acquisition unit 3 when the trigger unit 121 is subjected to external pressures such as light touch of a finger or splashing raindrops that will not damage the vehicle. This further reduces unnecessary acquisition work by the image acquisition unit 3, thereby further reducing the power consumption of the image acquisition unit 3.

[0065] In some specific embodiments, such as Figure 3 and Figure 4 As shown, the control unit 2 also includes a comparator 24. The comparator 24 has two comparison terminals and one output terminal; one comparison terminal of the comparator 24 is connected to the acquisition module 23 to receive the trigger signal acquired by the acquisition module 23; a preset comparison signal Uref is applied to the other comparison terminal of the comparator 24; specifically, the calculation module 21 can provide the preset comparison signal Uref to the comparison terminal of the comparator 24 so as to flexibly adjust the preset comparison signal Uref.

[0066] Comparator 24 compares the levels of signals received at its two comparison terminals, specifically comparing the level of the trigger signal with the level of the preset comparison signal Uref. When the comparison result indicates that the level of the trigger signal is greater than or equal to the level of the preset comparison signal Uref, the output signal U0 of comparator 24 is a high-level signal. Specifically, when the output signal U0 is high, its level is consistent with the power supply voltage Ucc of comparator 24. When the comparison result indicates that the level of the trigger signal is less than the level of the preset comparison signal Uref, the output signal U0 of comparator 24 is a low-level signal. Calculation module 21, in response to receiving the high-level signal output from comparator 24, calculates the position of the trigger unit 121 that issued the trigger signal, thereby causing the image acquisition unit 3 to acquire the environmental image of the corresponding area. Conversely, when calculation module 21 receives the low-level signal output from comparator 24, it does not calculate the position of the trigger unit 121 that issued the trigger signal, thus avoiding triggering the image acquisition unit 3.

[0067] It should be noted that since the pressure-sensing film 1 is attached to the vehicle surface, the deformation of the film piezoresistive resistor R1 is affected not only by the magnitude of the external pressure but also by the strength and elasticity of the vehicle shell material. Therefore, when the pressure-sensing film 1 is attached to the surface of different vehicles, the deformation of the film piezoresistive resistor R1 may be different under the same external pressure conditions. Correspondingly, the trigger signal level generated by the trigger unit 121 will also be different. To address this issue, the preset comparison signal Uref applied to the second input terminal of the comparator 24 can be adjusted to make the trigger pressure reach the desired preset pressure threshold, thereby preventing the image acquisition unit 3 from missing data acquisition and avoiding unnecessary increases in the acquisition frequency of the image acquisition unit 3. In this way, for different vehicles, when the pressure-sensing film 1 is subjected to external pressure reaching the preset pressure threshold, the image acquisition unit 3 can be triggered. In other words, the comparator 24 provided in this embodiment of the invention enables the vehicle monitoring system to flexibly adapt to different vehicles.

[0068] Based on the above embodiments, the present invention also provides a workflow for an in-vehicle monitoring system, specifically including the following steps:

[0069] S1: The drive module 22 scans the drive signal line by line to the multiple drive lines 122 so that the multiple thin film transistors Q are turned on line by line;

[0070] S2: The acquisition module 23 acquires the trigger signal column by column through multiple acquisition lines 123 and transmits the acquired trigger signal to the comparator 24;

[0071] S3: Comparator 24 compares the trigger signal with the preset comparison signal. If the trigger signal is lower than the preset comparison signal, it sends a low-level signal to the calculation module 21 so that the calculation module 21 does not perform subsequent calculations. If the trigger signal is higher than the preset comparison signal, it sends a high-level signal to the calculation module 21 so that the calculation module 21 performs subsequent calculations, i.e., continues to step S4.

[0072] S4: The calculation module 21 calculates the position of the triggering unit that issued the triggering signal based on the timing of the triggering signal collected by the acquisition module 23 and the timing of the driving signal issued by the driving module 22, and controls the image acquisition unit 3 to collect the environmental image of the corresponding area.

[0073] In some embodiments, the control unit 2 is further configured to determine whether the number of trigger signals received within a preset time period reaches a preset threshold. If so, multiple trigger signals are determined to be invalid signals to prevent the image acquisition unit 3 from being triggered. Specifically, in special weather scenarios such as rain or sandstorms, a large number of different points on the pressure sensing film 1 will be subjected to external pressure simultaneously in a short period of time. Therefore, the method proposed in this embodiment, which determines whether the number of trigger signals received within a preset time period reaches a preset threshold, can effectively prevent the image acquisition unit 3 from being frequently triggered in long-term special weather scenarios, thus avoiding the depletion of the vehicle monitoring system's power.

[0074] Specifically, the preset duration and preset quantity thresholds can be set according to the climate conditions of the region where the vehicle is located.

[0075] In some embodiments, such as Figure 5 As shown, the trigger array 12 includes a first sub-layer 12a and a second sub-layer 12b; the thin-film transistor Q of the trigger unit 121 is distributed in the first sub-layer 12a; the thin-film piezoresistive resistor R1 of the trigger unit 121 is distributed in the second sub-layer 12b; the thin-film transistor Q and the thin-film piezoresistive resistor R1 in the same trigger unit 121 are electrically connected through interlayer conductive lines.

[0076] Preferably, the thin-film transistors Q of all trigger units 121 are distributed in the first sub-layer 12a; and the thin-film piezoresistors R1 of all trigger units 121 are distributed in the second sub-layer 12b.

[0077] Optionally, the trigger array 12 may also include a third sub-layer 12c, which is disposed on the outer periphery of the first sub-layer 12a and the second sub-layer 12b and adjacent to the first sub-layer 12a and the second sub-layer 12b. Multiple drive lines 122 and multiple acquisition lines 123 may be distributed in the third sub-layer 12c.

[0078] In some embodiments, the pressure-sensing film 1 further includes an encapsulation layer 13. A trigger array 12 is disposed on one side surface of the base layer 11; the encapsulation layer 13 covers the side surface of the trigger array 12 away from the base layer 11 to protect the trigger unit 121, as well as the multiple drive lines 122 and acquisition lines 123 in the trigger array 12.

[0079] Optionally, the pressure-sensitive film 1 can be used as a car cover.

[0080] Optionally, the aforementioned encapsulation layer 13 can be a colored film to provide users with different color options, thereby improving the overall aesthetics of the vehicle when the pressure-sensing film 1 is attached to the vehicle surface.

[0081] Optionally, the pressure-sensing film 1 also includes an adhesive layer 14, which is located between the trigger array 12 and the base layer 11, and is used to bond and fix the trigger array 12 to the base layer 11.

[0082] Optionally, the adhesive layer can be made of an adhesive containing polyimide (PI adhesive).

[0083] This document has described exemplary embodiments, and while specific terminology has been used, it is intended and should be interpreted only in a general illustrative sense and is not intended to be limiting. In some instances, it will be apparent to those skilled in the art that features, characteristics, and / or elements described in conjunction with particular embodiments may be used alone, or in combination with features, characteristics, and / or elements described in conjunction with other embodiments, unless otherwise expressly indicated. Therefore, those skilled in the art will understand that various changes in form and detail may be made without departing from the scope of the invention as set forth in the appended claims.

Claims

1. A vehicle-mounted monitoring system, characterized in that, Includes a pressure-sensing membrane, a control unit, and an image acquisition unit; The pressure-sensing membrane is attached to the vehicle surface, and the control unit is electrically connected to the pressure-sensing membrane. The pressure-sensing membrane is used to send a trigger signal to the control unit when it is subjected to external pressure, and the control unit is used to determine the corresponding force location based on the received trigger signal. The image acquisition unit is electrically connected to the control unit, and the image acquisition unit is used to acquire environmental images of the corresponding area based on the force position determined by the control unit.

2. The vehicle-mounted monitoring system according to claim 1, characterized in that, The pressure-sensing film includes a base layer and a trigger array; The trigger array is disposed on the base layer; The trigger array includes multiple trigger units arranged in an array, and the trigger units are used to emit the trigger signal in response to external pressure; The control unit is used to determine the corresponding position of the trigger unit based on the received trigger signal.

3. The vehicle-mounted monitoring system according to claim 2, characterized in that, The trigger array also includes multiple drive lines and multiple acquisition lines; Each row of trigger units is connected to at least one drive line; each column of trigger units is connected to at least one acquisition line. The control unit is electrically connected to the multiple drive lines and is used to provide scan drive signals to the multiple rows of trigger units through the multiple drive lines; The control unit is electrically connected to multiple acquisition lines and is used to receive trigger signals from the corresponding trigger units via the acquisition lines.

4. The vehicle-mounted monitoring system according to claim 3, characterized in that, The control unit includes a computing module, a driving module, and a data acquisition module; The driving module is used to sequentially provide the driving signals to the multiple driving lines; The acquisition module is connected to multiple acquisition lines for acquiring the trigger signals column by column; The calculation module is used to calculate the position of the triggering unit that issued the triggering signal based on the triggering signal acquired by the acquisition module and the corresponding driving signal.

5. The vehicle-mounted monitoring system according to claim 4, characterized in that, The control unit is also used to compare the level of the trigger signal with the level of the preset comparison signal. If the level of the trigger signal is less than the level of the preset comparison signal, the trigger signal is determined to be an invalid signal. If the level of the trigger signal is greater than or equal to the preset comparison signal, the position of the triggering unit that issued the trigger signal is calculated.

6. The vehicle-mounted monitoring system according to claim 5, characterized in that, The control unit also includes a comparator; The comparator has two comparison terminals and one output terminal; one comparison terminal of the comparator is connected to the acquisition module to receive the trigger signal acquired by the acquisition module; the other comparison terminal of the comparator is supplied with the preset comparison signal. The comparator is used to compare the level of the trigger signal with the level of the preset comparison signal, and outputs a high-level signal when the level of the trigger signal is greater than or equal to the level of the preset comparison signal, and outputs a low-level signal when the level of the trigger signal is less than the level of the preset comparison signal. In response to receiving a high-level signal output by the comparator, the calculation module calculates the position of the triggering unit that issued the trigger signal.

7. The vehicle-mounted monitoring system according to claim 3, characterized in that, The triggering unit includes a thin-film transistor, a voltage divider resistor, and a thin-film piezoresistive resistor. The gate of the thin-film transistor is electrically connected to the driving line; the first electrode of the thin-film transistor is electrically connected to an external constant voltage power supply. The voltage divider resistor and the thin-film piezoresistive resistor are connected in series between the second electrode of the thin-film transistor and the ground wire; the thin-film piezoresistive resistor is used to change its own resistance value in response to external pressure; The acquisition line is connected between the voltage divider resistor and the thin-film piezoresistive resistor to acquire the trigger signal.

8. The vehicle-mounted monitoring system according to claim 7, characterized in that, The trigger array includes a first sub-layer and a second sub-layer; The thin-film transistors of the trigger unit are distributed in the first sub-layer; The thin-film piezoelectric resistor of the trigger unit is distributed in the second sub-layer; The thin-film transistor and the thin-film piezoresistor in the same trigger unit are electrically connected through interlayer conductive lines.

9. The vehicle-mounted monitoring system according to claim 1, characterized in that, The control unit is also used to determine whether the number of trigger signals received within a preset time period reaches a preset number threshold. If so, the multiple trigger signals are all determined to be invalid signals.

10. The vehicle-mounted monitoring system according to claim 2, characterized in that, The pressure-sensing film also includes an encapsulation layer; The trigger array is disposed on one side surface of the base layer; The encapsulation layer covers the surface of the trigger array on the side away from the base layer.

Images