Vehicle safety device

Abstract

An in-vehicle safety device (100) mountable to a rear surface of a rearview mirror of a vehicle, comprising a first image capture device (102) for receiving a plurality of images in a first direction (104) relative to the safety device, a second image capture device (108) towards a second direction (112), the second direction being different from the first direction, and a first object detection module (130) for detecting the presence of an object outside the vehicle to which the security device can be mounted, in which the first image capture device and the second image capture device are arranged to start capturing a plurality of images and / or films in response to the first object detection module detecting the presence of the object outside the vehicle, and wherein the second image capture device is arranged to contain a field of view extending beyond the rearview mirror into the cabin of the vehicle.

Description

Technical Field

[0001] The present invention relates to a system for providing a security camera, and more particularly, but not exclusively, to a vehicle security camera that can be installed in a vehicle. Existing technology

[0002] Onboard cameras, more generally known as in-vehicle digital video recorders (DVRs), are sometimes referred to as dashcams because they are mounted on or near the vehicle's dashboard. They are becoming increasingly popular and are often installed by users after the vehicle is manufactured as aftermarket or custom parts. Rearward-facing cameras are also used and can be mounted next to or on the rear window to provide a view through the vehicle's rear window.

[0003] Other examples of aftermarket products that can be used in vehicles include in-vehicle head unit systems, which provide processing power to a variety of external modular peripheral sensors. Such interface devices include reversing sensors, screens, lights, radios, and other devices. These in-vehicle head unit systems are independent and separate units from the interface devices, and usually require professional technicians to install and calibrate, and sometimes even require the vehicle to be modified to accommodate the head unit. For example, some head units are installed in the vehicle's glove box or other hidden areas in the vehicle and require drilling holes in the body to install. Such modifications cannot be reversed and often put users off in the first place. In addition, the installation requires professional technicians, which may also reduce the likelihood of users installing the device in their vehicles.

[0004] Typically, dashcams record the driving experience while a vehicle is in motion, providing a degree of driver / user liability protection by recording adverse events and providing evidence. For example, in the event of a traffic accident, the recorded data may be used in subsequent investigations. Increasingly, dashcam footage is being used as evidence in some courts.

[0005] However, when a vehicle is unattended, there is still a risk of damage, break-in or theft, but dashcams are usually not enabled when the vehicle is stationary due to power consumption, battery depletion and technical implementation concerns.

[0006] Various aspects and embodiments of the present invention are designed in consideration of the above-mentioned circumstances. Summary of the Invention

[0007] According to one aspect of the present invention, a vehicle-mounted safety device is provided that can be mounted on the rear surface of a rearview mirror of a vehicle, comprising: a first portion configured to be mountable on a surface rearward of the vehicle's rearview mirror; a second portion rotatably coupled to the first portion; the second portion comprising: a first image capture device configured to receive an image in a first direction relative to the first portion; a second image capture device facing a second direction, the second direction being different from the first direction; a first object detection module configured to detect the presence of an object outside the vehicle on which the safety device can be mounted; wherein the first image capture device and the second image capture device are arranged to begin capturing images and / or videos in response to the first object detection module detecting the presence of an object outside the vehicle on which the safety device can be mounted; and wherein the second image capture device is configured to include a field of view extending beyond the rearview mirror to within the cabin of the vehicle.

[0008] The interaction between the security device's two image capture devices and the object detection module allows the security device to operate in different power modes. For example, the object detection module can enable both image capture modules to shut down at specific times to minimize power consumption, as the object detection module uses less power. If the object detection module detects a person entering the safety perimeter surrounding the vehicle, the device can begin recording image and / or video using one of the two object detection modules, augmenting the captured data.

[0009] Furthermore, the second image capture device provides a field of view covering the interior of the vehicle cabin and can be fixed to a surface that can be mounted behind the vehicle's rearview mirror. For example, the security device can be discreetly mounted on the vehicle's windshield, behind the rearview mirror, while the second image capture device extends beyond the rearview mirror into the vehicle cabin. This minimizes the security device's footprint in the driver's field of view, thereby minimizing obstruction of the driver's field of view. Simultaneously, the second image capture device can record images and / or video of areas such as the sides of the vehicle and the interior. These side areas can be where intruders might attempt to enter the vehicle, and recording images of these areas is key to improving vehicle safety.

[0010] Optionally, the vehicle-mounted safety device includes a second object detection and ranging module to detect the presence of objects outside the vehicle in which the safety device may be installed. This increases the field of view of the safety device's object detection capability and expands the area in which objects can be detected.

[0011] Optionally, the first and second object detection modules of the in-vehicle safety system are configured to have fields of view that overlap with the first image capture device. When an object detection module with a detection range of approximately 180 degrees is used, the overlap of the fields of view of the two object detection modules provides a stronger signal in the overlapping area. If the fields of view do not overlap, there will be gaps in the object detection coverage, resulting in "blind spots" in object detection. The combined fields of view of the object detection modules overlap with the field of view of the first image capture device, allowing the first image capture device to record an object when it is detected. Generally speaking, when the first image capture device is pointed toward the front of the vehicle on which it is installed, object detection is also improved in this direction.

[0012] Optionally, the first object detection module is oriented at a first angle relative to the field of view of the first imaging module, and the second object detection module is oriented at a second angle relative to the field of view of the first imaging module, the second angle being different from the first angle.

[0013] Optionally, the first angle and the second angle are equal and opposite.

[0014] Optionally, the first object detection module and the second object detection module each include at least one signal transmitter for transmitting an object ranging signal; and at least two signal receivers in each of the at least one signal transmitter for receiving reflections of the transmitted object ranging signal; wherein the at least one signal transmitter and the at least two signal receivers used in each of the at least one signal transmitter are arranged relative to each other to reduce reflections of the object ranging signal transmitted from a surface of a protective component, the protective component being located near the at least one signal transmitter and through which the transmitted signal passes.

[0015] Optionally, the security device further includes a housing, and the signal transmitter is arranged to minimize signal obstruction by features of the housing. Object detection signals may be attenuated by housing features, such as ribs, corners, and bevels, and minimizing signal obstruction may provide a stronger signal transmission, thereby being received by the object detection module.

[0016] Optionally, the signal transmitter is positioned at a distance from the inner surface of the housing to minimize destructive interference of the housing with the signal. By positioning the signal transmitter at a distance such that any internal reflections of the signal do not destructively interfere with the transmitted object detection signal, destructive interference with the object detection signal can be minimized. Consequently, a stronger signal is transmitted, and object detection is improved.

[0017] Optionally, the distance is 0.6 mm. This distance is an optimal distance for the type of object detection module used in the security device.

[0018] Optionally, the in-vehicle security device can be configured to connect to a second device, allowing image and motion data captured on the second device to be transmitted to the first device. The ability to be coupled to a second auxiliary device allows data to be shared between the two devices and provides a zone within and around the vehicle where security threats can be detected. This means 360-degree motion detection can be provided around the vehicle.

[0019] Optionally, the motion detection and ranging module is a radar module. The radar module provides object detection and ranging capabilities, enabling the safety device to accurately detect the presence and location of objects, such as detecting approaching pedestrians when the vehicle is stationary.

[0020] Optionally, the onboard security system includes an inertial measurement unit. This provides detection of vehicle movement, for example when someone attempts to break into the vehicle or lift it to remove valuable components from underneath. Vehicle movement can be an indicator of a safety risk.

[0021] Optionally, the vehicle's safety device is configured to operate in a high-power state or a low-power state in response to an indication of a safety threat from the inertial measurement unit. This can have the advantage that the safety device can be in a low-power mode when stationary to conserve energy (i.e., not activating the video device / camera), but can be "woken up" if the inertial measurement unit detects vehicle movement.

[0022] Optionally, the in-vehicle safety device further includes a memory device and / or a data transfer unit; wherein the memory device stores measurement data from the first image capture device, the second image capture device, the first object detection module, and the second object detection module on a memory card, and transmits the measurement data to an external device in response to an indication of a security threat. The safety device can be configured to store the data recorded on the storage device (e.g., a memory card) and transmit the data to the external device via the data transmission unit (e.g., a 4G transmitter) when the inertial measurement unit detects a security threat.

[0023] Optionally, the second image capture device of the first device is a wide-angle lens. The wide-angle lens provides a field of view that covers not only the interior of the vehicle's cabin area, but also areas outside the vehicle, such as through the side windows. This means that video and / or images of people approaching the side of the vehicle can be captured.

[0024] Optionally, the vehicle safety device is configured to be rotatably mounted on the rear surface of the vehicle rearview mirror. This provides an angle adjustment of the device relative to the mounting surface (such as a windshield), thereby increasing the flexibility of the mounting position and location.

[0025] In a second aspect of the present invention, there is provided a mount attachable to a rear surface of a vehicle rearview mirror and configured to rotatably couple the in-vehicle safety device according to the first aspect to the mount.

[0026] In a third aspect of the present invention, there is provided an assembly comprising the mounting base according to the second aspect and the vehicle-mounted safety device according to the first aspect rotatably mounted to the mounting base.

[0027] In a fourth aspect of the present invention, there is provided a vehicle comprising the safety device of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] According to various aspects of the present invention, one or more specific embodiments will be described, by way of example only, with reference to the following drawings, in which:

[0029] Figure 1 A general overview of an in-vehicle safety system according to one or more embodiments of the present invention is shown;

[0030] Figure 2 A plan view of a vehicle viewed from above according to one or more embodiments of the present invention is shown;

[0031] Figure 3a 、 Figure 3b and Figure 3c depicts different orthographic views of a first device of an in-vehicle safety system according to one or more embodiments of the present invention;

[0032] Figure 4a and Figure 4b depicts different orthographic views of a second device of an in-vehicle safety system according to one or more embodiments of the present invention;

[0033] Figure 5 is an illustrative block diagram of a first device and a second device of an in-vehicle safety system according to one or more embodiments of the present invention;

[0034] Figure 6 is a schematic top view illustrating a first device and a second device of an in-vehicle safety system according to one or more embodiments of the present invention;

[0035] Figure 7 Department Display Figure 6 Schematic diagram of the direction axis;

[0036] Figure 8 A top view of a vehicle showing one or more radar coverage areas according to one or more embodiments of the present invention;

[0037] Figure 9 a top view of a vehicle showing one or more radar coverage areas according to one or more embodiments of the present invention; and

[0038] Figure 10is an illustrative diagram showing the relative positions of some components of a first device of an in-vehicle safety system according to one or more embodiments of the present invention. DETAILED DESCRIPTION

[0039] Figure 1 This is an illustrative diagram showing a general overview of a security system 10 for use in a vehicle (e.g., an automobile) according to one embodiment of the present invention. Hereinafter, it will be referred to as "security system 10." Security system 10 includes a first device 100 electrically connected to an optional second device 200 via a wired connection 300. Wired connection 300 is a detachable electrical connection, meaning that first device 100 and second device 200 can be detachably connected to each other.

[0040] The wired connection 300 between the first device 100 and the second device 200 comprises an electromechanical coupling, whereas the wireless connection is terminated mechanically with an electrical connector that mechanically engages the respective devices 100 and 200, for example, through friction between connecting pins and corresponding sockets, allowing data and power to be transferred between the devices. When coupled with the first device 100, the second device 200 receives power from the first device 100 via the electromechanical coupling 300 and can transmit captured data to the first device 100 via the electromechanical coupling 300.

[0041] Safety system 10 typically includes one or more sensors capable of video recording, audio recording, acceleration sensing, and radar detection in a single "aftermarket" system that can be retrofitted into a vehicle. These sensors are configured to capture data from both the interior of the vehicle (e.g., the cabin) and the external area surrounding the vehicle. This external area can extend several meters beyond the vehicle's exterior to monitor its surroundings, similar to a safety zone. The extent of the external area is a design choice, but technicians should consider sufficient range to detect potential threats while reducing false alarms due to normal movement (such as pedestrians, bicycles, or other vehicular traffic that may pass by the vehicle).

[0042] In this regard, the outer zone can extend several meters outside the vehicle. For example, if only the immediate area of the vehicle needs to be monitored (e.g., when the vehicle is parked on the side of the road and other vehicles and pedestrians are passing by), the outer zone can extend to approximately 1 meter. Alternatively, in environments with low vehicle or pedestrian traffic (e.g., parking lots), an outer zone extending to 2 to 3 meters or so may be more appropriate. If the vehicle is parked in an open area for an extended period of time, a larger outer zone (e.g., extending from 3 to 10 meters, or even more) may be more appropriate.

[0043] According to one or more embodiments of the present invention, a user may be provided with an option to select the range of an external area, for example, based on the environment in which the vehicle is parked.

[0044] Positioning Definition

[0045] To help understand the installation positions of the first device 100 and the second device 200 in the vehicle, refer to Figure 2 , Figure 2 Schematic diagram of vehicle 80 viewed from above. A first device is located at the front of vehicle 80, with its front surface (not shown) facing in the direction indicated by arrow 104, toward the exterior area in front of the vehicle where the first device can be installed. A rear surface (not shown), opposite to the front surface, of first device 100 faces in the direction indicated by arrow 112, toward the interior area of the vehicle, sometimes referred to as the cabin area or vehicle cabin direction. Rear device 200 is installed at the rear of vehicle 80, with its front surface (not shown) facing in the direction indicated by arrow 92, i.e., toward the exterior area behind vehicle 80.

[0046] First device 100

[0047] Figure 3a 、 Figure 3b and Figure 3c 1 and 2 are illustrative line diagrams showing external components of the first device 100 from different angles according to an embodiment of the present invention. The first device 100 is described with reference to these drawings.

[0048] The first device 100 is a dashcam device comprising a lower hanging portion 101 rotatably connected to a circular mounting end 103 via a connection point 105. The mounting end 103 of the device 100 is configured to be fixed to a vehicle's windshield (not shown). The angle of the hanging portion 101 can be adjusted by rotating the connection point 105. The mounting end 103 can be attached to a vehicle's windshield via an adhesive pad 107 (e.g., 3M TM The adhesive pad 107 is typically fixed to the windshield. However, if the user wishes to remove the first device 100, the adhesive pad 107 can be removed via the removable portion 109 of the mounting end 103. The first device 100 can be released or separated from the removable portion 109 by sliding (not shown), leaving the adhesive pad 107 fixed to the windshield.

[0049] The mounting end includes components that need to be aimed at the sky above the vehicle, such as the fourth-generation mobile communication technology / long-term evolution technology (4G / LTE) module and the global positioning system (GPS) module.

[0050] When in use, the hanging portion 101 holds the first image capturing device 102 facing in the direction 104 of the horizon, toward the exterior area in front of the vehicle. The inclination angle of the vehicle windshield varies depending on the type of vehicle, for example, the inclination angle of buses and trucks is close to 90 degrees relative to the ground, while the inclination angle of cars, especially sports cars, is close to 45 degrees to 70 degrees. To accommodate this change, the rotation angle 160 between the hanging portion 101 and the mounting end 103 can be adjusted within a range of 90 degrees. One limit is when the front surface 106 of the first device 100 is substantially parallel to the plane of the adhesive pad 107; the other limit is when the front surface 106 of the first device 100 is perpendicular to the plane of the adhesive pad 107 (i.e. Figure 3b The angle α shown in is approximately the midpoint of the 90 degree range).

[0051] The rotatable nature of the hanging portion 101 relative to the mounting end 103 enables the device 100 to be mounted on a variety of different vehicles while maintaining good visibility of the horizon to the area outside in front of the vehicle.

[0052] As previously mentioned, first device 100 is a dashcam device having a first image capture device 102 (sometimes referred to as "first camera 102") disposed on a front surface 106 of device 100. First image capture device 102 faces a first direction 104 and an exterior area in front of a vehicle in which it may be installed. First camera 102 supports 4K resolution image data and video recording and has a field of view of up to 125 degrees in the first direction 104.

[0053] The first device 100 additionally includes a second image capture device 108 (sometimes referred to as a "cabin camera 108" or "second camera") located on a rear surface 110 of the device 100 and facing a second direction 112. The cabin camera 108 is generally facing the vehicle interior 112 and has a wide-angle lens with a 1440P resolution and a field of view of approximately 190 degrees. It can capture images and videos inside the vehicle cabin and extend to the exterior areas on both sides of the vehicle (e.g., Figure 2 As shown by arrow 94). Figure 3b As shown, the cabin camera 108 is angled downward relative to the axis of the first camera 102. The cabin camera 108 is located at the lower end of the hanging portion 101 (i.e., the portion farthest from the mounting end 103) so as to be as close to the center of the windshield as possible without obstructing the driver's field of view. Positioning the cabin camera 108 as low as possible vertically ensures that its field of view is not obstructed by the rearview mirror. Furthermore, the lower the cabin camera 108 is positioned, the wider the field of view outside the vehicle, as this field of view is not obstructed by the door frame, allowing the device 100 to capture images and video of people approaching the side of the vehicle. Of course, it is conceivable that increasing coverage on both sides of the cabin area, namely the doors and side windows, would enhance the security device's ability to detect and record attempts to enter the vehicle from those avenues.

[0054] As can be appreciated, the figures only illustrate the external lenses or lens barrels of the first image capture device 102 and the second image capture device 106. Both image capture devices may also include other components not shown, such as digital image capture sensors, focusing components (e.g., lenses, filters, and other optical components). Examples of digital image capture sensors include charge-coupled device (CCD) chips or complementary metal oxide semiconductor (CMOS) sensors.

[0055] The first device 100 also includes one or more vents 134 to facilitate air flow in and out of the device housing as a form of convection heat management. Other or additional heat management methods may be included in the first device 100, including heat sinks or cooling fins (not shown).

[0056] In some embodiments, the mounting end 103 may include a speaker 136 that can overcome background noise while the vehicle is moving and warn occupants or potential intruders. The first device may also include a memory card slot 140 for inserting a removable electronic data storage device, such as an SD card. TM card, flash memory card or other electronic data storage device.

[0057] Second device 200

[0058] Figure 4a and Figure 4b 1 and 2 are illustrative schematic diagrams showing external components of the second device 200 from different perspectives according to one or more embodiments of the present invention. The second device 200 of the security system 10 is described with reference to these figures.

[0059] like Figure 1 As mentioned in the description, the second device 200 is an optional auxiliary device that is electrically connected to the first device 100 via a wire. The second device 200 includes a diamond-shaped portion 400, which is rotatably connected to a circular mounting portion 402. The mounting portion 402 is similar to the circular mounting end 103 of the first device 100 and includes an adhesive pad portion 406 for fixedly mounting on a support structure, such as a rear windshield (not shown). The lower diamond-shaped portion 400 is movable relative to the mounting portion 402 to allow the user to adjust the field of view. This mobility is provided by a "ball and socket" joint 408, the arrangement of which is generally similar to the structure described in British Patent Application Nos. GB2582140A1 and GB2581850A1 and British Patent Gazette No. GB2581851 B 1.

[0060] The second device includes a third image capture device 410 (sometimes referred to as a "third camera 410" or a "rear-facing camera") having image capture and video recording capabilities. When mounted on a vehicle, the third image capture device 410 faces the exterior area 92 behind the vehicle (e.g., Figure 2 In one embodiment, the image capture device 410 has a 1440P resolution and a 125-degree field of view.

[0061] like Figure 1 As described above, the second device 200 can be detachably connected to the first device 100 via a wired connection, such as Figure 4b As shown in the wired connection 300.

[0062] When connected to the first device 100, the first camera 102, the cabin camera 108, and the third camera 410 form a multi-directional camera assembly, providing a 360-degree field of view encompassing virtually all of the vehicle's exterior and interior areas. Images and videos captured by the rear camera device can be transmitted to the front device via a wired connection 300 for storage and further processing.

[0063] Safety system components

[0064] Figure 5 is an illustrative block diagram showing more details of the internal and external components of the security system 10. The arrows in the figure represent data and / or power connections between the components. Figure 1 As described above, the security system 10 includes a first device 100 and a second device 200. In summary, Figure 5 The left-hand side of the first device 100 includes input components / sensors. In this embodiment, the first device includes a front camera 102, a rear camera 108, a motion detection and ranging module 502, a light sensor 504, a microphone unit 406, an inertial measurement unit (IMU) 508, and a global navigation satellite system (GNSS) receiver 510. Output components / interfaces are shown on the left-hand side of the first device 100. Figure 5 The right-hand side of the first device includes, but is not limited to, a speaker output 512, a 4G / LTE module 514, a Wi-Fi module 516, a communication port 518, a removable memory card slot 520, and a plurality of light-emitting diodes 522. The first device also includes various internal components, such as a processor 526, internal memory 528 (e.g., dynamic random access memory (RAM) or flash memory), and a digital signal processor (DSP) 531.

[0065] The motion detection and ranging module 502 also includes a microcontroller unit (MCU) 530 electrically connected to the processor 526, the inertial measurement unit 508, and the global navigation satellite system receiver 510. The microcontroller unit 530 controls a first radar unit 532 and a second radar unit 534, both of which are designed to detect the motion, speed, angle, and position of objects outside the vehicle on which the first device 100 is installed. Each of the first radar unit 532 and the second radar unit 534 ("radar units") includes a radar transmitter and two radar receiving antennas (not shown). The radio transmitter of each radar unit operates at 24 GHz and uses linear frequency modulated triangular pulses (commonly known as LFMCW) to achieve accurate radial distance measurement. The two receiving antennas in each radar unit are located at different spatial locations of the first device 100 to provide sufficient parallax between each pair of radar receivers. This allows the radar units to detect the distance to objects. In addition, the two receiving antennas allow for different angles of phase difference estimation, thereby providing sufficient data resolution to generate a 2D map of the vehicle's surroundings (see example in Figure 8 and Figure 9 (Detailed description see below).

[0066] The inertial measurement unit 508 is used to detect movement of the vehicle while it is stationary or moving. When stationary, the inertial measurement unit 508 can detect movement of the vehicle, such as when someone attempts to break into the vehicle or lift the vehicle to remove valuable components from the bottom. The advantage of this is that the security device can be in a low-power mode when stationary to save energy (i.e., the imaging device / camera is not activated), but will be "woken up" if the inertial measurement unit 508 detects movement. Once the security device detects movement of the vehicle, the more power-intensive camera and object detection device can be activated to record the event. Another option is that in low-power mode, the radar antenna can be operated to provide object detection around the vehicle and transmit information to a remote user device via a 4G connection when the inertial measurement unit 508 detects movement. This indicates a potential security threat.

[0067] The radar antenna 130 may be Figure 3a 、 Figure 3b and Figure 3c The antennas are visible and movable to accommodate various installation conditions. For example, the antennas can be rotated 90 degrees to accommodate objects such as rearview mirrors. The distance between the two antennas is set based on the transmitter frequency. In some embodiments, this distance is 60 millimeters (mm) to ensure sufficient ground for optimal performance.

[0068] The first device 100 is connected to a similar communication port 536 on the second device 200 (eg, Figure 6 Wired connection in Figure 5 and Figure 6 The wired connection 300 is shown between Figure 4a and Figure 4b In this embodiment, the second device is connected via a universal serial bus (USB) (eg Figures 3a to 3c 142 above) is connected to the first device.

[0069] Similar to the first device 100, the second device 200 of the security system 10 also includes a motion detection and ranging module 538. The module 538 further includes a radar module 540, which is controlled by a microcontroller unit 542. The third radar module 540 helps provide 360-degree motion detection and ranging coverage around the entire vehicle (see example in Figure 7 , described in detail below. In normal use, the second device is controlled by processor 544. However, when inactive and in a low-power mode, microcontroller unit 542 controls radar module 540 via channel 550. Channel 550 can be part of wired connection 300. In this embodiment, microcontroller unit 542 can communicate directly with microcontroller unit 530 during any low-power mode to "wake up" the security system when any motion is detected. Details are described in the corresponding patent application, filed under attorney's reference number P00552483GB.

[0070] The third radar module 540 also includes a wireless transmitter and two wireless receiving antennas (not shown in this figure), Figure 5 The motion detection and ranging module 502 is similar to that described in .

[0071] Additionally, the second device 200 includes an internal memory 546 , such as dynamic random access memory (DRAM) or flash memory (FLASH).

[0072] Positioning and angle of radar transmitter

[0073] A major challenge in installing radar transmitters and receivers inside a vehicle is dealing with obstructions such as window pillars, seats, and the vehicle's structure. These obstructions can block radar signals, resulting in blind spots in the two-dimensional maps generated by any of the three radar transmitters described previously.

[0074] Figure 6Schematic diagram of a first device 100 and a second device 200 viewed from above, according to one or more embodiments of the present invention; note that the shapes of the devices in the figure are not drawn to scale and are provided for reference only. The figure illustrates the relative positioning of the two devices during use, demonstrating the orientation of the radar transmitters. Specifically, the figure shows first radar transmitter 602 of first radar unit 532 and second radar transmitter 604 of second radar unit 534 superimposed on the device outline and positioned relative to the front camera. The positioning of the transmitters is illustrative; other internal components are not shown. First radar transmitter 602 and second radar transmitter 604 are oriented so that when the front surfaces of the cameras face the vehicle's front windshield (indicated by arrow 104), the fields of view of the two transmitters cover the front and sides of vehicle 80.

[0075] This effect is achieved by orienting the first radar transmitter 602 and the second radar transmitter 604 so that the front surfaces facing the transmitters are at an angle of less than 90 degrees relative to the direction 104 of the external area in front of the vehicle. In the figure, arrows 612 and 604 are perpendicular to the front surfaces of the first radar transmitter 602 and the second radar transmitter 604 respectively; the angles between line segments 601 and 604 and the front direction 104 are both less than 90 degrees. For clarity, as shown in FIG. Figure 7 As shown, the angles are labeled β and γ, both less than 90 degrees. The particular angle is 60 degrees relative to direction 104. This configuration directs the strongest signal toward the exterior of the vehicle rather than the interior of cabin area 112. The strongest signal is generally located in the center of the transmitter's field of view.

[0076] This is contrary to prior art concepts, which typically mount two radar transmitters back-to-back to maximize their field of view, creating a 180-degree angle in front of the transmitters. However, the orientation of the two transmitters back-to-back means the strongest signal could be directed toward the vehicle's window pillars or cabin area 112. It should be understood that either scenario is undesirable, as the number of obstructions increases the safety system's blind spots. Furthermore, the signal strength of the transmitters arranged back-to-back is limited at the periphery of the field of view, resulting in less effective motion detection in these areas. Having an angle with overlapping fields of view, as described, solves this problem.

[0077] The radar coverage obtained is as follows Figure 8 As shown, it shows the previous reference Figure 2Vehicle 80 is depicted, with illustrative fields of view of radar signals overlapping. When first device 100 is mounted in front of the vehicle as shown, the coverage area from first radar transmitter 602 is shown as field of view 802, while the coverage area from second radar transmitter 604 is shown as field of view 804 (or safety perimeter area). The relative orientation of first radar transmitter 602 and second radar transmitter 604 provides a 2D map of the area in front of and to the sides of the vehicle. This allows first device 100 alone to detect objects that fall within the coverage areas of both transmitters. The angular orientation of the two transmitters allows the two fields of view of the peripheral area in front of the vehicle to overlap sufficiently, allowing detection of objects that are sufficiently far in front of the vehicle. As described above, this also results in minimal radar signal strength being directed to the cabin area of the vehicle where it can be installed.

[0078] Now back Figure 6 , the second device 200 is shown as it is mounted so that its front surface is directly opposite the first device 100 and in a direction towards the rear of the vehicle to which it may be mounted (see arrows 92 and Figure 2 to discuss more about the relative positions at which the two devices may be mounted in a vehicle). Figure 5 As shown, third radio module 540 includes radar transmitter 610 , which transmits signals in direction 92 away from the rear of the vehicle. This is indicated by triangle 616 .

[0079] When the second device 200 is optionally added to the safety system 10, the radar coverage provided by the three transmitters (602, 604 and 610) surrounds the entire exterior area of the vehicle, forming a Figure 9 The security perimeter area shown. Figure 8 Similarly, like components are represented by like symbols. The additional radar coverage 912 provided by the radio transmitter 710 of the second device 200 means that objects behind the vehicle 92 will be detected. By ensuring that the fields of view of all radar transmitters overlap, this provides the user with 360-degree object detection and ranging coverage of the entire exterior area of the vehicle. The safety perimeter area can be several meters, for example, 5 meters.

[0080] Another issue with mounting radar transmitters in the first device 100 and the second device 200 is that the devices themselves (either through their housings or through internal components) block the transmitted radar signal. To address this issue, one embodiment of the present invention mounts the radio transmitters (602, 604, and 610) close to the housing of the respective device in which they are mounted. In one embodiment, the transmitters are placed 0.6 mm from the inside surface of the device housing. Figures 3a to 3c, the front side 106 of the housing of the hanging part 101 of the first device 100 includes a chamfered area 190 to match the aforementioned angles (β, γ) of the transmitter, while maintaining a distance of 0.6 mm between the inner surface of the housing and the front plane of the transmitter, i.e. the two surfaces are arranged relative to each other.

[0081] The relative position between the radar receiver and the radar transmitter

[0082] Figure 10 This diagram illustrates the relative positions of radar transmitter 702 and radar receiving antenna 1004 in first device 100, viewed from the side and opposite windshield 1002, according to another embodiment. Arrow 1006 indicates the direction in which first device 100, when installed in a vehicle, faces the roof, i.e., opposite the direction of gravity. This diagram is not drawn to scale, and perspective may vary.

[0083] In this embodiment, first radar transmitter 702 is located directly below one of its respective pair of radar receiving antennas 1004. Radar signal 1008 is transmitted by first radar transmitter 702 toward the exterior area in front of the vehicle in direction 104 and through windshield 1002. A portion of radar signal 1008 incident on the surface of windshield 1002 is reflected into the vehicle interior at an angle equal to the angle of incidence and propagated according to Snell's law. This phenomenon is known as backreflection, indicated by dashed arrow 1010 (herein referred to as backreflection 1010). Due to the characteristics of vehicle windshields, it is virtually impossible for the windshield to tilt more than 90 degrees (i.e., the upper edge of the windshield extends forward beyond the lower edge of the windshield). Therefore, placing radar transmitter 702 vertically below radar receiving antenna 1004 ensures that backreflection 1010 does not enter radar receiving antenna 1004. The reason is that due to the tilt of the windshield, back reflection 1010 is directed below radar transmitter 702, that is, in the direction indicated by arrow 1010. As long as the radar receiver is located directly above transmitter 710, the effect of reducing back reflection on radar receiving antenna 1004 will always be valid.

[0084] A particular advantage of this positional arrangement between radar transmitter 702 and radar receiver 1010 is that saturation of radar receiving antenna 1004 can be minimized.

[0085] It is worth noting that Figure 10 This is a simplified diagram, not showing any refraction effects caused by windshield 1010. It's also worth noting that only one of the pair of radar receiving antennas is shown, as this is sufficient to illustrate the effect of reducing antenna saturation by minimizing backreflections. Furthermore, only one of the two radar units (532 and 534) is shown to simplify the image. Of course, the above description applies equally to both radar units.

[0086] This application mentions that the safety system is used in a car. However, it must be understood that the safety system is not limited to use in cars; it can be used in any vehicle such as a truck, taxi, bus or minibus. Figure 1 The simplified schematic diagram of FIG. 1 shows a wired connection 300 , but the connection between the system parts 100 and 200 can also be a wireless connection.

[0087] The communication ports 536 and 518 are described as Universal Serial Bus (USB) ports, but any suitable connection method may be used, such as HDMI, RS485, Ethernet, etc. The connection may also be fixed and cannot be removed.

[0088] It is important to understand that Figures 3a to 3c and Figures 4a to 4b The illustrated arrangement is only one implementation of a safety device. For example, the first device is not limited to a pendant shape or a rounded mounting end. Other solutions are possible to provide a flexible mounting system to allow for a range of adjustment for camera 102, such as a rotatable lens in a fixed mount. Those skilled in the art will appreciate that many other systems may be employed.

[0089] 3M TM The adhesive pad 107 can be any means for fixing the first device 100 on a supporting structure (eg, a windshield), such as a suction cup, a rubber pad, etc.

[0090] Although one or more embodiments are described using 4K film resolution, other suitable resolutions may be used.

[0091] Those skilled in the art will appreciate that the wired connection 110 / 412 is only one example of connecting two devices to transmit data and video. Of course, other examples are possible, including wireless connections such as Bluetooth, Wi-Fi, 4G, and radio frequency (RF).

[0092] The security system 10 discloses the use of radar technology for object detection. Other forms of object detection and ranging technology may be used, such as LIDAR, infrared, or time-of-flight sensors.

[0093] First radar transmitter 602 and second radar transmitter 604 are depicted as being mounted at an angle of 60 degrees relative to direction 104 toward the exterior area in front of the vehicle. However, it should be understood that this angle is intended to achieve optimal overlap between the two radar transmitters, and other angles may be used to provide less-optimal overlap if desired. Furthermore, the angle depends on the motion detection and ranging module selected, and other angles may be selected to achieve optimal forward overlap.

[0094] Figure 10 The first device 100 is shown in relation to the windshield 1002 and the relative positions of the transmitter and receiver. However, it should be understood that the same applies to the second device 200, as it is also desirable to reduce back reflections of the transmitted signal detected by the receiver.

[0095] First radar transmitter 602 of first radar unit 532 and second radar transmitter 604 of second radar unit 534 are not limited to any specific transmitter. For example, they may be a printed circuit board (PCB) radar transmitter, a patch or microchip antenna, or a flexible printed circuit board radar antenna.

[0096] Figure 10 In the specific description, the radar signal is transmitted through the windshield or windshield of the vehicle on which the first device 100 may be installed. However, the device may also be installed behind other protective surfaces, such as a lamp or headlight housing.

[0097] Those skilled in the art will appreciate that the drawings are merely illustrative and that commercial devices may require additional equipment. The locations of these auxiliary equipment are not part of the present invention and are consistent with conventional practices in the prior art.

[0098] As described in the above embodiments, the present invention can be implemented, at least in part, using a software-controlled programmable processing device, such as a general-purpose or special-purpose processor, a digital signal processor, a microprocessor, or other processing device, data processing apparatus, or computer system. It is contemplated that a computer program for configuring a programmable device, apparatus, or system to implement the methods and apparatus can be an aspect of the present invention. The computer program can be in any suitable type of coding format, such as source code, object code, compiled code, interpreted code, executable code, static code, dynamic code, etc. The instructions can be implemented using any suitable high-level, low-level, object-oriented, visual, compiled, and / or interpreted programming language, such as Liberate, OCAP, MHP, Flash, HTML and its related languages, JavaScript, PHP, C, C++, Python, Node.js, Java, BASIC, Perl, Matlab, Pascal, Visual BASIC, ActiveX, assembly language, machine code, etc. Those skilled in the art will understand that the term "computer" in its broadest sense encompasses the programmable devices, data processing apparatus, and computer systems described above.

[0099] Where appropriate, the computer program is stored on a carrier medium in a machine-readable form, for example, the carrier medium may include memory, removable or non-removable media, erasable or non-erasable media, writable or rewritable media, digital or analog media, hard disk, floppy disk, Compact Disk Read Only Memory (CD-ROM), Company Disk Recordable (CD-R), Compact Disk Rewriteable (CD-RW), optical disk, magnetic media, magneto-optical media, removable memory cards or discs, various types of Digital Versatile Disks (DVDs), subscriber identification modules, cassettes, magnetic tapes, solid-state memory, etc.

[0100] In this specification, any reference to "one embodiment" or "an embodiment" means that a particular component, feature, structure, or characteristic associated with the embodiment is included in at least one embodiment. The term "one embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment. In addition, features of different embodiments can be combined to create other embodiments not specifically described in this specification, and any one or more features can be combined if technical and operational compatibility is achieved. If the combination of features of different embodiments is not consistent with technical and / or operational compatibility, a compatible embodiment feature combination is selected. All such embodiments are included within the scope of this specification.

[0101] In this specification, the words "comprise", "include", "contain", "have" or any variation thereof are intended to cover non-exclusive inclusion. For example, a process, method, article or apparatus that includes particular components is not necessarily limited to including only those components but may also include other components not expressly listed or inherent to the process, method, article or apparatus. In addition, unless specifically indicated to the contrary, "or" means an inclusive or, not an exclusive or. For example, condition A or B may be satisfied by any of the following: A is true (or exists) and B is false (or does not exist), A is false (or does not exist) and B is true (or exists), or both A and B are true (or exist).

[0102] In addition, the use of "a" or "an" to describe components and elements of the present invention is only for convenience to provide a general description of the present invention. The description should be read to include one or at least one, and the singular also includes the plural unless it is obvious that it is otherwise specified.

[0103] In view of the foregoing description it will be evident to one skilled in the art that various modifications may be made without departing from the scope of the invention.

Claims

1. A vehicle-mounted safety device, which can be installed on the rear surface of a rearview mirror of a vehicle, comprising: a first image capture device configured to receive a plurality of images in a first direction relative to the security device; a second image capturing device oriented in a second direction, the second direction being different from the first direction; as well as a first object detection module configured to detect the presence of an object external to a vehicle in which the safety device is installed; wherein the first image capture device and the second image capture device are configured to begin capturing a plurality of images and / or videos in response to the first object detection module detecting the presence of an object external to a vehicle in which the safety device is installed; and The second image capture device is configured to include a field of view extending beyond the rearview mirror into the cabin of the vehicle.

2. The vehicle-mounted safety device of claim 1, further comprising a second object detection module to detect the presence of an object outside the vehicle in which the safety device is installed. 3 . The vehicle-mounted safety device of claim 2 , wherein the first object detection module and the second object detection module are configured to have a field of view that overlaps with a field of view of the first image capture device.

4. The in-vehicle safety device of claim 2 or 3, wherein the first object detection module is oriented at a first angle relative to the direction of the field of view of the first imaging module, and the second object detection module is oriented at a second angle relative to the direction of the field of view of the first imaging module, the second angle being different from the first angle. 5 . The vehicle safety device as claimed in claim 4 , wherein the first angle and the second angle are equal and opposite.

6. The vehicle safety device according to claims 2 to 5, wherein the first object detection module and the second object detection module each comprise: at least one signal transmitter for transmitting a signal for object ranging; and At least two signal receivers, used for each of the at least one signal transmitter, for receiving reflections of the transmitted signal for object ranging; wherein the at least one signal transmitter and the at least two signal receivers used for each of the at least one signal transmitter are arranged relative to each other to reduce reflections of the signal for object ranging transmitted from a surface of a protective component, the protective component is located near the at least one signal transmitter and the transmitted signal passes through the surface.

7. The in-vehicle safety device of claim 5 or claim 6, further comprising a housing, and wherein the signal transmitter is arranged to minimize obstruction of the signal by features of the housing. 8 . The vehicle-mounted safety device of claim 7 , wherein the signal transmitter is arranged at a distance from the inner surface of the housing to minimize destructive interference of the housing on the signal.

9. The vehicle-mounted safety device according to claim 8, wherein the distance is 0.6 mm.

10. The in-vehicle safety device according to any one of the preceding claims, wherein the safety device is configured to be connected to a second device so that image data and motion data captured on the second device can be transmitted to the first device.

11. The vehicle safety device according to any one of the preceding claims, wherein the motion detection module is a radar module.

12. An on-vehicle safety device as claimed in any preceding claim, further comprising an inertial measurement unit.

13. The in-vehicle safety device of claim 12, wherein the safety system is configured to operate in a high power state or a low power state in response to an indication of a safety threat by the inertial measurement unit.

14. The vehicle-mounted safety device according to claim 13, further comprising a memory device and / or a data transfer unit; And wherein the apparatus stores measurement data from the first image capture device, the second image capture device, and the object detection module on a memory card, and transmits the data to an external device in response to the indication of the security threat.

15. The in-vehicle safety device according to any one of the preceding claims, wherein the second image capture device of the first device is a wide-angle lens.

16. The vehicle-mounted safety device according to any one of the preceding claims, configured to be rotatably mounted to the rear surface of the rearview mirror of the vehicle.

17. A mount attachable to a rear surface of a vehicle rearview mirror, the mount being configured to provide a rotatable coupling of an on-vehicle safety device as claimed in any preceding claim to the mount.

18. An assembly comprising a mounting base as claimed in claim 17 and a vehicle safety device as claimed in any one of the preceding claims rotatably mounted to the mounting base.

19. A vehicle comprising a safety device as claimed in any preceding claim.

20. A vehicle comprising the assembly of claim 18.

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