Driving safety monitoring device
By adjusting the height and angle of the camera and combining image alignment and optical flow technology, the problem of incomplete facial expression capture caused by differences in driver height and habits is solved, thereby improving the accuracy and response speed of driving safety monitoring.
Patent Information
- Application Number
- CN202422753451.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-11-12
AI Technical Summary
Differences in drivers' height and driving habits make it difficult for cameras to fully capture facial expressions, affecting the accuracy of driving safety monitoring devices.
A driving safety monitoring device including a camera, a processor and an adjustment mechanism is used. The height and angle of the camera are adjusted by a driving component and a locking component to ensure that the driver's facial expressions are fully recorded. The image alignment method based on the position of the nose tip and dense optical flow technology are combined to capture subtle facial movements.
The camera can be flexibly adjusted to suit different heights and driving habits, ensuring complete capture of facial expressions and improving the accuracy and response speed of driving safety monitoring.
Smart Images
Figure CN223355496U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of driving safety monitoring, in particular to a driving safety monitoring device. Background Art
[0002] Drivers are prone to fatigue after prolonged driving. Fatigue slows the driver's reaction to unexpected road conditions, prolongs their reaction time, and makes them prone to overreactions and incorrect responses. In severe cases, the driver may experience a brief sleep state and lose control of the vehicle. Fatigue driving increases the probability of traffic accidents.
[0003] Current driving safety monitoring devices include cameras and processors. The camera records the driver's micro-expressions in real time, and the processor analyzes the micro-expressions. The processor determines whether the driver is driving fatigued based on changes in the driver's micro-expressions and responds to avoid safety accidents.
[0004] Due to different heights and driving habits of drivers, the height and angle of the driver's face in the cockpit may deviate, which may easily cause the camera to be unable to fully capture the driver's facial expression. Utility Model Content
[0005] The purpose of the utility model is to provide a driving safety monitoring device, which aims to solve the problem that due to the different heights and driving habits of drivers, the height and angle of the driver's face in the cockpit are different, which easily leads to the camera being unable to fully capture the driver's facial expression.
[0006] To achieve the above-mentioned purpose, the utility model provides a driving safety monitoring device, including a camera, a processor and an adjustment mechanism, the adjustment mechanism including an installation box, a drive assembly, a threaded barrel, a mounting clamp, a rotating roller, a mounting block and a locking assembly, the processor is fixedly connected to the installation box, the drive assembly is arranged on the installation box, the threaded barrel is arranged on the output end of the drive assembly, the mounting clamp is fixedly connected to the threaded barrel and is located below the threaded barrel, the rotating roller is rotatably connected to the installation clamp, the rotating roller is fixedly connected to the installation block, and the installation block is located in the installation clamp, the locking assembly is arranged on the rotating roller and the installation clamp, and the camera is fixedly connected to the installation block.
[0007] In which, the driving assembly includes a power kit, a driven bevel gear and a screw rod, the mounting box has a mounting groove, the power kit is arranged on the mounting box, the driven bevel gear is arranged on the output end of the power kit and is located in the mounting groove, the screw rod is fixedly connected to the driven bevel gear and extends to the bottom of the mounting box, the screw rod is threadedly connected to the threaded barrel and is located in the threaded barrel.
[0008] The power kit includes a rotating rod and a driving bevel gear. The rotating rod is rotatably connected to the mounting box and extends into the mounting slot. The driving bevel gear is fixedly connected to the rotating rod, and the driving bevel gear is meshed with the driven bevel gear.
[0009] Among them, the driving assembly also includes two clamping strips, the threaded barrel has two clamping slots, the two clamping strips are fixedly connected to the mounting box and are located at both ends of the screw rod, and the two clamping strips are slidingly connected to the threaded barrel and are respectively located in the two clamping slots.
[0010] Among them, the locking assembly includes a limit plate, a mounting bracket and a pull rod, the limit plate has a plurality of limit holes, the limit plate is fixedly connected to one end of the rotating roller, the mounting bracket is fixedly connected to the mounting clamp and is located above the limit plate, and the pull rod is slidably connected to the mounting bracket and extends into the limit hole.
[0011] Among them, the locking assembly also includes a mounting plate and a telescopic spring. The mounting plate is fixedly connected to one end of the pull rod away from the limit plate. The two ends of the telescopic spring are respectively fixedly connected to the mounting frame and the mounting plate, and the pull rod is located inside the telescopic spring.
[0012] The utility model provides a driving safety monitoring device. When the device is used to monitor the driver's facial expression, the driving component is controlled, and the driving component drives the threaded cylinder and the camera to move up and down, thereby controlling the height of the camera. The mounting block is then rotated, and the angle of the mounting block changes. The angle of the camera is fixed by the locking component, thereby adjusting the angle of the camera. By adjusting the angle and height of the camera in the above manner, it is ensured that the camera can completely record the driver's facial expression. The camera transmits the changes in the driver's facial expression to the processor, and the processor responds accordingly according to the changes in the driver's facial expression. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.
[0014] Figure 1 It is a structural diagram of the vehicle driving safety monitoring device of the present utility model.
[0015] Figure 2 It is a side view of the driving safety monitoring device of the present utility model.
[0016] Figure 3 This utility model Figure 2 AA line section view.
[0017] Figure 4 This utility model Figure 3 A magnified view of the local structure at point B.
[0018] 101-installation box, 102-processor, 103-rotating rod, 104-driving bevel gear, 105-driven bevel gear, 106-screw, 107-threaded cylinder, 108-card strip, 109-card slot, 110-installation clamp, 111-rotating roller, 112-installation block, 113-limiting plate, 114-camera, 115-mounting frame, 116-pull rod, 117-installation plate, 118-telescopic spring, 119-limiting hole. DETAILED DESCRIPTION
[0019] See also Figures 1 to 4 ,in, Figure 1 This is a structural diagram of the vehicle safety monitoring device of the utility model. Figure 2 This is a side view of the vehicle safety monitoring device of the present utility model. Figure 3 This utility model Figure 2 AA line section view, Figure 4 This utility model Figure 3 A magnified view of the local structure at point B.
[0020] The utility model provides a driving safety monitoring device, including a camera 114, a processor 102 and an adjustment mechanism, the adjustment mechanism including an installation box 101, a drive assembly, a threaded barrel 107, a mounting clamp 110, a rotating roller 111, a mounting block 112 and a locking assembly, the drive assembly including a power kit, a driven bevel gear 105, a screw 106 and two clamping strips 108, the installation box 101 has a mounting groove, the threaded barrel 107 has two clamping slots 109, the power kit includes a rotating rod 103 and an active bevel gear 104, the locking assembly includes a limit plate 113, a mounting frame 115 and a pull rod 116, the limit plate 113 has a plurality of limit holes 119, the locking assembly also includes a mounting plate 117 and a telescopic spring 118, the above-mentioned solution solves the problem of different heights and driving habits of drivers, the height and angle of the driver's face in the cockpit deviate, which easily leads to the camera 114 being unable to fully capture the driver's facial expression.
[0021] In this embodiment, the processor 102 is fixedly connected to the installation box 101, the drive assembly is arranged on the installation box 101, the threaded barrel 107 is arranged on the output end of the drive assembly, the mounting clamp 110 is fixedly connected to the threaded barrel 107 and is located below the threaded barrel 107, the rotating roller 111 is rotatably connected to the mounting clamp 110, the rotating roller 111 is fixedly connected to the mounting block 112, and the mounting block 112 is located in the mounting clamp 110, the locking assembly is arranged on the rotating roller 111 and the mounting clamp 110, the camera 114 is fixedly connected to the mounting block 112, and the device is used to monitor the driver's facial expression. During monitoring, the drive assembly is controlled to move the threaded barrel 107 and the camera 114 up and down, thereby controlling the height of the camera 114. The mounting block 112 is then rotated, changing its angle. The locking assembly secures the angle of the camera 114, thereby adjusting the angle of the camera 114. Adjusting the angle and height of the camera 114 in this manner ensures that the camera 114 can fully record the driver's facial expressions. The camera 114 transmits changes in the driver's facial expressions to the processor 102, which then responds accordingly. The camera 114 uses an image alignment method based on the tip of the nose to eliminate global displacement caused by head shaking. Secondly, based on the action unit definition in the Facial Coding System (FACS), the device selects fourteen regions of interest (ROIs) to capture subtle facial movements. Dense optical flow is introduced to estimate the local motion and temporal variation of the ROIs. Thirdly, the device employs a peak detection method to accurately locate motion intervals within the temporal variation curve. This method uses the optical flow method to estimate facial motion because the optical flow method performs well in capturing subtle dynamic information of the face and has good interpretability. In order to eliminate the interference of head shaking on the optical flow feature, the device uses an image alignment method based on the position of the nose tip, which effectively improves the accuracy of the optical flow feature. On this basis, the device selects fourteen regions of interest (ROIs) on the face according to the definition of action units (AUs) in the facial coding system (FACS)
[23] . The device implements the optical flow method to extract the features of the fourteen ROIs and establish a time domain change curve. The peak detection method can accurately locate the local motion interval on the time domain change curve. Finally, the local motion of different ROIs is selectively fused to accurately calculate the micro-expression interval. In actual work, the input is a long video and the output is the time period of all recognized macro and micro expressions. A fixed sliding window covering N frames of images is used to divide the video, and then macro expressions and micro expressions are recognized in the sliding window.In micro-expression detection, detected local motion intervals are merged to obtain a complete micro-expression interval. Micro-expressions often consist of multiple local facial movements. Therefore, these local movements are first detected and then fused together to form a complete micro-expression interval. In this context, "intervals" may refer to a series of consecutive image frames along a timeline that display changes in facial movement. "Fusion" refers to the integration of these local motion intervals into a more comprehensive expression that more accurately represents the onset and end of the entire micro-expression. This process helps comprehensively consider multiple local movements, improves the accuracy of micro-expression detection, and ensures that complete and consistent micro-expressions are captured. The process of recognizing expressions in image sequences in a sliding window consists of four steps: facial alignment, local optical flow feature extraction, local motion detection, and local motion interval fusion. The set of expression intervals T = {[start1, end1], [start2, end2], ..., [startlast, endlast]} is then obtained. The step size (S) of the sliding window is adaptively adjusted based on the position of the detected expression. If no micro-expression is detected in the current window, S=N / 2(1), and if a micro-expression is detected, S=endlast+1(2).
[0022] Furthermore, the power kit is arranged on the installation box 101, the driven bevel gear 105 is arranged on the output end of the power kit and is located in the installation groove, the screw rod 106 is fixedly connected to the driven bevel gear 105 and extends to the bottom of the installation box 101, and the screw rod 106 is threadedly connected to the threaded barrel 107 and is located in the threaded barrel 107.
[0023] Furthermore, the rotating rod 103 is rotatably connected to the installation box 101 and extends into the installation slot. The driving bevel gear 104 is fixedly connected to the rotating rod 103 , and the driving bevel gear 104 is meshedly connected to the driven bevel gear 105 .
[0024] Furthermore, the two clamping strips 108 are fixedly connected to the installation box 101 and are located at both ends of the screw rod 106 . The two clamping strips 108 are slidably connected to the threaded barrel 107 and are respectively located in the two clamping grooves 109 .
[0025] In this embodiment, when adjusting the height of the camera 114, the operator rotates the rotating rod 103, and the rotating rod 103 drives the active bevel gear 104 to rotate, and the active bevel gear 104 drives the driven bevel gear 105 and the screw rod 106 to rotate. The screw rod 106 rotates, driving the threaded barrel 107 and the camera 114 to move up and down, and the two clamping strips 108 slide in the two clamping slots 109 respectively, playing a role of limiting and guiding the movement of the threaded barrel 107, ensuring that the threaded barrel 107 remains stable during the movement.
[0026] Furthermore, the limiting plate 113 is fixedly connected to one end of the rotating roller 111 , the mounting frame 115 is fixedly connected to the mounting clamp 110 and is located above the limiting plate 113 , and the pull rod 116 is slidably connected to the mounting frame 115 and extends into the limiting hole 119 .
[0027] Furthermore, the mounting plate 117 is fixedly connected to one end of the pull rod 116 away from the limit plate 113 , the two ends of the telescopic spring 118 are fixedly connected to the mounting frame 115 and the mounting plate 117 respectively, and the pull rod 116 is located inside the telescopic spring 118 .
[0028] In this embodiment, when adjusting the angle of the camera 114, the pull rod 116 is pulled outward, the pull rod 116 leaves the limiting hole 119, the limiting plate 113 and the rotating roller 111 are released from the restriction, and the operator rotates the camera 114 and the mounting block 112, and the angle of the camera 114 changes. After adjusting the camera 114 to an appropriate angle, the pull rod 116 is released, and the telescopic spring 118 contracts under the action of its own elastic potential energy, and drives the pull rod 116 to be inserted into the corresponding limiting hole 119, thereby fixing the angle of the camera 114.
[0029] When the device of the present invention is used to monitor the driver's facial expression, the installation box 101 is fixed to the roof of the vehicle, and the installation box 101 is located in front of the driver. The operator rotates the rotating rod 103, and the rotating rod 103 drives the active bevel gear 104 to rotate. The active bevel gear 104 drives the driven bevel gear 105 and the screw rod 106 to rotate. The screw rod 106 rotates, driving the threaded cylinder 107 and the camera 114 to move up and down, thereby controlling the height of the camera 114. The pull rod 116 is pulled outward, and the pull rod 116 leaves the limiting hole 119. The limiting plate 113 and the rotating roller 111 are released from the restriction, and the operator rotates the camera 1 14 and the mounting block 112, the angle of the camera 114 changes. After adjusting the camera 114 to an appropriate angle, release the pull rod 116, and the telescopic spring 118 contracts under the action of its own elastic potential energy, and drives the pull rod 116 to be inserted into the corresponding limiting hole 119, thereby fixing the angle of the camera 114, thereby adjusting the angle of the camera 114. By adjusting the angle and height of the camera 114 in the above manner, it is ensured that the camera 114 can fully record the driver's facial expression. The camera 114 transmits the changes in the driver's facial expression to the processor 102, and the processor 102 will respond accordingly according to the changes in the driver's facial expression.
[0030] The above disclosure is only a preferred embodiment of the present application and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present application are still within the scope covered by the present application.
Claims
1. A driving safety monitoring device, characterized in that: It includes a camera, a processor and an adjustment mechanism, the adjustment mechanism includes a mounting box, a drive assembly, a threaded barrel, a mounting clamp, a rotating roller, a mounting block and a locking assembly, the processor is fixedly connected to the mounting box, the drive assembly is arranged on the mounting box, the threaded barrel is arranged on the output end of the drive assembly, the mounting clamp is fixedly connected to the threaded barrel and is located below the threaded barrel, the rotating roller is rotatably connected to the mounting clamp, the rotating roller is fixedly connected to the mounting block, and the mounting block is located in the mounting clamp, the locking assembly is arranged on the rotating roller and the mounting clamp, and the camera is fixedly connected to the mounting block.
2. The driving safety monitoring device according to claim 1, characterized in that: The driving assembly includes a power kit, a driven bevel gear and a screw rod. The mounting box has a mounting groove. The power kit is arranged on the mounting box. The driven bevel gear is arranged on the output end of the power kit and is located in the mounting groove. The screw rod is fixedly connected to the driven bevel gear and extends to the bottom of the mounting box. The screw rod is threadedly connected to the threaded barrel and is located in the threaded barrel.
3. The driving safety monitoring device according to claim 2, characterized in that: The power kit includes a rotating rod and a driving bevel gear. The rotating rod is rotatably connected to the installation box and extends into the installation slot. The driving bevel gear is fixedly connected to the rotating rod, and the driving bevel gear is meshed with the driven bevel gear.
4. The driving safety monitoring device according to claim 3, characterized in that: The drive assembly also includes two clamping strips, the threaded barrel has two clamping slots, the two clamping strips are fixedly connected to the mounting box and are located at both ends of the screw rod, and the two clamping strips are slidably connected to the threaded barrel and are respectively located in the two clamping slots.
5. The driving safety monitoring device according to claim 4, characterized in that: The locking assembly includes a limit plate, a mounting bracket and a pull rod. The limit plate has a plurality of limit holes. The limit plate is fixedly connected to one end of the rotating roller. The mounting bracket is fixedly connected to the mounting clamp and is located above the limit plate. The pull rod is slidably connected to the mounting bracket and extends into the limit hole.
6. The driving safety monitoring device according to claim 5, characterized in that: The locking assembly also includes a mounting plate and a telescopic spring. The mounting plate is fixedly connected to one end of the pull rod away from the limit plate. Both ends of the telescopic spring are respectively fixedly connected to the mounting frame and the mounting plate, and the pull rod is located inside the telescopic spring.