Hand clamping detection method and device based on vehicle-mounted ceiling screen load model and storage medium

Abstract

The invention discloses a hand clamping detection method and device based on a vehicle-mounted ceiling screen load model and a storage medium, and the method specifically comprises the following steps: observing a damping friction force and a viscosity coefficient in real time based on the ceiling screen load model, and updating and storing an observed value in real time; on the basis of a ceiling screen load model and the friction force and the viscosity coefficient calibrated in the previous step, the disturbance torque is observed in real time, an observed value is updated in real time, the real-time disturbance torque is synchronously obtained, the real-time disturbance torque is compared with a hand clamping protection threshold value, and hand clamping protection or closing operation is conducted; according to the detection method, a factory calibration process is not needed, so that the stability of hand clamping judgment is ensured, and the risks of hand clamping and mistaken touch are reduced; an external sensor does not need to be additionally arranged, so that the cost is reduced, and the universality of use scenes is improved; in addition, damping is calibrated in real time, and hand clamping logic judgment is more accurate and safer under the conditions of factory damping inconsistency, damping force attenuation, external environment temperature change and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of hand pinching detection, and in particular to a hand pinching detection method, device and storage medium based on a vehicle-mounted ceiling screen load model. Background Art

[0002] As an important medium for human-computer interaction in the automotive field, the in-vehicle display screen is an important embodiment of the intelligence of the automotive industry. At the same time, in-vehicle displays such as digital instrument displays, central control screens and rear screens are becoming more and more popular with users. In order to realize the in-vehicle TV and provide a better user experience, the in-vehicle ceiling screen came into being. The large-sized ceiling screen is located on the top of the car and is controlled to a specified angle through voice or buttons to play videos and perform other intelligent operations. However, when the ceiling screen is reset to zero, there is a risk of pinching the hand, which causes a certain degree of damage to the user.

[0003] At present, the mainstream finger clamping judgment is carried out in the screen-off process and under the working condition of the angle less than 30°. The specific scheme is as follows: Method 1: Perform finger clamping detection on the display screen according to the finger clamping current and speed. The finger clamping current is obtained according to calibration; Method 2: External sensor (TP touch, acceleration sensor);

[0004] Disadvantages of Method 1: Due to the characteristics of the motion mechanism of the ceiling screen, the load torque is different under the influence of the screen gravity at different angles, the damping retention force of the active mechanism damping material is reduced due to aging, the damping material retention force is biased, the retention force of the damping material changes when the ambient temperature changes, the damping friction force at different speeds, and the calibration method and the actual vehicle environment are different; after the factory clamping current is calibrated, it is impossible to calibrate in real time. The above factors lead to unstable clamping judgment, and there is a certain risk of clamping and false triggering. Disadvantages of Method 2: Increased cost, some scenes cannot be triggered (TP cannot respond). Summary of the invention

[0005] The main purpose of the present invention is to provide a hand-pinch detection method, device and storage medium based on a vehicle-mounted ceiling screen load model, aiming to solve existing technical problems.

[0006] To achieve the above object, the present invention provides a hand-pinching detection method based on a vehicle-mounted ceiling screen load model, which specifically includes the following steps:

[0007] Based on the ceiling screen load model, the damping friction and viscosity coefficient are observed in real time, and the observed values ​​are updated and saved in real time;

[0008] Based on the ceiling screen load model and the friction and viscosity coefficients calibrated in the above steps, the interference torque is observed in real time, and the observed values ​​are updated and synchronized in real time;

[0009] Obtain the real-time interference torque and compare it with the finger pinch protection threshold to perform finger pinch protection or shutdown operations.

[0010] Furthermore, when the movement angle range of the ceiling screen is in the range of 90°±10°, the damping friction force and the viscosity coefficient are observed.

[0011] Furthermore, the observed values ​​of the damping friction force and the viscosity coefficient need to satisfy an angle interval and maintain a stable condition. If not, the observation is performed again.

[0012] Furthermore, the damping friction force and viscosity coefficient observation values ​​that meet the requirements are updated with the last calibration values ​​and written into the MCU data area.

[0013] Furthermore, the damping friction force and viscosity coefficient are stored in the data area within the MCU chip, and the theoretical values ​​are written at the time of shipment, and are updated in real time at the beginning of the subsequent re-detection step.

[0014] Furthermore, the interference torque observation is performed when the ceiling screen is in the closed position and the angle is less than 80°.

[0015] Furthermore, the finger pinch protection judgment is performed when the ceiling screen is in the screen closing process and the angle is less than 30°.

[0016] An electronic device comprises: a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the computer is configured to implement the steps of the above-mentioned hand pinching detection method based on the vehicle-mounted ceiling screen load model.

[0017] A storage medium stores a computer program, which, when executed by a processor, implements the steps of the above-mentioned hand-pinching detection method based on a vehicle-mounted ceiling screen load model.

[0018] The beneficial effects of the present invention are embodied in:

[0019] The detection method of the present invention does not require a factory calibration process, which ensures the stability of the finger pinching judgment and reduces the risks of finger pinching and accidental touch; and does not require the installation of external sensors, which reduces costs and increases the breadth of usage scenarios; in addition, the damping is calibrated in real time, and the finger pinching logic judgment is more accurate and safer under conditions such as inconsistent factory damping, damping force attenuation, and changes in external ambient temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a flow chart of a hand-pinching detection method based on a vehicle-mounted ceiling screen load model of the present invention;

[0021] Figure 2 This is a flow chart of step 1 of the hand-pinching detection method based on the vehicle-mounted ceiling screen load model of the present invention;

[0022] Figure 3This is a flow chart of step 2 of the hand-pinching detection method based on the vehicle-mounted ceiling screen load model of the present invention;

[0023] Figure 4 This is a flow chart of step three of the hand pinching detection method based on the vehicle-mounted ceiling screen load model of the present invention. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] Kinematic equation of vehicle ceiling screen:

[0026] Where: T e is the motor output torque, Rate is the speed ratio of the reducer, η is the efficiency of the reducer, T l is the damping starting friction force, J is the LCM inertia, ω m is the LCM rotation angular velocity, B is the damping viscous friction coefficient, G is the LCM weight, H is the LCM height, θ is the LCM rotation angle, T dis External interference forces include interference forces caused by pinching and collision.

[0027] T l The damping starting friction force and B damping viscous friction coefficient are limited by the large factory deviation of the damping material characteristics and the temperature characteristics are relatively sensitive, so real-time calibration is required according to actual working conditions.

[0028] T dis It is the external interference quantity, which feeds back the external interference force. It can be used for hand clamping logic judgment combined with the current rotating screen angle.

[0029] See also Figure 1 The present invention provides a hand-pinching detection method based on a vehicle-mounted ceiling screen load model, which specifically includes the following steps:

[0030] S1. Based on the ceiling screen load model, the damping friction and viscosity coefficient are observed in real time, and the observed values ​​are updated and saved in real time;

[0031] See also Figure 1 and Figure 2 When the ceiling screen movement angle range is in the range of 90°±10°, the damping friction force and the viscosity coefficient are observed.

[0032] The observed values ​​of the damping friction force and the viscosity coefficient need to meet the angle range and maintain stability conditions. If not, re-observation is performed.

[0033] The damping friction force and viscosity coefficient observation values ​​that meet the requirements are updated with the last calibration values ​​and written into the MCU data area.

[0034] Specifically, the damping friction and viscosity coefficient are observed during the screen-off process, and the LCM angle is greater than 80° and less than 100°. In the above movement angle range, when the LCM is in the ±10° range of 90°, the LCM weight has little effect on the motor load, and the observed values ​​are easier to converge.

[0035] S2. Based on the ceiling screen load model and the friction and viscosity coefficient calibrated in the above steps, the interference torque is observed in real time, and the observed value is updated and synchronized in real time;

[0036] See also Figure 1 and Figure 3 The damping friction and viscosity coefficient are stored in the data area of ​​the MCU chip, and the theoretical values ​​are written at the factory, and updated in real time at the beginning of the subsequent re-detection step.

[0037] The interference torque observation is performed when the ceiling screen is in the closed position and the angle is less than 80°.

[0038] Before step S2, the latest damping friction and viscosity coefficient need to be read from the data area of ​​the MCU.

[0039] The disturbance force observation values ​​are updated in real time.

[0040] S3. Obtain the real-time interference torque and compare it with the finger pinch protection threshold to perform finger pinch protection or shutdown operation.

[0041] See also Figure 1 and Figure 4 The finger pinch protection judgment is performed when the ceiling screen is in the screen closing process and the angle is less than 30°.

[0042] It is necessary to obtain the real-time disturbance torque from step S2;

[0043] The finger pinch protection is triggered when the interference torque is greater than the finger pinch protection threshold;

[0044] The interference torque is less than the finger pinch protection threshold, and the screen is turned off, and the process ends.

[0045] In addition, an embodiment of the present invention also proposes an electronic device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer is configured to implement the steps of the hand pinching detection method based on the vehicle-mounted ceiling screen load model as described above.

[0046] In addition, an embodiment of the present invention further proposes a storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the hand pinching detection method based on the vehicle-mounted ceiling screen load model as described above are implemented.

[0047] It should be understood that the above is only an example and does not constitute any limitation on the technical solution of the present invention. In specific applications, technicians in this field can make settings as needed, and the present invention does not limit this.

[0048] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present invention. In practical applications, technicians in this field can select part or all of them according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0049] In addition, for technical details that are not described in detail in this embodiment, reference can be made to the hand pinching detection method based on the vehicle-mounted ceiling screen load model provided in any embodiment of the present invention, and they will not be described again here.

[0050] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present invention. In practical applications, technicians in this field can select part or all of them according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0051] In addition, for technical details that are not described in detail in this embodiment, reference can be made to the hand pinching detection method based on the vehicle-mounted ceiling screen load model provided in any embodiment of the present invention, and they will not be described again here.

[0052] In addition, it should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0053] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0054] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory (ROM) / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0055] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A hand-claw detection method based on a vehicle-mounted ceiling screen load model, characterized in that: The specific steps include: Based on the ceiling screen load model, the damping friction and viscosity coefficient are observed in real time, and the observed values ​​are updated and saved in real time; Based on the ceiling screen load model and the friction and viscosity coefficients calibrated in the above steps, the interference torque is observed in real time, and the observed values ​​are updated and synchronized in real time; Obtain the real-time interference torque and compare it with the finger pinch protection threshold to perform finger pinch protection or shutdown operations.

2. The hand-pinching detection method based on the vehicle-mounted ceiling screen load model according to claim 1 is characterized in that: When the ceiling screen movement angle range is within the range of 90°±10°, the damping friction force and the viscosity coefficient are observed.

3. The hand-pinching detection method based on the vehicle-mounted ceiling screen load model according to claim 1 is characterized in that: The observed values ​​of the damping friction force and the viscosity coefficient need to meet the angle range and maintain stability conditions. If not, re-observation is performed.

4. The hand-pinching detection method based on the vehicle-mounted ceiling screen load model according to claim 1 is characterized in that: The damping friction force and viscosity coefficient observation values ​​that meet the requirements are updated with the last calibration values ​​and written into the MCU data area.

5. The hand-pinching detection method based on the vehicle-mounted ceiling screen load model according to claim 1 is characterized in that: The damping friction force and viscosity coefficient are stored in the data area of ​​the MCU chip, and the theoretical values ​​are written at the factory, and are updated in real time at the beginning of the subsequent re-detection step.

6. The hand-pinching detection method based on the vehicle-mounted ceiling screen load model according to claim 1 is characterized in that: The interference torque observation is performed when the ceiling screen is in the closed position and the angle is less than 80°.

7. The hand-pinching detection method based on the vehicle-mounted ceiling screen load model according to claim 1 is characterized in that: The finger pinch protection judgment is performed when the ceiling screen is in the screen closing process and the angle is less than 30°.

8. An electronic device, characterized in that: The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, and the computer is configured to implement the steps of the hand pinching detection method based on the vehicle-mounted ceiling screen load model as described in any one of claims 1 to 7.

9. A storage medium, characterized in that: The storage medium stores a computer program, which, when executed by a processor, implements the steps of the hand pinching detection method based on the vehicle-mounted ceiling screen load model as described in any one of claims 1 to 7.

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