CN110316131B - Vehicle collision protection method and device - Google Patents
Vehicle collision protection method and device Download PDFInfo
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- CN110316131B CN110316131B CN201810278114.0A CN201810278114A CN110316131B CN 110316131 B CN110316131 B CN 110316131B CN 201810278114 A CN201810278114 A CN 201810278114A CN 110316131 B CN110316131 B CN 110316131B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
- B60R21/0132—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to vehicle motion parameters, e.g. to vehicle longitudinal or transversal deceleration or speed value
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
- B60R21/0136—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to actual contact with an obstacle, e.g. to vehicle deformation, bumper displacement or bumper velocity relative to the vehicle
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Abstract
The invention provides a vehicle collision protection method and a device, wherein the method comprises the following steps: obtaining elastic wave signals generated by collision outside a vehicle through a plurality of collision sensors arranged on a vehicle shell, and converting the elastic wave signals into voltage signals; when the energy value of the voltage signal is higher than a preset threshold value, obtaining collision data and the running parameters of the vehicle; calculating and obtaining the collision force, the collision track and the collision time of the vehicle according to the collision data; and obtaining a prestored processing scheme through the collision force, the collision track, the collision time and the operation parameters, and controlling the vehicle to execute corresponding actions according to the processing scheme.
Description
Technical Field
The invention relates to the field of vehicle safety, in particular to a vehicle collision protection method and device.
Background
In the current society, automobiles have become important vehicles for public travel, and the safety problem of the automobiles is also considered by more and more users; in the field of protection in the aspect of vehicle safety, in the prior art, the safety of a vehicle is improved by mainly increasing the thickness of an automobile steel plate, enabling the automobile to be more resistant to collision by a vehicle body structure and the like; meanwhile, part of vehicles also have preventive protection strategies similar to infrared monitoring and active stopping when the vehicle and an external vehicle are about to collide, and the like, and all the prior art are preventive safety protection, and all the protection strategies are passive protection strategies, so that the problem of uncontrollable danger also exists; moreover, the conditions that the vehicle is collided to generate danger and the like are often unpredictable, and how to ensure the safety of life and property of the driver or passengers can not quickly and accurately actively control the protective equipment in the dangerous collision process can only be followed by the life of the driver or passengers, and the automobile is expected to have over-hard self mass or lighter collision degree; the problem of real-time control of vehicle protection equipment during the risk is not considered by the public, how to reduce losses.
Based on the above problems, there is a need for a protection method that can help a vehicle to cope with a sudden collision time to protect the life and property safety of a driver and passengers.
Disclosure of Invention
The invention aims to provide a vehicle collision protection method and a vehicle collision protection device, which are used for detecting the external collision condition of a vehicle in time, accurately confirming the current state of the vehicle according to the collision conditions, helping a driver to provide a more accurate braking scheme and ensuring the life and property safety of the driver and passengers.
The present invention provides a vehicle collision protection method to achieve the above object, which comprises: obtaining elastic wave signals generated by collision outside a vehicle through a plurality of collision sensors arranged on a vehicle shell, and converting the elastic wave signals into voltage signals; when the energy value of the voltage signal is higher than a preset threshold value, obtaining collision data and the running parameters of the vehicle; calculating and obtaining the collision force, the collision track and the collision time of the vehicle according to the collision data; and obtaining a prestored processing scheme through the collision force, the collision track, the collision time and the operation parameters, and controlling the vehicle to execute corresponding actions according to the processing scheme.
In the vehicle collision prevention method, preferably, the converting the elastic wave signal into a voltage signal includes: and the collision sensor converts the elastic wave signal into a voltage signal with corresponding frequency or a voltage signal with equal proportional frequency according to the frequency of the elastic wave signal.
In the vehicle collision protection method, preferably, the obtaining of the collision strength of the vehicle by calculating according to the collision data includes: and calculating to obtain an energy value of the collision data according to the amplitude of the collision data, and obtaining the collision force of the vehicle according to the energy value of the collision data.
In the vehicle collision protection method, preferably, the calculating and obtaining the collision trajectory of the vehicle from the collision data includes: and calculating to obtain the collision track of the vehicle according to the position of the collision sensor receiving the elastic wave signals and the sequence of the collision sensor receiving the elastic wave signals.
In the vehicle collision protection method, preferably, the calculating and obtaining the collision trajectory of the vehicle from the collision data includes: calculating and obtaining a signal characteristic value of the voltage signal through the collision data; comparing the signal characteristic value with a pre-stored reference characteristic value, and obtaining a collision coordinate position according to a comparison result; and obtaining the collision track according to the collision coordinate position.
In the above vehicle collision prevention method, preferably, the method further includes: obtaining the vibration frequency or amplitude range of a vehicle engine, obtaining vehicle internal noise data according to the vibration frequency or amplitude range of the vehicle engine, and comparing the voltage signal with the internal noise data to obtain the collision data.
In the above vehicle collision prevention method, preferably, the method further includes: and comparing every two elastic wave signals received by at least three collision sensors on the same part of the vehicle, and converting the elastic wave signals into voltage signals when the difference ratio of the two elastic wave signals is greater than a preset threshold value.
The invention also provides a vehicle collision protection device, which comprises a data acquisition module, an analysis module, a calculation module and a plurality of collision sensors; the collision sensor is arranged on a vehicle shell and used for acquiring an elastic wave signal generated by collision outside the vehicle and converting the elastic wave signal into a voltage signal; the data acquisition module is used for acquiring collision data and vehicle operation parameters when the energy value of the voltage signal is higher than a preset threshold value; the analysis module is used for calculating and obtaining the collision force, the collision track and the collision time of the vehicle according to the collision data; the calculation module is used for obtaining a prestored processing scheme through the collision force, the collision track, the collision time and the operation parameters, and controlling the vehicle to execute corresponding actions according to the processing scheme.
In the vehicle collision protection apparatus, it is preferable that the collision sensor includes: and converting the elastic wave signal into a voltage signal with corresponding frequency or a voltage signal with equal proportional frequency according to the frequency of the elastic wave signal.
In the above vehicle collision protection apparatus, preferably, the analysis module includes: and calculating to obtain an energy value of the collision data according to the amplitude of the collision data, and obtaining the collision force of the vehicle according to the energy value of the collision data.
In the above vehicle collision protection apparatus, preferably, the analysis module includes: and calculating to obtain the collision track of the vehicle according to the position of the collision sensor receiving the elastic wave signals and the sequence of the collision sensor receiving the elastic wave signals.
In the above vehicle collision protection apparatus, preferably, the analysis module includes: calculating and obtaining a signal characteristic value of the voltage signal through the collision data; comparing the signal characteristic value with a pre-stored reference characteristic value, and obtaining a collision coordinate position according to a comparison result; and obtaining the collision track according to the collision coordinate position.
In the vehicle collision protection device, preferably, the device further includes a denoising module, where the denoising module is configured to obtain a vibration frequency or amplitude range of a vehicle engine, obtain vehicle internal noise data according to the vibration frequency or amplitude range of the vehicle engine, and compare the voltage signal with the internal noise data to obtain the collision data.
In the vehicle collision protection device, preferably, the device further includes a denoising module, where the denoising module is configured to compare two elastic wave signals received by at least three collision sensors on the same component of the vehicle, and convert the elastic wave signals into voltage signals when a difference ratio between the two elastic wave signals is greater than a predetermined threshold.
The vehicle collision protection method and the vehicle collision protection device can effectively detect the external collision condition of the vehicle, accurately confirm the current state of the vehicle according to the collision conditions, help a driver to provide a more accurate braking scheme and guarantee the life and property safety of the driver and passengers.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic flow chart of a vehicle collision protection method provided by the present invention;
FIG. 2 is a schematic flow chart of a method for protecting a vehicle from collision according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of a method for protecting a vehicle from collision according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a vehicle crash protection device provided in accordance with the present invention;
FIG. 5 is a schematic structural diagram of a vehicle crash protection device according to an embodiment of the present invention;
fig. 6A to 6D are schematic views illustrating installation of an impact sensor of a vehicle impact protection device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the present invention is described in further detail below with reference to the embodiments and the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
In the description herein, reference to the term "an embodiment," "a particular embodiment," "for example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. The sequence of steps involved in the embodiments is for illustrative purposes to illustrate the implementation of the present application, and the sequence of steps is not limited and can be adjusted as needed.
Referring to fig. 1, the present invention provides a vehicle collision protection method, which specifically includes: s101, obtaining an elastic wave signal generated by collision outside a vehicle through a plurality of collision sensors arranged on a vehicle shell, and converting the elastic wave signal into a voltage signal; s102, when the energy value of the voltage signal is higher than a preset threshold value, obtaining collision data and running parameters of a vehicle; s103, calculating and obtaining the collision force, the collision track and the collision time of the vehicle according to the collision data; s104, obtaining a prestored processing scheme through the collision force, the collision track, the collision time and the operation parameters, and controlling the vehicle to execute corresponding actions according to the processing scheme. In the above embodiment, the collision sensor may be disposed inside the vehicle housing or in the interlayer, and may be a piezoelectric ceramic sensor, a piezoelectric film sensor, a piezoelectric crystal sensor, or another sensor having a piezoelectric effect, and is mainly aimed at collecting elastic wave signals generated by the vehicle housing and the vehicle body due to collision, and accurately analyzing the elastic wave signals to obtain the collision behavior of the vehicle; in the process, any object can generate a specific elastic wave signal when colliding with the vehicle, so that the collision degree of the vehicle body can be effectively distinguished in the actual work in the above mode, and a driver can be helped to know the collision condition of the vehicle in time; meanwhile, the parameters of the vehicle such as collision force, collision track, collision time and the like are obtained through calculation and analysis according to the elastic wave signals and the collision sensor, the current state of the vehicle and the dangerous condition existing in the next specific period can be distinguished through combining the parameters with the vehicle running parameters, and based on the conditions, a driver can be assisted to determine a subsequent control scheme of the vehicle more accurately through a preset processing scheme when the vehicle collision occurs, so that unnecessary loss existing again after the vehicle collision is avoided.
It should be noted that the vehicle operation parameters further may include related information such as a running speed, a vehicle body weight, vehicle surrounding environment data, the number and distribution of passengers in the vehicle in a predetermined period before the vehicle collides, and when the vehicle collides, the subsequent behavior of the vehicle may be obtained through calculation of the elastic wave signal, and the risk that the passengers and objects in the vehicle may have in the subsequent behavior may be obtained through analysis according to the subsequent behavior of the vehicle and the vehicle operation parameters, and the vehicle is assisted and controlled in advance to perform corresponding control processing based on the risk, so as to reduce the loss on the personnel and property as much as possible; in actual work, of course, the worker may further add relevant data in the aspect of vehicle safety as a reference, for example, compare and analyze information such as the position of the airbag of the vehicle, the collision resistance of the vehicle body structure, the collision angle and the collision force of the vehicle body, and the like, to obtain an optimal processing scheme, and the invention is not particularly limited.
Because the elastic wave signal comes from vibration, the quality of the vehicle also ensures that part of slight collisions can not influence the elastic wave signal, so that in the actual work, the subsequent collision analysis processing is not needed if the elastic wave signal and other slight collisions generated on the vehicle by rainfall, and aiming at the problem, the invention carries out filtering in the step S102, and carries out data interception of the slight collisions mainly by setting a threshold value, thereby avoiding unnecessary calculation processing work in the later period; the threshold value can be obtained by a plurality of tests in advance according to conditions such as the quality of the vehicle, and the invention will not be described in detail herein.
When a vehicle is in collision, the degree of force of the collision directly determines the degree of the injury of the vehicle body and the safety condition of passengers, and therefore, a calculation method for the collision force is further provided in one embodiment of the invention, wherein firstly, the elastic wave signal needs to be converted into a voltage signal with a corresponding frequency or a voltage signal with an equal proportional frequency according to the frequency of the elastic wave signal. In this embodiment, the method for calculating the collision strength in step S103 mainly calculates the energy value of the elastic wave signal by converting the elastic wave signal into the voltage signal with the corresponding frequency, and then determines the collision strength according to the energy value of the elastic wave signal, specifically, the energy value of the collision data is calculated according to the amplitude of the collision data, and the collision strength of the vehicle is obtained according to the energy value of the collision data. In practice, one or more piezoelectric sensors C may be utilized1To CnRespectively converting the respectively received elastic wave signals into voltage signals D with the frequencies consistent with those of the elastic wave signals received by the elastic wave signals1To DnAccording to the voltage signals D1To DnRespectively calculating the energy value E of each voltage signal1To EnAnd finally, the energy value E is used1To EnTo obtain a final value of the total energy of the elastic wave (when only one energy value E is obtained)1When the sum is not accumulated and averaged or 1 × E11), the total energy value of the elastic wave can reflect the pressure information generated by the vehicle during collision, and therefore the actual force information is obtained; it is worth mentioning that, in the above process, the method of calculating the energy value from the voltage signalIt can be calculated mainly by the following formula:
in the above formula, m is the number of collected signal points; n is the number of signal points determined by selecting the wavelength of the voltage signal with the preset length according to the actual situation, and related technicians in the field can select the setting according to the actual needs, and the invention is not further limited herein; e is the energy value of the voltage signal.
As shown in fig. 2, in an embodiment of the present invention, the step S103 of calculating a collision trajectory of the vehicle according to the collision data further includes: and calculating to obtain the collision track of the vehicle according to the position of the collision sensor receiving the elastic wave signals and the sequence of the collision sensor receiving the elastic wave signals. In this embodiment, since the positions of the crash sensors are preset and confirmed, and at the same time, when the vehicle crashes, a specific number of crash sensors must receive stronger elastic wave signals, so that the crash sensors that receive the elastic wave signals with the highest amplitudes can be sorted according to the time when the crash sensors receive the elastic wave signals, and then the actual crash trajectories can be obtained according to the positions of the crash sensors, for example, the crash sensors a1, a2, and A3 receive elastic wave signals larger than the elastic wave signals received by other crash sensors at the time of B1, B2, and B3, and then the crash sensors at this moment are in the order of a1 to a2 to A3, and then the actual crash trajectories can be obtained by using a1 as the starting point and A3 as the ending point according to the actual positions of the crash sensors.
Referring to fig. 3, in another embodiment of the present invention, the step S102 of calculating the collision trajectory of the vehicle according to the collision data further includes: calculating and obtaining a signal characteristic value of the voltage signal through the collision data; comparing the signal characteristic value with a pre-stored reference characteristic value, and obtaining a collision coordinate position according to a comparison result; and obtaining the collision track according to the collision coordinate position. Specifically, a characteristic model can be established through a machine learning algorithm and/or a deep learning algorithm according to a voltage signal obtained from a pre-stage collision preset position, and a signal characteristic value of the voltage signal is obtained through calculation according to the voltage signal and the characteristic model; the characteristic value extraction module can establish a characteristic model through a machine learning algorithm and/or a deep learning algorithm according to the voltage signal obtained by the collision preset position and the corresponding reference characteristic value. Specifically, in actual work, a worker can collect an elastic wave signal generated by collision at a designated position in advance, convert the elastic wave signal into a voltage signal, train the voltage signal as an input signal through a machine learning algorithm and/or a deep learning algorithm to obtain a feature model for extracting a signal feature value in the voltage signal, and manually analyze a feature part with higher difference in the voltage signal to obtain a feature value corresponding to the voltage signal, wherein the feature value is a reference feature value corresponding to the voltage signal; at the moment, the voltage signal is used as input, the reference characteristic value is used as output, and a characteristic model is established through a deep learning algorithm or a machine learning algorithm; and when the actual user collides, the calculated voltage signal can be analyzed and calculated through the feature model to obtain the corresponding signal feature value. Certainly, in actual work, a characteristic model can be obtained by collecting voltage signals generated by mass collisions and utilizing the voltage signals through a machine learning algorithm and/or a deep learning algorithm, a signal characteristic value of the collision can be obtained through the characteristic model and the voltage signals generated by actual touch of a user in the later period, and then a real position is obtained according to the signal characteristic value; the invention is not limited in detail, and those skilled in the art can select the application according to the actual needs.
Referring to fig. 5, since the source of the elastic wave signal is directly related to the vibration condition of the vehicle body, the vibration condition of the vehicle during driving and starting and stopping may also include the elastic wave signal, such as engine vibration, active or passive jolt during driving of the vehicle, etc.; at this time, the elastic wave signals generated by the vibrations are not generated by the collision, belong to the internal noise of the vehicle, and in order to avoid the internal noise from affecting the calculation of the actual collision data in the later period, in an embodiment of the present invention, the vehicle collision protection method may further include: obtaining a vibration frequency or amplitude range of a vehicle engine, obtaining vehicle internal noise data according to the vibration frequency or amplitude range of the vehicle engine, and comparing the voltage signal with the internal noise data to obtain the collision data; and/or comparing every two elastic wave signals received by at least three collision sensors on the same part of the vehicle, and converting the elastic wave signals into voltage signals when the difference ratio of the two elastic wave signals is greater than a preset threshold value. In this embodiment, since the internal noise of the vehicle 501 is in a state where the elastic wave signals of the same part in the vehicle body have the same direction and the signal magnitudes are proportional, when the elastic wave signals obtained by at least three collision sensors 502 on the same part of the vehicle 501 are in a state where the differences are proportional, it is indicated that the vibration at this time is caused by the internal noise of the vehicle, the elastic wave signals are discarded until the difference is greater than a predetermined ratio, and it is not confirmed that there is an external collision at this time; the installation positions of the crash sensors 502 on the components of the vehicle 501 can be seen in fig. 6A to 6D, in fig. 6A, the installation of the crash sensors 502 with respect to the vehicle door 601 is described, in fig. 6B, the installation of the crash sensors 502 of the vehicle body 602 is shown, in fig. 6C, the installation of the crash sensors 502 of the engine hood or trunk hood shell 603 is shown, and in fig. 6D, the installation of the crash sensors 502 of the front and rear bumpers 604 is shown; of course, in actual work, a worker can also adaptively adjust the installation position of each collision sensor 502 according to actual needs, and the invention is only used as a simple example and does not limit the specific installation position. Furthermore, because the main internal noise of the vehicle is caused by elements such as an engine, the size of the generated elastic wave can be confirmed according to the vibration frequency or amplitude range of the engine, the generated internal noise data can be confirmed according to the size of the elastic wave, and then when the elastic wave signal is generated in collision, the internal noise data can be filtered from the elastic wave signal and then the collision data can be calculated to accurately obtain the actual collision result. Of course, other methods for reducing the internal noise exist in practical work, such as confirming the strength and direction of the elastic wave signal generated by the internal noise in advance, and performing screening by comparing the detected elastic wave signals, which is not described in detail herein.
In summary, applying the vehicle collision protection method provided by the present invention to actual work may specifically include the following procedures: in the normal running process of the vehicle, when the collision sensor collects an elastic wave signal exceeding a threshold value once, the collection channel is opened to continuously collect the elastic wave signal for 5ms, the energy of the elastic wave signal is calculated through a prefabricated algorithm, and the energy is accumulated to obtain the collision force E1; continuously detecting at high frequency for a plurality of times after the collision signal, and judging whether continuous collision signals exist; if no collision is detected, ending the high-frequency detection step, entering a normal detection state, representing that the collision is an accident and not a collision accident, and if continuous detection is available, obtaining continuous collision forces E1, E2, … … and En according to the steps until the collision disappears; simultaneously, the position of the collision signal is marked as a1 st contact point, a2 nd contact point, … … th contact point and an n th contact point, the position information of the contact point is synchronously calculated when the energy is calculated, the 1 st contact point, the 2 nd contact point, the … … th contact point and the n th contact point coordinate (x1, 2, … …, n, y1, 2, … …, n) are simultaneously marked as a1 st time point, a2 nd contact point, … … th contact point and an n th time point, the time points correspond to the collision force and the contact point position one by one, and a relation curve graph with the collision position and the force as vertical coordinates is drawn by taking the non-time points as horizontal coordinates; the curve graph is sent to an automobile central control system, vehicle condition information, road condition information and the relation curve graph are transmitted to big data through the networking function of the central control system, an optimal processing scheme is given through analysis and judgment of the big data, and the central control system executes corresponding actions according to the processing scheme.
Referring to fig. 4, the present invention further provides a vehicle collision protection device, which includes a data acquisition module, an analysis module, a calculation module and a plurality of collision sensors; the collision sensor is arranged on a vehicle shell and used for acquiring an elastic wave signal generated by collision outside the vehicle and converting the elastic wave signal into a voltage signal; the data acquisition module is used for acquiring collision data and vehicle operation parameters when the energy value of the voltage signal is higher than a preset threshold value; the analysis module is used for calculating and obtaining the collision force, the collision track and the collision time of the vehicle according to the collision data; the calculation module is used for obtaining a prestored processing scheme through the collision force, the collision track, the collision time and the operation parameters, and controlling the vehicle to execute corresponding actions according to the processing scheme.
In the above embodiment, the collision sensor includes: and converting the elastic wave signal into a voltage signal with corresponding frequency or a voltage signal with equal proportional frequency according to the frequency of the elastic wave signal. Then, the analysis module 403 calculates an energy value of the collision data according to the amplitude of the collision data, and obtains the collision force of the vehicle according to the energy value of the collision data. The method is described in detail in the above examples, and the present invention will not be described in detail herein.
In an embodiment of the present invention, the analysis module includes: and calculating to obtain the collision track of the vehicle according to the position of the collision sensor receiving the elastic wave signals and the sequence of the collision sensor receiving the elastic wave signals. And/or calculating and obtaining a signal characteristic value of the voltage signal through the collision data; comparing the signal characteristic value with a pre-stored reference characteristic value, and obtaining a collision coordinate position according to a comparison result; and obtaining the collision track according to the collision coordinate position.
In an embodiment of the present invention, the vehicle collision protection device further includes a denoising module, where the denoising module is configured to compare two elastic wave signals received by at least three collision sensors with distances smaller than a predetermined threshold value, and convert the elastic wave signals into voltage signals when a difference ratio between the two elastic wave signals is larger than the predetermined threshold value. And/or comparing every two elastic wave signals received by at least three collision sensors on the same part of the vehicle, and converting the elastic wave signals into voltage signals when the difference ratio of the two elastic wave signals is greater than a preset threshold value.
The vehicle collision protection method and the vehicle collision protection device can effectively detect the external collision condition of the vehicle, accurately confirm the current state of the vehicle according to the collision conditions, help a driver to provide a more accurate braking scheme and guarantee the life and property safety of the driver and passengers.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (12)
1. A method of vehicle collision protection, the method comprising:
obtaining elastic wave signals generated by collision outside a vehicle through a plurality of collision sensors arranged on a vehicle shell, and converting the elastic wave signals into voltage signals;
when the energy value of the voltage signal is higher than a preset threshold value, obtaining collision data and the running parameters of the vehicle;
calculating and obtaining the collision force, the collision track and the collision time of the vehicle according to the collision data;
obtaining a prestored processing scheme through the collision force, the collision track, the collision time and the operation parameters, and controlling the vehicle to execute corresponding actions according to the processing scheme;
the step of calculating and obtaining the collision track of the vehicle according to the collision data comprises the following steps: calculating and obtaining a signal characteristic value of the voltage signal through the collision data; comparing the signal characteristic value with a pre-stored reference characteristic value, and obtaining a collision coordinate position according to a comparison result; and obtaining the collision track according to the collision coordinate position.
2. The vehicle collision protection method according to claim 1, wherein converting the elastic wave signal into a voltage signal comprises: and the collision sensor converts the elastic wave signal into a voltage signal with corresponding frequency or a voltage signal with equal proportional frequency according to the frequency of the elastic wave signal.
3. The vehicle collision protection method according to claim 2, wherein calculating the collision force of the vehicle from the collision data comprises: and calculating to obtain an energy value of the collision data according to the amplitude of the collision data, and obtaining the collision force of the vehicle according to the energy value of the collision data.
4. The vehicle collision protection method according to claim 1, wherein calculating the collision trajectory of the vehicle from the collision data comprises: and calculating to obtain the collision track of the vehicle according to the position of the collision sensor receiving the elastic wave signals and the sequence of the collision sensor receiving the elastic wave signals.
5. The vehicle collision protecting method according to claim 1, further comprising: obtaining the vibration frequency or amplitude range of a vehicle engine, obtaining vehicle internal noise data according to the vibration frequency or amplitude range of the vehicle engine, and comparing the voltage signal with the internal noise data to obtain the collision data.
6. The vehicle collision protecting method according to claim 1, further comprising: and comparing every two elastic wave signals received by at least three collision sensors on the same part of the vehicle, and converting the elastic wave signals into voltage signals when the difference ratio of the two elastic wave signals is greater than a preset threshold value.
7. A vehicle collision protection device is characterized by comprising a data acquisition module, an analysis module, a calculation module and a plurality of collision sensors;
the collision sensor is arranged on a vehicle shell and used for acquiring an elastic wave signal generated by collision outside the vehicle and converting the elastic wave signal into a voltage signal;
the data acquisition module is used for acquiring collision data and vehicle operation parameters when the energy value of the voltage signal is higher than a preset threshold value;
the analysis module is used for calculating and obtaining the collision force, the collision track and the collision time of the vehicle according to the collision data;
the computing module is used for obtaining a prestored processing scheme through the collision force, the collision track, the collision time and the operation parameters, and controlling the vehicle to execute corresponding actions according to the processing scheme;
the analysis module comprises: calculating and obtaining a signal characteristic value of the voltage signal through the collision data; comparing the signal characteristic value with a pre-stored reference characteristic value, and obtaining a collision coordinate position according to a comparison result; and obtaining the collision track according to the collision coordinate position.
8. The vehicle crash guard of claim 7 wherein said crash sensor comprises: and converting the elastic wave signal into a voltage signal with corresponding frequency or a voltage signal with equal proportional frequency according to the frequency of the elastic wave signal.
9. The vehicle crash shield apparatus of claim 8, wherein said analysis module comprises: and calculating to obtain an energy value of the collision data according to the amplitude of the collision data, and obtaining the collision force of the vehicle according to the energy value of the collision data.
10. The vehicle crash shield apparatus of claim 7 wherein said analysis module comprises: and calculating to obtain the collision track of the vehicle according to the position of the collision sensor receiving the elastic wave signals and the sequence of the collision sensor receiving the elastic wave signals.
11. The vehicle crash shield apparatus as recited in claim 7, further comprising a de-noising module configured to obtain a range of vehicle engine vibration frequencies or amplitudes, obtain vehicle internal noise data based on the range of vehicle engine vibration frequencies or amplitudes, and compare the voltage signal to the internal noise data to obtain the crash data.
12. The vehicle crash protection device according to claim 7, further comprising a noise elimination module for comparing two elastic wave signals received by at least three crash sensors on the same component of the vehicle, and converting the elastic wave signals into voltage signals when the difference ratio between the two elastic wave signals is greater than a predetermined threshold.
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| CN201810278114.0A CN110316131B (en) | 2018-03-30 | 2018-03-30 | Vehicle collision protection method and device |
| PCT/CN2019/080541 WO2019185045A1 (en) | 2018-03-30 | 2019-03-29 | Transport device collision detection, alarm, and guard method |
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| CN201810278114.0A CN110316131B (en) | 2018-03-30 | 2018-03-30 | Vehicle collision protection method and device |
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| CN112763117A (en) * | 2019-11-01 | 2021-05-07 | 北京钛方科技有限责任公司 | Touch detection method and device |
| DE102020205717A1 (en) * | 2020-05-06 | 2021-11-11 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method and device for controlling occupant protection means for a vehicle in the event of a collision of the vehicle and occupant protection system for a vehicle |
| CN114426004B (en) * | 2020-10-29 | 2022-12-09 | 北京钛方科技有限责任公司 | Collision object type identification method and device |
| CN113147648B (en) * | 2021-03-03 | 2022-07-01 | 西华大学 | Dot-matrix airbag popping judgment system and judgment method for unmanned vehicle |
| CN113085770A (en) * | 2021-04-15 | 2021-07-09 | 西华大学 | Special safety airbag control method based on BP neural network algorithm |
| CN114174793A (en) * | 2021-11-03 | 2022-03-11 | 焦旭 | Real-time detection system for vehicle body vibration and automobile |
| CN116277029B (en) * | 2023-04-26 | 2024-04-09 | 北京朴津智能科技有限公司 | All-round collision device and mobile robot |
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