CN113487761A - Video recording starting method for automobile data recorder, program and medium - Google Patents
Video recording starting method for automobile data recorder, program and medium Download PDFInfo
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- CN113487761A CN113487761A CN202110741233.7A CN202110741233A CN113487761A CN 113487761 A CN113487761 A CN 113487761A CN 202110741233 A CN202110741233 A CN 202110741233A CN 113487761 A CN113487761 A CN 113487761A
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
- G07C5/0841—Registering performance data
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
- G07C5/0841—Registering performance data
- G07C5/085—Registering performance data using electronic data carriers
- G07C5/0866—Registering performance data using electronic data carriers the electronic data carrier being a digital video recorder in combination with video camera
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
- G07C5/0841—Registering performance data
- G07C5/0875—Registering performance data using magnetic data carriers
- G07C5/0891—Video recorder in combination with video camera
Abstract
The invention discloses a video starting method of an automobile data recorder, the automobile data recorder, a program and a medium, wherein the method comprises the following steps: after the vehicle is flamed out, acquiring the current ultrasonic data of the ultrasonic sensor and the decibel data of the decibel tester; and if the moving obstacle exists in a preset range and the decibel data are larger than a preset decibel threshold value based on the ultrasonic data, starting a video recording function of the automobile data recorder. The invention reduces the electric quantity consumption of the automobile data recorder after the automobile is stopped and flamed out on the basis of ensuring the effective recording of the automobile data recorder to the abnormal state.
Description
Technical Field
The present invention relates to the field of automobile driving, and in particular, to a video recording start method for an automobile data recorder, a program, and a medium.
Background
Most of the existing automobile data recorders are equipped with a parking detection video recording function, and the detection function is started after a vehicle stops and stops, and the existing technology mainly utilizes a lens of the automobile data recorder to shoot in a preview mode or in a frame dropping mode, and detects whether the shot picture changes so as to determine whether to start the video recording.
For example, the lens of the current car recorder consumes about 300 milliamperes (mA) in the preview mode, and the built-in battery of the commercial car recorder is generally only hundreds to thousands of milliamperes hours (mAh), which is only about 1 to 3 hours continuously. However, in general, the user may park the vehicle for more than 8 hours, so that the car recorder cannot provide the video recording function after more than 1 to 3 hours, and the video recording picture cannot be provided as evidence when the condition occurs; in addition, if the automobile data recorder is connected to the automobile body power supply, the automobile body power supply can be exhausted, so that the automobile cannot be started; the application number 201710487810.8 discloses a method for starting a parking video, which comprises the steps of detecting illumination every unit time and obtaining an illumination value, and then starting a video recording module according to the fact that the variation of the two illuminations exceeds a preset threshold value; however, the judgment mode of the illumination intensity is not suitable for all parking scenes, for example, in the daytime, the illumination intensity may not change greatly, so that it is difficult to start the video recording function in time when the condition occurs, and the automobile data recorder does not record the key information as the evidence.
Disclosure of Invention
In view of this, embodiments of the present application provide a method for starting a video recording of an automobile data recorder, a program, and a medium, which reduce power consumption of the video recording of the automobile data recorder after a vehicle is stopped and flamed out on the basis of ensuring effective recording of the automobile data recorder on an abnormal state.
The embodiment of the application provides a video recording starting method of an automobile data recorder, which is applied to the automobile data recorder, wherein the automobile data recorder comprises an ultrasonic sensor and a decibel tester, and the method comprises the following steps:
after the vehicle is flamed out, acquiring the current ultrasonic data of the ultrasonic sensor and the decibel data of the decibel tester;
and if the moving obstacle exists in a preset range and the decibel data are larger than a preset decibel threshold value based on the ultrasonic data, starting a video recording function of the automobile data recorder.
In an embodiment, before the step of starting the recording function of the car event recorder if it is determined that a moving obstacle exists within a preset range and the decibel data is greater than a preset decibel threshold based on the ultrasonic data, the method includes:
judging whether an obstacle exists in a preset range based on the ultrasonic data;
if the obstacle exists, the distance between the ultrasonic sensor and the obstacle is obtained for multiple times at a unit time interval;
and if a difference value is generated between the distances between the ultrasonic sensor and the obstacle for multiple times, judging that a moving obstacle exists in the preset range.
In one embodiment, the acquiring the distance between the ultrasonic sensor and the obstacle includes:
performing distance measurement of an obstacle using ultrasonic waves of a first frequency;
if the distance of the obstacle is larger than a first preset distance, adjusting the ultrasonic wave of the first frequency into the ultrasonic wave of the second frequency to measure the distance of the obstacle; wherein the second frequency is greater than the first frequency;
and if the distance of the obstacle is smaller than a first preset distance, continuously using the ultrasonic wave with the first frequency to measure the distance of the obstacle.
In one embodiment, the distance measurement of the obstacle using the ultrasonic wave of the first frequency includes:
acquiring the time difference between the sending and receiving of the ultrasonic wave of the first frequency;
and calculating and obtaining the distance of the obstacle based on the time difference and the current sound velocity.
In an embodiment, before the step of calculating the distance to the obstacle based on the time difference and the current sound speed, the method includes:
acquiring an environmental temperature value;
and calculating to obtain the current sound speed based on the environment temperature value.
In an embodiment, the method further comprises:
after the automobile data recorder starts a video recording function, timing operation is executed;
if the video recording time is longer than or equal to the preset time, based on the ultrasonic data, it is judged that no moving obstacle exists in the preset range and the decibel data are smaller than the preset decibel threshold value, and the video recording function of the automobile data recorder is closed.
In an embodiment, after the step of executing a timing operation after the recording function of the car event data recorder, the method further includes:
if the video recording time length is greater than or equal to the preset time length, based on the ultrasonic data, judging that a moving obstacle exists in a preset range and the decibel data is greater than a preset decibel threshold value, generating an alarm signal and sending the alarm signal to a user terminal.
To achieve the above object, there is also provided a computer program product, including a computer program, where the computer program is executed by a processor to implement the steps of the video recording start method of a car event data recorder.
In order to achieve the above object, a computer storage medium is further provided, where a program of a video recording start method of a vehicle event data recorder is stored on the computer storage medium, and when executed by a processor, the program of the video recording start method of the vehicle event data recorder implements the steps of any one of the above video recording start methods of the vehicle event data recorder.
In order to achieve the above object, a driving recorder is further provided, which includes a memory, a processor, and a program of a video recording starting method of the driving recorder stored in the memory and operable on the processor, where the processor implements the steps of any one of the above video recording starting methods of the driving recorder when executing the program of the video recording starting method of the driving recorder.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: after the vehicle is flamed out, acquiring the current ultrasonic data of the ultrasonic sensor and the decibel data of the decibel tester; by correctly acquiring ultrasonic data and respective data of the ultrasonic sensor and the decibel tester, correct judgment is made for the starting time of the subsequent video recording function, so that the electric quantity consumption of the automobile data recorder is reduced.
And if the moving obstacle exists in a preset range and the decibel data are larger than a preset decibel threshold value based on the ultrasonic data, starting a video recording function of the automobile data recorder. Through the setting of two conditions, inject the opening moment of vehicle event data recorder video recording function to continuous work leads to the condition emergence of electric quantity exhaustion after avoiding vehicle event data recorder to park. The invention reduces the electric quantity consumption of the automobile data recorder after the automobile is stopped and flamed out on the basis of ensuring the effective recording of the automobile data recorder to the abnormal state.
Drawings
Fig. 1 is a schematic flowchart of a video recording start method of an automobile data recorder according to a first embodiment of the present application;
fig. 2 is a schematic flowchart of a video recording start method of an automobile data recorder according to a second embodiment of the present application;
fig. 3 is a specific implementation step of step S230 of the video recording starting method of the automobile data recorder of the present application;
fig. 4 is a specific implementation step of step S231 of the video recording start method of the automobile data recorder of the present application;
fig. 5 is a schematic flowchart of a video recording start method of an automobile data recorder according to a third embodiment of the present application;
fig. 6 is a schematic diagram of a hardware architecture of the automobile data recorder according to the present application.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows: after the vehicle is flamed out, acquiring the current ultrasonic data of the ultrasonic sensor and the decibel data of the decibel tester; and if the moving obstacle exists in a preset range and the decibel data are larger than a preset decibel threshold value based on the ultrasonic data, starting a video recording function of the automobile data recorder. The invention reduces the electric quantity consumption of the automobile data recorder after the automobile is stopped and flamed out on the basis of ensuring the effective recording of the automobile data recorder to the abnormal state.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Referring to fig. 1, fig. 1 is a first embodiment of a video recording start method of an automobile data recorder according to the present application, and is applied to the automobile data recorder, where the automobile data recorder includes an ultrasonic sensor and a decibel tester, and the method includes:
specifically, the car recorder is an instrument for recording the image and sound of the vehicle during driving. After the automobile data recorder is installed, the video images and the sound of the whole automobile driving process can be recorded, and evidence can be provided for traffic accidents.
An ultrasonic sensor is a sensor that converts an ultrasonic signal into another energy signal (typically an electrical signal). Ultrasonic waves are mechanical waves with a vibration frequency higher than 20 kHz. It has the features of high frequency, short wavelength, less diffraction, high directivity, directional propagation, etc.
The decibel tester may be an instrument that tests the decibels of sound.
Step S110: and after the vehicle is flamed out, acquiring the current ultrasonic data of the ultrasonic sensor and the decibel data of the decibel tester.
Specifically, the ultrasonic data may include an ultrasonic transmission frequency, an ultrasonic transmission timing, an ultrasonic reception timing, and the like; the decibel data may include a distribution value.
It should be noted that, the present embodiment is not limited to starting to acquire the current ultrasonic data of the ultrasonic sensor and the decibel data of the decibel tester after the vehicle is turned off; similarly, after the vehicle is flamed out and the user leaves and executes the vehicle locking operation, the ultrasonic data of the ultrasonic sensor and the decibel data of the decibel tester are obtained; the present invention is not limited herein, and may be adjusted according to the needs of the user.
Step S120: and if the moving obstacle exists in a preset range and the decibel data are larger than a preset decibel threshold value based on the ultrasonic data, starting a video recording function of the automobile data recorder.
Specifically, the preset decibel threshold value may be 55 decibels, and the preset decibel threshold value range may be 45 decibels to 55 decibels; the setting may be specifically performed according to the requirement of the user, and is not limited herein.
Specifically, the preset range may be a circular range with the center of the vehicle as an origin and a radius of 2 meters; or an ellipse range with the center of the vehicle as the origin, and the size of the range can be adjusted according to the requirements of users.
It should be further noted that the condition for starting the video recording function of the car event data recorder may also be that a moving obstacle exists within a preset range, or that decibel data is greater than a preset decibel threshold, or that a moving obstacle exists within a preset range used in this embodiment and decibel data is greater than a preset decibel threshold; the setting is not limited herein, and may be set according to the user's needs.
In the above embodiment, there are advantageous effects of: after the vehicle is flamed out, acquiring the current ultrasonic data of the ultrasonic sensor and the decibel data of the decibel tester; by correctly acquiring ultrasonic data and respective data of the ultrasonic sensor and the decibel tester, correct judgment is made for the starting time of the subsequent video recording function, so that the electric quantity consumption of the automobile data recorder is reduced.
And if the moving obstacle exists in a preset range and the decibel data are larger than a preset decibel threshold value based on the ultrasonic data, starting a video recording function of the automobile data recorder. Through the setting of two conditions, inject the opening moment of vehicle event data recorder video recording function to continuous work leads to the condition emergence of electric quantity exhaustion after avoiding vehicle event data recorder to park. The invention reduces the electric quantity consumption of the automobile data recorder after the automobile is stopped and flamed out on the basis of ensuring the effective recording of the automobile data recorder to the abnormal state.
Referring to fig. 2, fig. 2 is a second embodiment of a video recording starting method of an automobile data recorder according to the present application, where the determining that a moving obstacle exists within a preset range based on the ultrasonic data includes:
step S210: after the vehicle is flamed out, acquiring the current ultrasonic data of the ultrasonic sensor and the decibel data of the decibel tester;
step S220: and judging whether an obstacle exists in a preset range or not based on the ultrasonic data.
Specifically, the ultrasonic data may be analyzed to acquire time information of the transmission time and the reception time, and the time information may be used to determine the distance to the obstacle.
Step S230: and if the obstacle exists, acquiring the distance between the ultrasonic sensor and the obstacle for multiple times at a unit time interval.
Specifically, on the basis of the existence of the obstacle, it is further determined whether the obstacle is a moving obstacle, and the distance between the ultrasonic sensor and the obstacle is acquired a plurality of times at every unit time. The unit time can be 1 second or 30 milliseconds, and the smaller the unit time of the interval is, the more accurate the judgment on whether the barrier moves is; the unit time may be less than or equal to 1S, which is not limited herein, and may be dynamically adjusted according to the requirement.
Step S240: and if a difference value is generated between the distances between the ultrasonic sensor and the obstacle for multiple times, judging that a moving obstacle exists in the preset range.
Specifically, the ultrasonic sensor sends out ultrasonic waves every 1 second, for example, and the distance S1 between the first ultrasonic sensor and the obstacle, the distance S2 between the second ultrasonic sensor and the obstacle, and the distance S3 between the third ultrasonic sensor and the obstacle are measured; if the difference value among S1, S2 and S3 is obtained through calculation, the obstacle is indicated to move, and the moving obstacle in the preset range is judged to exist.
Step S250: and if the moving obstacle exists in a preset range and the decibel data are larger than a preset decibel threshold value based on the ultrasonic data, starting a video recording function of the automobile data recorder.
Compared with the first embodiment, the second embodiment includes step S220, step S230 and step S240, and other steps have already been described in the first embodiment and are not repeated herein.
In the above embodiment, there are advantageous effects of: through the correct judgment on the moving barrier, the timeliness of the automobile data recorder at the moment of starting the video recording is guaranteed, the electric quantity consumption of the automobile data recorder is further reduced on the basis of recording abnormal conditions, and the service time of the automobile data recorder is prolonged.
Referring to fig. 3, fig. 3 is a specific implementation step of step S230 of a video recording starting method of an automobile data recorder according to the present application, where the acquiring a distance between the ultrasonic sensor and the obstacle includes:
step S231: distance measurement of an obstacle is performed using ultrasonic waves of a first frequency.
In particular, the first frequency is greater than or equal to 75 kHz; in this embodiment, the distance measurement of the obstacle is performed using an ultrasonic wave of 75 kHz.
Step S232: if the distance of the obstacle is larger than a first preset distance, adjusting the ultrasonic wave of the first frequency into the ultrasonic wave of the second frequency to measure the distance of the obstacle; wherein the second frequency is greater than the first frequency.
Specifically, the range of the first preset distance is 55-195 cm; specifically, in this embodiment, 110cm is used as a first preset distance; among them, if the distance of the obstacle is more than 110cm, the frequency of the ultrasonic wave is increased, and it is preferable to use the method for increasing the accuracy of the obstacle distance measurement.
Step S233: and if the distance of the obstacle is smaller than a first preset distance, continuously using the ultrasonic wave with the first frequency to measure the distance of the obstacle.
Specifically, if the distance of the obstacle is less than 110cm, the distance of the obstacle is measured by using the ultrasonic wave of the first frequency, wherein the first frequency is lower than the second frequency, so that the power consumption of the ultrasonic sensor is reduced, that is, the power consumption of the automobile data recorder is reduced.
In the above embodiment, there are advantageous effects of: through the judgement to first preset distance, according to the distance of difference, adopt high low frequency ultrasonic wave to carry out the distance measurement of barrier, need not keep high-frequency ultrasonic wave transmission all the time, then further reduce ultrasonic sensor's power consumption.
Referring to fig. 4, fig. 4 is a specific implementation step of step S231 of the video recording start method of the automobile data recorder according to the present application, where the step of measuring the distance to the obstacle using the ultrasonic wave of the first frequency includes:
step S2311: acquiring the time difference between the sending and receiving of the ultrasonic wave of the first frequency;
step S2312: and acquiring an ambient temperature value.
Specifically, since the temperature in the measurement environment has a certain influence on the sound velocity, under the same medium, the higher the ambient temperature is, the faster the sound velocity is, for example, the difference between the sound velocity at 0 ℃ and the sound velocity at 15 ℃ is about 8.6 m/s; therefore, when measuring a distance, there is an error in the measured distance value due to a temperature difference of the environment, and the error has a serious influence in a case where a high distance measurement accuracy is required.
It should be noted that the ambient temperature may also be obtained multiple times, and the average value is taken as the ambient temperature value.
Step S2313: and calculating to obtain the current sound speed based on the environment temperature value.
Specifically, it can be calculated by the following formula:
wherein, VTIs the current speed of sound at T degrees Celsius, T being the thermodynamic value of the ambient temperature value.
Step S2314: and calculating and obtaining the distance of the obstacle based on the time difference and the current sound velocity.
Specifically, half of the product of the time difference and the current sound velocity is taken as the distance of the obstacle;
step S2315: if the distance of the obstacle is larger than a first preset distance, adjusting the ultrasonic wave of the first frequency into the ultrasonic wave of the second frequency to measure the distance of the obstacle; wherein the second frequency is greater than the first frequency.
Step S2316: and if the distance of the obstacle is smaller than a first preset distance, continuously using the ultrasonic wave with the first frequency to measure the distance of the obstacle.
Compared with the above embodiments, the present embodiment includes step S2314, step S2315, step S2316; other steps have already been described and are not described in detail herein.
In the above embodiment, there are advantageous effects of: the influence of the current temperature on the ultrasonic sound velocity is added, and the distance precision between the ultrasonic sensor and the barrier is improved, so that the starting and recording of the automobile data recorder are more accurate, and the power consumption of the automobile data recorder is reduced.
Referring to fig. 5, fig. 5 is a third embodiment of a video recording start method of an automobile data recorder according to the present application, where the method further includes:
step S310: and after the vehicle is flamed out, acquiring the current ultrasonic data of the ultrasonic sensor and the decibel data of the decibel tester.
Step S320: and if the moving obstacle exists in a preset range and the decibel data are larger than a preset decibel threshold value based on the ultrasonic data, starting a video recording function of the automobile data recorder.
Step S330: and executing timing operation after the automobile data recorder starts the video recording function.
Specifically, after the automobile data recorder starts the video recording function, the time is recorded through a timing module.
Step S340: if the video recording time is longer than or equal to the preset time, based on the ultrasonic data, it is judged that no moving obstacle exists in the preset range and the decibel data are smaller than the preset decibel threshold value, and the video recording function of the automobile data recorder is closed.
Specifically, the preset time period may be less than or equal to 2 minutes, which is not limited herein and may be set according to the requirement of the user. When the video recording time is longer than or equal to 2 minutes, judging whether a moving obstacle exists in the preset range or not and whether the decibel data are larger than the preset decibel threshold value or not again, and if the moving obstacle does not exist and the decibel data are smaller than the preset decibel threshold value, closing the video recording function of the automobile data recorder, and greatly reducing the power consumption of the automobile data recorder.
Step S350: if the video recording time length is greater than or equal to the preset time length, based on the ultrasonic data, judging that a moving obstacle exists in a preset range and the decibel data is greater than a preset decibel threshold value, generating an alarm signal and sending the alarm signal to a user terminal.
Specifically, when the video recording time is longer than or equal to 2 minutes, judging whether a moving obstacle exists in a preset range and whether decibel data are larger than a preset decibel threshold value or not through ultrasonic data again, and when the moving obstacle exists in the preset range and the decibel data are larger than the preset decibel threshold value, generating an alarm signal and sending the alarm signal to a user terminal; the alarm signal can be used for giving an alarm through the light flicker of the automobile data recorder or the alarm sound so as to protect the safety of the vehicle.
Specifically, the user terminal may be a smart phone, a smart band, a smart watch, and the like, which is not limited herein.
Compared with the first embodiment, the third embodiment includes step S230, step S240 and step S250, and other steps have already been described in the first embodiment and are not repeated herein.
In the embodiment, the time after the video recording function is started is recorded, so that the video recording state of the automobile data recorder does not need to be kept for a long time, the power consumption of the automobile data recorder is reduced, meanwhile, alarm information can be generated, and the safety of a vehicle is further ensured.
The present application further provides a computer program product, including a computer program, where the computer program, when executed by a processor, implements the steps of any of the above-mentioned video recording start methods for a car event data recorder.
The application also provides a computer storage medium, wherein a video starting method program of the automobile data recorder is stored on the computer storage medium, and when being executed by a processor, the video starting method program of the automobile data recorder realizes the steps of any one of the video starting methods of the automobile data recorder.
The application also provides a vehicle event data recorder which comprises a storage, a processor and a program of a video starting method of the vehicle event data recorder, wherein the program of the video starting method of the vehicle event data recorder is stored on the storage and can run on the processor, and the step of the video starting method of the vehicle event data recorder is realized when the processor executes the program of the video starting method of the vehicle event data recorder.
The present application relates to a car event data recorder 010 includes as shown in fig. 6: at least one processor 012, memory 011.
The processor 012 may be an integrated circuit chip having signal processing capability. In implementation, the steps of the method may be performed by hardware integrated logic circuits or instructions in the form of software in the processor 012. The processor 012 may be a general-purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 011, and the processor 012 reads the information in the memory 011 and completes the steps of the method in combination with the hardware.
It is to be understood that the memory 011 in embodiments of the present invention can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile Memory may be a Read Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double data rate Synchronous Dynamic random access memory (ddr DRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 011 of the systems and methods described in connection with the embodiments of the invention is intended to comprise, without being limited to, these and any other suitable types of memory.
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.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A video starting method of a vehicle event data recorder is applied to the vehicle event data recorder, the vehicle event data recorder comprises an ultrasonic sensor and a decibel tester, and the method is characterized by comprising the following steps:
after the vehicle is flamed out, acquiring the current ultrasonic data of the ultrasonic sensor and the decibel data of the decibel tester;
and if the moving obstacle exists in a preset range and the decibel data are larger than a preset decibel threshold value based on the ultrasonic data, starting a video recording function of the automobile data recorder.
2. The video recording starting method of the automobile data recorder according to claim 1, wherein before the step of starting the video recording function of the automobile data recorder if it is determined that a moving obstacle exists within a preset range and the decibel data is greater than a preset decibel threshold value based on the ultrasonic data, the method includes:
judging whether an obstacle exists in a preset range based on the ultrasonic data;
if the obstacle exists, the distance between the ultrasonic sensor and the obstacle is obtained for multiple times at a unit time interval;
and if a difference value is generated between the distances between the ultrasonic sensor and the obstacle for multiple times, judging that a moving obstacle exists in the preset range.
3. The video recording start method for a car recorder according to claim 2, wherein the acquiring the distance between the ultrasonic sensor and the obstacle comprises:
performing distance measurement of an obstacle using ultrasonic waves of a first frequency;
if the distance of the obstacle is larger than a first preset distance, adjusting the ultrasonic wave of the first frequency into the ultrasonic wave of the second frequency to measure the distance of the obstacle; wherein the second frequency is greater than the first frequency;
and if the distance of the obstacle is smaller than a first preset distance, continuously using the ultrasonic wave with the first frequency to measure the distance of the obstacle.
4. The video recording start method of a car recorder according to claim 3, wherein the distance measurement of the obstacle using the ultrasonic wave of the first frequency includes:
acquiring the time difference between the sending and receiving of the ultrasonic wave of the first frequency;
and calculating and obtaining the distance of the obstacle based on the time difference and the current sound velocity.
5. The video recording start method of the car recorder according to claim 4, wherein the step of calculating the distance to the obstacle based on the time difference and the current sound velocity is preceded by:
acquiring an environmental temperature value;
and calculating to obtain the current sound speed based on the environment temperature value.
6. The video recording start method of a car recorder according to claim 1, further comprising:
after the automobile data recorder starts a video recording function, timing operation is executed;
if the video recording time is longer than or equal to the preset time, based on the ultrasonic data, it is judged that no moving obstacle exists in the preset range and the decibel data are smaller than the preset decibel threshold value, and the video recording function of the automobile data recorder is closed.
7. The video recording starting method of the automobile data recorder according to claim 3, wherein after the step of executing a timing operation after the automobile data recorder starts a video recording function, the method further comprises:
if the video recording time length is greater than or equal to the preset time length, based on the ultrasonic data, judging that a moving obstacle exists in a preset range and the decibel data is greater than a preset decibel threshold value, generating an alarm signal and sending the alarm signal to a user terminal.
8. A computer program product comprising a computer program which, when being executed by a processor, carries out the steps of the video recording start method of a tachograph according to any one of claims 1 to 7.
9. A computer storage medium, characterized in that the computer storage medium stores a program of a video recording start method of a driving recorder, and the program of the video recording start method of the driving recorder realizes the steps of the video recording start method of the driving recorder according to any one of claims 1 to 7 when being executed by a processor.
10. A car event data recorder, comprising a memory, a processor and a program for a video recording start method of a car event data recorder stored in the memory and operable on the processor, wherein the processor implements the steps of the method for a video recording start method of a car event data recorder according to any one of claims 1 to 7 when executing the program for a video recording start method of a car event data recorder.
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