CN113928327B - Method and system for detecting three emergency events - Google Patents
Method and system for detecting three emergency events Download PDFInfo
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- CN113928327B CN113928327B CN202111147234.5A CN202111147234A CN113928327B CN 113928327 B CN113928327 B CN 113928327B CN 202111147234 A CN202111147234 A CN 202111147234A CN 113928327 B CN113928327 B CN 113928327B
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000001133 acceleration Effects 0.000 claims abstract description 139
- 238000004364 calculation method Methods 0.000 claims abstract description 40
- 238000001514 detection method Methods 0.000 claims description 56
- 238000004590 computer program Methods 0.000 claims description 15
- 230000015654 memory Effects 0.000 claims description 14
- 230000000295 complement effect Effects 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 7
- 238000005452 bending Methods 0.000 abstract description 2
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- 235000009776 Rathbunia alamosensis Nutrition 0.000 description 4
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/10—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to vehicle motion
- B60W40/107—Longitudinal acceleration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/10—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to vehicle motion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W2050/0001—Details of the control system
- B60W2050/0043—Signal treatments, identification of variables or parameters, parameter estimation or state estimation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2520/00—Input parameters relating to overall vehicle dynamics
- B60W2520/10—Longitudinal speed
- B60W2520/105—Longitudinal acceleration
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- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
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- Emergency Alarm Devices (AREA)
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Abstract
The embodiment of the invention discloses a method and a system for detecting a three-emergency event, wherein the method comprises the following steps: calibrating a dynamic calibration value in advance; obtaining a calibration result, and calculating the dynamic acceleration and the dynamic angle according to the calibration result; detecting three emergency events according to the calculation result; if the current event is a three-urgent event, acquiring image data of the three-urgent event, and reporting the acquired image data to a background server. According to the embodiment of the invention, the calibration value is dynamically calibrated, so that three emergency false alarms formed by rapid acceleration, rapid deceleration and rapid soft bending caused by calibration are reduced, and after the occurrence of three emergency events, the image acquisition is carried out on an event site, thereby providing convenience for post-query.
Description
Technical Field
The invention relates to the technical field of automobile electronics, in particular to a method and a system for detecting a three-emergency event.
Background
Along with the wide application of the gravity sensor (G-sensor) technology in vehicle-mounted electronic devices, devices for detecting three-urgent (urgent acceleration, urgent deceleration, and urgent turning) driving behaviors by using the three-axis acceleration provided by the G-sensor are more and more, for example: satellite positioning recorder, video recorder, rearview mirror, etc. The three-emergency detection algorithm contained in these devices has the following problems:
because effective dynamic calibration is not carried out, in the use process, the false alarm proportion is higher along with the up and down of different road conditions, and inconvenience is brought to the detection of three emergency events.
The prior art is therefore still in need of further development.
Disclosure of Invention
Aiming at the technical problems, the embodiment of the invention provides a method and a system for detecting three emergency events, which can solve the technical problem of high false alarm proportion caused by the fact that the three emergency event detection method in the prior art is not subjected to effective dynamic calibration.
A first aspect of an embodiment of the present invention provides a method for detecting a three urgent event, including:
calibrating a dynamic calibration value in advance;
obtaining a calibration result, and calculating the dynamic acceleration and the dynamic angle according to the calibration result;
detecting three emergency events according to the calculation result;
if the current event is a three-urgent event, acquiring image data of the three-urgent event, and reporting the acquired image data to a background server.
Optionally, calibrating the dynamic calibration value in advance includes:
acquiring gravitational acceleration through a gravitational sensor;
if the absolute value of the gravitational acceleration within the first time threshold is less than the first threshold; calculating the average value of the triaxial acceleration and the total acceleration in the first time threshold, and determining the front-back axial and the left-right axial to finish the initial calibration of the dynamic calibration value;
if the initial calibration is finished and the absolute value of the gravity acceleration in the first time threshold is smaller than the second threshold, updating the calibration value by the average value of the triaxial acceleration and the total acceleration in the first time threshold, determining the front-rear axis and the left-right axis, and finishing the updating calibration of the dynamic calibration value; if the absolute value of the gravitational acceleration within the first time threshold is greater than the second threshold, no operation is performed.
Optionally, the three-emergency detection is performed according to the calculation result, including:
if the calculation result meets the three-emergency event detection condition, judging that the current event is a three-emergency event;
if the calculation result part meets the three-emergency-event detection condition, judging that the current event needs to be subjected to the complement detection.
Optionally, if the calculation result meets the three emergency event detection condition, determining that the current event is a three emergency event includes:
if the front and rear acceleration, the duration time, the acceleration and the rotation angle in the calculation result meet the rapid acceleration detection conditions, judging that the current event is a rapid acceleration event;
or,
if the front-back acceleration, the duration time, the deceleration and the rotation angle meet the rapid deceleration detection conditions, the current event is determined to be a rapid deceleration event,
or,
and when the left and right acceleration, the duration, the speed and the rotation angle reach the threshold value of the tight turning condition, judging that the current event is a tight turning event.
Optionally, if the calculation result part meets the three-emergency event detection condition, after determining that the current event needs to be subjected to the complement detection, the method further includes:
acquiring a satellite positioning speed change value in a second time threshold, and judging that the satellite positioning speed change value is a sudden acceleration event currently if the satellite positioning speed change value meets a preset sudden acceleration requirement;
or,
and acquiring a satellite positioning speed change value in the second time threshold, and judging that the satellite positioning speed change value is a rapid deceleration event currently if the satellite positioning speed change value meets a preset rapid deceleration requirement.
A second aspect of an embodiment of the present invention provides a system for detecting a three urgent event, the system including: a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program when executed by the processor implementing the steps of:
calibrating a dynamic calibration value in advance;
obtaining a calibration result, and calculating the dynamic acceleration and the dynamic angle according to the calibration result;
detecting three emergency events according to the calculation result;
if the current event is a three-urgent event, acquiring image data of the three-urgent event, and reporting the acquired image data to a background server.
Optionally, the computer program when executed by the processor further implements the steps of:
acquiring gravitational acceleration through a gravitational sensor;
if the absolute value of the gravitational acceleration within the first time threshold is less than the first threshold; calculating the average value of the triaxial acceleration and the total acceleration in the first time threshold, and determining the front-back axial and the left-right axial to finish the initial calibration of the dynamic calibration value;
if the initial calibration is finished and the absolute value of the gravity acceleration in the first time threshold is smaller than the second threshold, updating the calibration value by the average value of the triaxial acceleration and the total acceleration in the first time threshold, determining the front-rear axis and the left-right axis, and finishing the updating calibration of the dynamic calibration value; if the absolute value of the gravitational acceleration within the first time threshold is greater than the second threshold, no operation is performed.
Optionally, the computer program when executed by the processor further implements the steps of:
if the calculation result meets the three-emergency event detection condition, judging that the current event is a three-emergency event;
if the calculation result part meets the three-emergency-event detection condition, judging that the current event needs to be subjected to the complement detection.
Optionally, the computer program when executed by the processor further implements the steps of:
if the front and rear acceleration, the duration time, the acceleration and the rotation angle in the calculation result meet the rapid acceleration detection conditions, judging that the current event is a rapid acceleration event;
or,
if the front-back acceleration, the duration time, the deceleration and the rotation angle meet the rapid deceleration detection conditions, the current event is determined to be a rapid deceleration event,
or,
and when the left and right acceleration, the duration, the speed and the rotation angle reach the threshold value of the tight turning condition, judging that the current event is a tight turning event.
A third aspect of the embodiments of the present invention provides a non-volatile computer-readable storage medium, where the non-volatile computer-readable storage medium stores computer-executable instructions that, when executed by one or more processors, cause the one or more processors to perform the method for detecting a three-emergency event described above.
In the technical scheme provided by the embodiment of the invention, the dynamic calibration value is calibrated in advance; obtaining a calibration result, and calculating the dynamic acceleration and the dynamic angle according to the calibration result; detecting three emergency events according to the calculation result; if the current event is a three-urgent event, acquiring image data of the three-urgent event, and reporting the acquired image data to a background server. According to the embodiment of the invention, the calibration value is dynamically calibrated, so that three emergency false alarms formed by rapid acceleration, rapid deceleration and rapid soft bending caused by calibration are reduced, and after the occurrence of three emergency events, the image acquisition is carried out on an event site, thereby providing convenience for post-query.
Drawings
FIG. 1 is a flow chart of an embodiment of a method for detecting a three urgent event according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a functional module of an embodiment of a method for detecting a three-emergency event according to an embodiment of the present invention;
FIG. 3a is a schematic diagram illustrating a coordinate axis of an X-axis of an embodiment of a method for detecting a three-emergency event according to an embodiment of the present invention;
FIG. 3b is a schematic diagram illustrating a Y-axis of an embodiment of a method for detecting a three-urgent event according to an embodiment of the present invention;
FIG. 4a is a schematic diagram illustrating a calculation of a slip angle with an X-axis in a forward and backward direction according to an embodiment of a method for detecting a three-emergency event;
FIG. 4b is a schematic diagram illustrating a Y-axis forward/backward side deviation angle calculation of an embodiment of a method for detecting a three-emergency event according to the present invention;
FIG. 5 is a schematic diagram showing the classification and threshold correspondence of a three urgent event according to an embodiment of a method for detecting a three urgent event according to the present invention;
fig. 6 is a schematic hardware structure diagram of another embodiment of a system for detecting a three-emergency event according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a flowchart illustrating an embodiment of a method for detecting a three-urgent event according to an embodiment of the invention. As shown in fig. 1, includes:
step S100, calibrating a dynamic calibration value in advance;
step 200, obtaining a calibration result, and calculating the dynamic acceleration and the dynamic angle according to the calibration result;
step S300, detecting three emergency events according to the calculation result;
and step 400, if the current event is a three-emergency event, acquiring image data of the three-emergency event, and reporting the acquired image data to a background server.
In specific implementation, the method for detecting the three emergency events is applied to automobiles, and the automobile-mounted equipment of the automobiles can be used for driving behaviors and is provided with data of a G-sensor (three-axis acceleration sensor), a camera and a satellite positioning module, and the data has various purposes. The G-sensor can collect the current acceleration, angle and the like of the vehicle body, and realize the dynamic calibration of a calibration value through an effective algorithm, so that the false alarm of three emergency caused by calibration can be effectively solved; the satellite positioning module may provide real-time speed, position, etc. of the current vehicle. By using the satellite positioning speed as a three-emergency auxiliary detection means, false alarms can be further reduced. And the video and picture capabilities provided by the camera are further combined, so that the event occurrence site is saved when the event occurs, and the event occurrence site can be used as evidence of post-query.
As shown in fig. 2, the present invention is divided into two subsystems, an event detection subsystem and an event processing subsystem, respectively. The event detection subsystem is mainly responsible for static and dynamic calibration value calibration, dynamic acceleration value calculation, dynamic angle calculation, detection and callback of a three-urgent event and detection and callback of a supplement event; the event processing subsystem is mainly responsible for sensor data acquisition, reporting after an event occurs, multimedia data packaging and reporting when the event occurs and local caching.
The sensor is responsible for collecting G-sensor (triaxial acceleration data) and satellite positioning real-time speed and transmitting the data into the front end, namely the event detection subsystem, according to a set interval.
When an event occurs, reporting the event to a background in time according to a designated protocol, collecting pictures and video data when the event occurs according to service requirements, and locally storing the pictures and the video data. And packaging the pictures and the video files when the event occurs, transmitting the packaged pictures and the video files to the cloud, transmitting the cloud back to the URL information to the background, and deleting the local corresponding files. And the local buffer memory is responsible for event report and failure of event video and picture report for subsequent supplementary transmission.
As shown in fig. 3a and 3b, the X-axis is forward and backward: front-back dynamic acceleration=x-axis acceleration difference cosa+z-axis acceleration difference sinA; left-right dynamic acceleration=y-axis acceleration difference.
The Y axis is the forward and backward direction: front-back dynamic acceleration=y-axis acceleration difference cosa+z-axis acceleration difference sinA; left-right dynamic acceleration=x-axis acceleration difference.
As can be seen from fig. 4a and 4b, it can be seen from fig. 3:
the X axis is the forward and backward direction: slip angle = asin (ay/aTal) 90;
the Y axis is the forward and backward direction: slip angle = asin (ax/aTal) 90;
wherein ax, ay, aal are the x-axis, y-axis, triaxial total acceleration values, respectively.
Further, calibrating the dynamic calibration value in advance includes:
acquiring gravitational acceleration through a gravitational sensor;
if the absolute value of the gravitational acceleration within the first time threshold is less than the first threshold; calculating the average value of the triaxial acceleration and the total acceleration in the first time threshold, and determining the front-back axis and the left-right axis to finish the initial calibration of the calibration value;
if the initial calibration is finished and the absolute value of the gravity acceleration in the first time threshold is smaller than the second threshold, updating the calibration value by the average value of the triaxial acceleration and the total acceleration in the first time threshold, determining the front-rear axis and the left-right axis, and finishing the updating calibration of the calibration value; if the absolute value of the gravitational acceleration within the first time threshold is greater than the second threshold, no operation is performed.
Specifically, the first threshold value is 0.5m/s 2 The second threshold value is 0.3m/s 2 For example, if the first time threshold is 10s, the acceleration value within 10s is positive and negative 0.5m/s during initial calibration 2 Calculating the average value of triaxial acceleration and total acceleration in 10s and taking the average value as an initial calibration value, calculating an included angle A between an X axis and a Z axis, and calculating corresponding sinA and cosA values; determining a front-back direction shaft, a left-right direction shaft according to the acceleration values of the X-axis and the Y-axis;
if the initial calibration is completed and the acceleration value within the last 10 seconds is plus or minus 0.3m/s 2 Dynamically updating the calibration value according to the average value of the triaxial acceleration and the total acceleration in 10 seconds, calculating an included angle A between the X axis and the Z axis, and calculating corresponding sinA and cosA values; and determining the front-back direction and the left-right direction according to the acceleration values of the X axis and the Y axis. If the initial calibration is completed and the acceleration value within the last 10 seconds is not positive or negative 0.3m/s 2 In that case, no operation is performed.
Further, the three-emergency detection according to the calculation result includes:
if the calculation result meets the three-emergency event detection condition, judging that the current event is a three-emergency event;
if the calculation result part meets the three-emergency-event detection condition, judging that the current event needs to be subjected to the complement detection.
When the method is implemented, if the calculation result meets the three-emergency event detection condition, judging that the current event is a three-emergency event;
when the acceleration and the duration reach the threshold value and the acceleration does not reach the threshold value, a supplementary transmission mark is arranged, and the supplementary report detection and callback module detects the supplementary report; and when the acceleration and the duration reach the threshold value and the deceleration does not reach the threshold value, the supplement transmission mark is arranged, and the supplement detection and callback module detects and supplements.
Further, if the calculation result meets the three emergency event detection condition, determining that the current event is a three emergency event includes:
if the front and rear acceleration, the duration time, the acceleration and the rotation angle in the calculation result meet the rapid acceleration detection conditions, judging that the current event is a rapid acceleration event;
or,
if the front-back acceleration, the duration time, the deceleration and the rotation angle meet the rapid deceleration detection conditions, the current event is determined to be a rapid deceleration event,
or,
and when the left and right acceleration, the duration, the speed and the rotation angle reach the threshold value of the tight turning condition, judging that the current event is a tight turning event.
In the specific implementation, the grading and threshold value table of the sudden acceleration, the sudden deceleration and the sudden turning is shown in fig. 5, and when the front and rear acceleration, the duration time, the acceleration and the rotation angle reach the threshold values, the sudden acceleration event is judged and the rear end is called back for processing at the same time;
when the front and back acceleration, duration time, deceleration and rotation angle reach threshold values, judging an emergency deceleration event and simultaneously calling back the rear end for processing;
and when the left and right acceleration, the duration time, the speed and the rotation angle reach the threshold values, determining a sharp turning event and simultaneously calling back the rear end for processing.
Further, if the calculation result part meets the three-emergency detection condition, after determining that the current event needs to be subjected to the complement detection, the method further includes:
acquiring a satellite positioning speed change value in a second time threshold, and judging that the satellite positioning speed change value is a sudden acceleration event currently if the satellite positioning speed change value meets a preset sudden acceleration requirement;
or,
and acquiring a satellite positioning speed change value in the second time threshold, and judging that the satellite positioning speed change value is a rapid deceleration event currently if the satellite positioning speed change value meets a preset rapid deceleration requirement.
In specific implementation, taking the second time threshold value as 3s as an example, the detection of the emergency acceleration and the emergency deceleration requiring the report detection is generally carried out within the 3s effective period, if the satellite positioning speed change value meets the relative emergency adding and subtracting requirements (see fig. 5), the satellite positioning speed change value is considered as an effective event and the satellite positioning speed change value is returned to the rear end for processing.
In some other embodiments, the satellite positioning speed is exchanged for the real vehicle speed. This may enable the algorithm to remain valid in the event of satellite positioning failure.
According to the embodiment of the invention, static and dynamic calibration value calibration can be automatically carried out according to the triaxial acceleration value;
the satellite positioning sensor is combined, the satellite positioning speed is added to the event effective judgment, and a large number of invalid events can be stopped;
the invention creatively solves the problem of event missing report under the condition that the delay of the satellite speed is delayed and the 3s missing detection is delayed.
It should be noted that, there is not necessarily a certain sequence between the steps, and those skilled in the art will understand that, in different embodiments, the steps may be performed in different orders, that is, may be performed in parallel, may be performed interchangeably, or the like.
The method for detecting a three-urgent event in the embodiment of the present invention is described above, and the system for detecting a three-urgent event in the embodiment of the present invention is described below, referring to fig. 6, fig. 6 is a schematic hardware structure of another embodiment of a system for detecting a three-urgent event in the embodiment of the present invention, as shown in fig. 6, the system 10 includes: memory 101, processor 102, and a computer program stored on the memory and executable on the processor, which when executed by processor 101, performs the steps of:
calibrating a dynamic calibration value in advance;
obtaining a calibration result, and calculating the dynamic acceleration and the dynamic angle according to the calibration result;
detecting three emergency events according to the calculation result;
if the current event is a three-urgent event, acquiring image data of the three-urgent event, and reporting the acquired image data to a background server.
Specific implementation steps are the same as those of the method embodiment, and are not repeated here.
Optionally, the computer program when executed by the processor 101 also implements the steps of:
acquiring gravitational acceleration through a gravitational sensor;
if the absolute value of the gravitational acceleration within the first time threshold is less than the first threshold; calculating the average value of the triaxial acceleration and the total acceleration in the first time threshold, and determining the front-back axial and the left-right axial to finish the initial calibration of the dynamic calibration value;
if the initial calibration is finished and the absolute value of the gravity acceleration in the first time threshold is smaller than the second threshold, updating the calibration value by the average value of the triaxial acceleration and the total acceleration in the first time threshold, determining the front-rear axis and the left-right axis, and finishing the updating calibration of the dynamic calibration value; if the absolute value of the gravitational acceleration within the first time threshold is greater than the second threshold, no operation is performed.
Specific implementation steps are the same as those of the method embodiment, and are not repeated here.
Optionally, the computer program when executed by the processor 101 also implements the steps of:
if the calculation result meets the three-emergency event detection condition, judging that the current event is a three-emergency event;
if the calculation result part meets the three-emergency-event detection condition, judging that the current event needs to be subjected to the complement detection.
Specific implementation steps are the same as those of the method embodiment, and are not repeated here.
Optionally, the computer program when executed by the processor 101 also implements the steps of:
if the front and rear acceleration, the duration time, the acceleration and the rotation angle in the calculation result meet the rapid acceleration detection conditions, judging that the current event is a rapid acceleration event;
or,
if the front-back acceleration, the duration time, the deceleration and the rotation angle meet the rapid deceleration detection conditions, the current event is determined to be a rapid deceleration event,
or,
and when the left and right acceleration, the duration, the speed and the rotation angle reach the threshold value of the tight turning condition, judging that the current event is a tight turning event.
Specific implementation steps are the same as those of the method embodiment, and are not repeated here.
Optionally, the computer program when executed by the processor 101 also implements the steps of:
acquiring a satellite positioning speed change value in a second time threshold, and judging that the satellite positioning speed change value is a sudden acceleration event currently if the satellite positioning speed change value meets a preset sudden acceleration requirement;
or,
and acquiring a satellite positioning speed change value in the second time threshold, and judging that the satellite positioning speed change value is a rapid deceleration event currently if the satellite positioning speed change value meets a preset rapid deceleration requirement.
Specific implementation steps are the same as those of the method embodiment, and are not repeated here.
Embodiments of the present invention provide a non-transitory computer-readable storage medium storing computer-executable instructions for execution by one or more processors, e.g., to perform the method steps S100-S400 of fig. 1 described above.
By way of example, nonvolatile storage media can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically erasable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, RAM may be available in many forms such as Synchronous RAM (SRAM), dynamic RAM, (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The disclosed memory components or memories of the operating environment described in embodiments of the present invention are intended to comprise one or more of these and/or any other suitable types of memory.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A method for detecting a three-emergency event, comprising:
calibrating a dynamic calibration value in advance;
obtaining a calibration result, and calculating the dynamic acceleration and the dynamic angle according to the calibration result;
detecting three emergency events according to the calculation result;
if the current event is a three-urgent event, acquiring image data of the three-urgent event, and reporting the acquired image data to a background server;
the pre-calibrating the dynamic calibration value comprises the following steps:
acquiring gravitational acceleration through a gravitational sensor;
if the absolute value of the gravitational acceleration within the first time threshold is less than the first threshold; calculating the average value of the triaxial acceleration and the total acceleration in the first time threshold, and determining the front-back axial and the left-right axial to finish the initial calibration of the dynamic calibration value;
if the initial calibration is finished and the absolute value of the gravity acceleration in the first time threshold is smaller than the second threshold, updating the calibration value by the average value of the triaxial acceleration and the total acceleration in the first time threshold, determining the front-rear axis and the left-right axis, and finishing the updating calibration of the dynamic calibration value; if the absolute value of the gravitational acceleration within the first time threshold is greater than the second threshold, no operation is performed.
2. The method for detecting a triple emergency event according to claim 1, wherein the step of detecting the triple emergency event according to the calculation result comprises:
if the calculation result meets the three-emergency event detection condition, judging that the current event is a three-emergency event;
if the calculation result part meets the three-emergency-event detection condition, judging that the current event needs to be subjected to the complement detection.
3. The method for detecting a triple emergency event according to claim 2, wherein if the calculation result satisfies a triple emergency event detection condition, determining that the current event is a triple emergency event comprises:
if the front and rear acceleration, the duration time, the acceleration and the rotation angle in the calculation result meet the rapid acceleration detection conditions, judging that the current event is a rapid acceleration event;
or,
if the front-back acceleration, the duration time, the deceleration and the rotation angle meet the rapid deceleration detection conditions, the current event is determined to be a rapid deceleration event,
or,
and when the left and right acceleration, the duration, the speed and the rotation angle reach the threshold value of the tight turning condition, judging that the current event is a tight turning event.
4. The method for detecting a three emergency event according to claim 2, wherein if the calculation result portion meets the three emergency event detection condition, after determining that the current event needs to be subjected to the post-report detection, further comprising:
acquiring a satellite positioning speed change value in a second time threshold, and judging that the satellite positioning speed change value is a sudden acceleration event currently if the satellite positioning speed change value meets a preset sudden acceleration requirement;
or,
and acquiring a satellite positioning speed change value in the second time threshold, and judging that the satellite positioning speed change value is a rapid deceleration event currently if the satellite positioning speed change value meets a preset rapid deceleration requirement.
5. A system for detecting a three-emergency event, the system comprising: a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program when executed by the processor implementing the steps of:
calibrating a dynamic calibration value in advance;
obtaining a calibration result, and calculating the dynamic acceleration and the dynamic angle according to the calibration result;
detecting three emergency events according to the calculation result;
if the current event is a three-urgent event, acquiring image data of the three-urgent event, and reporting the acquired image data to a background server;
the computer program when executed by the processor further performs the steps of:
acquiring gravitational acceleration through a gravitational sensor;
if the absolute value of the gravitational acceleration within the first time threshold is less than the first threshold; calculating the average value of the triaxial acceleration and the total acceleration in the first time threshold, and determining the front-back axial and the left-right axial to finish the initial calibration of the dynamic calibration value;
if the initial calibration is finished and the absolute value of the gravity acceleration in the first time threshold is smaller than the second threshold, updating the calibration value by the average value of the triaxial acceleration and the total acceleration in the first time threshold, determining the front-rear axis and the left-right axis, and finishing the updating calibration of the dynamic calibration value; if the absolute value of the gravitational acceleration within the first time threshold is greater than the second threshold, no operation is performed.
6. The system for detecting a triple emergency event according to claim 5, wherein the computer program when executed by the processor further performs the steps of:
if the calculation result meets the three-emergency event detection condition, judging that the current event is a three-emergency event;
if the calculation result part meets the three-emergency-event detection condition, judging that the current event needs to be subjected to the complement detection.
7. The system for detecting a triple emergency event according to claim 6, wherein the computer program when executed by the processor further performs the steps of:
if the front and rear acceleration, the duration time, the acceleration and the rotation angle in the calculation result meet the rapid acceleration detection conditions, judging that the current event is a rapid acceleration event;
or,
if the front-back acceleration, the duration time, the deceleration and the rotation angle meet the rapid deceleration detection conditions, the current event is determined to be a rapid deceleration event,
or,
and when the left and right acceleration, the duration, the speed and the rotation angle reach the threshold value of the tight turning condition, judging that the current event is a tight turning event.
8. A non-transitory computer-readable storage medium storing computer-executable instructions which, when executed by one or more processors, cause the one or more processors to perform the method of detecting a tri-acute event of any of claims 1-4.
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