CN111932236A - NB-IoT-based vehicle insurance duration charging device and reliability processing method - Google Patents
NB-IoT-based vehicle insurance duration charging device and reliability processing method Download PDFInfo
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Abstract
The invention discloses an NB-IoT (NB-IoT) -based vehicle insurance time charging device and a reliability processing method, wherein the NB-IoT-based vehicle insurance time charging device comprises an MCU, a power module, a communication module, a GNSS (global navigation satellite system) satellite positioning module and a vibration detection module, wherein the power module is connected with the MCU and is used for providing electric energy for the vehicle insurance time charging device, the communication module is used for providing the vehicle insurance time charging device to communicate with the outside, the GNSS satellite positioning module is used for marking the start-stop time of an engine and resolving the position of a vehicle, and the communication module is used for reporting the driving time, the position and the time of the vehicle to a vehicle. The invention carries out thinning, packaging and reporting on the data, does not increase the reported data volume under the condition of ensuring the relative integrity of the track, and improves the success rate of data reporting. The invention can also ensure that the data acquired and processed by the insurance positioning terminal is reliably transmitted to the platform, ensure that the start-stop time reported by the terminal and the vehicle running track can be matched with the real vehicle running time and track, and ensure the development of vehicle insurance services.
Description
Technical Field
The invention relates to a reliability processing method of a vehicle insurance charging mode based on vehicle running time.
Background
At present, in the vehicle insurance industry, besides the traditional insurance premium approval according to the vehicle type, the vehicle purchasing age and the number of times of insurance, an innovative insurance premium approval method according to the driving behavior of a driver and the vehicle running time is also provided, wherein the method for approving the insurance premium based on the vehicle running time provides a personalized insurance premium purchasing method for a vehicle owner, and achieves the purposes of long driving time, more paid insurance premiums, short driving time and less paid insurance premiums, the statistics of the vehicle use time is usually calculated by detecting and recording the ignition and flameout time of an engine, in addition, the running track of the vehicle is also the basis of insurance charging, after the vehicle running time and the running track are obtained, corresponding data are transmitted to an insurance platform through a network for calculating insurance, so that the starting and stopping time and the running track of the engine are reliably obtained, and the processing and reporting are the basis of insurance company for carrying out the insurance premium calculation according to the vehicle running time, in addition, the 2G and 3G networks in China face network quit, and the problems of data transmission rate and accuracy are increasingly highlighted.
The invention patent with the patent application number of CN201811532407.3 discloses a driving recorder, a vehicle insurance claim settlement method and a vehicle insurance claim settlement service system, wherein the driving data of a vehicle is recorded by the driving recorder, but the document mainly provides a basis for determining the damage of the vehicle damage, and a method for determining the charging of the vehicle insurance according to the driving time is not provided.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to realize the problems of accurate charging and reliability of the vehicle insurance duration under the novel network, the NB-IoT-based vehicle insurance duration charging device and the reliability processing method are provided.
In order to solve the technical problems, the invention adopts the following technical scheme:
an NB-IoT-based vehicle insurance duration charging device is characterized in that: the vehicle insurance platform comprises an MCU, a power module connected with the MCU, a communication module, a GNSS satellite positioning module and a vibration detection module, wherein the power module provides electric energy for a vehicle insurance time charging device, the communication module provides communication work between the vehicle insurance time charging device and the outside, the GNSS satellite positioning module marks the start-stop time of an engine and solves the position of a vehicle, and the communication module reports the running time, the position and the time of the vehicle to the vehicle insurance platform through an NB-IoT network.
The power supply module comprises a power supply, a charging management module and a power supply conversion module, wherein the power supply adopts an external power supply or a storage battery.
The power conversion module is an LDO power conversion chip; the storage battery is a rechargeable lithium battery.
The communication module comprises an NB-IOT communication module, an SIM card module, an antenna module and a USB interface module, wherein the NB-IOT communication module is integrated with the MCU; the antenna module comprises a satellite signal receiving antenna and an NB-IoT data communication antenna, wherein the satellite signal receiving antenna adopts a ceramic dielectric antenna, and the NB-IoT data communication antenna adopts an FPC antenna.
The vibration detection module is a high-sensitivity acceleration sensor.
A reliability processing method for charging time length of car insurance based on NB-IoT comprises an engine time acquisition unit, a data processing unit and a data reporting unit, wherein the engine time acquisition unit processes the vehicle running time acquired by a GNSS positioning module and the engine start-stop time acquired by a USB interface module to ensure the reliable acquisition of the engine start-stop time; the data acquisition unit is responsible for acquiring the driving time, the position and the engine start-stop time of the vehicle according to the road characteristics, and uploading the acquired positions to the vehicle insurance platform through the NB-IoT network; the data processing unit compresses and calculates the running time, position and engine start-stop time of the vehicle in a differential mode; and the data reporting unit processes the data in a thinning and merging mode and reports and sends the processed data.
The engine time acquisition unit ensures reliable acquisition of the start-stop time of the engine, and the realization method comprises the following steps:
step a: when the engine is started, comparing the UTC time of the GNSS satellite positioning module with the local RTC time, and when the time difference between the UTC time and the local RTC time is greater than a threshold value T and is the first comparison after the local terminal is electrified, synchronizing the UTC time of the GNSS satellite positioning module with the RTC time after T1 time; when the time difference between the two is greater than the threshold value T and the non-terminal is compared for the first time after being electrified, after T2 time, the GNSS satellite positioning time and the RTC time are adopted for synchronization, and the mentioned T2 time is greater than T1 time;
step b: marking the starting and stopping time of the engine by adopting an RTC (real time clock), and recording the current time of the RTC as corresponding starting and stopping time if the RTC time is synchronous;
step c: if the RTC time is not synchronous, timing the starting and stopping time of the engine by using a terminal timer, and subtracting the time from the starting and stopping time of the engine to the RTC synchronous time from the time of the RTC synchronous time to obtain the starting and stopping time when the UTC time of the GNSS satellite positioning module is available and is synchronous with the local RTC;
step d: after the engine start-stop time is obtained, the start-stop time is reported through an NB-IoT network, if the network is unavailable or uploading fails, the start-stop time is locally stored, and when the network returns to be normal, the start-stop time is reported again.
The data acquisition unit adopts a position acquisition method based on road characteristic identification, and the acquisition method has the following strategies:
step 1: when the vehicle is in a static state, after the position is collected for 1 time, stopping position collection;
step 2: when the vehicle is in a motion state and the vehicle is in a linear motion state, carrying out position acquisition once every R seconds;
and step 3: when the vehicle is in a moving state and in an arc motion state, position acquisition is carried out at intervals of M seconds, wherein the time interval M is smaller than the time interval R, namely the acquisition interval is large when the vehicle moves linearly, and the acquisition interval is small when the vehicle moves in an arc;
and 4, step 4: when the vehicle is in a moving state and the vehicle turns, acquiring the position of a turning point;
and 5: whether the vehicle is in a motion state or a static state can be judged through the speed output by the GNSS satellite positioning module;
step 6: the vehicle is in a straight line, an arc line or a turning motion state, and can be judged through the driving direction angle output by the GNSS satellite positioning module.
The data processing unit compresses the collected vehicle running time and position data, collects the latitude, longitude and corresponding time of the vehicle according to time sequence, compresses the original data by adopting a difference method, marks the first value of each data sequence as a reference value, performs difference calculation on other time data in the data sequences by adopting the reference value, frames the reference value and the difference value to report the data so as to reduce the reported data quantity, and decompresses and restores the data by adding the difference value to the reference value after the data is reported to a vehicle insurance platform.
The data reporting unit reports and sends data by adopting a data thinning and merging mode, and the specific implementation process is as follows:
the method comprises the following steps: if the data reporting fails, the packet data and the next packet data are combined and framed and uploaded;
step two: let the data frame record of each normal framing be PnN =1,2,3 … N, where N is a frame number and N is a data frame number to be currently uploaded;
step three: if PN-1If the data frame is not successfully uploaded, then PNP pair before uploading data frameN-1And PNReframing is carried out, and the framed data packet is recorded as QN，QNIs from PN-1And PNDecimating the thinned combined frame;
step IV: if PN-2、PN-1If none of the uploads are successful, QNComprising PN-2 、PN-1 、PNData frame, QNIs from PN-2 、PN-1 、PNPN-1And PNDecimating the thinned combined frame;
step five: if containing PN-2 、PN-1 、PNCombined data packet Q ofNAnd if the uploading is still unsuccessful, the whole machine is reset hard.
The invention adopting the technical scheme has the following beneficial effects: the invention carries out thinning, packaging and reporting on the data, does not increase the reported data volume under the condition of ensuring the relative integrity of the track, and improves the success rate of data reporting. The invention can also ensure that the data acquired and processed by the insurance positioning terminal is reliably transmitted to the platform, ensure that the start-stop time reported by the terminal and the vehicle running track can be matched with the real vehicle running time and track, and ensure the development of vehicle insurance services.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic block diagram of a car insurance charging device.
FIG. 2 is a flow chart of a reliability handling method of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same technical meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and it should be further understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, devices, components, and/or combinations thereof.
In the present invention, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and mean either a fixed connection or an integrally connected or detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be determined according to specific situations by persons skilled in the relevant scientific or technical field, and are not to be construed as limiting the present invention.
As shown in figure 1, the invention discloses a vehicle insurance charging device based on NB-IoT, which comprises a shell, an MCU, a power module, a communication module, a GNSS satellite positioning module and a vibration detection module, wherein the MCU, the power module, the communication module, the GNSS satellite positioning module and the vibration detection module are arranged in the shell, the power module supplies electric energy to the whole vehicle insurance charging device, the communication module provides communication work between the vehicle insurance charging device and the outside (comprising a vehicle engine and a vehicle insurance platform), the GNSS satellite positioning module marks the start-stop time of the engine and solves the position of the vehicle, the vehicle driving time, the position and the time are reported to the vehicle insurance platform through the communication module, and the vehicle insurance platform calculates the insurance premium according to the reported data.
The power module includes a power supply, a charging management module and a power conversion module, where the power supply may adopt an external power supply, or may also adopt a storage battery, such as a lithium battery module, and the like, which is described in detail below.
1) Power supply conversion module
The low-power-consumption high-performance LDO power conversion chip is arranged in the car insurance charging device, 5VDC voltage input by the USB interface is converted into 3.3VDC and 1.8VDC voltage required by other chips and modules for power supply, and normal work of other devices is guaranteed.
2) Lithium battery module
The charging device for the vehicle insurance is internally provided with the rechargeable lithium battery, and the device is maintained to continue working under the condition that the USB external power supply is powered off, so that satellite positioning, data reporting and the like are carried out.
3) Charging management module
The charging management chip is arranged in the vehicle insurance charging device, the input end of the charging management chip is connected with the lithium battery module, the output end of the charging management chip is connected with the MCU, and the charging management module manages the charging process of the built-in lithium battery and realizes charging strategies such as constant voltage and trickle.
The communication module includes an NB-IOT communication module, a SIM card module, an antenna module, and a USB interface module, wherein the NB-IOT communication module may be integrated with the MCU, as described in detail below.
4) NB-IoT communication module and MCU
The car insurance charging device is internally provided with an NB-IoT communication module which can support network signals of a plurality of operators, the module supports a 3GPP RELEASE14 protocol standard, supports the device to upload local data to a car insurance charging platform through an NB-IoT network, and can also issue an instruction of the car insurance charging platform to the car insurance charging device through the NB-IoT network, thereby realizing the complete machine detection, control and data processing functions of the MCU.
5) SIM card module
An operator patch SIM card is arranged in the vehicle insurance charging device, and the SIM card is used for network side authentication during data communication;
6) antenna module
The vehicle insurance charging device is internally provided with a satellite signal receiving antenna and an NB-IoT data communication antenna, wherein the ceramic medium antenna is adopted as the former antenna, the FPC antenna is adopted as the latter antenna, and parameters such as antenna receiving and transmitting frequency bands, gains and the like meet the requirements of signal receiving and transmitting.
7) USB interface module
The automobile insurance charging device shell is made of ABC materials and has the dustproof and waterproof functions of IP65, the shell is connected with a USB interface cable, and the USB interface cable can be connected with a vehicle USB interface to detect whether an engine of a vehicle is ignited or flameout.
The state information of the vehicle is mainly realized by depending on a GNSS satellite positioning module, a vibration detection module and a USB interface module. The USB interface module is used for acquiring whether a vehicle engine is ignited or extinguished; the vibration detection module acquires whether the vehicle is static or moving; the GNSS satellite positioning module collects information such as the travel time, position, speed, travel track, and the like of the vehicle, as follows.
8) GNSS satellite positioning module
The vehicle insurance charging device is internally provided with a Beidou GPS dual-system positioning module which can simultaneously receive Beidou and GPS satellite signals and carry out high-precision combined positioning calculation, and information such as the position, the speed, the time, the direction angle and the like of a vehicle can be obtained through the module.
9) Vibration detection module
The car insurance charging device is internally provided with a high-sensitivity acceleration sensor which is used for detecting the motion state of the vehicle and judging whether the vehicle is in the motion state or the static state.
On the basis of the device, the invention also provides a method for reliably processing the car insurance duration charging based on the NB-IoT, which specifically comprises an engine time acquisition unit, a data processing unit and a data reporting unit, wherein the engine time acquisition unit processes the vehicle running time acquired by the GNSS positioning module and the engine start-stop time acquired by the USB interface module, so as to ensure the reliable acquisition of the engine start-stop time; the data acquisition unit is responsible for acquiring the position of data such as vehicle driving time, position, engine start-stop time and the like according to road characteristics, and uploading the acquired data to the vehicle insurance platform through an NB-IoT network; the data processing unit compresses data such as vehicle running time, position, engine start-stop time and the like, calculates difference and the like; and the data reporting unit processes the data in a thinning and merging mode and reports and sends the processed data. The specific process is as follows:
10) engine start-stop time acquisition unit
The engine start-stop time is obtained by detecting the power on-off state of the USB interface, when the engine is started, the USB power supply is powered on, when the engine is closed, the USB power supply is powered off, the engine start-stop time is marked by the UTC time output by the GNSS satellite positioning module, namely when the insurance positioning terminal detects that the USB interface power supply is powered on, the current UTC time is adopted as the engine start time; by detecting the power failure of the USB interface power supply, the current UTC time mark is adopted as the engine off time, but in the actual use process, as the GNSS positioning module is unavailable in starting output time, the vehicle can be shielded, the satellite time is unavailable, and the satellite fault can occur, so that the situation that the GNSS time is unavailable occurs, the invention adopts a time maintenance method combining the local RTC and the satellite time to ensure the reliable acquisition of the starting and stopping time of the engine, and the realization method comprises the following steps:
step a: when the engine is started, comparing the UTC time of the GNSS satellite positioning module with the local RTC time, and when the time difference between the UTC time and the local RTC time is greater than a threshold value T and is the first comparison after the local terminal is electrified, synchronizing the UTC time of the GNSS satellite positioning module with the RTC time after T1 time; when the time difference between the two is greater than the threshold T and the first comparison is performed after the non-terminal is powered on, the GNSS satellite positioning time and the RTC time are used for synchronization after T2 time, where the aforementioned T2 time is greater than T1 time.
Step b: and marking the starting and stopping time of the engine by adopting the RTC, and recording the current time of the RTC as the corresponding starting and stopping time if the RTC time is synchronous.
Step c: and if the RTC time is not synchronous, timing the starting and stopping time of the engine by using a terminal timer, and when the UTC time of the GNSS satellite positioning module is available and is synchronous with the local RTC, subtracting the time from the starting and stopping time of the engine to the RTC synchronous time by using the time from the RTC synchronous time to obtain the starting and stopping time.
Step d: after the engine start-stop time is obtained, the start-stop time is reported through an NB-IoT network, if the network is unavailable or uploading fails, the start-stop time is locally stored, and when the network returns to be normal, the start-stop time is reported again.
11) Data acquisition unit
The data acquisition unit is used for acquiring the position of a vehicle, and because an NB-IoT network is not suitable for reporting a data packet with larger bytes and a platform needs to really record the driving track of the vehicle, the invention adopts a position acquisition method based on road characteristic identification, and the acquisition method has the following strategies:
step 1: when the vehicle is in a static state, after the position is collected for 1 time, stopping position collection;
step 2: when the vehicle is in a motion state and the vehicle is in a linear motion state, carrying out position acquisition once every R seconds;
and step 3: when the vehicle is in motion state, and when the vehicle is in the motion state of arc line, carry out position collection once every interval M seconds, time interval M is less than time interval R, and when vehicle linear motion, the collection interval is big, and during the motion of arc line, the collection interval is little.
And 4, step 4: when the vehicle is in a moving state and the vehicle turns, acquiring the position of a turning point;
and 5: whether the vehicle is in a motion state or a static state can be judged through the speed output by the GNSS satellite positioning module;
step 6: the vehicle is in a straight line, an arc line or a turning motion state, and can be judged according to a driving direction angle output by the GNSS satellite positioning module;
the position acquisition is carried out through the steps, the complete track of the platform vehicle is ensured, the data reporting amount is reduced, and the success rate of data reporting is improved.
12) Data processing unit
In order to further reduce the number of bytes of data reporting and improve the success rate and reliability of data reporting, the invention compresses the collected vehicle running time and position data, a terminal collects the latitude and longitude of a vehicle and corresponding time according to a time sequence, a difference method is adopted to compress original data, a first value of each data sequence is marked as a reference value, other time data in the data sequences are subjected to difference calculation with the reference value, the reference value and the difference value are framed to report the data so as to reduce the reported data quantity, and after the data are reported to a platform, decompression and recovery of the data are carried out in a mode of adding the difference value to the reference value.
13) Data reporting unit
The invention discloses a method for reporting data by a terminal through an NB-IoT network, which comprises the following steps that (1) the terminal reports the data through the NB-IoT network, based on the characteristics of the NB-IoT network, the method adopts a mode of m-second collection and n-minute reporting, in the actual operation process, due to the network coverage factor of a base station distribution network, the phenomenon that the data cannot be reported successfully often occurs, under the condition, the method for caching the reported data and combining and reporting the data with the next data is often adopted in the industry for processing, but the data packet is enlarged, and the data reporting failure rate is increased, the method adopts a data rarefaction and combination mode to report the data, and the specific implementation process is as follows:
the method comprises the following steps: if the data reporting fails, the packet data and the next packet data are combined and framed to be uploaded.
Step two: let the data frame record of each normal framing be PnN =1,2,3 … N. Wherein N is the frame number, and N is the data frame number to be uploaded currently.
Step three: if PN-1If the data frame is not successfully uploaded, then PNOn the data frameFront transmission pair PN-1And PNReframing is carried out, and the framed data packet is recorded as QN，QNIs from PN-1And PNAnd (4) thinning out the combined frames.
Step IV: if PN-2、PN-1If none of the uploads are successful, QNComprising PN-2 、PN-1 、PNData frame, QNIs from PN-2 、PN-1、PNPN-1And PNAnd (4) thinning out the combined frames.
Step five: if containing PN-2 、PN-1 、PNCombined data packet Q ofNAnd if the uploading is still unsuccessful, the whole machine is reset hard.
By adopting the method to carry out data thinning, packaging and reporting, the reported data volume is not increased under the condition of ensuring the relative integrity of the track, and the success rate of data reporting is improved.
Through the steps, the data collected and processed by the insurance positioning terminal can be reliably transmitted to the platform, the start-stop time reported by the terminal and the vehicle running track can be ensured to be matched with the real running time and track of the vehicle, and the development of the vehicle insurance service is ensured.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (10)
1. An NB-IoT-based vehicle insurance duration charging device is characterized in that: the vehicle insurance platform comprises an MCU, a power module connected with the MCU, a communication module, a GNSS satellite positioning module and a vibration detection module, wherein the power module provides electric energy for a vehicle insurance time charging device, the communication module provides communication work between the vehicle insurance time charging device and the outside, the GNSS satellite positioning module marks the start-stop time of an engine and solves the position of a vehicle, and the communication module reports the running time, the position and the time of the vehicle to the vehicle insurance platform through an NB-IoT network.
2. The NB-IoT based car insurance duration charging apparatus as claimed in claim 1, wherein: the power supply module comprises a power supply, a charging management module and a power supply conversion module, wherein the power supply adopts an external power supply or a storage battery.
3. The NB-IoT based car insurance duration charging apparatus as claimed in claim 2, wherein: the power conversion module is an LDO power conversion chip; the storage battery is a rechargeable lithium battery.
4. The NB-IoT based car insurance duration charging apparatus as claimed in claim 1, wherein: the communication module comprises an NB-IOT communication module, an SIM card module, an antenna module and a USB interface module, wherein the NB-IOT communication module is integrated with the MCU; the antenna module comprises a satellite signal receiving antenna and an NB-IoT data communication antenna, wherein the satellite signal receiving antenna adopts a ceramic dielectric antenna, and the NB-IoT data communication antenna adopts an FPC antenna.
5. The NB-IoT based car insurance duration charging apparatus as claimed in claim 1, wherein: the vibration detection module is a high-sensitivity acceleration sensor.
6. A reliability processing method for charging duration of car insurance based on NB-IoT is characterized in that: the GNSS positioning system comprises an engine time acquisition unit, a data processing unit and a data reporting unit, wherein the engine time acquisition unit processes the vehicle running time acquired by the GNSS positioning module and the engine start-stop time acquired by the USB interface module, so that the reliable acquisition of the engine start-stop time is ensured; the data acquisition unit is responsible for acquiring the driving time, the position and the engine start-stop time of the vehicle according to the road characteristics, and uploading the acquired positions to the vehicle insurance platform through the NB-IoT network; the data processing unit compresses and calculates the running time, position and engine start-stop time of the vehicle in a differential mode; and the data reporting unit processes the data in a thinning and merging mode and reports and sends the processed data.
7. The NB-IoT based car insurance duration charging reliability processing method according to claim 6, characterized in that: the engine time acquisition unit ensures reliable acquisition of the start-stop time of the engine, and the realization method comprises the following steps:
step a: when the engine is started, comparing the UTC time of the GNSS satellite positioning module with the local RTC time, and when the time difference between the UTC time and the local RTC time is greater than a threshold value T and is the first comparison after the local terminal is electrified, synchronizing the UTC time of the GNSS satellite positioning module with the RTC time after T1 time; when the time difference between the two is greater than the threshold value T and the non-terminal is compared for the first time after being electrified, after T2 time, the GNSS satellite positioning time and the RTC time are adopted for synchronization, and the mentioned T2 time is greater than T1 time;
step b: marking the starting and stopping time of the engine by adopting an RTC (real time clock), and recording the current time of the RTC as corresponding starting and stopping time if the RTC time is synchronous;
step c: if the RTC time is not synchronous, timing the starting and stopping time of the engine by using a terminal timer, and subtracting the time from the starting and stopping time of the engine to the RTC synchronous time from the time of the RTC synchronous time to obtain the starting and stopping time when the UTC time of the GNSS satellite positioning module is available and is synchronous with the local RTC;
step d: after the engine start-stop time is obtained, the start-stop time is reported through an NB-IoT network, if the network is unavailable or uploading fails, the start-stop time is locally stored, and when the network returns to be normal, the start-stop time is reported again.
8. The NB-IoT based car insurance duration charging reliability processing method according to claim 6, characterized in that: the data acquisition unit adopts a position acquisition method based on road characteristic identification, and the acquisition method has the following strategies:
step 1: when the vehicle is in a static state, after the position is collected for 1 time, stopping position collection;
step 2: when the vehicle is in a motion state and the vehicle is in a linear motion state, carrying out position acquisition once every R seconds;
and step 3: when the vehicle is in a moving state and in an arc motion state, position acquisition is carried out at intervals of M seconds, wherein the time interval M is smaller than the time interval R, namely the acquisition interval is large when the vehicle moves linearly, and the acquisition interval is small when the vehicle moves in an arc;
and 4, step 4: when the vehicle is in a moving state and the vehicle turns, acquiring the position of a turning point;
and 5: whether the vehicle is in a motion state or a static state can be judged through the speed output by the GNSS satellite positioning module;
step 6: the vehicle is in a straight line, an arc line or a turning motion state, and can be judged through the driving direction angle output by the GNSS satellite positioning module.
9. The NB-IoT based car insurance duration charging reliability processing method according to claim 6, characterized in that: the data processing unit compresses the collected vehicle running time and position data, collects the latitude, longitude and corresponding time of the vehicle according to time sequence, compresses the original data by adopting a difference method, marks the first value of each data sequence as a reference value, performs difference calculation on other time data in the data sequences by adopting the reference value, frames the reference value and the difference value to report the data so as to reduce the reported data quantity, and decompresses and restores the data by adding the difference value to the reference value after the data is reported to a vehicle insurance platform.
10. The NB-IoT based car insurance duration charging reliability processing method according to claim 6, characterized in that: the data reporting unit reports and sends data by adopting a data thinning and merging mode, and the specific implementation process is as follows:
the method comprises the following steps: if the data reporting fails, the packet data and the next packet data are combined and framed and uploaded;
step two: let the data frame record of each normal framing be PnN =1,2,3 … N, where N is a frame number and N is a data frame number to be currently uploaded;
step three: if PN-1If the data frame is not successfully uploaded, then PNP pair before uploading data frameN-1And PNReframing is carried out, and the framed data packet is recorded as QN，QNIs from PN-1And PNDecimating the thinned combined frame;
step IV: if PN-2、PN-1If none of the uploads are successful, QNComprising PN-2 、PN-1 、PNData frame, QNIs from PN-2 、PN-1 、PNPN-1And PNDecimating the thinned combined frame;
step five: if containing PN-2 、PN-1 、PNCombined data packet Q ofNAnd if the uploading is still unsuccessful, the whole machine is reset hard.
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