CN105974443B - Installation testing method, server and the system of GPS terminal - Google Patents
Installation testing method, server and the system of GPS terminal Download PDFInfo
- Publication number
- CN105974443B CN105974443B CN201610292811.2A CN201610292811A CN105974443B CN 105974443 B CN105974443 B CN 105974443B CN 201610292811 A CN201610292811 A CN 201610292811A CN 105974443 B CN105974443 B CN 105974443B
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- voltage
- gps terminal
- state
- installation
- vehicle
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/23—Testing, monitoring, correcting or calibrating of receiver elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Abstract
The present invention discloses a kind of installation testing method of GPS terminal, includes the following steps：Server receives the vehicle voltage under the current state that GPS terminal uploads；The server sends the instruction for changing vehicle launch state；The server receives the vehicle voltage changed after starting state that the GPS terminal uploads；The server calculates the voltage difference of the vehicle voltage and the vehicle voltage after the change starting state under the current state, compares the voltage difference and predeterminated voltage threshold, judges whether the GPS terminal installation is normal.Installation test server and a kind of mounting test system of GPS terminal invention additionally discloses a kind of GPS terminal.The present invention judges the installation results with management and control GPS terminal by data algorithm, can reduce False Rate.
Description
Technical field
The present invention relates to remote control technology field more particularly to a kind of installation testing method of GPS terminal, server and
System.
Background technology
In the modern life, more and more vehicles are mounted with remote monitoring GPS terminal, and remote monitoring GPS terminal passes through reading
Pick-up supply voltage, can report low pressure early warning when battery voltage is too low.
, it is necessary to carry out patching operations to vehicle harness in the installation process of remote monitoring GPS terminal.Due to vehicle harness
It is more, often there is the situation of wiring error during wiring, therefore, after wiring, it is necessary to butted line result whether correctly into
Row judges.
A kind of solution method used at present is that GPS terminal installation personnel measures vehicle power supply voltage using universal meter, with
Whether butted line result correctly carries out artificial judgment.
The above method there are the drawbacks of be：Installation personnel level differs, can not accurate judgement wiring as a result, often resulting in long-range
The situation of monitoring GPS terminal connection mistake, after wiring error, remote monitoring GPS terminal can judge vehicle-state by accident to server,
Cause false alarm, false alarm can interfere user, and waste of manpower is needed to carry out wrong alert processing.
The content of the invention
The main object of the present invention is to provide a kind of installation testing method of GPS terminal, server and system, it is intended to pass through
Data algorithm judges the installation results with management and control GPS terminal, reduces False Rate.
In order to achieve the object, the installation testing method of the GPS terminal proposed by the present invention, includes the following steps：Clothes
The vehicle voltage being engaged under the current state that device reception GPS terminal uploads；The server sends the finger for changing vehicle launch state
Order；The GPS terminal uploads the vehicle voltage after changing starting state to the server；The server receives the GPS
The vehicle voltage changed after starting state that terminal uploads；The server calculates vehicle voltage and institute under the current state
The voltage difference of the vehicle voltage after changing starting state is stated, compares the voltage difference and predeterminated voltage threshold, described in judgement
Whether GPS terminal installation is normal.
Preferably, the current state is one kind in startup or flameout state, and the change starting state is to be switched to
The another kind of above two state；Vehicle voltage under the current state is for one group according to the multiple of setting time interval upload
Voltage value, it is described change starting state after vehicle voltage for another group according to setting time interval upload multiple voltage values；
The voltage difference be uploaded under maximum voltage value and flameout state under starting state in multiple voltage values for uploading it is multiple
The difference of minimum amount of voltage that in voltage value.
Preferably, the setting time interval is freely set by the GPS terminal or the server.
After judging whether the GPS terminal installation is normal, further include：If normal, the normal prompting of installation is sent.
Preferably, after judging whether the GPS terminal installation is normal, further include：If abnormal, carrying for installation exception is sent
Show.
Preferably, the installation normally prompts for appointing in text prompt, graphical cues, luminous prompting, auditory tone cues
It anticipates a kind of or arbitrary a variety of combination.
Preferably, what the installation was abnormal prompts for appointing in text prompt, graphical cues, luminous prompting, auditory tone cues
It anticipates a kind of or arbitrary a variety of combination.
Preferably, after sending after installation is normally prompted or sending the abnormal prompting of installation, further include：Form installation situation
Record.
The present invention also provides a kind of installation test server of GPS terminal, including：
Receiving module, after receiving the vehicle voltage under the current state of GPS terminal upload and changing starting state
Vehicle voltage；
Reminding module, for sending the instruction for changing vehicle launch state；
Judgment module calculates the vehicle voltage under the current state and the vehicle voltage after the change starting state
Voltage difference compares the voltage difference and predeterminated voltage threshold, judges whether the GPS terminal installation is normal.
The present invention also provides a kind of mounting test system of GPS terminal, including：
GPS terminal, for uploading the vehicle voltage under current state to server, and after vehicle launch state is changed on
The vehicle voltage after changing starting state is passed to the server；
APP terminals for the instruction for the change vehicle launch state for coming from the server to be presented, and are presented and come from
The server judges the whether normal result of the GPS terminal；
Server, after receiving the vehicle voltage under the current state of the GPS terminal upload and changing starting state
Vehicle voltage, send and change the instruction of vehicle launch state, calculate vehicle voltage and the change under the current state
The voltage difference of vehicle voltage after starting state compares the voltage difference and predeterminated voltage threshold and is tied according to comparison
Fruit judges whether the GPS terminal installation is normal.
In technical scheme, after server reads the vehicle voltage under current state and changes starting state respectively
Vehicle voltage, and the voltage difference both calculated, the method by comparing the voltage difference and predeterminated voltage threshold, judgement
Whether the GPS terminal installation is normal, if the voltage difference is in the range of the default predeterminated voltage threshold, judges
GPS terminal installation is normal, if the voltage difference is not at the default predeterminated voltage threshold scope, judge described in
GPS terminal installation is abnormal, judges the installation results with GPS terminal described in management and control by data algorithm, judging result is accurate, can
Effectively reduce False Rate.
Description of the drawings
It, below will be to embodiment or existing skill in order to illustrate more clearly of the present embodiment or technical solution of the prior art
Attached drawing is briefly described needed in art description, it should be apparent that, the accompanying drawings in the following description is only the present invention
Some embodiments, for those of ordinary skill in the art, without creative efforts, can also basis
Structure shown in these attached drawings obtains other attached drawings.
Fig. 1 is the flow diagram of the installation testing method first embodiment of GPS terminal in the present invention；
Fig. 2 is the flow diagram of the installation testing method second embodiment of GPS terminal in the present invention；
Fig. 3 is the hardware architecture diagram of the mounting test system of GPS terminal in the present invention.
Drawing reference numeral explanation：
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the present embodiment, the technical solution in the present embodiment is clearly and completely described,
Obviously, described embodiment is only the part of the embodiment of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, those of ordinary skill in the art's all other embodiments obtained without creative efforts,
Belong to the scope of protection of the invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used for solving in the present embodiment
Relative position relation, motion conditions under a certain particular pose (as shown in drawings) between each component etc. are released, if this is specific
When posture changes, then directionality instruction also correspondingly changes correspondingly.
In addition, in the present invention such as relating to the description of " first ", " second " etc. be only used for description purpose, and it is not intended that
Indicate or imply its relative importance or the implicit quantity for indicating indicated technical characteristic.Define as a result, " first ",
At least one this feature can be expressed or be implicitly included to the feature of " second ".In the description of the present invention, " multiple " contain
Justice is at least two, such as two, three etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " connection ", " fixation " etc. should be interpreted broadly,
For example, " fixation " can be fixedly connected or be detachably connected or integral；Can be mechanical connection or
Electrical connection；It can be directly connected, can also be indirectly connected by intermediary, can be the connection inside two elements or two
The interaction relationship of a element, unless otherwise restricted clearly.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of the term in the present invention.
In addition, the technical solution between each embodiment of the present invention can be combined with each other, but must be general with this field
Logical technical staff can be implemented as basis, will be understood that when the combination appearance of technical solution is conflicting or can not realize this
The combination of technical solution is not present, also not the present invention claims protection domain within.
The present invention proposes a kind of installation testing method of GPS terminal and applies the installation testing method of the GPS terminal
The mounting test system 1 of GPS terminal.
Fig. 1 is refer to, first embodiment of the invention proposes a kind of installation testing method of GPS terminal, the GPS terminal
Installation testing method includes the following steps：
S10, server receive the vehicle voltage under the current state that GPS terminal 20 uploads.
Before this step, it is necessary to confirm that the GPS terminal 20 has been completed to install, and the GPS terminal 20 is powered on,
After the power is turned on, the APP terminals 30 start to install the instruction of activation process, institute to the server 10 transmission the GPS terminal 20
State the installation test program that server 10 starts the GPS terminal.
S10 is referred specifically to, and the vehicle voltage under the current state is uploaded to the server by the GPS terminal 20
10, after the server 10 receives the vehicle voltage, the vehicle voltage data under the current state are stored.
The GPS terminal 20 is GPS terminal, and the vehicle voltage is the supply voltage of vehicle.
Vehicle is provided with storage battery, and after vehicle launch, engine gives storage battery to charge, since engine output voltage is than storage battery electricity
High 1-2V is pressed, so the supply voltage after engine start is higher 1-2V than the supply voltage after stopping working, in the present embodiment, passes through ratio
Compared with the supply voltage difference after starting and being flame-out, you can judge whether wiring is correct for the GPS terminal 20.
S20, the server 10 send the instruction for changing vehicle launch state.
Specifically, after the server 10 is successfully received the vehicle voltage under the current state, change vehicle is sent
The instruction of starting state after the instruction of the change vehicle-state is presented in the APP terminals 30, is reminded to the APP terminals 30
Operator switches the starting state of vehicle.The starting state of switching vehicle refers to, if being before starting state, is switched to flame-out
State；If being before flameout state, starting state is switched to.
S30, the server 10 receive the vehicle voltage after the change starting state that the GPS terminal 20 uploads.
Specifically, the server 10 receive it is described change starting state after vehicle voltage after, to it is described change start
Vehicle voltage after state is stored.
S40, the server 10 calculate the vehicle voltage under the current state and the vehicle after the change starting state
The voltage difference of voltage, compares the voltage difference and predeterminated voltage threshold, judges whether GPS terminal installation is normal.
Specifically, the server 10 carries out data operation, the vehicle voltage obtained under the current state changes with described
Becoming the voltage difference of the vehicle voltage after starting state, the server 10 compares the voltage difference and predeterminated voltage threshold,
Judge whether the GPS terminal installation is normal.
The predeterminated voltage threshold allows the maximum fluctuated for the voltage difference being manually set.
In order to which the installation results of the GPS terminal 20 are effectively presented, the server 10 will determine that result is transferred to institute
APP terminals 30 are stated, if the voltage difference is less than or equal to the predeterminated voltage threshold, judge that the GPS terminal 20 is installed
Normally, represent that 20 wiring of GPS terminal is correct, if the voltage difference be more than the predeterminated voltage threshold, judge described in
GPS terminal 20 installs exception, represents 20 wiring error of GPS terminal.
In technical scheme, the vehicle voltage that server 10 is calculated under the current state starts with described change
The voltage difference of vehicle voltage after state, the method by comparing the voltage difference and predeterminated voltage threshold, described in judgement
Normally whether GPS terminal 20 installed, if the voltage difference is in the range of the default predeterminated voltage threshold, judges institute
GPS terminal 20 is stated to install normally, if the voltage difference is not at the default predeterminated voltage threshold scope, judge described in
GPS terminal 20 installs exception, judges the installation results with GPS terminal described in management and control 20 by data algorithm, judging result is accurate
Really, False Rate is effectively reduced.
Preferably, the current state is one kind in startup or flameout state, and the change starting state is to be switched to
The another kind of above two state；Vehicle voltage under the current state is for one group according to the multiple of setting time interval upload
Voltage value, it is described change starting state after vehicle voltage for another group according to setting time interval upload multiple voltage values；
The voltage difference be uploaded under maximum voltage value and flameout state under starting state in multiple voltage values for uploading it is multiple
The difference of minimum amount of voltage that in voltage value.
Since engine output voltage is higher 1-2V than battery voltage, so after the supply voltage after engine start is than stopping working
The high 1-2V of supply voltage, therefore the maximum vehicle voltage is appeared under vehicle launch state, and the minimum vehicle electrical extrudes
Under present vehicle flameout state.
It is to judge the GPS terminal 20 with the difference of maximum vehicle voltage and minimum vehicle voltage using in the present embodiment
The no normal method of installation can more embody the fluctuation range of vehicle voltage, the wiring state of the GPS terminal 20 be judged more accurate
Really.
It is of course also possible to use the difference of the vehicle voltage average under vehicle voltage average and flameout state under starting state
To judge whether the GPS terminal 20 is installed normally.
The GPS terminal 20 uploads multiple vehicle voltages under two states respectively, and multi-group data is more advantageous to that vehicle is presented
The fluctuation of voltage.
Preferably, the setting time interval is freely set by the GPS terminal or the server.
The setting time interval can be adjusted according to the needs of operator, in order to measure multigroup vehicle in a short time
Voltage, operator can by shortening the setting time interval to shorten test and judge the time, convenient for improve test and
The efficiency of judgement.Certainly, the setting time interval can be arbitrary value, can meet the test of operator and judge needs i.e.
It can.
The setting time interval can also be set in the APP terminals 30.
With reference to Fig. 2, second embodiment of the invention proposes a kind of installation testing method of GPS terminal, real based on above-mentioned first
Apply example, judge the GPS terminal 20 install whether it is normal after, further include：
S50, if normally, sending the normal prompting of installation.
Preferably, judge the GPS terminal 20 install whether it is normal after, further include：
S60 if abnormal, sends the abnormal prompting of installation.
In order to which the installation results of the GPS terminal 20 are effectively presented, the server 10 will determine that result is transferred to institute
APP terminals 30 are stated, specifically, when the server 10 judges that the GPS terminal 20 installs normal or abnormal, it can be by described
APP terminals 30, which are sent, installs normal or abnormal prompting.
Preferably, the installation normally prompts for appointing in text prompt, graphical cues, luminous prompting, auditory tone cues
It anticipates a kind of or arbitrary a variety of combination.
Preferably, what the installation was abnormal prompts for appointing in text prompt, graphical cues, luminous prompting, auditory tone cues
It anticipates a kind of or arbitrary a variety of combination.
When the server 10 by the abnormal result of the abnormal result of the installation and the installation in the APP terminals 30
On show, the normal prompting of installation and the abnormal prompting of the installation can be text prompt, graphical cues, shine
Any one in prompting, auditory tone cues or arbitrary a variety of combination, prompting especially abnormal to the installation, can pass through knot
It closes voice or alarm sound strengthens prompting effect, operator is avoided to ignore the abnormal result of installation.
After operator receives the abnormal prompting of the installation, rewiring is carried out to the GPS terminal 20, to exclude to connect
Line failure, and above step is repeated, the installation results of the GPS terminal 20 are tested.
Preferably, after sending after installation is normally prompted or sending the abnormal prompting of installation, further include：
S70 forms installation situation record.
The server 10 forms wiring result each time and records, specifically, operator powers in the GPS terminal 20
Afterwards, personal login is carried out in the APP terminals 30, therefore, the installation results of the GPS terminal 20 and a of operator acknowledge a debt
Family is associated, and the server 20 automatically may be used also by record each installation results associated with personal account, the server 20
With by personal account, information of vehicles simultaneously associated with installation results, to record the installation success rate of each operator, convenient for pair
Operator carries out job rating, also allows for recording the installation situation of the GPS terminal 20 of each vehicle, convenient in the future
Tracking and retrospect.
In order to further improve the wiring efficiency of the GPS terminal 20, in of the invention, the connecting line of the GPS terminal 20
General 3 lines (just, power supply is born and ACC for power supply) are changed to 2 lines (power supply is just born with power supply), can effectively save the set-up time.
As shown in figure 3, the present invention also provides a kind of installation test server 10 of GPS terminal, including：
Receiving module 11, for receiving the vehicle voltage under the current state of the upload of GPS terminal 20 and changing starting state
Vehicle voltage afterwards；
Reminding module 12, for sending the instruction for changing vehicle launch state；
Judgment module 13 calculates the vehicle voltage under the current state and the vehicle voltage after the change starting state
Voltage difference, compare the voltage difference and predeterminated voltage threshold, judge whether the GPS terminal 20 is installed normal.
The receiving module 11 can be interface circuit etc., and the server 10 is received and stored under the current state
After vehicle voltage, the instruction for changing vehicle launch state is sent by the reminding module 12, the reminding module 12 can collect
Described in Cheng Yu on receiving module 11.
The judgment module 13 can be single-chip microcomputer integrated circuit, comprising analog-digital converter, logic circuit, microcontroller and
Microprocessor etc..
With reference to shown in Fig. 3, the present invention also provides a kind of mounting test system 1 of GPS terminal, including：
GPS terminal 20, for uploading the vehicle voltage under current state to server 10；And changing vehicle launch state
The vehicle voltage after changing starting state is uploaded afterwards to the server 10；
APP terminals 30 for the instruction for the change vehicle launch state for coming from the server 10 to be presented, and are presented and
Judge the whether normal result of the GPS terminal 20 from the server 10；
The server 10 starts shape for receiving the vehicle voltage under the current state of the upload of GPS terminal 20 and changing
Vehicle voltage after state, send change the instruction of vehicle launch state, calculate vehicle voltage under the current state with it is described
Change voltage difference, the comparison voltage difference and the predeterminated voltage threshold of the vehicle voltage after starting state and according to right
Judge whether the GPS terminal 20 is installed normal than result.
The APP terminals 30 are connected with 10 wireless telecommunications of server, the GPS terminal 20 and 10 nothing of server
Line communication connection.
The APP terminals 30 are connected with the server 10 by communication module (not shown), the GPS terminal 20
It is connected with the server 10 also by the communication module.
In the present embodiment, the APP terminals 30 connect with the GPS terminal 20 with 10 wireless telecommunications of server respectively
It connects, with the installation test result for uploading the vehicle voltage, the operational order and the GPS terminal 20 being presented.
The APP terminals 30 can be the arbitrary device with communication function and display function, in the present invention, described
APP terminals 30 are the APP terminals on mobile communication equipment, specifically, being the APP terminals on mobile phone, are had using simply, just
Victory, without separately setting the advantageous effects such as manipulation device.
The foregoing is merely the preferred embodiment of the present invention, are not intended to limit the scope of the invention, every at this
The equivalent structure transformation made under the inventive concept of invention using description of the invention and accompanying drawing content or directly/utilization indirectly
It is included in other related technical areas in the scope of patent protection of the present invention.
Claims (10)
1. a kind of installation testing method of GPS terminal, which is characterized in that the installation testing method of the GPS terminal includes as follows
Step：
Server receives the vehicle voltage under the current state that GPS terminal uploads, wherein, the current state is startup or flame-out
One kind in state；
The server sends the instruction for changing vehicle launch state, wherein, the change starting state is to be switched to above-mentioned two
The another kind of kind state；
The server receives the vehicle voltage changed after starting state that the GPS terminal uploads；
The server calculates the electricity of the vehicle voltage and the vehicle voltage after the change starting state under the current state
Pressure difference compares the voltage difference and predeterminated voltage threshold, judges whether the GPS terminal installation is normal.
2. the installation testing method of GPS terminal as described in claim 1, which is characterized in that the vehicle under the current state
Voltage is one group of multiple voltage value according to the upload of setting time interval, and the vehicle voltage after the change starting state is another
Multiple voltage values that group is uploaded according to setting time interval；The voltage difference is in the multiple voltage values uploaded under starting state
Maximum voltage value and flameout state under minimum amount of voltage that in multiple voltage values for uploading difference.
3. the installation testing method of GPS terminal as claimed in claim 2, which is characterized in that the setting time interval passes through
The GPS terminal or the server are freely set.
4. the installation testing method of the GPS terminal as described in any one in claims 1 to 3, which is characterized in that described in judgement
After whether GPS terminal installation is normal, further include：
If normal, the normal prompting of installation is sent.
5. the installation testing method of GPS terminal as claimed in claim 4, which is characterized in that judge that the GPS terminal installation is
It is no it is normal after, further include：
If abnormal, the abnormal prompting of installation is sent.
6. the installation testing method of GPS terminal as claimed in claim 5, which is characterized in that the installation normally prompts for
Any one in text prompt, graphical cues, luminous prompting, auditory tone cues or arbitrary a variety of combination.
7. the installation testing method of GPS terminal as claimed in claim 6, which is characterized in that the installation is abnormal to be prompted for
Any one in text prompt, graphical cues, luminous prompting, auditory tone cues or arbitrary a variety of combination.
8. the installation testing method of GPS terminal as claimed in claim 7, which is characterized in that after sending the normal prompting of installation
Or it after sending the abnormal prompting of installation, further includes：
Form installation situation record.
9. a kind of installation test server of GPS terminal, which is characterized in that including：
Receiving module, for receiving the vehicle voltage under the current state of GPS terminal upload and the vehicle after change starting state
Voltage, wherein, the current state is one kind in startup or flameout state, and the change starting state is to be switched to above-mentioned two
The another kind of kind state；
Reminding module, for sending the instruction for changing vehicle launch state；
Judgment module calculates the voltage of the vehicle voltage and the vehicle voltage after the change starting state under the current state
Difference compares the voltage difference and predeterminated voltage threshold, judges whether the GPS terminal installation is normal.
10. a kind of mounting test system of GPS terminal, which is characterized in that including：
GPS terminal for uploading the vehicle voltage under current state to server, and is uploaded after vehicle launch state is changed and changed
Become the vehicle voltage after starting state to the server, wherein, the current state is one kind in startup or flameout state,
The change starting state is the another kind for being switched to above two state；
APP terminals, for the instruction for the change vehicle launch state for coming from the server is presented, and presents come from it is described
Server judges the whether normal result of the GPS terminal；
Server, for receiving vehicle voltage and the change startup shape under the current state of the GPS terminal upload
Vehicle voltage after state, send change the instruction of vehicle launch state, calculate vehicle voltage under the current state with it is described
Change voltage difference, the comparison voltage difference and the predeterminated voltage threshold of the vehicle voltage after starting state and judge institute
Whether normal state GPS terminal installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610292811.2A CN105974443B (en) | 2016-05-04 | 2016-05-04 | Installation testing method, server and the system of GPS terminal |
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|---|---|---|---|
| CN201610292811.2A CN105974443B (en) | 2016-05-04 | 2016-05-04 | Installation testing method, server and the system of GPS terminal |
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| CN105974443B true CN105974443B (en) | 2018-06-01 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474566B (en) * | 2020-05-20 | 2023-06-16 | 上海评驾科技有限公司 | Method for judging installation condition of road transport vehicle satellite positioning system terminal |
| CN111983649B (en) * | 2020-07-21 | 2021-03-05 | 上海万位科技有限公司 | Vehicle GPS equipment off-line performance prediction method based on automatic analysis |
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| US20140004887A1 (en) * | 2012-06-29 | 2014-01-02 | Qualcomm Incorporated | Crystal oscillator calibration |
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| CN101110520A (en) * | 2007-08-03 | 2008-01-23 | 深圳华强信息产业有限公司 | Control method for vehicle mounted GPS terminal two times lowering electricity |
| CN102555942A (en) * | 2012-01-13 | 2012-07-11 | 中国重汽集团济南动力有限公司 | Intelligent passenger car system using network |
| CN202797557U (en) * | 2012-10-15 | 2013-03-13 | 成都众易通科技有限公司 | Vehicle GPS terminal wiring device |
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| CN105974443A (en) | 2016-09-28 |
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