CN105996402A - Intelligent backpack and control method and control system for same - Google Patents
Intelligent backpack and control method and control system for same Download PDFInfo
- Publication number
- CN105996402A CN105996402A CN201610282502.7A CN201610282502A CN105996402A CN 105996402 A CN105996402 A CN 105996402A CN 201610282502 A CN201610282502 A CN 201610282502A CN 105996402 A CN105996402 A CN 105996402A
- Authority
- CN
- China
- Prior art keywords
- knapsack
- intelligence knapsack
- intelligence
- led
- mcu
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45F—TRAVELLING OR CAMP EQUIPMENT: SACKS OR PACKS CARRIED ON THE BODY
- A45F3/00—Travelling or camp articles; Sacks or packs carried on the body
- A45F3/04—Sacks or packs carried on the body by means of two straps passing over the two shoulders
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/005—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 with correlation of navigation data from several sources, e.g. map or contour matching
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/3453—Special cost functions, i.e. other than distance or default speed limit of road segments
- G01C21/3492—Special cost functions, i.e. other than distance or default speed limit of road segments employing speed data or traffic data, e.g. real-time or historical
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/36—Input/output arrangements for on-board computers
- G01C21/3626—Details of the output of route guidance instructions
- G01C21/3632—Guidance using simplified or iconic instructions, e.g. using arrows
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45F—TRAVELLING OR CAMP EQUIPMENT: SACKS OR PACKS CARRIED ON THE BODY
- A45F2200/00—Details not otherwise provided for in A45F
- A45F2200/05—Holder or carrier for specific articles
- A45F2200/0525—Personal portable computing devices, e.g. laptop, tablet, netbook, game boy, navigation system, calculator
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Navigation (AREA)
Abstract
The invention relates to the technical field of intelligent backpacks and provides an intelligent backpack and a control method and a control system for the same. The control method comprises the steps that the intelligent backpack receives navigation route information sent by an intelligent terminal and stores the information in a storage device of the backpack; the intelligent backpack calls a GPS module to monitor a current position; and when an entry position area satisfies a preset conditions, the intelligent backpack can control an LED lamp to start preset mode work. According to the embodiment of the invention, demands of a rider are analyzed sufficiently; and the received route navigation information from the intelligent terminal of a user is combined under control of the GPS module and an MCU in the intelligent backpack, so that the LED lamp which is disposed on the intelligent backpack and used to indicate turning can be triggered in advance to begin flickering before the turning is started, and thus the user's safety is further ensured.
Description
[technical field]
The present invention relates to intelligence knapsack technical field, particularly relate to a kind of intelligence knapsack and control method thereof and
Control system.
[background technology]
Existing intelligence knapsack generally comprises intelligent object, various data-interface, power module etc..For
For the intelligent knapsack of some outdoor activity, also can be designed with GPS module, SOS lamp module;For
The intelligent knapsack used in some cities, it is also possible to be provided with the configurations such as reflecting strips.
But, do not have a kind of intelligent knapsack exclusively for user's design of riding the most on the market, owing to riding
The more conventional outdoor activity of user have the particularity of its sports center, therefore, the intelligence provided in prior art
Energy knapsack can not fully meet the demand of the user that rides.In consideration of it, overcome the defect existing for the prior art
It it is the art problem demanding prompt solution.
[summary of the invention]
The technical problem to be solved in the present invention is that existing intelligence knapsack is usually designed for open air and makes on foot
With, therefore, the usually normal GPS location of its function carried, SOS lamp, standby battery etc.
Function, and for specialty rides fan, above-mentioned each functional module and the function of offer thereof, not
Can well give the guarantee that bicyclist is enough.
The present invention adopts the following technical scheme that
First aspect, embodiments provides a kind of intelligence knapsack control method, described control method bag
Include:
Intelligence knapsack receives the navigation route information that intelligent terminal sends, and is stored in the memorizer of self;
Intelligence knapsack calls GPS module, is used for monitoring current location;
When region, in-position meets pre-conditioned, intelligence knapsack controls LED and carries out preset mode work.
Preferably, described navigation route information is mainly made up of flex point coordinate figure main in path, then described work as
Region, in-position meets pre-conditioned, and intelligence knapsack controls LED and carries out preset mode work, tool
Body includes:
The location parameter that feed back according to GPS module of MCU in intelligence knapsack, calculate and flex point coordinate figure away from
From;
When described distance is less than predetermined threshold value, then control on intelligence knapsack in LED with turn round direction homonymy
LED chip work.
Preferably, described navigation route information also includes that the take place frequently coordinate in section of vehicle accident is interval, then described
When region, in-position meets pre-conditioned, intelligence knapsack controls LED and carries out preset mode work,
Specifically include:
The location parameter that MCU in intelligence knapsack feeds back according to GPS module, confirms that current location is in described
The take place frequently coordinate in section of vehicle accident is interval, then control on intelligence knapsack in LED each LED chip periodically
Flicker.
Preferably, described method also includes:
MCU in intelligence knapsack periodically uses GPS module to monitor the current location information obtained, check and correction
The navigation route information received from intelligent terminal's side joint;
Confirm current location information have deviated from guidance path exceed predetermined threshold value time, to intelligent terminal send
Navigation route information is more newly requested;
The navigation route information received is utilized to update the historical navigation paths information of self storage.
Second aspect, embodiments provides a kind of intelligence knapsack, and described intelligence knapsack includes GPS mould
Block, wireless transceiver, at least two group LED, power module, MCU module and memorizer, concrete:
Described power module, memorizer, GPS module are connected with MCU module respectively with radio receiving transmitting module, and
It is fixed on described intelligence knapsack;
Described at least two group LED are connected to power module and MCU module, and are fixed on institute in a symmetrical
State the both sides in intelligence knapsack front.
Preferably, each group LED has one or more LED chip to constitute, and each LED chip can send
One or more colors, and it is able to receive that the single-point from MCU controls and/or multiparty control.
The third aspect, embodiments provides a kind of intelligence knapsack control system, described control system bag
Include intelligence knapsack and intelligent terminal, concrete:
Described intelligence knapsack, for receiving the navigation route information that intelligent terminal sends, and is stored in memorizer
In;In intelligence knapsack, MCU calls GPS module, is used for monitoring current location;When region, in-position meets
Time pre-conditioned, MCU controls LED and carries out preset mode work;
Described intelligent terminal, for being converted into the navigation that can be used by intelligence knapsack by the guidance path in map
Routing information, and described navigation route information is sent to described intelligence knapsack.
Preferably, the navigation route information that described intelligent terminal converts is mainly by flex point coordinate figure main in path
Constituting, the most described intelligence knapsack is additionally operable to the location parameter of the GPS module feedback according to self, calculates and turns
The distance of point coordinates value;When described distance is less than predetermined threshold value, then control on intelligence knapsack in LED with
Turn round direction homonymy LED chip work.
Preferably, the navigation route information that described intelligent terminal converts also includes that vehicle accident takes place frequently the seat in section
Mark interval, the most described intelligence knapsack is additionally operable to the location parameter according to GPS module feedback, confirms current location
It is in the take place frequently coordinate in section of described vehicle accident interval, then controls on intelligence knapsack each LED core in LED
Sheet periodic flicker.
Preferably, described system also includes that handlebar sensor, described handlebar sensor are arranged on bicycle
On handlebar, and set up control signal link, specifically by the wireless transceiver of wireless signal with intelligence knapsack
:
When corresponding left and right handlebar sensor is triggered, intelligence knapsack is correspondingly positioned at knapsack frontal left
Work with the LED on right side.
Compared with prior art, the beneficial effects of the present invention is: the embodiment of the present invention demand to bicyclist
Do enough analyses, and utilized under GPS module and MCU control in intelligence knapsack, coordinated receive to come
From the path navigation information of user intelligent terminal such that it is able to trigger before premise is turned round in entrance on intelligence knapsack
The LED turned to for instruction starts flicker, further ensure that the safety of user.
[accompanying drawing explanation]
Fig. 1 is a kind of intelligence knapsack control method schematic flow sheet that the embodiment of the present invention provides;
Fig. 2 is the another kind of intelligence knapsack control method schematic flow sheet that the embodiment of the present invention provides;
Fig. 3 is a kind of intelligence knapsack control method schematic flow sheet that the embodiment of the present invention provides;
Fig. 4 is the structural representation of a kind of intelligence knapsack that the embodiment of the present invention provides;
Fig. 5 is the structural representation of a kind of intelligence knapsack that the embodiment of the present invention provides;
Fig. 6 is the configuration diagram of a kind of intelligence knapsack control system that the embodiment of the present invention provides.
[detailed description of the invention]
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and reality
Execute example, the present invention is further elaborated.Only should be appreciated that specific embodiment described herein
Only in order to explain the present invention, it is not intended to limit the present invention.
As long as additionally, technical characteristic involved in each embodiment of invention described below is each other
Between do not constitute conflict just can be mutually combined.
Embodiment 1:
Embodiments provide a kind of intelligence knapsack control method, as it is shown in figure 1, described control method
Including:
In step 201, intelligence knapsack receives the navigation route information that intelligent terminal sends, and is stored in certainly
In the memorizer of body.
Wherein, described intelligence knapsack receives the trigger mechanism of the navigation route information that intelligent terminal sends, permissible
It is that the intelligent terminal actively having wireless digital to connect to foundation after intelligence knapsack starts initiates, it is preferred that
Intelligence knapsack also starts watcher thread, such as: periodically send routing information to intelligent terminal more newly requested
Message, in order to compare with the path of self storage, confirm whether the course of user changes;Also
Can be the passive path data receiving intelligent terminal's propelling movement, it is preferred that when intelligent terminal have updated user
Travel path after, can again active push path data give described intelligence knapsack.
In step 202., intelligence knapsack calls GPS module, is used for monitoring current location.
It is implemented as in intelligence knapsack the MCU installed and controls described GPS module, working as of monitoring intelligence knapsack
Front position.
In step 203, full with described navigation route information matching result when intelligence region, knapsack in-position
When foot is pre-conditioned, intelligence knapsack controls LED and carries out preset mode work.
Wherein, described coupling meets and pre-conditioned includes entering soon angle position and/or fast entrance accident position occurred frequently
Putting etc., and described LED carries out preset mode work, corresponding includes: mode one, with band direction
The mode flicker of instruction, i.e. could be made that, to reach to indicate, the prompting turned to;Mode two, with altofrequency, highlighted
The mode of degree flashes, to reach to improve the effect that warning is passing.In implementing, except using LED
Outward, it is also possible to use other can produce the accessory of described flicker, instruction, alarming effect equally.
The demand of bicyclist has been done enough analyses by the embodiment of the present invention, and utilizes GPS mould in intelligence knapsack
Under block and MCU control, coordinate the path navigation information from user intelligent terminal received such that it is able to
Before entering premise of turning round, trigger the LED turned to for instruction on intelligence knapsack start flicker, further
Ensure that the safety of user.
In conjunction with the embodiment of the present invention, there is a kind of preferably implementation, wherein, described navigation route information
Mainly it is made up of, then as in figure 2 it is shown, step 203 is implemented as follows flex point coordinate figure main in path:
In step 2031, the location parameter that feed back according to GPS module of MCU in intelligence knapsack, calculate and
The distance of flex point coordinate figure.
In step 2032, when described distance is less than predetermined threshold value, confirm current line truck position or pedestrian
Position is already close to corner location, after execution 2033, otherwise performs step 2034.
In step 2033, control on intelligence knapsack the LED chip work with the direction homonymy that turns round in LED.
In step 2034, keep original LED duty.
Wherein, keep original LED duty to be particularly suited for user and be i.e. in stretch of road prone to traffic accidents,
Again realize intelligence knapsack on LED turn round direction homonymy LED chip work (homonymy non-with direction of turning round
LED chip do not work or do not affect the mode of the LED chip highlighting the direction homonymy that turns round work) want
Ask.
In conjunction with the embodiment of the present invention, navigation route information in addition to can comprising above-mentioned main flex point coordinate figure,
Described navigation route information can also include that the take place frequently coordinate in section of vehicle accident is interval, then step 203 is concrete
It is embodied as:
The location parameter that MCU in intelligence knapsack feeds back according to GPS module, confirms that current location is in described
The take place frequently coordinate in section of vehicle accident is interval, then control on intelligence knapsack in LED each LED chip periodically
Flicker.Wherein, it is preferred that enter the priority of directivity LED flashing mode in region of turning round be higher than into
Enter the periodic flicker mode in vehicle accident section occurred frequently.
In conjunction with the embodiment of the present invention, after step 203, as it is shown on figure 3, the embodiment of the present invention also includes:
In step 204, intelligence knapsack in MCU periodically use GPS module monitoring obtain current
Positional information, the navigation route information that check and correction receives from intelligent terminal's side joint.
In step 205, confirm current location information have deviated from guidance path exceed predetermined threshold value time,
Navigation route information is sent more newly requested to intelligent terminal.
In step 206, the navigation route information received is utilized to update the historical navigation paths of self storage
Information.
This expansion scheme, in the embodiment that compares 1, intelligence knapsack periodically sends navigation road to intelligent terminal
The mode of footpath information updating request, it is possible to save the intelligence more electric energy of knapsack so that the continuation of the journey of intelligence knapsack
Ability is further improved.
Embodiment 2:
In addition to the control method of a kind of intelligence knapsack that the embodiment of the present invention is introduced in providing such as embodiment 1,
A kind of intelligence knapsack for realizing method described in embodiment 1 is additionally provided, such as Fig. 4 in the present embodiment 2
Shown in Fig. 5, described intelligence knapsack includes GPS module 21, wireless transceiver 22, at least two group LED
23, power module 24, MCU module 25 and memorizer 26, concrete:
Described power module 24, memorizer 26, GPS module 21 and radio receiving transmitting module respectively with MCU module
25 are connected, and are fixed on described intelligence knapsack.
Wherein, radio receiving transmitting module specifically can be with bluetooth module or wifi module, it is also possible to be that other is permissible
With the radio receiving transmitting module that smart mobile phone sets up data channel.Under normal circumstances, described power module 24, deposit
The surface-mounted integrated circuit that reservoir 26, GPS module 21/ radio receiving transmitting module and MCU module 25 are constituted can be pacified
Be contained in bottom knapsack, the knapsack back side and knapsack front.
Described at least two group LED 23 are connected to power module 24 and MCU module 25, and in a symmetrical
It is fixed on the both sides in described intelligence knapsack front.
In conjunction with the embodiment of the present invention, there is also a kind of preferably expansion scheme, each group LED 23 have one or
The multiple LED chip of person is constituted, and each LED chip can send one or more colors, and be able to receive that
Single-point from MCU controls and/or multiparty control.
A kind of intelligence knapsack that the present embodiment is proposed is additionally operable to realize the method described in embodiment 1, at this
Repeat the most one by one.
Embodiment 3:
The embodiment of the present invention additionally provides a kind of intelligence knapsack control system, the most described control system
Including intelligence knapsack 1 and intelligent terminal 2, concrete:
Described intelligence knapsack 1, for receiving the navigation route information that intelligent terminal 2 sends, and is stored in storage
In device 26;In intelligence knapsack 1, MCU calls GPS module 21, is used for monitoring current location;Work as in-position
When region meets pre-conditioned, MCU controls LED 23 and carries out preset mode work.
Described intelligent terminal 2, can be by leading that intelligence knapsack 1 uses for being converted into by the guidance path in map
Bit path information, and described navigation route information is sent to described intelligence knapsack 1.
In conjunction with the embodiment of the present invention, there is also a kind of preferably implementation, described intelligent terminal 2 converts
Navigation route information is mainly made up of flex point coordinate figure main in path, and the most described intelligence knapsack 1 is additionally operable to root
The location parameter fed back according to the GPS module 21 of self, calculates the distance with flex point coordinate figure;When described distance
During less than predetermined threshold value, then control on intelligence knapsack 1 LED chip with the direction homonymy that turns round in LED 23
Work.
In conjunction with the embodiment of the present invention, there is also a kind of preferably implementation, described intelligent terminal 2 converts
Navigation route information also includes that the take place frequently coordinate in section of vehicle accident is interval, and the most described intelligence knapsack 1 is additionally operable to
According to the location parameter of GPS module 21 feedback, confirm that current location is in described vehicle accident and takes place frequently section
Coordinate is interval, then each LED chip periodic flicker in LED 23 on control intelligence knapsack 1.
In conjunction with the embodiment of the present invention, there is also a kind of preferably implementation, described system also includes handlebar
Sensor, described handlebar sensor is arranged on bicycle handle bar on hand, and by wireless signal and the intelligence back of the body
The wireless transceiver 22 of bag 1 sets up control signal link, concrete:
When corresponding left and right handlebar sensor is triggered, intelligence knapsack 1 is correspondingly positioned at knapsack front left
The LED 23 on side and right side works.
What deserves to be explained is, the information between said apparatus and intrasystem module, unit is mutual, performed
The contents such as journey, owing to the processing method embodiment with the present invention is based on same design, particular content can be found in this
Narration in inventive method embodiment, here is omitted.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of embodiment is can
Completing instructing relevant hardware by program, this program can be stored in a computer-readable storage medium
In matter, storage medium may include that read only memory (ROM, Read Only Memory), random access memory
Memorizer (RAM, Random Access Memory), disk or CD etc..
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Any amendment, equivalent and the improvement etc. made within bright spirit and principle, should be included in the present invention
Protection domain within.
Claims (10)
1. an intelligent knapsack control method, it is characterised in that described control method includes:
Intelligence knapsack receives the navigation route information that intelligent terminal sends, and is stored in the memorizer of self;
Intelligence knapsack calls GPS module, is used for monitoring current location;
When region, in-position meets pre-conditioned, intelligence knapsack controls LED and carries out preset mode work.
Intelligence knapsack control method the most according to claim 1, it is characterised in that described guidance path
Information spinner to be made up of flex point coordinate figure main in path, then described when region, in-position meets pre-conditioned,
Intelligence knapsack controls LED and carries out preset mode work, specifically includes:
The location parameter that feed back according to GPS module of MCU in intelligence knapsack, calculate and flex point coordinate figure away from
From;
When described distance is less than predetermined threshold value, then control on intelligence knapsack in LED with turn round direction homonymy
LED chip work.
Intelligence knapsack control method the most according to claim 1 and 2, it is characterised in that described navigation
Routing information also includes that the take place frequently coordinate in section of vehicle accident is interval, then described when region, in-position meets pre-
If condition, intelligence knapsack controls LED and carries out preset mode work, specifically includes:
The location parameter that MCU in intelligence knapsack feeds back according to GPS module, confirms that current location is in described
The take place frequently coordinate in section of vehicle accident is interval, then control on intelligence knapsack in LED each LED chip periodically
Flicker.
Intelligence knapsack control method the most according to claim 1, it is characterised in that described method is also wrapped
Include:
MCU in intelligence knapsack periodically uses GPS module to monitor the current location information obtained, check and correction
The navigation route information received from intelligent terminal's side joint;
Confirm current location information have deviated from guidance path exceed predetermined threshold value time, to intelligent terminal send
Navigation route information is more newly requested;
The navigation route information received is utilized to update the historical navigation paths information of self storage.
5. an intelligent knapsack, it is characterised in that described intelligence knapsack include GPS module, wireless transceiver,
At least two group LED, power module, MCU module and memorizer, concrete:
Described power module, memorizer, GPS module are connected with MCU module respectively with radio receiving transmitting module, and
It is fixed on described intelligence knapsack;
Described at least two group LED are connected to power module and MCU module, and are fixed on institute in a symmetrical
State the both sides in intelligence knapsack front.
Intelligence knapsack the most according to claim 5, it is characterised in that each group LED have one or
Multiple LED chip are constituted, and each LED chip can send one or more colors, and be able to receive that
Control and/or multiparty control from the single-point of MCU.
7. an intelligent knapsack control system, it is characterised in that described control system includes intelligence knapsack and intelligence
Energy terminal is concrete:
Described intelligence knapsack, for receiving the navigation route information that intelligent terminal sends, and is stored in memorizer
In;In intelligence knapsack, MCU calls GPS module, is used for monitoring current location;When region, in-position meets
Time pre-conditioned, MCU controls LED and carries out preset mode work;
Described intelligent terminal, for being converted into the navigation that can be used by intelligence knapsack by the guidance path in map
Routing information, and described navigation route information is sent to described intelligence knapsack.
Intelligence knapsack control system the most according to claim 7, it is characterised in that described intelligent terminal
The navigation route information converted mainly is made up of flex point coordinate figure main in path, and the most described intelligence knapsack is also used
In the location parameter that the GPS module according to self is fed back, calculate the distance with flex point coordinate figure;When described away from
From during less than predetermined threshold value, then control on intelligence knapsack the LED chip work with the direction homonymy that turns round in LED
Make.
Intelligence knapsack control system the most according to claim 7, it is characterised in that described intelligent terminal
The navigation route information converted also includes that the take place frequently coordinate in section of vehicle accident is interval, and the most described intelligence knapsack is also
For the location parameter fed back according to GPS module, confirm that current location is in described vehicle accident and takes place frequently section
Coordinate interval, then control on intelligence knapsack each LED chip periodic flicker in LED.
Intelligence knapsack control system the most according to claim 7, it is characterised in that described system is also
Including handlebar sensor, described handlebar sensor is arranged on bicycle handle bar on hand, and passes through wireless communication
Number with intelligence knapsack wireless transceiver set up control signal link, concrete:
When corresponding left and right handlebar sensor is triggered, intelligence knapsack is correspondingly positioned at knapsack frontal left
Work with the LED on right side.
Priority Applications (1)
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CN201610282502.7A CN105996402A (en) | 2016-04-29 | 2016-04-29 | Intelligent backpack and control method and control system for same |
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CN201610282502.7A CN105996402A (en) | 2016-04-29 | 2016-04-29 | Intelligent backpack and control method and control system for same |
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Cited By (1)
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CN110081896A (en) * | 2019-05-05 | 2019-08-02 | 杭州电子科技大学 | A kind of identification of crossing security risk and processing method and system based on intelligent school bag |
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CN204617309U (en) * | 2015-05-05 | 2015-09-09 | 韩一青 | The safe school bag of solar energy |
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CN201373915Y (en) * | 2009-03-18 | 2009-12-30 | 深圳市赛格导航科技股份有限公司 | Navigation device |
CN201431057Y (en) * | 2009-06-26 | 2010-03-31 | 鲍继怀 | Positioning schoolbag dedicated for children |
CN202525322U (en) * | 2012-04-19 | 2012-11-14 | 贾建军 | Multifunctional schoolbag |
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Application publication date: 20161012 |