CN201662401U - Automobile-mounted navigation equipment with alcohol detection function and safety driving service system - Google Patents
Automobile-mounted navigation equipment with alcohol detection function and safety driving service system Download PDFInfo
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- CN201662401U CN201662401U CN2010201496478U CN201020149647U CN201662401U CN 201662401 U CN201662401 U CN 201662401U CN 2010201496478 U CN2010201496478 U CN 2010201496478U CN 201020149647 U CN201020149647 U CN 201020149647U CN 201662401 U CN201662401 U CN 201662401U
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Abstract
The utility model relates to automobile-mounted navigation equipment with an alcohol detection function and a safety driving service system. The automobile-mounted navigation equipment comprises a satellite navigation positioning module, a control module connected with the satellite navigation positioning module, an alcohol detection module, a voice module, a microphone, an extraction fan and a wireless communication module, wherein the alcohol detection module, the voice module and the microphone are connected with the controller module; the horn is connected to the voice module and the control module; the extraction fan is used for extracting the gas near the driving position of the automobile to a probe of the alcohol sensor; and the wireless communication module is connected to the control module. By implementing the utility model, the alcohol content in the automobile can be conveniently detected in time so as to transmit prompt information and alarm information when the alcohol content exceeds the detection threshold to acquire the safety driving service and reduce the generation rate of traffic accidents.
Description
Technical field
The utility model relates to the vehicle safety travel technology, more particularly, relates to a kind of can identification of driver driving when intoxicated and the in-vehicle navigation apparatus and the vehicle security drive service system of automatic speech prompting.
Background technology
In current society, drive to cause the example of traffic hazard not within minority because of drunk, the whole nation is annual all to have a large amount of traffic hazards to cause owing to driving when intoxicated.Renovate drunk driving, not only relate to motorist's self safety, be related to the long-drawn-out pass major issue of pedestrian's life security especially.Drunk extensive concern of driving to cause society, national traffic police department also cracks down and prevents the drunk behavior of driving.
Existing alcohol detection requires the user to face toward the expiration tube and exhales based on hand-held expiration formula, and the duration surpassed for three seconds, and carried, uses inconvenience.After a lot of drivers drink, often have idea of leaving things to chance, still attempt to drive.And prior art can't initiatively be monitored drunk the driving of driver, has very big potential safety hazard.Therefore need a kind of vehicle-mounted alcohol content tester, so that the driver is monitored, and when detected alcohol content exceeds standard, take corresponding measure.
The utility model content
The technical problems to be solved in the utility model is, carries, uses inconvenient defective at the above-mentioned alcohol content tester of prior art, and a kind of in-vehicle navigation apparatus with alcohol detection function is provided.
The technical problems to be solved in the utility model is, can't provide a kind of vehicle security drive service system initiatively to the drunk defective of driving to monitor, exist potential safety hazard of driver at prior art.
A kind of technical scheme that its technical matters that solves the utility model adopts is: construct a kind of in-vehicle navigation apparatus with alcohol detection function, comprise satellite navigation locating module and coupled control module, it is characterized in that, also comprise the alcohol detection module, voice module and the microphone that link to each other with described control module, and the loudspeaker that are connected in described voice module and control module.
In the in-vehicle navigation apparatus with alcohol detection function described in the utility model, described alcohol detection module comprises alcohol sensor and coupled signal amplifier, and the output terminal of wherein said signal amplifier is connected to described control module.
In the in-vehicle navigation apparatus with alcohol detection function described in the utility model, described in-vehicle navigation apparatus also is provided with an extraction fan that is used near the gas the steering position in the car is drawn to the probe place of described alcohol sensor.
In the in-vehicle navigation apparatus with alcohol detection function described in the utility model, also comprise the wireless communication module that is connected in described control module.
In the in-vehicle navigation apparatus with alcohol detection function described in the utility model, described control module comprise be used for from described alcohol detection module receive alcohol content information sampling module, be used to store the storer of detection threshold and be used for determining according to described alcohol content information and detection threshold whether alcohol content surpasses the judge module of detection threshold; Wherein, when described judge module determines that alcohol content surpasses predetermined threshold, send trigger pip, to export voice signal to described loudspeaker to described voice module.
In the in-vehicle navigation apparatus with alcohol detection function described in the utility model, be used to the power supply of described in-vehicle navigation apparatus power supply to comprise automobile supply module and dry cell; Wherein, described automobile supply module is used to described extraction fan, voice module and loudspeaker power supply, and described dry cell is used to described alcohol sensor, signal amplifier and control module power supply.
In the in-vehicle navigation apparatus with alcohol detection function described in the utility model, described control module is connected with the testing circuit that is used to detect automobile ACC/ vehicle door status.
In the in-vehicle navigation apparatus with alcohol detection function described in the utility model, described control module also is connected with display module, and described control module, wireless communication module, satellite navigation locating module, alcohol detection module, extraction fan, voice module, loudspeaker, microphone and display module all are installed on the casing.
Another technical scheme that its technical matters that solves the utility model adopts is: construct a kind of vehicle security drive service system, it is characterized in that, comprise as claim 4,6 or 7 describedly having the in-vehicle navigation apparatus of alcohol detection function and communicate with continuous backstage service centre.
Implement the utility model, have following beneficial effect: can make things convenient for, detect in time alcohol content in the car, whether drunk to judge the driver.And when alcohol content surpasses detection threshold, sending information, the prevention driver drives when intoxicated, with protection driver and pedestrian's life security.
In addition, by sending warning message and positional information to backstage service centre, sail the service of driving with the safety of obtaining service centre and providing, thereby reduce the incidence of traffic safety accident.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural representation according to the in-vehicle navigation apparatus with alcohol detection function of the utility model one embodiment;
Fig. 2 is the structural representation according to alcohol detection module in the in-vehicle navigation apparatus with alcohol detection function of the utility model one embodiment;
Fig. 3 is the structural representation according to control module in the in-vehicle navigation apparatus with alcohol detection function of the utility model one embodiment;
Fig. 4 is the structural representation according to the vehicle security drive service system of the utility model one embodiment;
Fig. 5 is the electric power-feeding structure synoptic diagram according to the in-vehicle navigation apparatus with alcohol detection function of the utility model one embodiment;
Fig. 6 is the flow chart of steps according to the vehicle security drive method of servicing of the utility model one embodiment;
Fig. 7 is the flow chart of steps according to the vehicle security drive method of servicing of another embodiment of the utility model.
Embodiment
The utility model provides a kind of in-vehicle navigation apparatus with alcohol detection function, uses this in-vehicle navigation apparatus, need not the driver and carries alcohol content tester, and need not to exhale for three seconds facing to detector, be i.e. the interior alcohol content of inspection vehicle automatically.And after detecting alcohol content and exceeding standard, can send voice suggestion automatically, remind the driver not drive when intoxicated.In addition, after detecting alcohol content and exceeding standard, this in-vehicle navigation apparatus can also be notified backstage service centre, and service centre can in time give well-meaning prompting and corresponding service is provided.Can reduce the quantity of driving when intoxicated effectively.
Fig. 1 is the structural representation according to the in-vehicle navigation apparatus with alcohol detection function of the utility model one embodiment.As shown in Figure 1, in-vehicle navigation apparatus 100 comprises: control module 110, wireless communication module 120, satellite navigation locating module 130, alcohol detection module 140, extraction fan 142, voice module 144, loudspeaker 150 and microphone 160.Wherein, wireless communication module 120, satellite navigation locating module 130, alcohol detection module 140, voice module 144, loudspeaker 150, microphone 160 link to each other with control module 110 signals respectively.
In-vehicle navigation apparatus of the present utility model has also increased new function except having traditional navigation, searching route function: such as alcohol detection and communication function.In addition, display module (for example display screen is not shown) also can be set, to show guidance path on the in-vehicle navigation apparatus to the user.
Extraction fan 142 is used near the gas the steering position in the car is drawn to the alcohol sensor probe place of alcohol detection module as preferred disposition.In other embodiments, also can not dispose extraction fan.
Satellite navigation locating module 130 is used to receive the satellite navigation positioning signal, generates locating information after control module 110 is handled.For example, satellite navigation locating module 130 can be used to receive the satellite navigation positioning signal of GPS positioning system, Beidou satellite navigation location or Galileo (Galileo) satellite navigation and location system etc.Wireless communication module 120 can communicate (such as note and voice communication) based on wireless communication protocol (for example GSM, CDMA or GPRS) and remote wireless communication device, to transmit or interactive information.
In the in-vehicle navigation apparatus with alcohol detection function of the present utility model, control module 110, wireless communication module 120, satellite navigation locating module 130, alcohol detection module 140, extraction fan 142, voice module 144, loudspeaker 150 and microphone 160 and display module all are installed on the casing, and promptly alcohol detection and radio communication function are integrated on traditional in-vehicle navigation apparatus.This implementation makes that the in-vehicle navigation apparatus function is more powerful, for the user has brought convenience.Because the alcohol detection module is integrated on the casing of in-vehicle navigation apparatus, need not install separately in addition, has reduced installation cost, also can not damage former facility or decoration in the car.
Function/the effect of the utility model in-vehicle navigation apparatus miscellaneous part will be described in detail in conjunction with Fig. 2 and Fig. 3 in the back.
Fig. 2 is the structural representation according to alcohol detection module in the in-vehicle navigation apparatus with alcohol detection function of the utility model one embodiment.As shown in Figure 2, alcohol detection module 140 comprises alcohol sensor 142 and coupled signal amplifier 144, is used for alcohol content in the inspection vehicle.
Because confined space is big in the car, airborne alcohol content is lower, and general sensor construction is difficult to detect airborne alcohol content.In preferred embodiment of the present utility model, pass through extraction fan, air-flow in the car is drawn near the probe of alcohol sensor, by signal amplifier the detected feeble signal of alcohol sensor is amplified again, transfer to control module behind the signal after will amplifying again and handle.
Fig. 3 is the structural representation according to control module in the in-vehicle navigation apparatus with alcohol detection function of the utility model one embodiment.As shown in Figure 3, control module 110 comprises processor 112, sampling module 114, storer 116, reaches interface module 118.Wherein, processor 112 comprises judge module 112a, and interface module 118 comprises satellite navigation locating module interface 118a, communication module interface 118b, voice module interface 118c, audio frequency I/O interface 118d and display module interface 118e.
Sampling module (114) is used for receiving alcohol content information from described alcohol detection module; The detection threshold that storer (116) is used to store the alcohol content overproof; Judge module (112a) is used for whether surpassing detection threshold according to alcohol content information and detection threshold by relatively more definite alcohol content.In one embodiment, when definite alcohol content surpasses predetermined threshold, control module sends trigger pip to voice module by voice module interface 118c, drives voice module output voice signal to loudspeaker 9 (for example the voice that the driver " does not please drive when intoxicated " are reminded in output).In another embodiment, control module to the alcohol content information analysis, judge that the back by the voice suggestion alcohol content just.In yet another embodiment, if alcohol content exceeds standard, control module sends trigger pip to voice module by voice module interface 118c, sends warning message and locating information to communication module by communication module interface 118b simultaneously, with outside transmission this.
In embodiment of the present utility model, control module can be used realizations such as single-chip microcomputer, microprocessor.
In one embodiment, sampling module comprises the AD modular converter, and sampling is through the detection signal of signal amplifier.
As selection, in order to prevent wrong report, detect alcohol content at every turn and exceed standard, voice module control loudspeaker are only reported three times.The utility model is in order further to reduce wrong report, and the man-machine interactively that adds backstage service centre is simultaneously judged service function.
Control module is accepted the positional information from the transmission of satellite navigation locating module constantly, but does not send to backstage service centre, to save flow.Have only when control module judges that alcohol content exceeds standard (as trigger condition), just can immediately positional information and warning message be passed to backstage service centre automatically by radio communication channel together.
Fig. 4 is the structural representation according to the vehicle security drive service system of the utility model one embodiment.As shown in Figure 2, the vehicle security drive service system comprises in-vehicle navigation apparatus 100 and backstage service centre 210.Wherein, in-vehicle navigation apparatus 100 communicates to connect by radio communication channel 122 with backstage service centre 210.In-vehicle navigation apparatus 100 is used for warning message and satellite navigation locating information being sent to backstage service centre by radio communication channel, so that provide corresponding safe driving service by the backstage under the alcohol content testing result exceeds standard in car the situation.
Fig. 5 is the synoptic diagram according to the power supply configuration of the in-vehicle navigation apparatus with alcohol detection function of the utility model one embodiment.As shown in Figure 5, at the utility model one embodiment, the power supply of in-vehicle navigation apparatus configuration is as follows: by the automobile supply module is extraction fan, voice module and loudspeaker power supply; In order to reduce the influence of automobile supply module voltage disturbance, the employing dry cell is alcohol sensor, signal amplifier and single-chip microcomputer power supply.Testing circuit is used to detect automobile ACC/ door state, also can be used for being provided with detection threshold.
Fig. 6 is the flow chart of steps according to the vehicle security drive method of servicing 600 of the utility model one embodiment.As shown in Figure 6, steps flow chart according to the vehicle security drive method of servicing of the utility model one embodiment starts from step 610, afterwards, carry out step 612, the alcohol detection module detects the alcohol content near the gas in car steering position, and detected alcohol content information is sent to control module; Receive detected alcohol content information in step 614 control module; In step 616, control module compares alcohol content information and the detection threshold that is stored in the storer, judges whether alcohol content exceeds standard; Judge when alcohol content exceeded standard when alcohol content surpassed detection threshold in step 616, enter step 618, control module output control signal is to drive voice module output voice signal to loudspeaker.Afterwards, flow process ends at step 620.
When in step 616, judge that the flow process of method 600 ended at step 620 when alcohol content did not exceed standard.
Among the embodiment of the present utility model, beginning step 610 can start because of automotive ignition.The in-vehicle navigation apparatus startup of thereupon powering during automotive ignition.When in-vehicle navigation apparatus started, satellite navigation locating module and alcohol detection module started simultaneously, and the satellite navigation locating module is in order to the location, and the alcohol detection module is in order to alcohol content in the inspection vehicle.
Fig. 7 is the flow chart of steps according to the vehicle security drive method of servicing 700 of another embodiment of the utility model.As shown in Figure 7, according to the vehicle security drive method of servicing 700 of another embodiment of the utility model from step 710 to step 718 with vehicle security drive method of servicing 600 shown in Figure 6 step 610 to 618 identical, repeat no more herein.After step 716, also comprise step 722, the current locating information of the determined automobile of satellite navigation positioning signal that control module sends warning message and receives based on the satellite navigation locating module to backstage service centre by wireless communication module; In step 724, after service centre receives warning message, carry out information interaction, to examine the authenticity/accuracy of this warning message with in-vehicle navigation apparatus.In step 726, accurately under the situation, enter step 728 at warning message, backstage service centre starts follow-up service, and the safe driving service (will introduce in the back for information about) that provides is provided in this follow-up service.Step 730 when follow-up service is finished, enters end step 740.
When in step 716, judge that the flow process of method 700 ended at step 740 when alcohol content did not exceed standard.When in step 726, judge that the flow process of method 700 ends at step 740 under the wrong situation of warning message.
Among the embodiment of the present utility model, beginning step 710 can start because of automotive ignition.The in-vehicle navigation apparatus startup of thereupon powering during automotive ignition.When in-vehicle navigation apparatus started, satellite navigation locating module and alcohol detection module started simultaneously, and the satellite navigation locating module is in order to the location, and the alcohol detection module is in order to alcohol content in the inspection vehicle.
As an embodiment, the utility model judges that the method for warning message accuracy comprises: backstage service centre receives after the warning message, send instruction to in-vehicle navigation apparatus, open the realtime graphic of vehicle mounted imaging apparatus picked-up operator seat to indicate it, and in real time the image of operator seat is sent it back backstage service centre, image processing module by backstage service centre carries out Flame Image Process, comparison, analysis and discriminating, with judgement driver's state, thus the accuracy of definite warning message.
As another embodiment, the utility model judges that the method for warning message accuracy comprises: backstage service centre receives after the warning message, initiate to communicate by letter with the voice dialogue of in-vehicle navigation apparatus, request and driver's dialogue, talking with in the mutual process with the driver, speech processing module by backstage service centre is handled, compares, is analyzed and differentiate the voice signal that receives, with judgement driver's state, thus the accuracy of definite warning message.
In an embodiment of the present utility model, the vehicle security drive service comprise when automotive ignition start, at driver's engage a gear/before stepping on the gas, alcohol content surpasses detection threshold in the car if detect, send warning message, after confirming that warning message accurately, backstage service centre provides artificial generation to drive service for the user of this automobile.
In another embodiment of the present utility model, the vehicle security drive service comprise when automotive ignition start, at driver's engage a gear/before stepping on the gas, alcohol content surpasses detection threshold in the car if detect, send warning message, after confirming that warning message accurately, the control signal that can send cut-out automobile circuit/oil circuit immediately by the control module or the backstage service centre of in-vehicle navigation apparatus is driven when intoxicated to forbid the driver.In this case, the control module of in-vehicle navigation apparatus
In another embodiment of the present utility model, configuration of automobiles has the computer automated driving system, the vehicle security drive service comprise when the vehicle security drive service comprise when automotive ignition start, at driver's engage a gear/before or after stepping on the gas (being in the driving procedure), alcohol content surpasses detection threshold in the car if detect, and can start the computer automated driving system immediately by the control module or the backstage service centre of in-vehicle navigation apparatus.In this case, the control module of in-vehicle navigation apparatus will link to each other with the computer automated driving system.
In another embodiment, the flow process of vehicle security drive method of servicing of the present utility model comprises:
When 1, automotive ignition starts, the in-vehicle navigation apparatus startup of thereupon powering;
2, during system start-up, satellite navigation locating module and alcohol detection module start simultaneously, and the satellite navigation locating module is in order to the location, and the alcohol detection module is in order to alcohol content in the inspection vehicle;
3, when the alcohol detection module detects that alcohol content exceeds standard in the airtight air in the car, send this information to control module, the latter starts voice module, reminds the driver " please not drive when intoxicated ";
4, control module is accepted the positional information from the transmission of satellite navigation locating module constantly, but does not send to backstage service centre, to save flow.Have only when control module judges that alcohol content exceeds standard (as trigger condition), just can immediately positional information and warning message be passed to backstage service centre automatically by radio communication channel together.
5, the seat personnel of backstage service centre receive the report for police service after the information, will start artificial dialogue by communication module, confirm whether the driver drinks on the one hand, service such as drive for the driver provides corresponding generation on the one hand.
The utility model is measured based on active alcohol, and in environment inside car, need not the driver and just can detect alcohol content automatically facing to the tube expiration of exhaling, and the automatic speech prompting driver.Simultaneously, also information (alcohol content surpasses detection threshold and vehicle position information in the car) can be reported service centre.
Because the utility model is the content by alcohol in the active detecting air, judges with this whether the driver drinks.Confined space is bigger in the car, due to the alcohol molecule content in the gas volatilizees by driver's body fluid fully.So the alcohol content in the car in the confined space is extremely low, causes detection difficulty big, false-alarm probability increases.The utility model is integrated alcohol content detection module and communication module on traditional automatic navigator, and the alcohol content testing result is sent to backstage service centre by communication module, and then takes corresponding service measures.
Claims (10)
1. in-vehicle navigation apparatus with alcohol detection function, comprise satellite navigation locating module (130) and coupled control module (110), it is characterized in that, also comprise the alcohol detection module (140), voice module (144) and the microphone (160) that link to each other with described control module, and the loudspeaker (150) that are connected in described voice module and control module.
2. the in-vehicle navigation apparatus with alcohol detection function according to claim 1, it is characterized in that, described alcohol detection module comprises alcohol sensor (142) and coupled signal amplifier (144), and the output terminal of wherein said signal amplifier is connected to described control module.
3. the in-vehicle navigation apparatus with alcohol detection function according to claim 2 is characterized in that, described in-vehicle navigation apparatus also is provided with an extraction fan that is used near the gas the steering position in the car is drawn to the probe place of described alcohol sensor.
4. the in-vehicle navigation apparatus with alcohol detection function according to claim 3 is characterized in that, also comprises the wireless communication module (120) that is connected in described control module.
5. the in-vehicle navigation apparatus with alcohol detection function according to claim 3, it is characterized in that, described control module comprise be used for from described alcohol detection module receive alcohol content information sampling module (114), be used to store the storer (116) of detection threshold and be used for determining according to described alcohol content information and detection threshold whether alcohol content surpasses the judge module (112a) of detection threshold; Wherein, when described judge module determines that alcohol content surpasses predetermined threshold, send trigger pip, to export voice signal to described loudspeaker to described voice module.
6. the in-vehicle navigation apparatus with alcohol detection function according to claim 4, it is characterized in that, described control module comprise be used for from described alcohol detection module receive alcohol content information sampling module (114), be used to store the storer (116) of detection threshold and be used for determining according to described alcohol content information and detection threshold whether alcohol content surpasses the judge module (112a) of detection threshold; Wherein, when described judge module determines that alcohol content surpasses predetermined threshold, send trigger pip, to export voice signal to described loudspeaker to described voice module.
7. the in-vehicle navigation apparatus with alcohol detection function according to claim 6 is characterized in that, is used to the power supply of described in-vehicle navigation apparatus power supply to comprise automobile supply module and dry cell; Wherein, described automobile supply module is used to described extraction fan, voice module and loudspeaker power supply, and described dry cell is used to described alcohol sensor, signal amplifier and control module power supply.
8. according to each described in-vehicle navigation apparatus in the claim 1 to 5, it is characterized in that described control module is connected with the testing circuit that is used to detect automobile ACC/ vehicle door status with alcohol detection function.
9. according to each described in-vehicle navigation apparatus in the claim 3 to 6 with alcohol detection function, it is characterized in that, described control module also is connected with display module, and described control module, wireless communication module, satellite navigation locating module, alcohol detection module, extraction fan, voice module, loudspeaker, microphone and display module all are installed on the casing.
10. a vehicle security drive service system is characterized in that, comprises as claim 4,6 or 7 describedly having the in-vehicle navigation apparatus of alcohol detection function and communicating with continuous backstage service centre (210).
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102029909A (en) * | 2010-12-06 | 2011-04-27 | 无锡文美科技有限公司 | Intelligent traffic safety system for avoiding drunk driving |
| WO2011120353A1 (en) * | 2010-04-02 | 2011-10-06 | 深圳市赛格导航科技股份有限公司 | On-vehicle navigation equipment, on-vehicle drunken driving detecting device and method, safe driving service system and method for vehicle |
| CN102214385A (en) * | 2010-04-02 | 2011-10-12 | 深圳市赛格导航科技股份有限公司 | Vehicle-mounted device for detecting drunk driving and use method thereof for detecting drunk driving |
| CN102279243A (en) * | 2011-05-10 | 2011-12-14 | 惠州Tcl移动通信有限公司 | System and method for prompting alcohol information inside car through mobile terminal |
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| WO2011120353A1 (en) * | 2010-04-02 | 2011-10-06 | 深圳市赛格导航科技股份有限公司 | On-vehicle navigation equipment, on-vehicle drunken driving detecting device and method, safe driving service system and method for vehicle |
| CN102214385A (en) * | 2010-04-02 | 2011-10-12 | 深圳市赛格导航科技股份有限公司 | Vehicle-mounted device for detecting drunk driving and use method thereof for detecting drunk driving |
| CN102029909A (en) * | 2010-12-06 | 2011-04-27 | 无锡文美科技有限公司 | Intelligent traffic safety system for avoiding drunk driving |
| CN102029909B (en) * | 2010-12-06 | 2015-10-21 | 无锡文美科技有限公司 | A kind of Intelligent traffic safety system for avoiding drunk driving |
| CN102279243A (en) * | 2011-05-10 | 2011-12-14 | 惠州Tcl移动通信有限公司 | System and method for prompting alcohol information inside car through mobile terminal |
| CN102279243B (en) * | 2011-05-10 | 2014-04-09 | 惠州Tcl移动通信有限公司 | Method and system for detecting alcohol inside car |
| CN102642509A (en) * | 2012-04-18 | 2012-08-22 | 邱柏康 | Embedding vehicle networking device and communication control method thereof |
| CN102642509B (en) * | 2012-04-18 | 2014-11-26 | 邱柏康 | Embedding vehicle networking device and communication control method thereof |
| CN104544985A (en) * | 2015-01-30 | 2015-04-29 | 林启东 | Drunk-driving preventive dining table device and method for controlling same |
| CN104597231A (en) * | 2015-01-30 | 2015-05-06 | 林启东 | Desktop drunk driving prevention device and control method thereof |
| CN104597231B (en) * | 2015-01-30 | 2016-05-18 | 林启东 | A kind of anti-drunk driving device of desktop and control method thereof |
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