[0037] The invention provides a car navigation device with an alcohol detection function. With the car navigation device, the driver does not need to carry an alcohol detector, and does not need to breathe against the detector for three seconds to automatically detect the alcohol content in the car. And after detecting that the alcohol content exceeds the limit, it can automatically send out a voice prompt to remind the driver not to drive after drinking. In addition, after detecting that the alcohol content exceeds the limit, the car navigation device can also notify the back-end service center, and the service center can promptly give kind reminders and provide corresponding services. Can effectively reduce the number of drunk driving.
[0038] figure 1 It is a schematic structural diagram of a car navigation device with alcohol detection function according to an embodiment of the present invention. Such as figure 1 As shown, the car navigation device 100 includes: a control module 110, a wireless communication module 120, a satellite navigation and positioning module 130, an alcohol detection module 140, an exhaust fan 142, a voice module 144, a speaker 150 and a microphone 160. Among them, the wireless communication module 120, the satellite navigation and positioning module 130, the alcohol detection module 140, the voice module 144, the speaker 150, and the microphone 160 are respectively connected to the control module 110 in signal.
[0039] In addition to the traditional navigation and route search functions, the car navigation device of the present invention also adds new functions such as alcohol detection and communication functions. In addition, a display module (not shown in the figure) can be provided on the car navigation device to show the user the navigation path.
[0040] The exhaust fan 142 is preferably configured to suck air near the driving position in the vehicle to the alcohol sensor probe in the alcohol detection module. In other embodiments, the exhaust fan may not be configured.
[0041] The satellite navigation and positioning module 130 is used to receive satellite navigation and positioning signals, which are processed by the control module 110 to generate positioning information. For example, the satellite navigation and positioning module 130 may be used to receive satellite navigation and positioning signals of the GPS positioning system, Beidou satellite navigation and positioning, or Galileo satellite navigation and positioning system. The wireless communication module 120 may communicate (such as short message and voice communication) with a remote wireless communication device based on a wireless communication protocol (such as GSM, CDMA, or GPRS) to transmit or exchange information.
[0042] In the car navigation device with alcohol detection function of the present invention, the control module 110, the wireless communication module 120, the satellite navigation and positioning module 130, the alcohol detection module 140, the exhaust fan 142, the voice module 144, the speaker 150, the microphone 160 and the display The modules are all installed on a chassis, that is, the alcohol detection and wireless communication functions are integrated on the traditional car navigation equipment. This implementation makes the car navigation equipment more powerful and brings convenience to users. Since the alcohol detection module is integrated on the casing of the car navigation device, it does not need to be separately installed, which reduces the installation cost and does not cause damage to the original facilities or decorations in the car.
[0043] The functions/functions of other parts of the car navigation equipment of the present invention will be combined later figure 2 with image 3 Give a detailed description.
[0044] figure 2 It is a schematic structural diagram of an alcohol detection module in a car navigation device with an alcohol detection function according to an embodiment of the present invention. Such as figure 2 As shown, the alcohol detection module 140 includes an alcohol sensor 142 and a signal amplifier 144 connected to it for detecting the alcohol content in the vehicle.
[0045] Due to the large enclosed space in the car and the low alcohol content in the air, it is difficult for the general sensor structure to detect the alcohol content in the air. In a preferred embodiment of the present invention, the airflow in the car is sucked near the probe of the alcohol sensor by an exhaust fan, and then the weak signal detected by the alcohol sensor is amplified by the signal amplifier, and then the amplified signal is transferred to the control Module for processing.
[0046] image 3 It is a schematic structural diagram of a control module in a car navigation device with an alcohol detection function according to an embodiment of the present invention. Such as image 3 As shown, the control module 110 includes a processor 112, a sampling module 114, a memory 116, and an interface module 118. The processor 112 includes a judgment module 112a, and the interface module 118 includes a satellite navigation and positioning module interface 118a, a communication module interface 118b, a voice module interface 118c, an audio I/O interface 118d, and a display module interface 118e.
[0047] The sampling module (114) is used to receive alcohol content information from the alcohol detection module; the memory (116) is used to store the detection threshold of excessive alcohol content; the judgment module (112a) is used to determine the alcohol content by comparison based on the alcohol content information and the detection threshold Whether the content exceeds the detection threshold. In one embodiment, when it is determined that the alcohol content exceeds a predetermined threshold, the control module sends a trigger signal to the voice module through the voice module interface 118c, and drives the voice module to output a voice signal to the speaker 9 (for example, output reminding the driver "please don't drive after drinking" Voice). In another embodiment, the control module prompts the alcohol content by voice after analyzing and judging the alcohol content information. In another embodiment, if the alcohol content exceeds the limit, the control module sends a trigger signal to the voice module through the voice module interface 118c, and at the same time sends alarm information and positioning information to the communication module through the communication module interface 118b to send this out.
[0048] In the embodiment of the present invention, the control module can be implemented using a single-chip microcomputer, a microprocessor, and the like.
[0049] In an embodiment, the sampling module includes an AD conversion module, which samples the detection signal passing through the signal amplifier.
[0050] Alternatively, in order to prevent false alarms, the voice module controls the speaker to only broadcast three times each time the alcohol content is detected to be excessive. In order to further reduce false alarms, the present invention also adds the manual interactive judgment service function of the background service center.
[0051] The control module always accepts the position information transmitted from the satellite navigation and positioning module, but does not send it to the background service center to save traffic. Only when the control module determines that the alcohol content exceeds the limit (as a trigger condition), the location information and alarm information will be automatically transmitted to the background service center through the wireless communication channel.
[0052] Figure 4 It is a schematic structural diagram of an automobile safe driving service system according to an embodiment of the present invention. Such as figure 2 As shown, the car safety driving service system includes a car navigation device 100 and a background service center 210. Among them, the car navigation device 100 and the background service center 210 are communicatively connected through a wireless communication channel 122. The in-vehicle navigation device 100 is used to send alarm information and satellite navigation positioning information to a background service center through a wireless communication channel when the alcohol content detection result in the vehicle exceeds the limit, so that the background provides corresponding safe driving services.
[0053] Figure 5 It is a schematic diagram of the power supply configuration of a car navigation device with an alcohol detection function according to an embodiment of the present invention. Such as Figure 5 As shown, in an embodiment of the present invention, the power supply configuration of the car navigation device is as follows: the car power supply module supplies power to the exhaust fan, the voice module and the horn; in order to reduce the influence of the voltage disturbance of the car power supply module, a dry battery is used as the alcohol sensor and signal The amplifier and the microcontroller are powered. The detection circuit is used to detect the state of the car ACC/door, and can also be used to set the detection threshold.
[0054] Image 6 It is a flow chart of the steps of a method 600 for car safe driving service according to an embodiment of the present invention. Such as Image 6 As shown, the step flow of the car safe driving service method according to an embodiment of the present invention starts at step 610, and then proceeds to step 612. The alcohol detection module detects the alcohol content in the gas near the driving position of the car, and compares the detected alcohol content The information is sent to the control module; in step 614 the control module receives the detected alcohol content information; in step 616, the control module compares the alcohol content information with the detection threshold stored in the memory to determine whether the alcohol content exceeds the limit; in step 616 When it is judged that the alcohol content exceeds the detection threshold when the alcohol content exceeds the limit, step 618 is entered, and the control module outputs a control signal to drive the voice module to output a voice signal to the speaker. After that, the process ends in step 620.
[0055] When it is determined in step 616 that the alcohol content does not exceed the limit, the flow of the method 600 ends in step 620.
[0056] In the embodiment of the present invention, the starting step 610 may be started due to the ignition of the car. When the car is ignited, the car navigation equipment is powered on. When the car navigation equipment is started, the satellite navigation and positioning module and the alcohol detection module are started at the same time, the satellite navigation and positioning module is used for positioning, and the alcohol detection module is used for detecting the alcohol content in the car.
[0057] Figure 7 It is a flow chart of the steps of a method 700 for car driving safety service according to another embodiment of the present invention. Such as Figure 7 As shown, the safe driving service method 700 of a car according to another embodiment of the present invention goes from step 710 to step 718 and Image 6 Steps 610 to 618 in the method 600 for car safe driving service shown are the same, and will not be repeated here. After step 716, it also includes step 722. The control module sends alarm information to the background service center through the wireless communication module and the current position information of the car determined based on the satellite navigation positioning signal received by the satellite navigation positioning module; in step 724, when the service After receiving the alarm information, the center interacts with the vehicle navigation equipment to verify the authenticity/accuracy of the alarm information. In step 726, if the alarm information is accurate, proceed to step 728, and the background service center initiates follow-up services, which include providing safe driving services (relevant information will be described later). Step 730, when the subsequent service is completed, enter the end step 740.
[0058] When it is determined in step 716 that the alcohol content does not exceed the limit, the flow of the method 700 ends in step 740. When it is determined in step 726 that the alarm information is incorrect, the flow of the method 700 ends in step 740.
[0059] In the embodiment of the present invention, the starting step 710 may be started due to the ignition of the car. When the car is ignited, the car navigation equipment is powered on. When the car navigation device is started, the satellite navigation and positioning module and the alcohol detection module are started at the same time, the satellite navigation and positioning module is used for positioning, and the alcohol detection module is used for detecting the alcohol content in the car.
[0060] As an embodiment, the method for judging the accuracy of the alarm information of the present invention includes: after the background service center receives the alarm information, it sends an instruction to the car navigation device to instruct it to turn on the car camera device to capture real-time images of the driving position, and to display the driving position in real time. The bit image is sent back to the back-end service center, and the image processing module of the back-end service center performs image processing, comparison, analysis, and identification to determine the driver’s status and determine the accuracy of the alarm information.
[0061] As another embodiment, the method for judging the accuracy of alarm information of the present invention includes: after receiving the alarm information, the background service center initiates a voice dialogue communication with the car navigation device, requesting a dialogue with the driver, and interacting with the driver in the process of dialogue In the process, the voice processing module of the back-end service center processes, compares, analyzes, and discriminates the received voice signals to determine the driver’s status and determine the accuracy of the alarm information.
[0062] In one embodiment of the present invention, the car’s safe driving service includes when the car’s ignition is activated and before the driver engages in gear/steps on the accelerator, if the alcohol content in the car is detected to exceed the detection threshold, an alarm message will be issued. After confirming that the alarm information is accurate , The back-end service center provides manual driving services for the users of the car.
[0063] In another embodiment of the present invention, the car’s safe driving service includes when the car’s ignition is activated, before the driver engages in gear/steps on the accelerator, if the alcohol content in the car is detected to exceed the detection threshold, an alarm message is issued, and the alarm information is confirmed to be accurate Later, the control module of the car navigation device or the back-end service center can immediately send a control signal to cut off the car's circuit/oil circuit to prohibit the driver from driving while drunk. In this case, the control module of the car navigation device
[0064] In another embodiment of the present invention, the car is equipped with a computerized automatic driving system, and the car’s safe driving service includes when the car’s safe driving service includes when the car’s ignition is activated, before or after the driver engages in gear/depresses the accelerator (that is, during driving) ), if it is detected that the alcohol content in the car exceeds the detection threshold, the control module of the car navigation device or the background service center can immediately start the computer automatic driving system. In this case, the control module of the car navigation device must be connected to the computer autopilot system.
[0065] In another embodiment, the process of the service method for car driving safety of the present invention includes:
[0066] 1. When the car is ignited, the car navigation equipment will be powered on;
[0067] 2. When the system is started, the satellite navigation and positioning module and the alcohol detection module are activated at the same time, the satellite navigation and positioning module is used for positioning, and the alcohol detection module is used for detecting the alcohol content in the car;
[0068] 3. When the alcohol detection module detects that the alcohol content in the closed air in the car exceeds the limit, it will send this information to the control module, and the latter will activate the voice module to remind the driver "please don't drive after drinking";
[0069] 4. The control module always accepts the position information transmitted from the satellite navigation and positioning module, but does not send it to the background service center to save traffic. Only when the control module determines that the alcohol content exceeds the limit (as a trigger condition), the location information and alarm information will be automatically transmitted to the background service center through the wireless communication channel.
[0070] 5. After receiving the alarm information, the seat staff of the back-end service center will start a manual dialogue through the communication module, on the one hand, confirm whether the driver is drinking, on the other hand, provide the driver with corresponding services such as driving on behalf of the driver.
[0071] The invention is based on active alcohol measurement. In the vehicle environment, the alcohol content can be automatically detected without the driver exhaling into the exhalation tube, and the driver can be automatically voiced. At the same time, the information (the alcohol content in the vehicle exceeds the detection threshold and the vehicle location information) can also be reported to the service center.
[0072] Because the present invention actively detects the alcohol content in the air to determine whether the driver is drinking. The enclosed space in the car is large, and the content of alcohol molecules in the gas is completely caused by the volatilization of the driver's body fluids. Therefore, the alcohol content in the enclosed space in the car is extremely low, which makes detection difficult and increases the probability of false alarms. The invention integrates an alcohol content detection module and a communication module on a traditional car navigation system, and sends the alcohol content detection result to the background service center through the communication module, and then takes corresponding service measures.
