JP3897946B2 - Emergency information transmission system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an emergency information transmission system that transmits emergency information to the outside when an emergency such as an accident occurs while driving a vehicle.
[0002]
[Prior art]
Recently, an in-vehicle emergency information transmission system that transmits emergency information to inform the outside when an emergency situation occurs, such as when an accident is encountered while driving a vehicle or a burglar is attacked. Has been realized and is popular in the United States and other countries. In such an emergency information transmission system, a transmission switch for transmitting emergency information is installed, for example, in an inconspicuous place on the driver's seat side, and this transmission is performed when an emergency situation as described above occurs. By pressing the trust switch, emergency information including the current location information of the vehicle and a specific message for notifying the occurrence of an emergency situation is sent to an external information center using a mobile communication means such as a mobile phone. Sent to. The information center that has received the emergency information can quickly take action such as requesting the police or rescue team to be dispatched based on the current position information of the vehicle, the message content, and the like.
[0003]
[Problems to be solved by the invention]
By the way, in the conventional emergency information transmission system described above, in order to transmit emergency information to the outside, it is necessary to press a transmission switch installed at a predetermined position around the driver's seat. If a situation occurs in which the driver's limbs are restrained by deformation of the vehicle, the transmission switch cannot be pressed, and emergency information may not be transmitted. In addition, in the case of being attacked by a burglar or the like, it is often difficult to press the transmission switch without noticing the other party (the burglar or the like), and there is a possibility that the emergency information cannot be transmitted after all.
[0004]
In addition, the transmission switch is generally installed in an inconspicuous area within the reach of the driver's seat as described above in consideration of the case of being attacked by a robber or from the viewpoint of preventing erroneous operation. Therefore, in a situation where the driver is injured and it is difficult to move when an accident occurs, it is very difficult for the passenger in the passenger seat or the rear seat to press the transmission switch instead. For this reason, when an accident or the like occurs, there is a problem that emergency information cannot be transmitted even if a passenger other than the driver is in the passenger seat or the rear seat.
[0005]
The present invention was created in view of the above points, and an object of the present invention is to provide an emergency information transmission system capable of transmitting emergency information even in a situation where the transmission switch cannot be pressed. It is to provide.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problem, in the emergency information transmission system of the present invention, voice recognition processing is performed on the input voice by the voice recognition processing means, and the content of the recognized input voice includes a predetermined keyword. Is detected by the keyword detecting means, and when a predetermined keyword is detected, emergency information including the current position of the vehicle detected by the vehicle position detecting means is transmitted by the emergency information transmitting means. As described above, since the voice recognition process is performed to detect whether or not the predetermined keyword is included in the content of the input voice, the predetermined keyword can be used even in a situation where the transmission switch cannot be pressed. The emergency information including the current position of the vehicle can be transmitted simply by speaking.
[0007]
In addition, the emergency information transmitting means described above further includes specific speaker determination means for determining whether or not the input voice is emitted by a specific speaker registered in advance based on the input voice. It is desirable to transmit emergency information when it is determined by the speaker determination means that the input voice is uttered by a specific speaker and the above-mentioned keyword is included in the input voice. A word that coincides with a keyword accidentally during a conversation by another speaker who does not know the content of the above-mentioned predetermined keyword by determining whether the input speech is made by a specific speaker It is possible to prevent unnecessary urgent information from being transmitted in the case of issuing a message.
[0008]
The sound collecting means further includes a sound collecting means capable of changing the sound collecting range, and a state judging means for judging an abnormal state of the vehicle. When the abnormal state is detected by the state judging means, the sound collecting range by the sound collecting means is changed. It is desirable to set a wide range. In this way, when an abnormal state occurs in the vehicle, the emergency information is transmitted from any position such as a passenger seat or a rear seat in the vehicle by setting a wide sound collection range by the sound collecting means. You can enter keywords.
[0009]
In particular, the state determination means described above is preferably a shock sensor that detects abnormal vibration applied to the vehicle. By detecting abnormal vibrations applied to the vehicle, it is possible to reliably detect the occurrence of an accident and set a wide sound collection range. For example, even if the passenger in the driver's seat loses consciousness, Emergency information can be transmitted when another passenger such as a seat or a rear seat speaks a predetermined keyword.
[0010]
Further, the keyword detecting means described above detects a second keyword instructing cancellation of transmission of emergency information different from the keyword together with the keyword detecting operation, and the emergency information transmitting means described above detects an emergency after detecting the keyword. Before transmitting the information, it is desirable to stop the emergency information transmission operation when the second keyword is detected by the keyword detection means. As a result, even when a keyword for instructing the transmission of emergency information is mistakenly spoken in daily conversation, the emergency information transmission operation can be easily stopped by just speaking the second keyword.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an in-vehicle emergency information transmission system according to an embodiment to which the present invention is applied will be described with reference to the drawings.
[0012]
FIG. 1 is a diagram illustrating a configuration of an emergency information transmission system according to an embodiment. The emergency information transmission system 100 shown in the figure includes an emergency information transmission device 1 that transmits emergency information to the outside when an emergency such as an accident occurs while driving the vehicle, and a predetermined area around the driver's seat in the vehicle. Connected to the emergency information transmitting apparatus 1 via an external data input / output unit provided in the telephone body and an external data input / output unit provided in the telephone body, and a microphone 2 that collects voices uttered by a user and converts them into electrical signals. The mobile phone 3 for transmitting emergency information output from the emergency information transmitting device 1 to the ground station in the vicinity of the own vehicle, and detecting a current position of the vehicle and displaying a map image around the own vehicle position. Or a navigation device 4 that performs route search and route guidance to a destination selected by the user.
[0013]
1 includes an operation unit 10, an amplifier 12, a voice recognition unit 14, a voice recognition dictionary storage unit 16, a keyword determination unit 18, a keyword storage unit 20, a specific speaker determination unit 22, and a feature amount storage. 24, a control unit 26, a communication control unit 28, a shock sensor 30, a transmission switch 32, a backup power source 34, a GPS receiver 36, a display unit 38, an audio output unit 40, and a speaker 42.
[0014]
The operation unit 10 is used by the user to give various instructions to the emergency information transmitting apparatus 1. For example, in this embodiment, an emergency information transmission operation or cancellation operation is performed when a user utters a keyword registered in advance, and a registration instruction for these keywords is performed using the operation unit 10. .
[0015]
The amplifier 12 amplifies the audio signal output from the microphone 2 with a predetermined gain. The gain when the amplifier 12 amplifies the audio signal is set by the control unit 26. For example, normally, the gain is set such that only the voice of the person (driver) who gets on the driver's seat is collected, and the voice of other passengers such as the passenger seat is hardly collected. As will be described later, when a detection signal is output from the shock sensor 30, the gain of the amplifier 12 is set to a high value so that the sound of other passengers such as the passenger seat is also collected. . Thus, in this embodiment, the sound collection range by the microphone 2 is changed by variably controlling the gain value of the amplifier 12.
[0016]
The voice recognition unit 14 performs voice recognition processing on the voice signal collected by the microphone 2 and amplified by the amplifier 12 to specify a character string corresponding to the voice uttered by the user. The speech recognition dictionary storage unit 16 stores a signal waveform corresponding to standard speech as a dictionary for speech recognition.
[0017]
The keyword determination unit 18 determines whether or not the character string (recognized character string) specified by the voice recognition unit 14 corresponds to a specific keyword for instructing transmission of emergency information stored in the keyword storage unit 20. When a positive determination result is obtained, the control unit 26 is instructed to transmit predetermined emergency information. Further, the keyword determination unit 18 determines whether or not the recognized character string output from the voice recognition unit 14 corresponds to a specific keyword for instructing to stop transmission of emergency information stored in the keyword storage unit 20. If a positive determination result is obtained, the control unit 26 is instructed to stop the emergency information transmission operation.
[0018]
FIG. 2 is a diagram illustrating an example of the specific keyword stored in the keyword storage unit 20. In the present embodiment, the situation in which emergency information is transmitted includes two cases: (1) when a traffic accident occurs, and (2) when a robber attacks, and keywords A and B corresponding to each are It is stored in the keyword storage unit 20. Then, when a traffic accident occurs (in the case of (1)), the keyword utterance unit 18 causes the keyword utterance unit 18 to utter a keyword A corresponding to this (for example, “pain, help” shown in FIG. 2). The control unit 26 is instructed to transmit emergency information including a message (for example, “accident occurrence”) for notifying the occurrence of a traffic accident. Similarly, when a user is uttered by a keyword B (for example, “Don't shoot me” shown in FIG. 2) corresponding to a robbery attack (in the case of (2)), a keyword determination unit 18 instructs the control unit 26 to transmit emergency information including a message (for example, “robbery occurred”) notifying that a robbery has been attacked.
[0019]
By the way, the specific keyword instructing the transmission of emergency information is set in advance by the user. Therefore, the user can almost prevent the transmission of unnecessary emergency information by selecting and setting words that are rarely spoken in daily conversation as specific keywords. Also, assuming a case of being attacked by a robber, etc., select words (such as “Don't shoot” mentioned above) that cannot be noticed by the other party as the specific keyword. It is desirable to set them.
[0020]
In addition, since words included in everyday conversation may accidentally fall under a specific keyword that instructs the transmission of emergency information, unnecessary emergency information may be transmitted. In the form, a specific keyword for instructing to cancel such a transmission operation is set. The keyword storage unit 20 also stores a keyword C that instructs to stop the transmission operation. As the keyword C for instructing to stop transmission of emergency information, for example, a word such as “transmission stop” may be set as shown in FIG. When the user utters the keyword C corresponding to the transmission operation when the transmission operation is stopped, the keyword determination unit 18 instructs the control unit 26 to stop the transmission of the emergency information. The keyword C corresponds to the “second keyword” described above. The details of the procedure for registering the above three types of keywords A, B, and C will be described later.
[0021]
Based on the audio signal output from the amplifier 12, the specific speaker determination unit 22 determines whether or not the audio signal corresponds to a specific user (specific speaker) set in advance. . Specifically, a predetermined feature amount (eg, voice pitch, utterance interval, etc.) is extracted in advance based on an audio signal corresponding to a specific speaker, and stored in the feature amount storage unit 24. The speaker determination unit 22 extracts the feature amount of the voice based on the voice signal output from the amplifier 12 and compares this value with the value stored in the feature amount storage unit 24 to thereby determine the specific speaker. It is determined whether or not. Note that the voice feature quantity stored in the feature quantity storage unit 24 is, for example, purchased when the emergency information transmission system 100 of the present embodiment is purchased or a vehicle on which the emergency information transmission system 100 is installed. At this time, it is assumed that registration processing is performed in accordance with a user instruction. In addition, the feature quantity stored in the feature quantity storage unit 24 may be updated every time voice recognition processing is performed.
[0022]
The control unit 26 controls the entire emergency information transmitting apparatus 1 such as transmission of emergency information, setting of a specific keyword, setting of a feature amount necessary for determining a specific speaker, and the like. For example, when the keyword determination unit 18 gives an instruction to transmit emergency information and the specific speaker determination unit 22 determines that the input voice corresponds to the specific speaker, the control unit 26 Information on the current position (latitude, longitude, etc.) is acquired from the navigation device 4, and emergency information data including the current position is output to the communication control unit 28. The communication control unit 28 converts the emergency information data input from the control unit 26 into a predetermined communication format and outputs it to the mobile phone 3. As a result, predetermined emergency information is transmitted to an external information center or the like via the mobile phone 3. In the present embodiment, the current position of the host vehicle obtained by the map matching process or the like is acquired by the navigation device 4, and the correct current position of the host vehicle is included in the emergency information and transmitted. be able to.
[0023]
The shock sensor 30 is realized by, for example, an acceleration sensor or the like, and detects an abnormal vibration that occurs when an excessive shock that is not applied during normal traveling is applied to the vehicle due to an accident or the like, and a detection signal Is output to the control unit 26. As described above, when a detection signal is input from the shock sensor 30, the control unit 26 changes the sound collection range by the microphone 2 by setting the gain of the amplifier 12 to be high so that the passenger seat, the rear seat, etc. Allow the passengers to collect the voice generated. In addition, when a detection signal is input from the shock sensor 30 and an emergency information transmission instruction is output from the keyword determination unit 18, the control unit 26 is predetermined regardless of the determination result by the specific speaker determination unit 22. The emergency information transmission operation is performed. Therefore, when an abnormal state occurs in the vehicle due to an accident or the like, a specific keyword for transmitting emergency information can be input from any position of the passenger seat or the rear seat in the vehicle.
[0024]
The transmission switch 32 is a push button switch for issuing an emergency information transmission instruction, and is installed in an inconspicuous position within the reach of the driver's seat. When the transmission switch 32 is pressed by the user, a signal to that effect is output to the control unit 26 and an emergency information transmission operation is immediately started.
[0025]
The backup power supply 34 is an emergency information transmission device when power supply from a battery (not shown) mounted on the vehicle is stopped due to an accident or when a connection line between the battery and the battery is disconnected due to burglary or the like. Power is supplied to each part of 1. By providing this backup power supply 34, even when the power supply from the battery is stopped, the operating state of the emergency information transmitting apparatus 1 can be maintained, so that the emergency information can be reliably transmitted.
[0026]
The GPS receiver 36 receives radio waves transmitted from a plurality of GPS satellites, performs a three-dimensional positioning process or a two-dimensional positioning process, and calculates the absolute position and direction of the vehicle (the vehicle direction is determined by the current vehicle). Calculated based on the position and the vehicle position before one sampling time ΔT), and outputs them to the navigation device 4 together with the positioning time.
[0027]
The display unit 38 displays an operation status and the like by the user, and is configured by, for example, a liquid crystal display device (LCD). The audio output unit 40 generates an analog audio signal based on the audio data input from the control unit 26 and outputs the analog audio signal to the speaker 42. For example, when registering a specific keyword for transmitting emergency information, voice data corresponding to a recognized character string specified by the voice recognition unit 14 is output from the control unit 26, and a voice signal corresponding to the voice data is output. Is generated by the audio output unit 40. The speaker 42 performs audio output based on the audio signal input from the audio output unit 40.
[0028]
1 includes a DVD reading device 50, a data buffer 52, an autonomous navigation sensor 54, a vehicle position calculation unit 56, a navigation operation processing unit 58, and a display device 60.
[0029]
The DVD reading device 50 reads map data recorded on a DVD (not shown) based on a data reading request from the navigation operation processing unit 58. The map data read by the DVD reader 50 is stored in the data buffer 52.
[0030]
The autonomous navigation sensor 54 includes an angle sensor such as a vibration gyro that detects a vehicle rotation angle as a relative direction, and a distance sensor that outputs one pulse for each predetermined travel distance, and determines the relative position and direction of the vehicle. Detected and output to the vehicle position calculator 56. The vehicle position calculation unit 56 calculates the own vehicle position based on the detection data of the autonomous navigation sensor 54 and the GPS receiver 36 in the emergency information transmitting apparatus 1, and the calculated own vehicle position is a road of map data. If not, map matching processing for correcting the vehicle position is performed, and information on the current position of the vehicle is output to the navigation operation processing unit 58.
[0031]
The navigation operation processing unit 58 performs a predetermined navigation operation. For example, the navigation operation processing unit 58 reads out map data of a predetermined range around the own vehicle from the data buffer 52 based on the current position data of the own vehicle output from the own vehicle position calculating unit 56, and Drawing data for displaying the map information, vehicle position mark, etc. is created. In addition, when the route is being guided, the navigation operation processing unit 58 also creates drawing data for displaying the guide route obtained in advance on the map information or displaying an enlarged view of the intersection when passing the intersection. To do. The display device 60 displays a predetermined navigation image (such as map information) based on the drawing data output from the navigation operation processing unit 58.
[0032]
The GPS receiver 36, the autonomous navigation sensor 54, and the vehicle position calculation unit 56 described above are used as vehicle position detection means, the voice recognition unit 14 and the voice recognition dictionary storage unit 16 are used as voice recognition processing means, the keyword determination unit 18, and the keyword storage unit. Reference numeral 20 corresponds to the keyword detection means, and the mobile telephone 3, the control unit 26, and the communication control unit 28 correspond to the emergency information transmission means. Further, the specific speaker determination unit 22 and the feature amount storage unit 24 correspond to specific speaker determination means, the microphone 2 and the amplifier 12 correspond to sound collection means, and the shock sensor 30 corresponds to state determination means.
[0033]
The emergency information transmission system 100 of the present embodiment has such a configuration, and the operation thereof will be described next. First, a procedure for setting a specific keyword for instructing transmission of emergency information will be described. FIG. 3 is a flowchart showing a procedure for registering a specific keyword.
[0034]
The control unit 26 determines whether or not the user has operated the operation unit 10 to give an instruction to start registration of a specific keyword (step 100). To which type of specific keyword to set is selected (step 101). As shown in FIG. 2 described above, in this embodiment, the specific keyword is (1) when a traffic accident occurs, (2) when attacked by a robber, etc. (3) when the emergency information transmission operation is stopped. These are classified and stored in three types. Therefore, for example, the control unit 26 causes the user to select the type of the specific keyword by displaying “A: accident, B: robbery, C: transmission stop” or the like on the screen of the display unit 38. This selection operation may be performed by, for example, pressing a cursor key provided on the operation unit 10 to move the cursor displayed on the screen of the display unit 38, and the operation unit 10 includes an alphabet key. Alternatively, it may be performed by causing the user to press any alphabetic key.
[0035]
When the type of the specific keyword is selected and a voice corresponding to the specific keyword is input to the microphone 2, the control unit 26 acquires a recognition character string output from the voice recognition unit 14 corresponding to the input voice. (Step 102), image data and audio data corresponding to the recognized character string are output to the display unit 38 and the audio output unit 40, respectively. As a result, an image corresponding to the recognized character string is displayed on the display unit 38, and sound corresponding to the recognized character string is output from the speaker 42 (step 103).
[0036]
Next, the control unit 26 determines whether or not an instruction to register the recognized character string as a specific keyword has been given (step 104). Specifically, for example, the operation unit 10 includes a “registration button”, a “cancel button”, and the like, and the user issues a registration instruction by pressing the “registration button”. In addition, when the recognized character string that is displayed and output as an image is different from what the user intended, the user does not register the recognized character string as a specific keyword by pressing the “cancel button”. To that effect.
[0037]
If an instruction to register as a specific keyword is given, an affirmative determination is made in step 104, and the control unit 26 sets the recognized character string as a specific keyword belonging to the type selected in step 101 described above as the keyword storage unit 20. (Step 105).
[0038]
Next, the control unit 26 determines whether or not an instruction to end registration of the specific keyword has been given (step 106). When the registration end instruction is given, the control unit 26 ends the registration operation of the specific keyword. If the registration end instruction is not given, the process returns to step 101 described above, and the operations after the process of selecting the type of the specific keyword are repeated.
[0039]
If an instruction to not register as a specific keyword is given, a negative determination is made in step 104 described above, and the control unit 26 proceeds to step 106 without storing the recognized character string in the keyword storage unit 20. The operation after the determination whether or not an instruction to end the registration of the specific keyword has been made is performed.
[0040]
As described above, by executing the procedure shown in FIG. 3, the specific keyword arbitrarily set by the user is stored in the keyword storage unit 20 as shown in FIG. 2, and the registration of the specific keyword is performed. Done.
[0041]
Next, the operation of the emergency information transmission system 100 when transmitting emergency information according to a user instruction will be described. FIG. 4 is a flowchart showing an operation procedure of the emergency information transmission system 100 when transmitting emergency information. The operation in the control unit 26 in the emergency information transmission apparatus 1 is mainly described.
[0042]
The control unit 26 determines whether or not the transmission switch 32 is pressed by the user (driver) and an emergency information transmission instruction is issued (step 200). If the transmission instruction is not issued, a negative determination is made. Next, it is determined whether or not an excessive impact has been detected by examining the presence or absence of a detection signal from the shock sensor 30 (step 201). If an excessive impact is not detected, a negative determination is made in step 201, and then the control unit 26 determines whether or not an emergency information transmission instruction is output from the keyword determination unit 18 in response to the voice input. (Step 202). If the transmission instruction has not been output, the process returns to step 200 and the operations after the determination as to whether or not the transmission instruction has been made by pressing the transmission switch 32 are repeated.
[0043]
If an emergency information transmission instruction corresponding to voice input is output, an affirmative determination is made in step 202 described above, and the control unit 26 checks the signal output from the specific speaker determination unit 22. Thus, it is determined whether or not the speaker who uttered the specific keyword is a specific speaker registered in advance (step 203). When it is determined that the speaker is not a specific speaker (when a negative determination is made in step 203), the control unit 26 sends the transmission instruction output from the keyword determination unit 18 to the input voice by a person other than the specific speaker. It is determined that this is an unnecessary transmission instruction, and the process returns to step 200.
[0044]
When it is determined that the speaker is a specific speaker (when an affirmative determination is made in step 203), the control unit 26 determines whether or not an emergency information transmission stop instruction is output from the keyword determination unit 18. Determination is made (step 204). When a predetermined time (for example, 5 seconds) elapses without a transmission stop instruction being output (step 205), the control unit 26 performs a predetermined emergency information transmission operation (step 206). Specifically, the control unit 26 corresponds to the instruction given from the keyword determination unit 18, and includes emergency information data including a predetermined message corresponding to the type (A or B) of the specific keyword and the current position information of the own vehicle. And output to the communication control unit 28. As a result, predetermined emergency information is transmitted to the information center or the like via the mobile telephone 3.
[0045]
Further, if a transmission stop instruction is given from the keyword determination unit 18 before the predetermined time has elapsed (while a negative determination is made in step 205), an affirmative determination is made in step 204, and then control is performed. The unit 26 stops the transmission of the emergency information, returns to step 200, and repeats the operation after the determination as to whether or not a transmission instruction is made by pressing the transmission switch 32.
[0046]
If an excessive impact is detected, an affirmative determination is made in step 201 described above, and then the control unit 26 increases and sets the gain of the amplifier 12 by a predetermined value (step 207). Thereby, the sound collection range of the microphone 2 is set to be wide, and the sound uttered by the passenger in the passenger seat or the rear seat can be collected. Further, the control unit 26 determines whether or not an emergency information transmission instruction is output from the keyword determination unit 18 in response to the voice input (step 208). When the transmission instruction is output, the operations after step 204 described above are performed.
[0047]
If the transmission instruction corresponding to the voice input is not output, a negative determination is made in step 208, and the control unit 26 determines whether or not a predetermined time (for example, 5 minutes) has elapsed (step 5). 209). If the predetermined time has not elapsed, the control unit 26 returns to step 208 and repeats the operation after the determination of whether or not a transmission instruction has been output. If the predetermined time has elapsed, an affirmative determination is made in step 209, and the control unit 26 returns to step 200 and performs operations after determining whether or not a transmission instruction is issued by pressing the transmission switch 32. repeat.
[0048]
When an emergency information transmission instruction is issued by pressing the transmission switch 32 instead of an emergency information transmission instruction corresponding to voice input, an affirmative determination is made in step 200 described above, and then the control unit 26. Performs a predetermined emergency information transmission operation immediately without determining whether or not there is a transmission stop instruction in step 204 (step 206). In this case, since the cause of the emergency information is unknown, emergency information data including the current location information of the vehicle is created together with a predetermined message indicating that an emergency based on the cause has occurred, and communication control is performed. The corresponding emergency information is transmitted to the information center or the like via the mobile telephone 3.
[0049]
Thus, in the emergency information transmission system 100 of this embodiment, the specific keyword for performing the emergency information transmission instruction is set in advance and stored in the keyword storage unit 20, and the voice recognition process is performed on the input voice. When a specific keyword is included in the character string obtained by performing the operation, a predetermined message corresponding to the type of the specific keyword and emergency information including the current position of the host vehicle are transmitted. Therefore, even in a situation where it is impossible to press the transmission switch 32, it is possible to transmit predetermined emergency information simply by uttering a specific keyword. In addition, when it is determined whether or not the input voice is uttered by a specific speaker registered in advance, the input voice is uttered by the specific speaker and the input voice includes a specific keyword Because only certain emergency information is sent, it is unnecessary urgent even when another speaker who does not know the content of the specific keyword accidentally utters a word corresponding to the specific keyword during a conversation. Information can be prevented from being transmitted.
[0050]
Further, whether or not an excessive impact is applied to the vehicle is detected by the shock sensor 30. If an excessive impact is detected, the microphone value is increased by increasing the gain set in the amplifier 12. 2 is set wide and emergency information can be transmitted even if the input voice is not from a specific speaker, so that the driver's seat is injured when an accident occurs, etc. Even in difficult situations, emergency information can be transmitted by the passenger in the passenger seat or the rear seat speaking a specific keyword instead.
[0051]
In addition, this invention is not limited to the said embodiment, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, in the embodiment described above, the emergency information transmission system 100 is configured to include the navigation device 4, but the navigation device 4 may be omitted. In this case, the control unit 26 in the emergency information transmitting device 1 may acquire vehicle position information directly from the GPS receiver 36. By omitting the navigation device 4, the cost of the emergency information transmission system can be reduced.
[0052]
In the above-described embodiment, the sound collection range of the microphone 2 is changed by variably controlling the gain value of the amplifier 12, but the method of changing the sound collection range is not limited to this. Various other methods are conceivable. For example, the microphone 2 is installed not only in the vicinity of the driver's seat but also in a predetermined position in the vicinity of the passenger seat and the rear seat, and usually only the microphone 2 in the vicinity of the driver's seat is used, and an excessive shock is detected by the shock sensor 30. In such a case, the sound collection range may be changed by collecting sound using all the microphones 2. In addition, by controlling the directivity of the microphone 2, normally only the voice uttered from the vicinity of the driver's seat is collected, and when an excessive shock is detected by the shock sensor, it is detected from all the seats in the vehicle. The sound collection range may be changed by collecting sound to be uttered.
[0053]
In the embodiment described above, it is determined whether or not an accident has occurred by detecting an excessive impact applied to the vehicle by the shock sensor 30, but the method for determining whether or not an accident has occurred is limited to this. However, various other methods are conceivable. For example, when the engine is running, (1) if the transmission is an automatic transmission vehicle, the mission state is neither neutral (N) nor parking (P), or (2) if the transmission is a manual transmission vehicle, the mission state is It may be determined that an accident has occurred when the vehicle is not neutral (N) and the vehicle has been stopped for a predetermined time (for example, 60 seconds) or longer.
[0054]
Further, the voice recognition unit 14 and the specific speaker determination unit 22 described above may be combined into one functional block in an actual configuration. In general, when performing speech recognition processing, necessary processing such as detection of speech sections is performed by extracting various feature values from the input speech, but operations for extracting various feature values from this input speech are performed. Therefore, the configuration can be simplified by causing the speech recognition unit 14 to determine whether or not the speaker is a specific speaker.
[0055]
【The invention's effect】
As described above, according to the present invention, since voice recognition processing is performed to detect whether or not a predetermined keyword is included in the content of the input voice, it is impossible to press the transmission switch. Even in the situation, it is possible to transmit emergency information including the current position of the vehicle simply by speaking a predetermined keyword.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a configuration of an emergency information transmission system according to an embodiment.
FIG. 2 is a diagram illustrating an example of a specific keyword stored in a keyword storage unit.
FIG. 3 is a flowchart showing an operation procedure for registering a specific keyword.
FIG. 4 is a flowchart showing an operation procedure of the emergency information transmission system when transmitting emergency information.
[Explanation of symbols]
1 Emergency information transmitter
2 Microphone
3 Mobile phone
4 navigation devices
10 Operation part
12 amplifiers
14 Voice recognition unit
16 Voice recognition dictionary storage
18 Keyword judgment part
20 Keyword storage
22 Specific speaker determination unit
24 feature storage
26 Control unit
28 Communication control unit
30 Shock sensor
32 Transmission switch
34 Backup power supply
36 GPS receiver
54 Autonomous Navigation Sensor
56 Vehicle position calculator
100 Emergency information transmission system

Claims (4)

Vehicle position detection means for detecting the current position of the vehicle;
Speech recognition processing means for performing speech recognition processing on input speech;
Keyword detection means for detecting whether or not a predetermined keyword is included in the content of the input voice recognized by the voice recognition processing means;
Emergency information transmitting means for transmitting emergency information including the current position detected by the vehicle position detecting means when the keyword is detected by the keyword detecting means;
A sound collection means capable of changing a sound collection range and collecting the input sound;
State determining means for determining an abnormal state of the vehicle;
Wherein the state when the abnormal state is detected by the determination means, the emergency information transmitter system characterized that you set wide the sound collecting range by the sound collecting unit. In claim 1,
Based on the input speech, further comprising specific speaker determination means for determining whether or not the input speech is issued by a specific speaker registered in advance;
The emergency information transmission unit determines that the input voice is uttered by the specific speaker by the specific speaker determination unit, and the emergency information is transmitted when the keyword is included in the input voice An emergency information transmission system characterized by transmitting information. In claim 1,
The emergency information transmission system, wherein the state determination means is a shock sensor that detects abnormal vibration applied to the vehicle. In any one of Claims 1-3,
The keyword detection means detects a second keyword that instructs to cancel transmission of the emergency information different from the keyword together with the keyword detection operation,
The emergency information transmitting means transmits the emergency information when the second keyword is detected by the keyword detecting means before the emergency information is transmitted after the keyword is detected by the keyword detecting means. An emergency information transmission system characterized in that the operation is stopped.

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