JP4946469B2 - Speed detection program, position identification system, in-vehicle device, and speed detection method - Google Patents

Description

The present invention relates to an in-vehicle device mounted on a mobile body, and a portable end device that performs position specification by communicating with the in-vehicle device, and in particular, a speed detection program that provides speed information from the in-vehicle device to the portable terminal device, and the in-vehicle device The present invention relates to a speed detection program, a position specification system, an in-vehicle device, and a speed detection method for specifying a position using speed information acquired from the above.

  Conventionally, a vehicle navigation system in which a vehicle-mounted device is equipped with a GPS and provides route guidance to a destination has been widely used. Furthermore, in recent years, GPS has been implemented in mobile terminals such as mobile phones, and various services (for example, navigation for pedestrians, navigation for vehicles, and drive recorders) using position information on the mobile terminals can be provided.

  In addition, when the in-vehicle device and the mobile phone are connected and GPS information cannot be obtained by the in-vehicle device, the coordinates are obtained using the GPS function of the mobile phone, and the obtained coordinates are transmitted from the mobile phone to the in-vehicle device. A technique for providing a vehicle navigation service on the in-vehicle device side has also been devised (see, for example, Patent Document 1).

JP 2004-340633 A

  When using GPS to identify a position in an in-vehicle device, the current position is corrected using vehicle speed information, so that the position can be accurately identified even when it is difficult to locate by GPS, such as a shadow of a building with poor visibility or inside a tunnel. Can be performed.

  On the other hand, in order to perform correction based on vehicle speed information when a mobile terminal device provides a vehicle navigation or drive recorder service, it is necessary to connect to the in-vehicle device and acquire the vehicle speed information.

  Here, the vehicle speed on the vehicle side is generally detected by detecting a vehicle speed pulse generated in proportion to the rotational speed of the tire. The vehicle speed pulse is generated, for example, by 4 pulses per tire rotation, and becomes a continuous signal of about 40 Hz at 60 km / h.

  However, considering that the portable terminal always directly captures such a high frequency pulse signal, there is a problem that the processing load of the portable terminal increases and the power consumption also increases. Further, when the mobile terminal device and the vehicle-mounted device are connected by short-range wireless communication such as Bluetooth, the power consumption problem is further important because it is necessary to cover all power consumption with the mobile terminal.

  As described above, when a system configuration in which a mobile terminal and an in-vehicle terminal are linked is used in actual operation, the processing load and power consumption on the mobile terminal device side become problems. No serious problems were studied.

The present invention has been made to solve the above-described problems in the prior art, and speed for reducing processing load and power consumption in the mobile terminal device in position acquisition by the mobile terminal device in cooperation with the in-vehicle terminal device. It is an object to provide a detection program, a position specifying system , an in-vehicle device, and a speed detection method .

  In order to solve the above-described problems and achieve the object, the in-vehicle device and the speed detection program according to the present invention obtain a speed pulse indicating the moving speed of the moving body on which the in-vehicle device is mounted, and process load on the mobile terminal In consideration of the above, machining speed information that can be transmitted at a frequency equal to or less than the speed pulse period before machining is generated, and the machining speed information is transmitted to the portable terminal device.

  Further, in the mobile terminal device and the position specifying program according to the present invention, short-distance communication is performed with the in-vehicle device mounted on the mobile body, the speed information processed by the in-vehicle device is acquired, and the mobile body information is processed from the processed speed information. The moving speed is determined, and the position of the moving body is specified using the obtained moving speed.

  According to the present invention, the in-vehicle device and the speed detection program acquire a speed pulse indicating the moving speed of the moving body on which the in-vehicle device is mounted, process the speed pulse in consideration of the processing load on the mobile terminal, and before processing. The processing speed information that can be transmitted at a frequency equal to or less than the speed pulse period is generated, and this processing speed information is transmitted to the mobile terminal device, so that the processing load required when the mobile terminal device receives the speed information is reduced, There exists an effect that the vehicle-mounted apparatus and speed detection program which reduce power consumption can be obtained.

  Here, if the processing speed information is created by thinning out the speed pulse and adding information on the thinning processing, the processing speed information can be easily created and the load on the mobile terminal device can be efficiently reduced. I can do it.

  Furthermore, if the thinning rate of the thinning process is changed based on the speed of the moving body and the processing speed information is created, the speed information can be transmitted to the portable terminal device with the processing content adapted to the change in speed.

  Further, if the speed pulse period is a predetermined value or more and the thinning process is selectively performed, the speed pulse period is long, and when the load of the mobile terminal device is small, the speed pulse is transmitted as it is, It is possible to reduce the load required for processing the speed information in the in-vehicle device and the mobile terminal device.

  Furthermore, if information other than the speed related to the movement of the moving body, for example, the steering operation state, the direction of the vehicle, the acceleration change, etc. is further transmitted, the portable terminal device uses these information to increase the position specifying accuracy. I can do it.

  Also, if processing content specification is received from the mobile terminal and processing speed information is created based on the specification, the transmission frequency of the speed information can be changed according to the processing load of the mobile terminal device.

  Further, in the mobile terminal device and the position specifying program according to the present invention, short-distance communication is performed with the in-vehicle device mounted on the mobile body, the speed information processed by the in-vehicle device is acquired, and the mobile body information is processed from the processed speed information. Since the moving speed is determined and the position of the moving body is specified using the obtained moving speed, the position specification using the speed information is performed with a low processing load and low power consumption compared with the case of directly receiving the vehicle speed pulse. There is an effect that a portable terminal device and a position specifying program that can be performed can be obtained.

  Here, the processed speed information is created from speed pulses indicating the moving speed of the moving body, and is transmitted from the in-vehicle device at a frequency equal to or less than the speed pulse cycle before processing in consideration of the processing load on the mobile terminal. Information.

  In addition, if the processed speed information is information created by thinning out pulses and adding information related to the thinning processing, the mobile terminal device can easily restore the original speed information.

  Moreover, if it is set as the structure which transmits the process request which designates the processing content of speed information with respect to a vehicle-mounted apparatus, speed information can be received with the frequency adapted to the condition of the processing load of a portable terminal device.

  For example, a processing request may be transmitted as a processing request that gives an instruction to change the speed pulse thinning interval in accordance with the speed of the moving object indicated by the processed speed information acquired in the receiving step and the speed information reception interval.

  Moreover, the obtained speed information can be used for specifying the position of the moving body by using it for correcting the coordinate information calculated by the GPS.

  Here, the GPS coordinate information can also be acquired from the in-vehicle device. In this case, coordinate information and speed information are acquired from an in-vehicle device having GPS, and the position of the moving body is specified by correcting the coordinate information with the speed information.

  The speed information acquired from the in-vehicle device can also be used for specifying the position of the moving body by so-called map matching combined with map information.

  Exemplary embodiments of a speed detection program, a position specifying program, an in-vehicle device, and a mobile terminal device according to the present invention will be described below in detail with reference to the accompanying drawings.

1. First, an overview of the present invention will be described with reference to FIG. In the present invention, the in-vehicle device 2 mounted on the vehicle and the mobile terminal 1 possessed by the user (for example, a driver) are connected by communication, and the mobile terminal 1 uses the vehicle speed information acquired from the in-vehicle device 2. Specify the current location.

  The mobile terminal 1 has an arithmetic unit 11 and a communication unit 12 therein. The in-vehicle device 2 includes an arithmetic unit 21, a communication unit 22, a display 23, and a speaker 24 therein.

  The arithmetic units 11 and 21 are constituted by a CPU, a memory, and the like, and various functions can be realized by software by executing a program. The communication units 12 and 22 are means for communication connection between the mobile terminal 1 and the in-vehicle device 2. The communication unit 12 may be wired connection, but it is preferable to use near field radio such as Bluetooth.

  The display 23 and the speaker 24 are output means for performing display output and audio output for a vehicle occupant, particularly a driver.

  In the present invention, the in-vehicle device 2 acquires a vehicle speed pulse of the vehicle and processes it into speed information. Then, the speed information obtained by this processing is transmitted to the mobile terminal 1 via the communication unit 22.

  The portable terminal 1 receives the speed information processed via the communication unit 12, determines the vehicle speed of the vehicle from the received speed information, and determines the position using the determined vehicle speed. As described above, the mobile terminal 1 executes the position specifying process using the speed of the vehicle, and the position information obtained as a result can be used for an arbitrary service.

  In the figure, the portable terminal 1 uses the position information obtained by the position specifying process for the navigation process. Further, the display 23 and the speaker 24 of the in-vehicle device are used via the communication units 12 and 22 for the output of the navigation processing, for example, the map display output and the guidance voice output.

  In this configuration, by using the output means provided in the in-vehicle device 2, it is possible to output with a large screen and a large volume. Further, processing such as position specifying processing and navigation processing is performed on the mobile terminal side. As a result, the cost of the in-vehicle device 2 can be reduced, and a mobile terminal such as a mobile phone that can be expected to be possessed by many users that is very inexpensive with respect to its computing ability is effectively used. It is possible. In particular, if a mobile phone possessed by the driver is used, the surplus resources can be used effectively because the calling function, which is the original main function, is not used during driving.

  Here, the mobile terminal 1 acquires the vehicle speed from the in-vehicle device 2 by communication in order to perform the position specification with high accuracy. However, the measurement of the vehicle speed in the in-vehicle device 2 is proportional to the rotational speed of the tire. The generated vehicle speed pulse is detected. However, for example, four vehicle speed pulses are generated per one rotation of the tire and become a continuous signal of about 40 Hz at 60 km / h.

  If the mobile terminal 1 always captures a high-frequency pulse signal directly, the processing load required for reception by the mobile terminal 1 increases and the power consumption also increases. Further, when the mobile terminal 1 and the in-vehicle device 2 are wirelessly connected, since it is necessary to cover all power consumption with the battery of the mobile terminal 1, the problem of power consumption becomes even more important.

  Therefore, in the present invention, the in-vehicle device 2 processes the vehicle speed pulse in consideration of the processing load on the mobile terminal, and transmits the vehicle speed pulse to the mobile terminal 1 at a frequency equal to or lower than the speed pulse cycle before processing, so that the mobile terminal 1 It reduces the processing load required when receiving information and reduces power consumption. As described above, the main feature of the present invention is that the load required to acquire the speed information is reduced by processing and transmitting / receiving the vehicle speed pulse.

2. Configuration Example of the Present Invention Next, the main functional configuration of the present invention will be described with reference to FIG. As already described, some of the functional elements in the present invention can be realized by software. However, in the configuration shown in the figure, it is appropriately selected whether the function is realized by hardware or software. Is possible.

  As shown in the figure, the in-vehicle device 2 includes a vehicle speed pulse acquisition unit 41, a communication processing unit 42, and a speed information processing unit 43 therein. The vehicle speed pulse acquisition unit 41 acquires a vehicle speed pulse from the vehicle and outputs it to the speed information processing unit 43.

  The speed information processing unit 43 creates speed information to be transmitted to the mobile terminal 1 from the vehicle speed pulse. A specific example of this processing is shown in FIG. The frequency of the vehicle speed pulse is proportional to the speed, and the pulse interval becomes shorter (the frequency becomes higher) as the speed increases. In the figure, the vehicle speed pulse interval t10 is shorter after the speed increase.

  Therefore, if the thinning process is performed while thinning out pulses and adding information about the thinning rate, an increase in speed can be shown while increasing the interval between pulses. In the example shown in the figure, when the speed increases from the vehicle speed pulse interval t20, the vehicle speed pulse is thinned by half to set the pulse interval to t21 and the number of pulses is increased (in this example, 2 minutes). The number of pulses is set to 2 because it is thinned to 1, and the mobile terminal counts the number of pulses C21 so that the original pulse interval can be known.

  Since the interval between the vehicle speed pulses becomes shorter as the vehicle speed becomes higher, the thinning rate may be changed according to the change in the vehicle speed. For example, if the vehicle speed is 40 km / h or more, the decimation rate is halved, and if the vehicle speed is 80 km / h or more, the decimation rate is ３. The method of thinning out the vehicle speed pulses is not limited to thinning out according to changes in the vehicle speed, but may be thinned out according to the shortness of the interval between the vehicle speed pulses, for example. In this case, for example, when the interval between the vehicle speed pulses becomes shorter than a predetermined time, thinning is performed at a predetermined rate (a thinning rate determined so that the thinning rate increases as the pulse interval becomes shorter). Conceivable. Further, the thinning rate may be adaptively changed so that the interval between the vehicle speed pulses after processing becomes constant.

  Furthermore, when the vehicle speed is low and the interval between the vehicle speed pulses is sufficiently long (for example, when the vehicle speed is less than 40 km / h), the vehicle speed pulse may be transmitted to the portable terminal 1 as it is without being processed.

  Further, the vehicle speed information may be transmitted as data described in a prescribed format. In this case, since there is no relation between the speed data that is the speed information after processing and its transmission interval, it can be transmitted from the in-vehicle terminal at a constant interval (interval t30 in the figure).

  Transmission of speed information from the in-vehicle device 2 to the portable terminal 1 is performed by the communication processing unit 42 in the in-vehicle device 2.

  The mobile terminal 1 includes a position specifying processing unit 31, a communication processing unit 32, and a GPS unit 33 therein. The communication processing unit 32 receives speed information from the in-vehicle device 2 and outputs it to the position specifying processing unit 31. The GPS unit 33 communicates with a GPS artificial satellite, calculates current coordinates, and outputs the calculated coordinates.

  The position specification processing unit 32 includes a GPS coordinate information acquisition unit 31a, a position determination unit 31b, a vehicle speed information acquisition unit 31c, and a vehicle speed determination unit 31d therein. The GPS coordinate information acquisition unit 31 a performs processing for acquiring coordinate information from the GPS unit 33. In addition, the vehicle speed information acquisition unit 31 c performs a process of acquiring speed information processed from the vehicle speed device via the communication processing unit 32.

  The vehicle speed determination unit 31d performs a process of determining the moving speed of the vehicle from the processed speed information. For example, when the thinned speed information is received, the vehicle speed pulse before the thinning process is restored from the received information, and the moving speed of the vehicle can be obtained. When the speed itself is acquired as data, the speed can be acquired by reading the information.

  The position determination unit 31b corrects the coordinate information acquired by the GPS coordinate information acquisition unit 31a based on the moving distance that can be calculated from the speed of the vehicle, determines the current position, and outputs it as position information.

  Next, processing operations of the mobile terminal 1 and the in-vehicle device 2 will be described with reference to FIG. The processing operation shown in the figure is preferably executed repeatedly as a main process of the portable terminal 1 and the in-vehicle device 2 or as a part thereof.

  First, the mobile terminal 1 calculates coordinate information using GPS (step S101). Subsequently, the processed speed information is received from the in-vehicle device 2 (step S102), and the vehicle speed is obtained from the received speed information (step S103). After that, the coordinate information obtained from the GPS is corrected with a travel distance that can be calculated based on the vehicle speed (step S104) and output as position information (step S105). The output position information can be used for any service such as vehicle navigation and drive recorder as described above.

  In the in-vehicle device 2, first, the vehicle speed pulse acquisition unit 41 acquires a vehicle speed pulse (step S <b> 201), and the speed information processing unit 43 processes the vehicle speed pulse and creates speed information that is transmitted to the portable terminal 1 (step S <b> 202). The communication processing unit 42 repeats the process of transmitting speed information to the mobile terminal 1 (step S203).

  As described above, the mobile terminal 1 and the in-vehicle device 2 according to the present embodiment acquire the vehicle speed pulse from the vehicle, process the vehicle speed pulse in consideration of the processing load on the mobile terminal, By transmitting to the mobile terminal 1 at a frequency equal to or less than the previous speed pulse period, the processing load required when the mobile terminal 1 receives speed information is reduced, and power consumption is reduced.

3. Modification of the Present Invention The configuration and operation shown in this embodiment are merely examples, and the present invention can be implemented with appropriate modifications. Here, another embodiment of the present invention will be described with reference to FIGS.

  FIG. 5 is a configuration example when map matching is used for specifying the position. In the figure, the portable terminal 50 has a position specifying processing unit 51 therein, which further includes a map information acquiring unit 51a, a map matching processing unit 51b, a vehicle speed information acquiring unit 31c, and a vehicle speed determining unit 31d. have.

  The map information acquisition part 51a performs the process which acquires map information from the portable terminal or from the vehicle-mounted apparatus 2 or the center which is not shown in figure. Then, the map matching processing unit 51b performs map matching using the map information acquired by the map information acquisition unit 51a and the vehicle speed information determined by the vehicle speed determination unit 31d (movement distance that can be calculated from the vehicle speed information), and the current position Is identified.

  Since other configurations and operations are the same as those of the mobile terminal 2 shown in FIG. 2, the same components are denoted by the same reference numerals and description thereof is omitted. Further, it can be implemented as a configuration using both GPS coordinate calculation and map matching in combination with the configuration shown in FIG.

  FIG. 6 is a configuration example when information other than speed information is acquired from the in-vehicle device. In the figure, the in-vehicle device 70 further includes a GPS unit 71, a steering information acquisition unit 72, an acceleration sensor 73, and a direction sensor 74 in addition to the vehicle speed pulse acquisition unit 41, the communication processing unit 42, and the speed information processing unit 43 therein. Have.

  The GPS unit 71 communicates with a GPS artificial satellite, calculates current coordinates, and outputs them. The steering information acquisition unit 72 acquires the operation state of the steering wheel, the acceleration sensor 73 acquires the acceleration applied to the vehicle, and the direction sensor 74 acquires and outputs the direction of the vehicle.

  The communication processing unit 42 transmits GPS coordinate information, steering information, acceleration information, and direction information to the mobile terminal 60 in addition to the speed information.

  Therefore, in the position specification processing unit 61 of the portable terminal 60, the GPS coordinate information acquisition unit 61a acquires the GPS coordinate information from the communication processing unit 32. In addition to the GPS coordinate information and the vehicle speed information, the position determination unit 31b determines the current position using steering information, acceleration information, and direction information.

  Thus, if GPS coordinate information is acquired from an in-vehicle device, the present invention can be applied even to a portable terminal that does not have a GPS function. Further, by further acquiring and using information such as steering information, the accuracy of position capture can be improved.

  Here, the case where steering information, acceleration information, and direction information are used has been described as an example, but only some of them may be used, or other information may be used. Needless to say.

  FIG. 7 is a configuration example in the case where the portable terminal 80 designates the processing content of the vehicle speed pulse by the in-vehicle device 90. The portable terminal 80 is the same as the portable terminal shown in FIG. 2 except that it further includes a speed information processing request unit 81a inside the position specifying processing unit 81.

  Based on the determination result of the vehicle speed determination unit 31d, the speed information processing request unit 81a designates and requests the in-vehicle device 90 by specifying the possible contents of the speed information, for example, at what decimation rate the vehicle speed pulse is thinned out. To do.

  Alternatively, the speed information processing requesting unit 81a thins out at a thinning rate according to the shortness of the reception interval of the processed speed information acquired by the vehicle speed information acquisition unit 31c (interval of the processed vehicle speed pulse). You can decide. In this case, for example, when the interval of the received processed vehicle speed pulse becomes shorter than a predetermined time, a predetermined rate (a decimation rate determined so that the decimation rate increases as the pulse interval becomes shorter). ) May be specified to be thinned out.

  The speed information processing unit 91 of the in-vehicle device 90 processes the vehicle speed pulse based on the processing content via the speed information via the communication processing unit 42 and transmits it to the mobile terminal.

  In this way, by specifying the processing content and the transmission frequency of the speed information from the mobile terminal side and acquiring the speed information, the speed information can be acquired at a frequency according to the load state of the mobile terminal 80.

(Supplementary note 1) A speed detection program that operates on a vehicle-mounted device mounted on a moving body, and that acquires a speed pulse whose period changes depending on the moving speed of the mobile body. When,
A speed information processing step of processing the speed pulse to create processing speed information;
A transmission step of transmitting the processing speed information to a mobile terminal;
A speed detection program characterized by causing

(Supplementary note 2) The speed detection program according to supplementary note 1, wherein, in the speed information processing step, the speed pulse is thinned, and information on the thinning process is added to create processing speed information.

(Supplementary note 3) The speed according to supplementary note 2, wherein the speed information processing step changes a thinning rate of the thinning process based on a speed of a moving body indicated by the speed pulse or an interval of the speed pulses. Detection program.

(Supplementary note 4) The speed detection program according to supplementary note 3, wherein in the speed information processing step, the thinning process is selectively performed when the speed pulse period is a predetermined value or more.

(Additional remark 5) The said speed information processing step receives designation | designated of the content of a process from the said portable terminal, and produces the said processing speed information based on the said designation | designated, As described in any one of Additional remark 1-4 characterized by the above-mentioned. Speed detection program.

(Additional remark 6) It is a position identification program which operate | moves on a portable terminal, Comprising: The receiving step which carries out near field communication with the vehicle-mounted apparatus mounted in the mobile body to this portable terminal, and acquires the speed information processed by the said vehicle-mounted apparatus; ,
A speed determination step of determining a moving speed of the moving body from the acquired processed speed information;
A position specifying step of specifying the position of the moving body using the moving speed;
A position specifying program characterized in that is executed.

(Supplementary note 7) The position specifying program according to supplementary note 6, wherein the processed speed information is information created by thinning out the speed pulse and adding information related to the thinning process.

(Additional remark 8) The position specification program of Additional remark 6 or 7 further including the transmission step which transmits the process request which designates the process content of the said speed information with respect to the said vehicle equipment.

(Additional remark 9) The said process request is an instruction | indication which changes the speed | rate which thins out the said speed pulse according to the speed of the moving body shown by the processed speed information acquired by the said receiving step, or the receiving interval of the said speed information The location specifying program according to appendix 8, wherein the location specifying program is a request for providing

(Supplementary note 10) Any one of Supplementary notes 6 to 9, wherein the position specifying step specifies the position of the moving body by correcting the coordinate information calculated by the GPS based on the moving speed. Location program described in.

(Additional remark 11) The said reception step further acquires the said coordinate information from the said vehicle-mounted apparatus, The said position specific step specifies the position of the said mobile body using the coordinate information acquired from the said vehicle-mounted apparatus, It is characterized by the above-mentioned. The location specifying program according to appendix 10.

(Additional remark 12) The said position specific step specifies the position of the said mobile body combining map information and the said moving speed, The position specific program as described in any one of additional marks 6-9 characterized by the above-mentioned.

(Supplementary note 13) An in-vehicle device mounted on a moving body,
Speed pulse acquisition means for acquiring a speed pulse whose period changes depending on the moving speed of the moving body;
Speed information processing means for processing the speed pulse to create processing speed information;
Transmitting means for transmitting the processing speed information to a mobile terminal;
A vehicle-mounted device comprising:

(Supplementary note 14) The in-vehicle apparatus according to supplementary note 13, wherein the speed information processing means thins out the speed pulse and adds information related to the thinning process to create processing speed information.

(Supplementary note 15) The vehicle-mounted vehicle according to supplementary note 14, wherein the speed information processing unit changes a thinning rate of the thinning process based on a speed of a moving body indicated by the speed pulse or an interval of the speed pulses. apparatus.

(Supplementary note 16) The in-vehicle device according to supplementary note 15, wherein the speed information processing means selectively performs the thinning process when the speed pulse period is a predetermined value or more.

(Additional remark 17) The said speed information processing means receives the designation | designated of the content of a process from the said portable terminal, and produces the said processing speed information based on the said designation | designated, The additional description 13-16 characterized by the above-mentioned. In-vehicle device.

(Supplementary Note 18) Communication means for performing near field communication with an in-vehicle device mounted on a moving body and acquiring speed information processed by the in-vehicle device;
Speed determining means for determining a moving speed of the moving body from the acquired processed speed information;
Position specifying means for specifying the position of the moving body using the moving speed;
A portable terminal device comprising:

(Supplementary note 19) The portable terminal device according to supplementary note 18, wherein the processed speed information is information created by thinning out the speed pulse and adding information related to the thinning process.

(Supplementary note 20) The mobile terminal device according to Supplementary note 18 or 19, wherein the communication unit transmits a processing request designating processing content of the speed information to the in-vehicle device.

(Additional remark 21) The said process request is an instruction | indication which changes the space | interval which thins out the said speed pulse according to the speed of the moving body shown by the processed speed information acquired by the said communication means, or the receiving interval of the said speed information Item 21. The mobile terminal device according to appendix 20, wherein

(Additional remark 22) The said position specific | specification means correct | amends by the said moving speed with respect to the coordinate information calculated by GPS, and specifies the position of the said mobile body any one of Additional remarks 18-21 characterized by the above-mentioned. The mobile terminal device according to 1.

(Supplementary note 23) The communication unit further acquires the coordinate information from the in-vehicle device, and the position specifying unit specifies the position of the moving body using the coordinate information acquired from the in-vehicle device. The mobile terminal device according to Supplementary Note 22.

(Supplementary Note 24) The mobile terminal device according to any one of Supplementary Notes 18 to 21, wherein the position specifying unit specifies the position of the moving body by combining map information and the moving speed.

  As described above, the speed detection program, the position specifying program, the in-vehicle device, and the mobile terminal device according to the present invention are useful for position acquisition by the mobile terminal device in cooperation with the in-vehicle terminal device, and are particularly accurate with a low processing load. Suitable for realization of position acquisition.

It is explanatory drawing explaining the outline | summary of this invention. It is an outline explanatory view explaining an outline structure of a personal digital assistant concerning a present invention, and an in-vehicle device. It is explanatory drawing explaining the process of a vehicle speed pulse. It is a flowchart explaining the processing operation of the portable terminal and vehicle equipment shown in FIG. It is explanatory drawing explaining the structural example in the case of performing the position specification by map matching. It is explanatory drawing explaining the structural example in the case of acquiring information other than vehicle speed information from a vehicle-mounted apparatus. It is explanatory drawing explaining the structural example in case a portable terminal designates the processing content of a vehicle speed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,50,60,80 Mobile terminal 2,70,90 In-vehicle apparatus 11,21 Computation unit 12,22 Communication unit 23 Display 24 Speaker 31,51,61,81 Position specific process part 31a, 61a GPS coordinate information acquisition part 31b Position determination unit 31c Vehicle speed information acquisition unit 31d Vehicle speed determination unit 32, 42 Communication processing unit 33, 71 GPS unit 41 Vehicle speed pulse acquisition unit 43, 91 Speed information processing unit 51a Map information acquisition unit 51b Map matching processing unit 72 Steering information acquisition unit 73 Acceleration sensor 74 Direction sensor 81a Speed information processing request part

Claims (7)

A speed detection program that operates on a vehicle-mounted device mounted on a moving body,
In the in-vehicle device,
A speed pulse acquisition step for acquiring a speed pulse whose period changes depending on the moving speed of the moving body;
A speed information processing step for thinning out the speed pulse and adding information related to the thinning processing to create processing speed information,
A transmission step of transmitting the processing speed information to the mobile terminal device ;
A speed detection program characterized by causing 2. The speed detection program according to claim 1 , wherein the speed information processing step changes a thinning rate of the thinning processing based on a speed of a moving body indicated by the speed pulse or an interval of the speed pulses. A position specifying system including an in-vehicle device and a mobile terminal device mounted on a moving body,
Speed pulse acquisition means for acquiring a speed pulse whose period changes depending on the moving speed of the moving body;
Speed information processing means for thinning out the speed pulse and adding processing information on the thinning processing to create processing speed information;
Transmitting means for transmitting the processing speed information;
An in-vehicle device having
Communication means for the vehicle unit and to the short-range communication, acquires the processing speed information transmitted from the vehicle-mounted device,
Speed determining means for determining a moving speed of the moving body from the acquired processing speed information;
Position specifying means for specifying the position of the moving body using the moving speed;
A portable terminal device having
Location system which comprising the. The mobile terminal device further includes a processing request transmission means for transmitting a processing request designating processing content of the speed information to the in-vehicle device ,
The position specifying system according to claim 3 , wherein the speed information processing unit processes the speed pulse based on the processing request . Said position specifying means, localization according to claim 3, characterized in that locating the moving body by performing correction by the moving speed relative coordinate information calculated by the GPS (Global Positioning System) System . An in-vehicle device mounted on a moving body,
Speed pulse acquisition means for acquiring a speed pulse whose period changes depending on the moving speed of the moving body;
Speed information processing means for thinning out the speed pulse and adding processing information on the thinning processing to create processing speed information;
Transmitting means for transmitting the processing speed information to a mobile terminal;
A vehicle-mounted device comprising:   A speed detection method for an in-vehicle device mounted on a moving body,
  The in-vehicle device is
  Obtaining a speed pulse whose period changes depending on the moving speed of the moving body;
  While thinning out the speed pulse, information on the thinning process is added to create processing speed information,
  The processing speed information is transmitted to the mobile terminal device
  The speed detection method characterized by this.

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