CN100477751C - Vehicular information providing device - Google Patents
Vehicular information providing device Download PDFInfo
- Publication number
- CN100477751C CN100477751C CNB2006100879777A CN200610087977A CN100477751C CN 100477751 C CN100477751 C CN 100477751C CN B2006100879777 A CNB2006100879777 A CN B2006100879777A CN 200610087977 A CN200610087977 A CN 200610087977A CN 100477751 C CN100477751 C CN 100477751C
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- China
- Prior art keywords
- vehicle
- crosspoint
- broadcasting
- electric field
- digital broadcasting
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
- G08G1/096855—Systems involving transmission of navigation instructions to the vehicle where the output is provided in a suitable form to the driver
- G08G1/096861—Systems involving transmission of navigation instructions to the vehicle where the output is provided in a suitable form to the driver where the immediate route instructions are output to the driver, e.g. arrow signs for next turn
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/091—Traffic information broadcasting
- G08G1/093—Data selection, e.g. prioritizing information, managing message queues, selecting the information to be output
Abstract
Disclosed is a vehicular information providing device comprising: a receiving unit that receives digital broadcast; an extracting unit for extracting high quality digital broadcast which cannot be received if electric field intensity is not high and low quality digital broadcast which can be received even if electric field intensity is low; a switching unit, which outputs either of said high quality digital broadcast and low quality digital broadcast; a detecting unit for detecting car's direction changes; and a control unit that controlling said switching unit when the detecting unit has detected any direction changes, and makes the output coming from the switching unit fixed to the low quality digital broadcast.
Description
Technical field
The present invention relates to a kind of on-vehicle information generator with function of receiving digital broadcast.
Background technology
Well-known a kind of broadcast receiver, when the high level transmission that can transmit high quality image being received, because the decay that influences such as rainfall cause receiving electric wave becomes big, when error rate surpasses the threshold value of regulation, automatically switch to the reception that the low layer of the low-quality image of transmission of low layer transmits, realize continuing to receive broadcasting.Known in addition following a kind of digital broacast receiver: switch hastily by high-rise and low layer, preventing to look the hearer docks and receives image and feel bad, when error rate has from tendency that the state that is lower than threshold value rises, even also receive low layer regularly under the high-rise situation that transmits and transmit (spy opens the 2003-143503 communique) can receiving at official hour.
Open in the digital broacast receiver of 2003-143503 communique invention the spy, tendency according to the reception situation judges whether to switch hastily the transmission of reception high level and receives the low layer transmission, so existence can't be judged this problem of scope of switching rapidly reliably.Thus, even under the reception environment that does not hinder switching, also continue to watch inferior image.
Summary of the invention
First embodiment of the invention, a kind of on-vehicle information generator has: the receiving element of receiving digital broadcast; Extraction unit, the low-quality digital broadcasting that high-quality digital broadcasting that can't receive when extraction electric field strength is not high from the digital broadcasting that receives and electric field strength also can receive when low; Switch unit, the described high-quality digital broadcasting that extracted of output and in the described low-quality digital broadcasting any one; Detecting unit detects the situation that vehicle changes direction; Control unit when described detecting unit detects vehicle change direction, is controlled described switch unit and is made the output from described switch unit be fixed as described low-quality digital broadcasting.
Second embodiment of the invention, in described first execution mode, described detecting unit preferably detects vehicle change direction by detecting vehicle near the crosspoint that changes direction.
According to the 3rd execution mode of the present invention, in described second execution mode, described control unit preferably begins to make the output from described switch unit be fixed as described low-quality digital broadcasting to by the described switch unit of control till the described crosspoint near moment in described crosspoint from vehicle.
According to the 4th execution mode of the present invention, in described first execution mode, also have: the route searching unit that the recommendation paths to the destination is carried out route searching; Detect the current on-site current location of vehicle detecting unit; Extract the crosspoint extraction unit that described vehicle changes the crosspoint of direction according to described recommendation paths, described detecting unit detects the current location of the detected vehicle of the described current location detecting unit situation near the place of predetermined distance before the crosspoint that is extracted by described extraction unit, detect the situation that vehicle changes direction thus, the moment in described control unit place of predetermined distance before the approaching crosspoint that extracts by described extraction unit from vehicle, during till the described crosspoint, control described switch unit to described vehicle, make output be fixed as described low-quality digital broadcasting from described switch unit.
According to the 5th execution mode of the present invention, in described first execution mode, also have the signalling that detects of lighting that is arranged on the signalling on the vehicle is lighted detecting unit, described detecting unit detects lighting of the signalling that is arranged on the vehicle by described signalling lighting unit, detect vehicle and change direction, described control unit described signalling light during control described switch unit, make output be fixed as described low-quality digital broadcasting from described switch unit.
According to the 6th execution mode of the present invention, in described the 4th execution mode, also have the signalling that detects of lighting that is arranged on the signalling on the vehicle is lighted detecting unit, described detecting unit is by detecting the current location of the detected vehicle of the described current location detecting unit situation near the place of predetermined distance before the crosspoint that is extracted by described extraction unit, and light detecting unit by described signalling the situation of lighting that is arranged on the signalling on the vehicle is detected, detect the situation that vehicle changes direction thus, described control unit described signalling light during control described switch unit, make output be fixed as described low-quality digital broadcasting from described switch unit.
According to the 7th execution mode of the present invention, in described first execution mode, also have: detect the current on-site current location of vehicle detecting unit; Extraction is positioned at the crosspoint extraction unit in the crosspoint on the direct of travel of described vehicle; Stored the electric field strength memory cell of the broadcast wave electric field strength of the digital broadcasting on the described crosspoint that described vehicle will pass through in advance, described detecting unit detects by the current location of the detected vehicle of the described current location detecting unit situation near the place of predetermined distance before the crosspoint that is extracted by described crosspoint extraction unit, detect vehicle thus and change direction, when the described electric field strength of described control unit on the described crosspoint that the described vehicle of being stored in advance by described electric field strength memory cell will pass through is less than or equal to setting, from described vehicle near this crosspoint before moment in place of predetermined distance, during till the described crosspoint, control described switch unit to described vehicle, make output be fixed as described low-quality digital broadcasting from described switch unit.
According to the 8th execution mode of the present invention, in the on-vehicle information generator of described first to the 7th any one execution mode, the electric field strength detecting unit that also has the electric field strength of the broadcast wave that detects received terrestrial digital broadcasting, described switch unit is not when having to be fixed as from the output of described switch unit described low-quality digital broadcasting, switch to described high-quality digital broadcasting during more than or equal to first setting in described electric field strength, when described electric field strength is less than or equal to than little second setting of described first setting, switch to described low-quality digital broadcasting.
According to the 9th execution mode of the present invention, in the on-vehicle information generator of described first to the 7th any one execution mode, described high-quality digital broadcasting is 12 sections (segment) broadcasting of received terrestrial digital broadcasting, and described low-quality digital broadcasting is 1 section broadcasting of received terrestrial digital broadcasting.
According to the present invention, when predicting the travel conditions that vehicle turns about the crosspoint, switch to the good low-quality digital broadcasting of receiving sensitivity and fixing, so can advance preventing digital broadcasting audiovisual obstacle occur by the switching of high-quality digital broadcasting and low-quality digital broadcasting.
Description of drawings
Fig. 1 is the block diagram of structure of guider of first execution mode of expression on-vehicle information generator of the present invention.
Fig. 2 (a) is the schematic diagram of the part in the path explored of expression, (b) is the figure that is used to illustrate the recommendation paths data.
Fig. 3 is the block diagram of the structure of expression received terrestrial digital broadcasting acceptance division.
Fig. 4 (a) is illustrated in the variation of electric field strength of the broadcast wave of the vehicle ' received terrestrial digital broadcasting that antenna receives on recommendation paths the time, when Fig. 4 (b) expression is switched the broadcasting of audiovisual according to electric field strength, on recommendation paths, the travel broadcasting of time institute's audiovisual of vehicle, Fig. 4 (c) be illustrated in enter when being fixed as 1 section broadcasting before the crosspoint, on recommendation paths, the travel broadcasting of time institute's audiovisual of vehicle.
Fig. 5 is used to illustrate the switching of moving and broadcasting of vehicle on recommendation paths.
Fig. 6 is used to illustrate that digital broadcasting receives the menu screen of setting.
Fig. 7 is the flow chart of broadcasting hand-off process of guider that is used to illustrate first execution mode of on-vehicle information generator of the present invention.
Fig. 8 is the flow chart based on the broadcasting hand-off process of electric field strength of guider that is used to illustrate first execution mode of on-vehicle information generator of the present invention.
Fig. 9 is the block diagram of structure of guider of second execution mode of expression on-vehicle information generator of the present invention.
Figure 10 is used to illustrate vehicle situation in the crosspoint left-hand rotation when lighting signalling.
Figure 11 is the flow chart of broadcasting hand-off process of guider that is used to illustrate second execution mode of on-vehicle information generator of the present invention.
Figure 12 is the block diagram of structure of guider of the 3rd execution mode of expression on-vehicle information generator of the present invention.
Figure 13 is used to illustrate crosspoint electric field strength data.
Figure 14 is used to illustrate moving and the switching of broadcasting of vehicle.
Figure 15 is the flow chart of broadcasting hand-off process of guider that is used to illustrate the 3rd execution mode of on-vehicle information generator of the present invention.
Figure 16 is the flow chart of variation of broadcasting hand-off process that is used to illustrate the guider of second execution mode.
Embodiment
First execution mode
Fig. 1 represents the structure of guider of first execution mode of on-vehicle information generator of the present invention.The guider 1 of Fig. 1 can also receive received terrestrial digital broadcasting and carry out audiovisual except having common navigation feature such as displayed map.Guider 1 has control circuit 11, ROM12, RAM13, current location testing fixture 14, video memory 15, display monitor 16, loud speaker 17, input unit 18, received terrestrial digital broadcasting acceptance division 19 and disk drive 110.The DVD-ROM111 that has write down map datum is installed in disk drive 110.
Current location checkout gear 14 is to detect the current on-site device of vehicle, for example by the vibratory gyroscope 14a of the direct of travel that detects vehicle, detect the speed of a motor vehicle vehicle speed sensor 14b, detect formations such as GPS transducer 14c from GPS (Global Positioning System) Satellite GPS signal.Guider 1 is according to the current location by these current location checkout gear 14 detected vehicles, and the indication range of decision map and search starting point etc. should be presented on the map in current location simultaneously.
When setting the destination by the occupant, guider 1 will be by current location checkout gear 14 detected current locations as the departure place, and algorithm according to the rules arrives the path computing of destination.Below, this path computing is called route searching.The route of obtaining like this (hereinafter referred to as recommendation paths) is carried out picture distinctively with other roads and is shown by changing for example Show Color etc. of display format.Thus, the occupant can be at the recommendation paths on the identification map on the picture.In addition, guider 1 carries out direct of travel by picture, sound etc. to the occupant and indicates guided vehicle, so that can come driving vehicle according to recommendation paths.
The information of carrying out the recommendation paths that route searching obtains is stored among the RAM13 as recommendation paths data 21.With reference to Fig. 2 recommendation paths data 21 are described.The part in the path that Fig. 2 (a) expression searches, recommendation paths R1 is made of link L1～L6 and node N1～N6, and vehicle changes direction 90 degree at each node.An example in Fig. 2 (b), representing the data structure of such recommendation paths R1.
Recommendation paths data 21 have the position coordinates of recommending routing number, number of nodes, number of links, node number, each node, be connected with each node enter the link number, be connected with each node withdraw from the link number, enter link and withdraw from each information of the connection angle of link.About node number N1, record: position coordinates X1, the Y1 of node N1; The link number L1 that enters link that is connected with node N1; The link number L2 that withdraws from link that is connected with node N1; Enter link L1 and connection angle-90 degree that withdraws from link L2.Here, negative value is represented to turn left.
Received terrestrial digital broadcasting acceptance division 19 receives received terrestrial digital broadcasting, and at display monitor 16, loud speaker 18 these broadcasted contents that receive of output.Detailed content about received terrestrial digital broadcasting acceptance division 19 will be stated in the back.Disk drive 110 is read the map datum that is used for displayed map on display monitor 16 from the DVD-ROM111 that is packed into.Map datum comprises broadcast area information, map and shows with data, route searching with data etc.Map shows with data to have from a large scale to the map datum of detailed a plurality of engineer's scales, can change the engineer's scale of displayed map according to occupant's requirement.In addition, also can read map datum from other recording mediums, for example CD-ROM or hard disk etc. beyond the DVD-ROM111.
With reference to Fig. 3, received terrestrial digital broadcasting acceptance division 19 is described.Received terrestrial digital broadcasting acceptance division 19 has antenna 31,32, antenna switching part 33, tuner 34,36,1 section broadcasting of 35,12 sections broadcasting of demodulation section decoding part decoding part 37, decoding part RAM38,39, switching part 315, NTSC (NationalTelevision System Committee) encoding section 310, voice signal DA converter section 311 and Department of Communication Force 312.Here, the part of dotted line 313 is called leading section 313 (front), the part of dotted line 314 is called rearward end 314.
12 segment signals towards the television set of being settled that 12 sections 36 pairs of decoding parts of broadcasting are included in 13 segment signals in the signal of ground digital ripple carry out decompression, and thus, decompress(ion) contracts and extracts data image signal and the audio digital signals that is compressed by MPEG.Below, will be called 12 sections broadcasting based on the broadcasting of 12 segment signals.In addition, 1 segment signal towards portable terminal device in 13 segment signals that comprise in the signal with the ground digital ripple sends to 1 section broadcasting decoding part 37.Below, will be called 1 section broadcasting based on the broadcasting of 1 segment signal.37 pairs of 1 segment signals towards portable terminal device of 1 section broadcasting decoding part are implemented decompression, and decompress(ion) contracts and extracts compressed data image signal and audio digital signals thus.
12 sections broadcasting decoding parts 36 separate the signal of 12 sections broadcasting from the signal of the received terrestrial digital broadcasting that receives, 1 section broadcasting decoding part 37 separates the signal of 1 section broadcasting from the signal of the received terrestrial digital broadcasting that receives.
In 12 sections broadcasting, can transmit the most about 21Mbit/ numerical data of second, can send the high-quality images such as high definition broadcasting of maximum 1920 * 1080 pixels.In addition, information of voice, data broadcasting etc. can also be sent with image.For 12 sections broadcasting of audiovisual need electric field strength stronger.On the other hand, in 1 section broadcasting, be merely able to transmit the 200k～300kbit/ data of second, can only send inferior image.But, even strong at noise, as can't to receive the such electric wave of 12 sections broadcasting reception situations also can receive 1 section broadcasting than under the condition of severe.In this specification, 12 sections broadcasting are called high-quality digital broadcasting, 1 section broadcasting is called low-quality broadcasting.
Decoding part RAM38,39 has the function as the working region of the compressed and decompressed processing of 12 sections broadcasting decoding parts 36 and 1 section broadcasting decoding part 37.The output of 12 sections broadcasting decoding parts 36 and 1 section broadcasting decoding part 37 is input in the switching part 315.Switching part 315 input expression come self-tuner 34 the electric field strength size signal and via the command signal of Department of Communication Force 312 from control circuit 11, suitably switch from the output of 12 sections broadcasting decoding parts 36 with from the output of 1 section decoding part 37 according to these signals.The output of 12 sections broadcasting decoding parts 36 that will be switched by switching part 315 and any one of 1 section broadcasting decoding part 37 is input in NTSC encoding section 310 and the voice signal DA change-over circuit 311.
The command signal that Department of Communication Force 312 is imported from control circuit 11, and output to switching part 315.When from the command signal of the audiovisual of 12 sections broadcasting of control circuit 11 output, switching part 315 switches to the output from 12 sections broadcasting decoding parts 36, and the data image signal and the audio digital signals of 12 sections broadcasting outputed to NTSC encoding section 310 and voice signal DA change-over circuit 311.In addition, switching part 315 is when the command signal of the audiovisual that receives 1 section broadcasting from control circuit 11, switch to output, the data image signal and the audio digital signals of 1 section broadcasting outputed to NTSC encoding section 310 and voice signal DA change-over circuit 311 from 1 section broadcasting decoding part 37.In addition, switching part 315 according to the electric field strength of coming self-tuner 34, suitably switches from the output of 12 sections broadcasting decoding parts 36 with from the processing of the output of 1 section broadcasting decoding part 37 when the command signal that receives from control circuit 11 based on electric field strength.For these processing, will discuss in the back.
With reference to Fig. 4～Fig. 5, the broadcasting hand-off process of the guider 1 of embodiment of the present invention 1 is described.
Switching part 315 is illustrated as receiving the device that instructs based on the hand-off process of electric field strength from control circuit 11.Fig. 4 (a) is the schematic diagram that the electric field strength at the vehicle ' received terrestrial digital broadcasting ripple that antenna 31,32 receives during at recommendation paths changes.Here, vehicle ' is turned right or left-hand rotation in the crosspoint on recommendation paths.The scope in the crosspoint that arrow is represented is represented the interval by the crosspoint.On the electric field strength axle of Fig. 4 (a), so-called " 1 section → 12 sections switchings " be electric field strength 41, this electric field strength 41 is for switching to the received terrestrial digital broadcasting of audiovisual the benchmark of 12 sections broadcasting from 1 section broadcasting.
When the electric field strength of antenna 31,32 receptions reached electric field strength 41, switching part 315 switched to 12 sections broadcasting with the received terrestrial digital broadcasting of audiovisual from 1 section broadcasting.So-called " 12 sections → 1 section switching " is electric field strength 42, and this electric field strength 42 is for switching to the received terrestrial digital broadcasting of audiovisual the benchmark of 1 section broadcasting from 12 sections broadcasting.When the electric field strength of antenna 31,32 receptions reached electric field strength 42, switching part 315 switched to 1 section broadcasting with the received terrestrial digital broadcasting of audiovisual from 12 sections broadcasting.
Fig. 4 (b) is illustrated in vehicle ' when electric field strength on the recommendation paths changes, by the broadcasting of received terrestrial digital broadcasting acceptance division 19 audiovisual shown in Fig. 4 (a).In being expressed as the interval of 1G, 1 section broadcasting of audiovisual is in the broadcasting that is expressed as 12 sections of audiovisual in the interval of 12G.
Usually, vehicle is by the crosspoint, when changing direct of travel (when changing direction), antenna 31,32 towards and send and concern between the position of electric wave tower of received terrestrial digital broadcasting and change that the electric field strength of reception received terrestrial digital broadcasting changes.In addition, even switched by the antenna switching part 33 of reception antenna 31,32, the electric field strength of the received terrestrial digital broadcasting of reception also changes.Therefore, when the crosspoint, shown in Fig. 4 (b), when vehicle during by the crosspoint frequent real estate give birth to switching between 1 section broadcasting and the 12 sections broadcasting, automotive occupant feels unpleasant to the reception image.
Therefore, in first execution mode of the present invention, suitably change is from the command signal of control circuit 11 to switching part 315.Thus, shown in Fig. 4 (c), when entering the crosspoint, the broadcasting with audiovisual in advance switches to 1 section broadcasting, and is fixed as 1 section broadcasting till passing through the crosspoint.Then, by behind the crosspoint, the electric field strength of the electric wave that receives according to antenna 31,32 is switched the broadcasting of audiovisual.
With reference to Fig. 5 the switching of moving and broadcasting on the recommendation paths of vehicle is described.Fig. 5 is the schematic diagram of the road-map 50 of expression vehicle 51 and recommendation paths 52.In road-map 50, show road 53a, 53b, 54a～54c.Vehicle 51 travels on the recommendation paths 52 that turns left at crossing 55, turns right in crosspoint 56.When vehicle 51 arrives apart from the crosspoint 55 distance and is the place 59 of predetermined distance, the broadcasting of audiovisual is fixed as 1 section broadcasting.Then, when vehicle 51 during by crosspoint 55, the electric field strength of the broadcast wave that receives according to antenna 31,32 is switched the broadcasting of reception.
When vehicle 51 arrives apart from the crosspoint 56 distance and is the place 510 of predetermined distance, the broadcasting of audiovisual is fixed as 1 section broadcasting.Then, when vehicle 51 during by crosspoint 56, the electric field strength of the broadcast wave that receives according to antenna 31,32 is switched the broadcasting of reception.
The flow chart of use Fig. 7 describes the broadcasting hand-off process of the guider 1 of first execution mode of on-vehicle information generator of the present invention.Receive the processing of setting program execution graph 7 in control circuit 11 in the menu 60, that begin during to 12 sections broadcasting and 1 section pattern 61 that broadcasting is switched by the received terrestrial digital broadcasting that shows on the display monitor 16 of having selected Fig. 6.In addition, finish the route searching of recommendation paths, determine recommendation paths.
In step S701,, extract entering link and withdrawing from the node of the connection angle of link of each node more than or equal to setting according to recommendation paths data 21.In step S702, go up the setting sign at the node that extracts (guiding crosspoint).
In step S703, detect the current location of vehicle 51 by current location checkout gear 14.In step S704, judge the current location of vehicle 51 and set distance between the crosspoint of sign whether in setting.S704 is an affirmative determination in the time of in setting, enters into step S705.Step S704 is a negative evaluation when not in setting, enters step S708.In step S705, broadcast the audiovisual command signal via Department of Communication Force 312 for 1 section to switching part 315 outputs, to receive 1 section broadcasting.Switching part 315 switches to the output from 1 section broadcasting decoding part 37.
In step S706, detect the current location of vehicle.In step S707, judge whether vehicle 51 has passed through the crosspoint.Step S707 is an affirmative determination when having passed through the crosspoint, enters step S708.Step S707 is a negative evaluation when not by the crosspoint, turns back to step S706.In step S708, to switching part 315 output broadcasting hand-off process command signals, the switching controls of broadcasting with the electric field strength of the received terrestrial digital broadcasting that receives according to antenna 31,32.Switching part 315 is set at the hand-off process based on the broadcasting of electric field strength, carries out suitable switching according to electric field strength.Then, return step S703, reprocessing.
Fig. 8 is the flow chart of the hand-off process of switching part 315 when being set at broadcasting hand-off process based on electric field strength.Switching part 315 is made of microprocessor and its peripheral circuit.Below, describe with reference to the flow chart of Fig. 8.Among the step S801, switching part 315 judges whether to receive has set 12 sections broadcasting.Step S801 is an affirmative determination when 12 sections broadcasting have been set in reception, enters step S802.Step S801 is a negative evaluation when not receiving 1 section broadcasting of setting, enters step S805.
In step S802, read in the electric field strength that detects by tuner 34.In step S803, judge whether detected electric field strength is less than or equal to electric field strength 42 (with reference to Fig. 4), this electric field strength 42 is to switch to 1 section broadcasting from 12 sections broadcasting to receive the benchmark of setting.Step S803 is an affirmative determination when detected electric field strength is less than or equal to electric field strength 42, enters step S804.Step S803 is a negative evaluation when detected electric field strength surpasses electric field strength 42, returns step S802.In step S804, will receive setting and switch to 1 section broadcasting.Then, turn back to step S801 reprocessing.
In step S805, read in the electric field strength that detects by tuner 34.In step S806, judge that whether detected electric field strength is more than or equal to electric field strength 41 (with reference to Fig. 4).Detected electric field strength during more than or equal to electric field strength 41 step S806 be affirmative determination, and enter step S807.Step S806 is a negative evaluation when the not enough electric field strength 41 of detected electric field strength, and returns step S805.In step S807, will receive setting and switch to 12 sections broadcasting.Then, turn back to step S801 reprocessing.
In addition, the processing of Fig. 8 also can be carried out in the control circuit 11 of guider 1.At this moment, send the signal of expression electric field strength grade to control circuit 11 via Department of Communication Force 312.Control circuit 11 carries out the processing identical with Fig. 8, sends the switching command signal via Department of Communication Force 312 to switching part 315, carries out the switching of 12 sections broadcasting and 1 section broadcasting thus.
More than the guider of first execution mode of the present invention function as follows effect.
(1) at the recommendation paths that arrives according to route searching, vehicle near about commentariess on classics when waiting crosspoint of going direction changing, switch and be fixed as 1 section broadcasting till passing through this crosspoint.Therefore, can prevent obstacle to occur owing to switch the digital broadcasting audiovisual.
(2), switch 1 section broadcasting of 12 sections broadcasting according to the electric field strength of the broadcast wave of received terrestrial digital broadcasting by behind this crosspoint.Therefore, even under can't the reception situation of 12 sections broadcasting of audiovisual, can not interrupt the audiovisual of program, carry out audiovisual by 12 sections high-quality broadcasting in the place that electric wave is in good condition by 1 section broadcasting, in conjunction with the effect of above-mentioned (1), eliminate occupant's being discontented with to in-car TV.
Second execution mode
Fig. 9 represents the structure of guider 9 of second execution mode of on-vehicle information generator of the present invention.The identical symbol of part mark with the guider 1 of first execution mode has mainly describes difference.The guider 9 of second execution mode is a signalling test section 91, signalling test section 91 is to detect or turn right with the device of lighting of signalling (direction indicator), and control circuit 11 bases are lighted from the signal detection signal device of signalling test section 91.
With reference to Figure 10 the broadcasting switching of the guider 9 of second embodiment of the invention is described.Figure 10 is used to illustrate that vehicle 101 lights signalling 102a～102d 103 situations of turning left in the crosspoint simultaneously.Till vehicle 101 is near crosspoint 103,, between 12 sections broadcasting and 1 section broadcasting, switch the broadcasting of audiovisual according to the electric field strength of the broadcast wave of received terrestrial digital broadcasting.Then, the position A of occupant before entering crosspoint 103 lights signalling 102b, 102c that expression is turned left.In addition, when turning right, the position A of occupant before entering crosspoint 103 lights signalling 102a, 102d.
When lighting 102b, 102c, the broadcasting of audiovisual switches to 1 section broadcasting.Then, be traveling on the crossing 103 at vehicle 101, crosspoint signalling 102b, 102c light during (position B, C), even the electric field strength of received terrestrial digital broadcasting more than or equal to electric field strength 41, also the broadcasting with audiovisual is fixed as 1 section broadcasting.Then, by crosspoint 93 in-position D, when having stopped the lighting of signalling 102b, 102c,, between 12 sections broadcasting and 1 section broadcasting, switch the broadcasting of audiovisual once more according to the electric field strength of the broadcast wave of received terrestrial digital broadcasting.
With reference to Figure 11, the broadcasting hand-off process of the guider 9 of second execution mode of on-vehicle information generator of the present invention is described.By the program of when lighting signalling, starting, in control circuit 11, carry out the processing of Figure 11.The step identical with the broadcasting hand-off process of the guider 1 of first embodiment of the invention given identical symbol, mainly difference described.At first, setting is instructed based on the hand-off process of electric field strength in switching part 315.
In step S1101, judge lighting of signalling 102a～102d according to signal from signalling test section 91.When detecting the lighting of signalling 102a～102d, enter step S705.When not detecting the lighting of signalling 102a～102d, enter into step S708.In step S1102, judge lighting of signalling 102a～102d according to signal from signalling test section 91.Step S1102 is an affirmative determination when detecting the lighting of signalling 102a～102d, repeating step S1102.Step S1102 is a negative evaluation when not detecting the lighting of signalling 102a～102d, and enters into step S708.
The guider 9 of above second embodiment of the invention functions as follows effect.
(1) signalling 102a～102d light during, switch to 1 section broadcasting and fixing, so can prevent owing to switch and cause the digital broadcasting audiovisual obstacle to occur.
The guider 1,9 of above execution mode can carry out following distortion.
(1) by the lighting of detection side on recommendation paths 51 to the bigger crosspoint of conversion or detection signal device 102a～102d, detect in advance because the switching of 12 sections broadcasting and 1 section broadcasting causes the audiovisual of received terrestrial digital broadcasting the crosspoint of obstacle to occur thus, but also can detect with vibratory gyroscope 14a.That is, the going direction changing of vehicle when vehicle will enter the crosspoint detects this variation by vibratory gyroscope 14a and can detect vehicle thus and enter the crosspoint.
(2) the change signalling that need prevent the escort vehicle circuit is lighted, and the broadcasting of audiovisual is switched to 1 section broadcasting thus.Therefore, vehicle ' to the going direction changing of vehicle 51 more than or equal to the crosspoint 55,56 of predetermined angular before till the distance of regulation, and when lighting signalling 102a～102d, the broadcasting of audiovisual is switched to 1 section, and signalling 102a～102d light during be fixed as 1 section broadcasting.In addition, also can be fixed as 1 section broadcasting till by the crosspoint 55,56 of going direction changing more than or equal to predetermined angular.Figure 16 is the figure of this processing of explanation.For the flow chart of Figure 11, in step S1103, appended crosspoint that distance satisfies rated condition whether at predetermined distance with interior processing.
The 3rd execution mode
Figure 12 represents the structure of guider 120 of the 3rd execution mode of on-vehicle information generator of the present invention.Give identical symbol with the part that the guider 1 of first execution mode has, mainly difference is described.The guider 120 of the 3rd execution mode has data store 121.Data store 121 is made of rewritable recording mediums such as memory, hard disks, the needed data of various functions of storage guider 120.Suitably reading out in the data store 121 canned data by control circuit 11 goes forward side by side to exercise and uses.In addition, in data store 121, stored crosspoint electric field strength data, this crosspoint electric field strength storage the electric field strength of the broadcast wave of the received terrestrial digital broadcasting in each crosspoint on the road-map.
With reference to Figure 13 crosspoint electric field strength data are described.The crosspoint 131 on the road-map and the electric field strength 132 in this crosspoint in crosspoint electric field strength data 130, have been stored.The value that electric field strength 132 storages in each crosspoint 131 are measured in advance.And, by received terrestrial digital broadcasting acceptance division 19 detected electric field strength measured values, upgrade this electric field strength 132 when passing through this crosspoint according to vehicle at every turn.The measured value that the control circuit 11 of navigation device 120 sends by the tuner 34 detected electric field strength of received terrestrial digital broadcasting acceptance division 19.
With reference to Figure 14 the switching of moving and broadcasting of vehicle is described.Figure 14 represents that vehicle 141, vehicle are about to current path 142 and road-map 140. Road 143a, 143b, 144a～144c in road-map 140, have been shown.Vehicle 141 to be ready travelling and to pass through on the path 142 in crosspoint 145, crosspoint 146 and crosspoint 147.Vehicle 141 extracts the data of the electric field strength in crosspoint 145 from crosspoint electric field strength data 130 when arriving distance apart from crosspoint 145 and be the place 149 of predetermined distance.At this moment, in the value of this electric field strength during, the broadcasting of audiovisual is fixed as 1 section broadcasting less than setting.In addition, greater than setting the time, the electric field strength of the broadcast wave that receives according to antenna 31,32 is switched the broadcasting that receives.Then, when vehicle 141 had passed through crosspoint 145, the electric field strength of the broadcast wave that receives according to antenna 31,32 was switched the broadcasting that receives.
Here so-called setting is the electric field strength that might switch 1 section broadcasting and 12 sections broadcasting when vehicle turned the crosspoint.And, when the electric field strength in the crosspoint surpasses setting,, also can not reach the electric field strength 42 of Fig. 4 even vehicle produces change in the electric field strength of the broadcast wave of crosspoint turning antenna 31,32 receptions, 12 sections broadcasting are not switched to 1 section broadcasting.On the other hand, when the electric field strength in the crosspoint is less than or equal to setting, if vehicle produces change in the electric field strength of the broadcast wave that crosspoint turning antenna 31,32 receives, then be less than or equal to the electric field strength 42 of Fig. 4, might 12 sections broadcasting of audiovisual stably.
In addition, when vehicle 141 arrives distance apart from crossing 147 and is the place 1411 of predetermined distance, from crosspoint electric field strength 130, extract the data of the electric field strength in crosspoint 147.At this moment, than setting hour, the broadcasting of audiovisual is fixed as 1 section broadcasting in this electric field strength value.In addition, when bigger than setting, the electric field strength of the broadcast wave that receives according to antenna 31,32 is switched the broadcasting that receives.Then, when vehicle 141 had passed through crosspoint 147, the electric field strength of the broadcast wave that receives according to antenna 31,32 was switched the broadcasting that receives.
With reference to Figure 15, the broadcasting hand-off process of the guider 120 of the 3rd execution mode of on-vehicle information generator of the present invention is described.By the program that when having selected to switch the pattern of 12 sections not shown broadcasting and 1 section broadcasting, has begun, in control circuit 11, carry out the processing of Figure 15.Give identical symbol to the step identical, mainly difference is described with the broadcasting hand-off process of the guider 1 of first embodiment of the invention.
In step S1501, detect the current location of vehicle by current location checkout gear 14, extract the crosspoint that is positioned on the vehicle direct of travel from map data stored among DVD-ROM111, whether the distance that judging distance is positioned at the crosspoint on the vehicle direct of travel is less than or equal to setting.Step S1501 is an affirmative determination when being less than or equal to setting, enters step S1502.Step S1501 is a negative evaluation greater than setting the time, enters step S708.In step S1502,, extract the electric field strength 132 that is positioned at the crosspoint on the vehicle direct of travel with reference to stored crossing point electric field strength data 130 in data store 121.
In step S1503, judge whether the electric field strength 132 in this crosspoint is less than or equal to setting.Step S1503 is an affirmative determination when being less than or equal to setting, enters step S705.Greater than setting the time, enter step S708.In step S1504,, judge whether vehicle has passed through the crosspoint by the current location of current location checkout gear 14 detection vehicles.Step S1504 is an affirmative determination when having passed through the crosspoint, enters step S708.Repeating step S1504 when not passing through.
The guider 120 of above third embodiment of the invention functions as follows effect.
(1) can be according to crosspoint electric field strength data 130, learn the electric field strength that is positioned at the crosspoint on the vehicle direct of travel in advance, and can detect when turning this crosspoint the possibility of between 1 section broadcasting and 12 sections broadcasting, switching the broadcasting of audiovisual according to this electric field strength.Therefore, be fixed as 1 section broadcasting this moment, so can prevent owing to switch the situation that obstacle appears in the audiovisual of digital broadcasting.
With above-mentioned execution mode is example, can make multiple change under the situation that does not break away from the present invention's spirit scope.
Claims (9)
1. on-vehicle information generator has:
The receiving element of receiving digital broadcast;
If extraction unit is even extract electric field strength not high then the high-quality digital broadcasting and the low low-quality digital broadcasting that also can receive of electric field strength that can't receive from the digital broadcasting that receives;
The described high-quality digital broadcasting that extracts of output and any one the switch unit in the described low-quality digital broadcasting;
Detect the detecting unit that vehicle changes direction; With
Control unit when described detecting unit detects vehicle change direction, is controlled described switch unit, makes the output from described switch unit be fixed as described low-quality digital broadcasting.
2. on-vehicle information generator according to claim 1, wherein,
Described detecting unit detects vehicle and changes direction by detecting vehicle near the crosspoint that changes direction.
3. on-vehicle information generator according to claim 2, wherein,
Described control unit begins to make the output from described switch unit be fixed as described low-quality digital broadcasting to by the described switch unit of control till the described crosspoint near moment in described crosspoint from vehicle.
4. on-vehicle information generator according to claim 1, wherein,
Also have: the route searching unit that the recommendation paths to the destination is carried out route searching;
Detect the current on-site current location detecting unit of vehicle; With
Extract the crosspoint extraction unit that described vehicle changes the crosspoint of direction according to described recommendation paths,
Described detecting unit detects vehicle and changes direction by detecting by the place near the predetermined distance before the crosspoint that is extracted by described extraction unit, the current location of the detected vehicle of described current location detecting unit,
The moment in the place of the predetermined distance of described control unit before the approaching crosspoint that extracts by described extraction unit from vehicle, to described vehicle by during till the described crosspoint, control described switch unit, make output be fixed as described low-quality digital broadcasting from described switch unit.
5. on-vehicle information generator according to claim 1, wherein,
Also have the signalling that the situation of lighting that is arranged on the signalling on the vehicle is detected and light detecting unit,
Described detecting unit is lighted detecting unit by described signalling and is detected lighting of the signalling be arranged on the vehicle, and detect vehicle and change direction,
When described control unit detects vehicle change direction at described detecting unit, control described switch unit, make output be fixed as described low-quality digital broadcasting from described switch unit.
6. on-vehicle information generator according to claim 4, wherein,
Also have the signalling that the situation of lighting that is arranged on the signalling on the vehicle is detected and light detecting unit,
Described detecting unit detects near the place of predetermined distance before the crosspoint that is extracted by described extraction unit by the current location to the detected vehicle of described current location detecting unit, and light detecting unit by described signalling the lighting of signalling that is arranged on the vehicle detected, detect vehicle thus and change direction
When described control unit detects vehicle change direction at described detecting unit, control described switch unit, make output be fixed as described low-quality digital broadcasting from described switch unit.
7. on-vehicle information generator according to claim 1, wherein,
Also have: the current on-site current location detecting unit that detects vehicle;
Extraction is positioned at the crosspoint extraction unit in the crosspoint on the direct of travel of described vehicle; With
Stored the electric field strength memory cell of electric field strength of broadcast wave of the digital broadcasting in the described crosspoint that described vehicle will pass through in advance,
Described detecting unit detects vehicle and changes direction by detecting by the place near the predetermined distance before the crosspoint that is extracted by described crosspoint extraction unit, the current location of the detected vehicle of described current location detecting unit,
When the described electric field strength of described control unit in the described crosspoint that the described vehicle of being stored in advance by described electric field strength memory cell will pass through is less than or equal to setting, from described vehicle near this crosspoint before moment in place of predetermined distance begin to described vehicle by during till the described crosspoint, control described switch unit, make output be fixed as described low-quality digital broadcasting from described switch unit.
8. according to any described on-vehicle information generator in the claim 1 to 7, wherein,
The electric field strength detecting unit that also has the electric field strength of the broadcast wave that detects received terrestrial digital broadcasting,
Described switch unit is not when having to be fixed as from the output of described switch unit described low-quality digital broadcasting, when described electric field strength switches to described high-quality digital broadcasting during more than or equal to first setting, when being less than or equal to than little second setting of described first setting, described electric field strength switches to described low-quality digital broadcasting.
9. according to any described on-vehicle information generator in the claim 1 to 7, wherein, described high-quality digital broadcasting is 12 sections broadcasting of received terrestrial digital broadcasting, and described low-quality digital broadcasting is 1 section broadcasting of received terrestrial digital broadcasting.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005172295 | 2005-06-13 | ||
| JP2005172295 | 2005-06-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1882051A CN1882051A (en) | 2006-12-20 |
| CN100477751C true CN100477751C (en) | 2009-04-08 |
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ID=37520005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100879777A Expired - Fee Related CN100477751C (en) | 2005-06-13 | 2006-06-09 | Vehicular information providing device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100477751C (en) |
| DE (1) | DE102006027228B4 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102122999B (en) * | 2010-01-08 | 2014-11-05 | 阿尔派株式会社 | Vehicle-mounted electronic machine and information output method for vehicle-mounted electronic machine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3818575B2 (en) * | 2001-09-19 | 2006-09-06 | 株式会社日立製作所 | Digital broadcast receiver |
| JP3951729B2 (en) * | 2002-02-06 | 2007-08-01 | トヨタ自動車株式会社 | Digital broadcast receiver for vehicle |
| JP4110028B2 (en) * | 2003-04-07 | 2008-07-02 | トヨタ自動車株式会社 | DIGITAL BROADCAST RECEIVING DEVICE, DIGITAL BROADCAST RECEIVING METHOD, AND MOBILE BODY |
-
2006
- 2006-06-09 CN CNB2006100879777A patent/CN100477751C/en not_active Expired - Fee Related
- 2006-06-12 DE DE200610027228 patent/DE102006027228B4/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE102006027228A1 (en) | 2007-03-22 |
| CN1882051A (en) | 2006-12-20 |
| DE102006027228B4 (en) | 2013-07-11 |
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