JP3186330B2 - Traffic information receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information receiving apparatus , for example, used in a system for receiving mobile traffic information such as FM multiplex broadcasting.

[0002]

2. Description of the Related Art In recent years, digital data broadcasting of traffic information and the like for mobile bodies has been put into practical use. The digital data broadcasting, but in which in addition to coming map data also transmitted traffic information, it is possible to take several minutes time to newly receive information screen. Conventionally, such
In an information receiving device that receives digital data broadcasting
Is a new receiving operation every time the device is started up.
It takes time to receive the information and display it on the screen,
There is a problem that the operator is frustrated .

[0003]

Therefore, the power supply of the apparatus is stopped.
Starts the device if the previous information is stored in the memory in advance
The waiting time until the screen is displayed
It is thought that the problem that was solved is solved. However,
Even if the information immediately before the stop of the apparatus is previously stored in the memory as described above, since the dynamic information such as traffic information changes over time, the information that has been completed in the past can be displayed. For example, there is a problem that the operator obtains incorrect information. The present invention has been made in view of the above problems, when the apparatus is started, while as much as possible reduce the waiting time until information acquiring <br/>, which can obtain more accurate information Information It is intended to provide a receiving device .

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and according to the first aspect of the present invention, there is provided an information receiving apparatus for receiving and processing at least external information including traffic jam information. A storage unit capable of holding an information storage state relating to the received external information, and a time obtained after supplying power to the information receiving apparatus is set in advance with respect to a reception time when external information stored in the storage unit is received A storage erasing means for erasing at least the traffic congestion information stored in the storage means at that time when the predetermined time has elapsed. According to the second aspect of the present invention, in an information receiving apparatus having a receiving unit for receiving at least external information including traffic congestion information, an information storage state of the external information received by the receiving unit is associated with a reception time. Storage means capable of holding the information, turning off the power supply to the information receiving apparatus in a state where the information related to the external information is stored in the storage means,
Then, when the power supply is received again, the time obtained after the power supply has passed a predetermined time with respect to the reception time associated with the information related to the external information stored in the storage means. And a storage erasing means for erasing at least the traffic congestion information stored in the storage means from the storage means. According to a third aspect of the present invention, in the information receiving apparatus according to the first or second aspect, further, an instruction to output information is provided.
Means for outputting information in response to an output instruction from the instruction means.
Output means, and the output means is provided by the instruction means.
When an output instruction is received, it is stored in the storage means at that time.
The feature is to output information related to external information
I do. According to the fourth aspect of the present invention, at least
Receiving device that receives and processes external information including traffic congestion information
Holds the information storage state of the received external information
Possible storage means and the outside of the storage means
Display means for displaying information relating to the department information, and receiving the information
The time obtained after supplying power to the apparatus is stored in the storage means.
Is determined in advance with respect to the reception time when
If the specified time has elapsed, at least
When the traffic congestion information stored in the storage means
And a means for determining and disable the information display on the display means
It is characterized by the following. According to the fifth aspect of the present invention, external information including at least traffic congestion information is received and processed.
In the information receiving device, the information record related to the received external information
Storage means capable of holding a storage state, and a display means for displaying information
And the external information stored and held in the storage means.
Control means for causing the display means to display information;
The time obtained after the power is supplied to the information receiving device is the storage means.
The reception time when the external information stored in the
Determine whether a predetermined time has elapsed
Determining means, wherein the control means
At least until it is determined that the predetermined time has elapsed.
Also relates to the traffic congestion information stored in the storage means at that time.
Displaying information on the display means.
You. According to a sixth aspect of the present invention, in the information receiving apparatus according to any one of the first to fifth aspects, the external information is periodically received, and the newly received external information is already stored in the storage unit. If the newly received external information has the content to be updated from the comparison with the external information stored in the storage unit, the update unit updates and updates the storage content of the storage unit to the newly received external information. It is characterized by further comprising storage means. According to a seventh aspect of the present invention, in the information receiving apparatus according to any one of the first to sixth aspects, the information receiving apparatus is mounted on a moving body, and a power supply is provided in conjunction with turning on and off an ignition switch of the moving body. Is supplied and the information receiving apparatus is activated .

[0005]

According to the first and second aspects of the present invention, when the power is supplied and the apparatus is started, the time obtained after the power is supplied is compared with the reception time of the stored external information. When a predetermined time has elapsed, at least the traffic jam information stored at that time is deleted, so that particularly old traffic jam information can be suitably deleted. According to claim 4 of the present invention,
The time obtained after the power is supplied is when the stored external information is received
When a predetermined time has elapsed for the time
At least according to the traffic jam information stored at that time.
Adopt a configuration that determines that the information display on the display means is invalid,
According to the fifth aspect of the present invention, after power is supplied,
The received time is set in advance with respect to the reception time of the stored external information.
Until it is determined that the predetermined time has passed,
At least the display hand related to the traffic jam information stored at that time
A configuration that allows information to be displayed on the column is adopted. Therefore , according to the present invention , particularly with regard to traffic congestion information, there is an excellent effect that it is possible to obtain more accurate information while minimizing the waiting time until acquiring the information when the apparatus is started.

[0006]

[0007]

FIG. 1 is a block diagram showing an embodiment of the present invention. This configuration includes an antenna 10 as a receiving unit, a receiver 20 as an extracting unit, a battery power source 40 as a storage and holding unit, and a display unit 30 as a display unit. A broadcast program including dynamic information whose information content changes within a predetermined time and traffic information including static information whose information content does not change even after the predetermined time has been received and processed by the receiver 20. Receiver 20
Extracts only traffic information.

[0008] The received traffic information is transmitted to the receiver 20.
And is transmitted to and displayed on the display unit 30 as necessary. The receiver 20 and the display unit 30 are driven by power supply from a battery power supply 40,
In particular, the memories 25 and 26 and the clock 27 in the receiver 20 are configured to be supplied with power even when the ignition switch is turned off (engine off).

The details of the above configuration will be described below. The receiving section 22 separates a broadcast program input from the antenna 10 into audio information and traffic information multiplexed therewith, and separates the traffic information into an information identifying section 23. Send to Here, the traffic information includes static information and dynamic information, and the static information is information such as map data and intersection information that does not change in the content for a long time. The dynamic information is information that changes in a short time, such as traffic congestion information, accident information, regulation information, parking lot information (position and fullness), and caution information.

The information identifying unit 23 identifies whether the traffic information output from the receiving unit 22 is static information or dynamic information. FIG. 5 shows an example of the structure of the traffic information data to be broadcast. In the broad category, whether the information is traffic information or information other than traffic information (for example, general character information such as news and weather forecast) ) Can be identified. Since information such as traffic congestion, accidents, regulations, and the like can be identified by the small classification, identification of static information or dynamic information is also performed. Here, the general character information such as the news and weather forecast is classified as static information.

The information writing / reading unit 24 inputs the static information and the dynamic information identified by the information identifying unit 23,
The dynamic information is written in the first memory 25, and the static information is written in the second memory 26. The first memory 25 further includes:
The time at which the dynamic information is written is also stored. The time is updated every time the dynamic information is written, and the time at which the information was last written is always stored. Then, when it becomes necessary to display traffic information on the display unit 30 described later, the information is read from one of the memories 25 and 26 and transmitted to the display unit.

The writing of information into the first memory 25 and the second memory 26 is performed unconditionally if the traffic information is newly received. If the same information as the received information has already been written in the first memory 25 and the second memory 26, the received traffic information is discarded. The information transmitted from the broadcasting station has an information update flag (within the sub-category of FIG. 5).
5 and the traffic information in the first memory 25 and the second memory 26 is rewritten when the updated information is received even if the information is the same as the information written in the second memory 26. The old information before the update is deleted.

For reading information from the first memory 25 and the second memory 26, if there is a request for information display from the driver, the request information is read as needed and transmitted to the display unit. The first memory 25 and the second memory 26 store dynamic information and static information, respectively. As described above, the memories 25 and 26 always store the latest information. Also, a first memory 25 and a second memory 26
Is configured so that the battery power supply 40 is supplied even when the ignition switch is turned off, so that the stored information is not lost.

The clock 27 is an internal clock of the receiver 20. Like the first memory 25 and the second memory 26, the clock 27 is also used when the ignition switch is turned off.
Since 0 is supplied, the time is always correct. The time comparison unit 28 compares the time of the clock (current time) with the time of the last reception of the dynamic information written in the first memory 25, and calculates the time difference. The timing for comparison is when the ignition switch is switched from off to on. The last received time is the time when the dynamic information is stored in the first memory 25 as described above.
This is the time that is stored simultaneously, and always stores the time that the dynamic information was last written to the first memory 25.

Next, it is determined whether or not the calculated time difference is equal to or longer than a predetermined time. If it is longer than a predetermined time, the first
The traffic information written in the memory 25 is erased. If the time is less than the predetermined time, the traffic information remains written in the first memory 25 without any processing.

That is, if a predetermined time has elapsed between turning off the ignition switch and turning on the ignition switch next time, the stored and held dynamic information is deleted. Here, the predetermined time is determined in consideration of the time when it is considered that the contents of the dynamic information may become invalid.

The battery power supply 40 supplies power to the receiver 20 and the display unit 30 when the ignition switch is turned on. However, the first memory 25 and the second memory 2
The power is supplied to the watch 6 and the timepiece 27 even when the ignition switch is turned off. The display unit 30
Is intended to display information outputted from the receiver 20,
It is a monitor screen such as a CRT and an LCD.

Next, the operation of the embodiment of the present invention will be described.
FIG. 2 is a flowchart showing the operation of the embodiment of the present invention. This flowchart starts processing when the ignition switch is turned on from the off state. Steps 101 to 103 show the preparatory processing of the main operation. In step 101, when the ignition switch is turned on, the current time is read from the clock 27 in FIG. Reads the last received time of the written dynamic information. Then, the above two times are subtracted to obtain a time difference. As described above, the time when the last dynamic information was received and written is stored in the first memory 25 in addition to the dynamic information itself. If the first memory 25
If no information has been written to the
The processes from 1 to 103 are not performed. That is, in step 101, it is calculated how long the ignition switch has been turned off in step 101.
In step 2, it is determined whether or not the time difference calculated in step 101 is equal to or longer than a predetermined time. Conversely, in step 102, it is determined whether or not the ignition switch has been turned off for a predetermined time.

In Step 103, Step 10
If the determination in step 2 is Yes, the dynamic information backed up in the first memory 25 is cleared. That is, the predetermined time used in the determination in step 102 is a time determined in consideration of a time in which the content of the dynamic information is considered to be invalid, and when the predetermined time has elapsed. The stored and retained dynamic information may be invalid and is erased to prevent the driver from transmitting old uncertain information. If the determination in step 102 is No, the process proceeds to step 104. That is, the first memory 2
5, the contents of the dynamic information stored and held are determined to be valid. Displaying this information saves the waiting time until the same information is received again. This is the end of the preparatory processing. Step 101 to Step 1
The processes up to 03 are performed by the time comparison unit 28 in FIG.

Subsequently, in step 104, a broadcast program including traffic information is received. In step 105, whether the received information is static information or dynamic information is determined by the information identifying unit 23 in FIG. Judgment. As described above, in the data structure of the information transmitted from the broadcasting station,
Since there is identification information such as traffic congestion information, accident information, regulation information, and parking lot information (see FIG. 5), static information and dynamic information can be identified. Note that the processing of step 104 and step 105 can be performed in parallel with the processing of step 101 to step 103.

As a result of the determination in step 105, in step 106, the dynamic information is written to the first memory 25, and in step 107, the static information is written to the second memory 26. As described above, newly received information is written unconditionally, and if information of the same content has already been written, this processing is not performed. The information whose contents have been updated is rewritten, and only the latest information that can be received is always stored in the first memory 25 and the second memory 26.

Next, at step 108, it is determined whether the ignition switch (engine) is on or off. If the determination in step 108 is ON (that is, No), the processing from step 104 is repeated. If it is off (that is, Yes), this flowchart ends. When this flowchart ends,
The information receiving process stops. However, the information in the memory is stored and held by the power supply from the battery power supply 40.

The effect of the above embodiment will be described. If the driver stops the engine (ignition switch is turned off) for a short time (less than a predetermined time) such that the content of the dynamic information does not change, Dynamic information received before the engine stopped can be displayed without waiting time. In addition, if the engine is stopped for a period of time (predetermined time or longer) in which it is considered that the contents of the dynamic information may change, erroneous information is transmitted to the driver in order to clear the dynamic information. Nothing. Since the static information is stored and held in any case, the content can be displayed immediately after the engine is started.

Next, a modification of the above embodiment will be described. FIG. 3 shows a configuration of the modified example. This configuration is shown in FIG.
And a solar cell 50 is added to the above configuration. The components having the same reference numerals as those in FIG. 1 have the same configurations as those in FIG.
The description is omitted.

The solar cell 50 supplies power to the receiving unit 22, the information identifying unit 23, and the information writing / reading unit 24. Also, as in the configuration of FIG.
5, 26 and the clock 27 are always supplied with power from the battery 40. Therefore, in this configuration, the reception process of the broadcast program including the traffic information is continued even after the ignition switch is turned off.

FIG. 4 is a flow chart showing the operation of the above-described configuration. Since the processing from step 101 to step 108 is the same as the processing shown in FIG. 2, the description thereof will be omitted. When it is determined in step 108 that the ignition switch is off, in step 119,
It is determined whether or not the power from the solar cell 50 is being supplied. The power supply from the solar cell 50 is to the receiving unit 22, the information identifying unit 23, and the information writing / reading unit 24 in FIG. In the case of Yes in the processing of Step 109, the processing of Step 104 and thereafter is repeated. If No, this flowchart ends.

The effect of the present modification will be described. Even when the engine is stopped (ignition switch is turned off), broadcast programs including traffic information are continuously received as long as the solar battery can supply power. Therefore, the latest information is always written in the memory. The next time the driver starts the engine, the latest information can be displayed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is an operation flowchart of FIG.

FIG. 3 is a configuration diagram of a modification when a solar cell is used.

FIG. 4 is an operation flowchart of a modified example when a solar cell is used.

FIG. 5 is a diagram illustrating a data configuration example of traffic information.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 20 ... Receiver, 22 ... Receiving part, 24 ... Information writing / reading part, 23 ... Information identification part, 25 ... First memory, 2
6 second memory, 27 clock, 28 time comparison unit, 3
0: display unit, 40: battery power.

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hiroho Fukaya 1-1-1, Showa-cho, Kariya-shi, Aichi Japan Inside Denso Corporation (72) Inventor Kazumasa Natsume 1-1-1, Showa-cho, Kariya-shi, Aichi Japan Japan Denso Inside (72) Inventor Joe Fujiwara 1-1, Showa-cho, Kariya-shi, Aichi Japan Inside Denso Co., Ltd. (56) References JP-A-6-311065 (JP, A) JP-A-1-195727 (JP, A) JP-A-55-66145 (JP, A) JP-A-3-6129 (JP, A) JP-A-1-47129 (JP, U) JP-A-64-48944 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) H04B 1/16 H04H 1/00 H04B 7/26 103

Claims (7)

(57) [Claims] 1. An information receiving apparatus for receiving and processing external information including at least traffic congestion information, comprising: a storage unit capable of holding an information storage state relating to the received external information; and a time obtained after power is supplied to the information receiving apparatus. When a predetermined time has elapsed with respect to the reception time when the external information stored in the storage unit is received, at least the traffic jam information stored in the storage unit at that time is stored in the storage unit. And a storage erasing means for erasing the information. 2. An information receiving apparatus having receiving means for receiving external information including at least traffic congestion information, wherein: a storage means capable of holding an information storage state of the external information received by the receiving means in association with a reception time; When the power supply to the information receiving device is turned off in a state where the information relating to the external information is stored in the storage unit, and then the power supply is received again, the time obtained after the power supply is stored in the storage unit. When a predetermined time has elapsed with respect to the reception time associated with the information related to the stored external information, at least the traffic jam information stored in the storage unit at that time is deleted from the storage unit. An information receiving apparatus, comprising: a storage erasing unit. 3. An instructing means for issuing an information output instruction,
An output means for outputting information in response to the output instruction of the instruction means;
A step, wherein the output unit receives an output instruction from the instruction unit
At this time, the external information stored in the storage means is
3. The information output device according to claim 1, wherein:
The information receiving device according to any one of the above. 4. Receiving external information including at least congestion information
In the information receiving apparatus to be processed, storage capable of holding the information storage state related to the received external information
Means and an information table relating to external information stored and held in the storage means
Display means for displaying the information and the time obtained after the power is supplied to the information receiving apparatus.
At the reception time when the external information stored in the storage device is received
If a predetermined period of time has passed,
At least the traffic congestion information stored in the storage means at that time.
To judge that the information display on the display means pertaining to the report is invalid
An information receiving device comprising: a step; 5. Receiving external information including at least traffic congestion information
In the information receiving apparatus to be processed, storage capable of holding the information storage state related to the received external information
Means, display means for displaying information, and an information table relating to external information stored and held in the storage means
Control means for causing the display means to perform the indication, and the time obtained after power is supplied to the information receiving apparatus.
At the reception time when the external information stored in the storage device is received
It is determined whether or not a predetermined time has elapsed.
Determining means for determining that the predetermined time has elapsed by the determining means.
Until it is determined that the
To the display means related to the traffic jam information stored in the means.
An information receiving device, which allows information display. 6. A method for receiving the external information periodically and comparing the newly received external information with the external information already stored in the storage means to determine whether the newly received external information should be updated. 6. An apparatus according to claim 1, further comprising an update storage unit for updating and storing the storage content of said storage unit to said newly received external information when the external information has been stored.
The information receiving device according to any one of the above. 7. The information receiving apparatus according to claim 1, wherein the information receiving apparatus is mounted on a moving body, and is supplied with power in conjunction with turning on and off an ignition switch of the moving body. An information receiving device according to any one of the claims .