JP3490875B2 - Receiving machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver mounted on a mobile body.

[0002]

2. Description of the Related Art In recent years, receivers such as radio receivers and television receivers mounted on mobile bodies including cars and ships are provided with a so-called preset function so that an operator can easily perform tuning. It is becoming mainstream. In a receiver having a preset function, a service area of a broadcasting station and a transmission frequency of the broadcasting station are associated with each other, and preset data is stored in a memory in each region in advance, and the stored broadcasting station name is moved. Means are provided for the operator of the body to specify. When making this receiver receive the broadcast wave representing the broadcast program transmitted from the operator's desired broadcast station, the operator only specifies the name of the desired broadcast station, and the receiver itself is the specified broadcast station. The transmission frequency of the receiver is read from the memory, and tuning is performed based on the transmission frequency to automatically match the reception frequency of the receiver to the transmission frequency.

In addition, a receiver having a preset function is currently used in the receiver in order to simplify tuning and to keep listening to the same broadcast program when the mobile unit moves over a plurality of service areas. There is a method in which a broadcast station whose current position is in the service area is checked using the position and preset data, and tuning is performed using the transmission frequency of the broadcast station. As a conventional technique of such a receiver, there is a radio receiver disclosed in Japanese Patent Laid-Open No. 4-167827. This radio receiver is used to display the name of the broadcasting station in the area including the current position.
m; hereinafter, abbreviated as GPS), and a storage device that stores the positions of transmitting antennas of a plurality of broadcasting stations.
The name of the broadcasting station whose transmission antenna location is the closest to the current location measured by the GPS receiver is displayed.

In this conventional radio receiving apparatus, the name of the broadcasting station selected according to the distance between the current position and the position of the transmitting antenna is displayed as, for example, the broadcasting station that can most stably receive the broadcast wave. . In this case, for example, a broadcasting station that broadcasts a broadcast program that the operator wants to listen to, a road used by the operator, and a time slot for listening to the program are different for each operator. Furthermore, the propagation state of electromagnetic waves is determined by a complex combination of a plurality of factors, and changes intricately depending on the combination. This factor includes the positional relationship between the position of the receiver and the boundary of the service area of the broadcasting station, the topography and presence of buildings at the position where the receiver is located, the frequency band of the broadcast wave to be received, and the reception of the broadcast wave. The electromagnetic wave propagation status changes from moment to moment due to changes in each factor. In particular, when a broadcast wave from a broadcasting station in the service area is received at the boundary of the service area and its vicinity, the reception state changes drastically due to the topography of the position where the receiver is located. As a result, the broadcast wave of the broadcasting station with the shortest distance between the current position and the location of the transmitting antenna cannot always be received most stably. Conversely, even if the position of the receiver is outside the service area, it may be possible to receive the broadcast wave satisfactorily.

Further, in the above-mentioned receiver having the preset function, the preset data is generally set in the factory at the time when the receiver is created. This existing preset data includes road information radio stations and community broadcasts whose service area is smaller than that of a local broadcasting station whose service area is smaller than a general service area, for example, the service area of a radio station and a television broadcasting station. Station preset data is often not stored. Also, when a new broadcasting station of local broadcasting or radio broadcasting and television broadcasting is opened, preset data of the broadcasting station is not stored in the memory, so that the broadcasting wave of the broadcasting station cannot be received by the preset function. difficult. In these cases, in order for the receiver to receive the broadcast waves of the local broadcasting station and the new broadcasting station by the preset function, the operator needs to know the transmission frequency and service area data of those broadcasting stations in advance. You have to enter a new one. Therefore, it takes time to receive the broadcast waves of these broadcasting stations.

When one broadcasting station has a plurality of transmitting stations, the broadcasting waves representing the same broadcast program are transmitted from the plurality of transmitting stations. In this case, generally, the receiver having the conventional preset function generally stores only the preset data of the master station transmitting station. In order to receive the broadcast wave of the slave station transmitting station whose service area is smaller than that of the master station transmitting station by the preset function, each operator confirms the location and transmission frequency of the slave station transmitting station and searches for the preset data, It is necessary to store the searched preset data in the memory. Since it takes a lot of time to confirm the location of the transmitting stations, it takes time to receive the broadcast waves from these transmitting stations.

Furthermore, among electromagnetic waves, for example, A
The propagation state of the medium wave used for the M radio voice broadcasting changes depending on the difference between day and night. Therefore, an AM radio audio broadcast receiver may be able to receive a broadcast wave from a long-distance broadcasting station, which is difficult to receive during the daytime at the current position, at the current position at night. In addition, the propagation state of the ultra-high frequency wave used for FM radio audio broadcasting changes depending on the season. In addition, when there is a flying object in the sky or when there is a meteor, these incidental factors may cause incidental reflection of ultrashort waves, which may travel farther than the line-of-sight distance that should be transmitted. Therefore, an FM radio audio broadcast receiver may be able to receive at its current position a broadcast wave from a long-distance broadcasting station that is difficult to receive at the current position in spring, autumn, and winter. . For these reasons, the broadcast wave that the receiver was able to receive at least once at the current position should always be stably received at that position regardless of changes in the propagation conditions due to time, season, and accidental factors. It is generally difficult for the operator to judge whether or not it is possible.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to be able to receive an electromagnetic wave transmitted from a broadcasting station by using a preset function according to a usage mode of an operator, and further to receive condition data used for the preset function. It is to provide a receiver that can be automatically set.

[0009]

The present invention is directed to a receiving means for receiving an electromagnetic wave, a position measuring means for measuring the position of the receiving means, and a propagation condition detection for detecting a propagation condition for grasping the propagation state of the electromagnetic wave. Means and a frequency of an electromagnetic wave transmitted from a plurality of broadcasting stations, a position of the receiving means capable of receiving each electromagnetic wave, and a propagation condition for receiving the electromagnetic wave at the position, are associated with each other, and are set as reception conditions. Among the reception condition storage means to be stored and the reception condition stored in the reception condition storage means, the position is equal to the position measured by the position measuring means, and the propagation condition is the propagation condition detected by the propagation condition detecting means. Reception control means for selecting equal reception conditions and causing the reception means to receive the electromagnetic wave having the frequency of the selected reception condition, and the frequency of the electromagnetic waves transmitted from the plurality of broadcasting stations. An electromagnetic wave having an existing frequency within a predetermined frequency band is received by the receiving means, and the frequency of the received electromagnetic wave, the position measured by the position measuring means at the time of receiving the electromagnetic wave, and the propagation condition detecting means at the time Out of a predetermined transmission area to which the broadcast station should transmit an electromagnetic wave, among the learning control means for storing the propagation condition as the reception means in the reception condition storage means and the reception condition stored in the storage means. And an erasing means for selecting and erasing a reception condition including a propagation condition for propagating an electromagnetic wave up to and for grasping a predetermined propagation state in which the generation rate thereof increases and decreases over time. It is a receiver.

According to the present invention, the receiver stores a plurality of reception conditions in the reception condition storage means in advance, and the reception control means detects the position of the receiver measured by the position measurement means and the propagation condition detection means. Select one of a plurality of reception conditions based on the propagation condition for estimating the current propagation condition of the electromagnetic wave detected by, and receive the electromagnetic wave of the frequency of the selected reception condition by the receiving means. Let As a result, the receiver can always stably receive the electromagnetic wave even when the propagation state of the electromagnetic wave changes due to the time of day and the season and the receiver moves.
Therefore, the user of the receiver can cause the receiver to receive electromagnetic waves without performing complicated operations even when the position and the propagation state change. Further, by adding the propagation condition to the reception condition, the failure of reception due to the change of the propagation state is less likely to occur, so that the reliability of the reception condition can be improved.

[0011]

The learning control means operates as described above,
Automatically learn reception conditions. This allows the receiver to automatically set and store the reception conditions in response to changes in the receiver position and propagation conditions. therefore,
The reception condition can be learned for each operator individually according to the usage mode of the receiver of the operator. For example, the reception conditions of a newly opened broadcasting station and local broadcasting stations and slave station transmitting stations can be automatically learned.
Further, it is possible to simplify the labor of the operator of the receiver when the reception condition is stored in the reception condition storage means.

Further, the learning control means sets a reception condition by adding a propagation condition to the position of the receiver included in the preset data of the conventional receiver and comprehensively evaluating the position and the propagation condition. . As a result, even when the position of the receiver is outside the transmission range in which the broadcast station transmits broadcast waves, that is, outside the service area, electromagnetic waves from the broadcast station can be received due to the propagation state and the position of the receiver. In some cases, the reception condition of the electromagnetic wave of the broadcasting station at that position can be set and stored.

From the above, the number of broadcasting stations for which the reception condition is set is larger than the number of broadcasting stations for which the preset data is set in the conventional receiver. Therefore, the reception control means can select the broadcasting station more finely than the receiver of the prior art.

The receiver has the erasing means, and erases the reception conditions including the above-mentioned propagation conditions for grasping the propagation state among the reception conditions stored in the storage means by the learning control means, for example. This is for the following reason. For example, if the occurrence rate of the propagation state increases or decreases over time, for example, with the transition of the season, the propagation state occurs and the electromagnetic waves reach outside the transmission area when the occurrence rate increases. The control means can set and store the reception condition of the electromagnetic wave outside the transmission area. However, since the propagation state is unlikely to occur at the time when the occurrence rate decreases, the electromagnetic wave does not easily reach the position where the reception condition is set. Therefore, even if the reception control unit tries to cause the reception unit to receive the electromagnetic wave using the reception condition, it becomes difficult to receive the electromagnetic wave. Therefore, such a reception condition of the electromagnetic wave becomes less reliable as it is viewed over time. Therefore, by deleting such a reception condition later, the reliability of the reception condition stored in the storage unit can be improved.
Further, when the reception condition is stored only for electromagnetic waves that can be continuously received a plurality of times, the reception condition may be stored if the occurrence rate of the propagation condition is high at the time when the electromagnetic wave is set. In this case, by deleting the reception condition using the above-mentioned deletion means after storing the reception condition,
The reliability of reception conditions can be further improved. Further, the present invention, a receiving means for receiving an electromagnetic wave, a position measuring means for measuring the position of the receiving means, a propagation condition detecting means for detecting a propagation condition for grasping the propagation state of the electromagnetic wave,
Reception in which frequencies of electromagnetic waves transmitted from a plurality of broadcasting stations are associated with positions of receiving means capable of receiving the respective electromagnetic waves and propagation conditions for receiving the electromagnetic waves at the positions, and stored as reception conditions In the condition storage means and the reception condition stored in the reception condition storage means, a reception condition in which the position is equal to the position measured by the position measurement means and the propagation condition is equal to the propagation condition detected by the propagation condition detection means And a reception control unit that causes the reception unit to receive an electromagnetic wave having a frequency of the selected reception condition, and an electromagnetic wave having a frequency within a predetermined frequency band in which the frequencies of the electromagnetic waves transmitted from the plurality of broadcasting stations exist. The position measured by the position measuring device at the time of receiving the electromagnetic wave by the receiving device and the propagation condition detected by the propagation condition detecting device at the time. In the same position and the same propagation conditions as the above, the receiving means determines again whether or not the electromagnetic wave of the frequency can be received a plurality of times continuously, and when the plurality of continuous reception is performed, the frequency and the position A learning control unit that stores the propagation condition in the reception condition storage unit as a reception condition and does not store the frequency, the position, and the propagation condition in the reception condition storage unit when the reception condition is not received a plurality of times. It is a receiver characterized by including including.

According to the present invention, when learning the reception condition, the learning control means grasps the position and the propagation state at the time when the electromagnetic wave is received once, and a plurality of electromagnetic waves having the same frequency are found at the position and the propagation condition. It is determined whether it can be received again. Thereby, it is possible to determine whether the electromagnetic wave is accidentally received. This is for the following reason. The case where the electromagnetic wave is received accidentally is, for example, the case where the electromagnetic wave is propagated outside the transmission range of the broadcasting station and the receiver is outside the transmission range. Since this electromagnetic wave is received only when the atmosphere reaches the above-mentioned propagation state, it is difficult to always receive this electromagnetic wave stably, that is, to receive it at the same position regardless of the propagation state. This electromagnetic wave is unlikely to be continuously received multiple times if it is attempted to be received at the same position irrespective of the propagation conditions. It is possible to automatically determine whether or not it has been received.

Further, the learning control means sets and stores the reception condition only for the electromagnetic waves that can be received a plurality of times. With this, it is possible to prevent the reception condition of the electromagnetic wave, which is difficult to be stably received at all times, from being stored in the reception condition storage means. Further, since the electromagnetic wave from the broadcasting station whose position is within the transmission range can be continuously received a plurality of times, the reception condition of this electromagnetic wave can be stored. Therefore, it is possible to automatically learn the newly opened broadcasting station and the reception conditions for the existing local broadcasting station and reception station where the reception condition is not set. Thus, when the receiving means is made to receive the electromagnetic wave using the receiving condition stored in the receiving condition storage means, the electromagnetic wave can be reliably received. Therefore, the reliability of the set reception condition can be improved.

Further, according to the present invention, of the reception conditions stored in the storage means, the electromagnetic wave is propagated to the outside of a predetermined transmission area in which the broadcasting station should transmit the electromagnetic wave, and the generation rate thereof changes with time. It is characterized by further including an erasing means for selecting and erasing a reception condition including a propagation condition for grasping a predetermined propagation state that increases or decreases.

According to the present invention, the receiver has the erasing means, and includes the propagation condition for grasping the above-mentioned propagation state among the reception conditions stored in the storage means by the learning control means, for example. Delete the reception conditions. This is for the following reason. For example, if the occurrence rate of the propagation state increases or decreases over time, for example, with the transition of the season, the propagation state occurs and the electromagnetic waves reach outside the transmission area when the occurrence rate increases. The control means is
The reception condition of the electromagnetic wave can be set and stored outside the transmission area. However, since the propagation state is unlikely to occur at the time when the occurrence rate decreases, the electromagnetic wave does not easily reach the position where the reception condition is set. Therefore, even if the reception control unit tries to cause the reception unit to receive the electromagnetic wave using the reception condition, it becomes difficult to receive the electromagnetic wave. Therefore, such a reception condition of the electromagnetic wave becomes less reliable as it is viewed over time. Therefore, by deleting such a reception condition later, the reliability of the reception condition stored in the storage unit can be improved.

Further, when the reception condition is stored only for the electromagnetic waves that can be continuously received a plurality of times, the reception condition may be stored if the occurrence rate of the propagation condition is high at the time when the electromagnetic wave is set. . In this case, the reliability of the reception condition can be further improved by erasing the reception condition using the above-mentioned erasing means after storing the reception condition.

According to the present invention, the propagation condition detecting means is
The condition to be detected as the propagation condition is changed to a condition for estimating a temporal change of a propagation state of a propagation path for propagating the electromagnetic wave of the frequency, based on the frequency of the electromagnetic wave received by the receiving unit. To do.

According to the invention, the propagation condition detecting means changes the condition to be detected as the propagation condition according to the frequency of the electromagnetic wave. This is for the following reason. For example, the change in the propagation state of the electromagnetic wave corresponds to which of a plurality of propagation paths of the electromagnetic wave in the atmosphere propagates the electromagnetic wave. Some propagation paths that propagate the electromagnetic wave of each frequency propagate the electromagnetic wave exceptionally according to a factor that changes with time. This exceptional propagation path differs depending on the frequency of the electromagnetic wave, and the factors that cause the propagation path to propagate the electromagnetic wave differ for each propagation path. Therefore, for each frequency, by setting the condition for inferring the factor of the exceptional propagation path of the electromagnetic wave of the frequency as the propagation condition, the response of the propagating of the electromagnetic wave of the frequency of the exceptional propagation path , The reception conditions can be set. Therefore, when the receiver receives electromagnetic waves in a plurality of frequency bands, for example, medium waves and ultrashort waves, it is possible to reliably infer the factors of the exceptional propagation paths of the electromagnetic waves in each frequency band. Therefore, the reliability of the electromagnetic wave reception conditions in both frequency bands can be improved together.

Further, the present invention is characterized in that the electromagnetic wave is an ultrashort wave, and the propagation condition represents whether or not the season at the time of receiving the electromagnetic wave is summer.

According to the present invention, when the electromagnetic wave is an ultra-short wave, the propagation condition detecting means detects a seasonal difference as a propagation condition. This is for the following reason. For example, when the sporadic E layer is generated, the propagation of the ultra-short wave changes, and the ultra-short wave propagates to a distance equal to or longer than the original line-of-sight distance. Since this sporadic E layer mainly occurs in summer,
This change in propagation conditions occurs almost all summer. Therefore, if it is decided to distinguish whether it is summer or other depending on the propagation condition, the reception condition is that of the electromagnetic wave reflected and transmitted to the sporadic E layer, direct wave and ground as usual. It is possible to determine whether or not the electromagnetic wave is transmitted as a reflected wave.

Therefore, for example, Sporadic E
The reception conditions of the electromagnetic waves transmitted by the layers can be discriminated after being stored and erased by the erasing means. Further, it is possible to determine whether to use the reception condition of the electromagnetic wave transmitted by the sporadic E layer, in response to whether or not the reception means receives the electromagnetic wave in summer. As a result, since this reception condition is used only in summer when the sporadic E layer is likely to occur, it is possible to prevent electromagnetic waves from not being received by using this reception condition in spring, autumn, and winter. Therefore, it is possible to improve the reliability of the reception condition of the ultra-high frequency.

Further, the present invention is characterized in that the electromagnetic wave is a medium wave, and the propagation condition represents whether the time when the electromagnetic wave is received is daytime or night.

According to the invention, when the electromagnetic wave is a medium wave, the propagation condition detecting means detects the difference between day and night as the propagation condition. This is for the following reason. Medium wave
In the daytime, it propagates as ground waves and space waves, and at night, it propagates as ionospheric waves in addition to ground waves and space waves. Electromagnetic waves travel farther as ionospheric waves than as ground waves and space waves, so they travel farther at night than during daytime. Therefore, if the difference between day and night is distinguished according to the propagation condition, it is possible to determine whether the reception condition is the electromagnetic wave transmitted in the daytime or the electromagnetic wave transmitted in the nighttime. In addition, the reception control means can use different reception conditions depending on whether the time of receiving the electromagnetic wave is daytime or nighttime. It is possible to receive an electromagnetic wave from a broadcasting station farther than the broadcasting station that enables it. Therefore, at night, the number of broadcasting stations that can be received at the current location can be increased. As a result, the reception condition can be set finely according to the usage mode of the operator.

Further, the present invention is characterized in that the position measuring means is a global positioning system receiver.

According to the invention, the position measuring means is GPS
It is realized by the receiver. The GPS receiver can detect the position of the receiver by latitude and longitude with higher accuracy than other position measuring methods. Therefore, by setting the reception condition based on the position measured by the GPS receiver, it is possible to improve the accuracy regarding the position of the reception condition.

According to the present invention, the reception condition storage means is
It is a nonvolatile memory capable of writing and erasing data.

According to the present invention, the reception condition storage means is realized by a writable / erasable nonvolatile memory. This non-volatile memory can retain its stored contents without being supplied with power, and therefore does not consume power only for holding the reception condition. Therefore, the power consumption of the receiver can be reduced as compared with the case where another memory is used.

[0032]

1 is a block diagram showing an electrical configuration of a receiver 1 according to an embodiment of the present invention. The receiver 1 is a receiver mounted on a mobile body, receives broadcast waves having frequencies in a plurality of frequency bands, and reproduces broadcast programs from the received broadcast waves. The broadcast wave is an electromagnetic wave transmitted from a predetermined broadcasting station and used for broadcasting a broadcast program. In the present embodiment, it is assumed that a broadcast wave of AM (amplitude modulation) radio broadcast that is a medium wave and a broadcast wave of FM (frequency modulation) radio broadcast that is an ultra-short wave are received and reproduced. The receiver 1 also has a preset function. The preset function means that when the operator of the receiver 1 specifies any one of a plurality of broadcasting stations that the receiver 1 can receive,
This is a function in which the receiver 1 itself automatically performs tuning so that the receiver 1 can receive the broadcast wave of the broadcasting station. The receiver 1 includes an input / output device 3, a receiving device 4, a position measuring device 5, a storage device 6, and a central processing unit 7.

The input / output device 3 is provided for the operator to designate a broadcasting station to be received from a plurality of broadcasting stations and its transmission frequency. The transmission frequency is the frequency of the carrier wave of the broadcast wave and is predetermined for each broadcasting station. The input / output device 3 includes an operation unit 17 realized by, for example, a key matrix, and a display unit 18 realized by, for example, a liquid crystal display device.

The receiving device 4 generally receives a broadcast wave, demodulates the received broadcast wave, and reproduces a broadcast program. The receiving device 4 includes a tuner antenna 11 and a tuner unit 1.
2 and the speaker 13. The tuner unit 12 is composed of one or a plurality of tuners. In this embodiment, the tuner unit 12 is composed of a main tuner 14 and a sub tuner 15. Each of the tuners 14 and 15 selects any one of a plurality of broadcasting stations, extracts a broadcasting wave of the broadcasting station from the broadcasting waves received by the antenna 11, and extracts the broadcasting wave. The waves are demodulated to reproduce the audio signal of the broadcast program, and the audio signal is given to the speaker 13 to output the audio.

The position measuring device 5 is provided to measure the current position of the receiver 1, and is equipped with a GPS receiving circuit 21 and a GPS.
It is realized by a GPS receiving device including a receiving antenna 22. The GPS receiving circuit 22 receives signals from a plurality of positioning satellites that orbit the earth by the GPS receiving antenna 21, uses the received signals to perform triangulation based on the position of the positioning satellites, and the position of the receiver 1 And its traveling direction and the current time. The current position is represented, for example, by latitude and longitude, which are GPS
It is output as data. The position measuring device 5 may measure the current position of the receiver 1 by a position measuring method other than the GPS receiving device.

The storage device 6 stores preset data, storage data and temporary storage data as reception condition data for the preset function of the receiver 1. The reception condition data is used when the central processing unit 7 causes the receiving device 4 to receive the broadcast wave using the preset function. Details of each data will be described later. The storage device 6 is realized by a non-volatile memory capable of writing / erasing data, such as a flash memory and an SRAM. Therefore, the power consumption of the receiver 1 when storing the reception condition data can be reduced as compared with the case where the RAM is used.

The central processing unit 7 includes a memory 24 and a clock unit 2.
Including 5 and. The clock unit 25 measures the current date and time, that is, the date and time. The memory 24 stores a control program for controlling each of the devices 3 to 6. The central processing unit 7 reads the control program from the memory 24 and executes it to automatically learn the reception control device that controls each of the devices 3 to 6 to receive and reproduce the broadcast wave, and the reception condition data. Operates as a learning control device. In general, the reception control device measures the position of the receiver 1 measured by the position measurement device 5 and the time measurement unit 25 when the broadcast station to be received and its transmission frequency are designated by the input / output device 3. Based on the date and time and the reception condition data stored in the storage device 6, the reception device 4 is controlled to receive the broadcast wave of the designated broadcasting station. The learning control device operates in parallel with the reception control device, sets storage and temporary storage data using the reception device 4, the position measurement device 5, and the time counting unit 25, and stores the storage and temporary storage data in the storage device 6.

The central processing unit 7 is realized by, for example, a microcomputer. The memory 24 is, for example,
It is realized by an internal ROM (read only memory) of the microcomputer. The central processing unit 7 also serves as a reception control unit and a learning control unit, and the control program is stored in the internal ROM, whereby the components for controlling the respective units 3 to 6 can be made into a single integrated circuit. . Therefore, the number of parts for controlling the devices 3 to 6 can be reduced.

The structure of the reception condition data will be described in detail below. The preset data is included in the receiver 1 in the reception condition data in advance, and is prepared for each broadcasting station. The preset data of each broadcasting station includes the transmission frequency, name and sequence of that broadcasting station, and data representing the service area of that broadcasting station. The service area is a transmission range in which a broadcast station transmits its broadcast wave. In the service area, basically, the broadcast wave from the broadcast station is received in a predetermined good reception state in which, for example, noise superposition is small. can do. A series of broadcasting stations is a set of a plurality of broadcasting stations that broadcast the same broadcasting program, and the same broadcasting program can be obtained by demodulating the broadcasting waves from the broadcasting stations having different transmission frequencies. Since this preset data is stored in the storage device 6 at the time of factory shipment, for example, it does not cover all broadcasting stations. Therefore, for example, a broadcasting station newly opened after setting preset data, and a local broadcasting station and a parent station transmitting station whose service areas such as a community broadcasting station and a child station transmitting station are narrower than a general radio broadcasting station. In many cases, the preset data of No. is not stored in the storage device 6.

The stored data is reception condition data used when the receiver 1 is at a predetermined position and the electromagnetic wave propagation state is a predetermined state, and the receiver 1 itself is used while the receiver 11 is used. Learn and remember. The stored data of each broadcasting station is the transmission frequency, name and series of that broadcasting station,
The reception position and the reception propagation condition are included. The reception position refers to a position where the broadcast wave of the broadcasting station can be received based on the stored data, and is represented by, for example, latitude and longitude. The reception propagation condition refers to the propagation condition at the time when the broadcast wave of the broadcasting station can be received based on the stored data. The propagation condition is a parameter for grasping the propagation state of the electromagnetic wave at that time, for example, the transmission path of the electromagnetic wave in the atmosphere. This propagation condition is changed for each frequency band to which the transmission frequency belongs. The temporary storage data is candidate data that should be the storage data, and is temporarily stored in the storage device 6 during learning of the storage data. The temporary storage data is obtained by adding to the storage data the number of consecutive times that the broadcast wave could be received when the tuner unit 12 was adjusted using the temporary storage data.

The reason for changing the reception propagation condition of the stored data according to the frequency band will be described below. For example, since the frequency bands of electromagnetic waves used as broadcast waves are different between AM broadcasts and FM broadcasts, the propagation conditions of broadcast waves in the atmosphere are different. For example, in the case of AM broadcasting, medium waves are transmitted as ground waves and space waves in the daytime, and at night the state of the ionosphere changes from daytime to reflect the medium waves. It is also transmitted as an ionospheric wave. therefore,
Since the propagation distance of medium waves changes greatly depending on the difference between day and night, only the broadcast waves of short-distance broadcasting stations can be received in the daytime, but at night, in addition to short-distance broadcasting stations. It is possible to receive broadcast waves from a long-distance broadcasting station. A short-distance broadcasting station is a broadcasting station that includes the receiving position in the service area, and a long-distance broadcasting station is a broadcasting station that does not include the receiving position in the service area.

In FM broadcasting, the service area of a single transmitting station is smaller than the service area of the transmitting station of AM broadcasting, and the change in the receiving state due to the terrain is large, so that the preset data is prepared. It is not always possible to stably receive the broadcast wave from the station transmitting station. In addition, the propagation distance of ultra-short waves is generally the same regardless of day or night, but when the sporadic E layer is generated and when there are flying objects and meteors, the ultra-short waves are reflected by them, so their propagation distance is Exceptionally grows. Therefore, FM broadcasting may be able to be received by a long-distance broadcasting station in the summer when the sporadic E layer is likely to occur.

As described above, the propagation state of electromagnetic waves in the atmosphere changes depending on the day or night or the season, and the occurrence rate of the exceptional propagation state for transmitting electromagnetic waves to a distance longer than the original propagation distance is midnight. It depends on the season, and in the very shortwave, it depends on the season. This difference in the propagation state is due to, for example, a difference in the transmission path of the electromagnetic wave in the atmosphere. When the frequency of the electromagnetic wave is different, the transmission path is different, and each transmission path changes whether or not to transmit the electromagnetic wave of the frequency. The factors differ for each transmission route. Therefore, when receiving the broadcast wave using the stored data, it is necessary to determine whether or not the broadcast wave of the broadcasting station can be received under the propagation conditions at that time according to the frequency of the broadcast wave. , Data for estimating the exceptional propagation state of each frequency band by changing the type of propagation condition for each frequency band.

In the case of medium wave, the difference between day and night is a major factor in determining whether or not the broadcast wave can be received. Therefore, the reception and propagation condition of the storage and temporary storage data of the broadcasting station of the AM broadcast is time data which is data for discriminating day and night in order to limit the time zone in which the data can be used. The time data represents, for example, an hour in which a broadcast wave can be received using the reception condition data. In the case of ultra-short waves, the difference in the sporadic E layer occurrence rate is a major factor in determining whether or not the sporadic E layer can be received. Therefore, the reception / propagation condition of the stored data of the broadcasting station with the transmission frequency of ultra-high frequency is the seasonal data for discriminating the season in order to identify the broadcasting station that can be suddenly received and exclude it later. Seasonal data represents, for example, the season in which broadcast waves can be received using the reception condition data on a monthly basis.

As a result, the stored data of the broadcasting station of the AM broadcasting is the transmission frequency, name and sequence of the broadcasting station, the receiving position,
And time data. The storage data of the broadcasting station of FM broadcasting is composed of the transmission frequency, name and sequence of the broadcasting station, reception position, and seasonal data. When searching for a station with the best reception of broadcast waves from broadcast stations of the same series, these items are included in the multiple factors for identifying the broadcast wave, and the change in the position of the receiver and the electromagnetic wave It corresponds to a factor that sequentially changes in response to changes in the propagation state. Therefore, it is possible to use the stored data in the above-mentioned case by reducing such data by extracting such items from the multiple factors for specifying the broadcast wave and setting the stored data. can do. Therefore, even if the memory capacity of the storage device 6 is limited, it is possible to store as much stored data as possible.

The operation of receiving the broadcast wave in the receiver 1 will be briefly described below. When the tuner unit 12 is adjusted using the preset data of the FM broadcasting station, the central processing unit 7 compares the transmission frequency in the preset data with the frequency of the broadcast wave currently received by the tuner unit 12, and further, The service area in the preset data is compared with the current position represented by the GPS data from the position measuring device 5. When the frequency of the received broadcast wave matches the transmission frequency and the current position is within the service area, it is determined that the broadcast wave can be stably received.

Further, the central processing unit 7 communicates with another broadcasting station whose service area is near the end of the service area of the broadcasting station where the current position of the receiver 1 is being received, or an area adjacent to the service area including the current position. When it reaches the vicinity of the boundary of, the broadcast wave from the other broadcasting station is also received. At that time, if the broadcasting station in the service area including the current position and the other broadcasting station are in the same series, the broadcasting wave with the higher received electric field strength is received from the broadcasting waves of both broadcasting stations. And demodulate. In this case, the name of the broadcasting station that has received the broadcast wave, the transmission frequency and sequence, the GPS data from the position measuring device 5, and the date and time at the time of reception are stored in the storage device 6 as one temporary storage data. Temporary storage and storage data are set in the summer due to accidental reception of a long-distance broadcasting station due to the Sporadic E layer and accidental reception of a long-distance broadcasting station due to flying objects, meteors, etc. At a later date, a process of removing them from the storage device 6 is performed.

When the tuner section 12 is adjusted using preset data of a broadcasting station for AM broadcasting, the central processing unit 7
Determines whether or not the broadcast wave can be stably received by the same processing as in the case of FM broadcasting. Further, when the broadcast wave is received during the daytime, the central processing unit 7 determines whether the current position of the receiver 1 is near the end of the service area of the broadcasting station being received or the current position, as in the case of FM broadcasting. When it reaches the vicinity of the boundary with another broadcasting station whose service area is an area adjacent to the including service area, the broadcasting wave from the other broadcasting station is also received, and the broadcasting wave with the higher received electric field strength is received. . And GP from GPS receiver
S data, the name and sequence of the broadcasting station, frequency, and time data indicating that the reception time zone is daytime,
The temporary storage data and the storage device 6 are stored. Further, when receiving the broadcast wave at night, not only the broadcasting station including the current position in the service area, but also the broadcasting station having the area adjacent to the service area as the service area, and the broadcasting station farther than the broadcasting station. The broadcasting station also receives as a reception target, among the broadcasting waves of those broadcasting stations, the one having a high received electric field strength and receives it for demodulation. Then, the GPS data from the GPS receiver, the name and sequence of the broadcasting station, the frequency, and the time data indicating that the reception time zone is night are stored in the storage device 6 as one temporary storage data.

However, the receiving operation at and around the boundary of the service area described above is performed when there is no broadcasting station of the same series as the broadcasting station being received at that time, or when a broadcasting station of the same series is being received at that time. When a broadcast program different from the broadcast program broadcast by the broadcast station is being broadcast, it is not executed and the broadcast wave of the broadcast station in the service area including the current position is received.

2 and 3 are flow charts for explaining the receiving operation using the preset function performed according to the control program of the central processing unit 7. The reception operation using the preset function of the receiver 1 will be described using these.

For example, when the operator operates the operation unit 17 of the input / output device 3 to input the name of the broadcasting station and the transmission frequency, the process proceeds from step a1 to step a2.
During step a2 to step a10, the central processing unit 7
Operates as a reception control device. In step a2,
Based on the operation result of the input / output device 3, the central processing unit 7
The input of the key operated by the operator is determined. This input determination is preferably performed a plurality of times, for example, to prevent chattering. Based on the input result of the key whose input is confirmed by the input determination of this key, the central processing unit 7 determines the broadcasting station to receive. Next, in step a3, the central processing unit 7 reads the GPS data representing the current position of the receiver 1 from the position confirmation device 5.

Next, the central processing unit 7 carries out step a4.
At a9, the reception condition data of the broadcasting station to be received confirmed at step a2 is acquired. Specifically, first,
In step a4, it is determined whether or not the preset data of the broadcasting station to be received is stored in the storage device 6 by referring to all the preset data in the storage device 6. When the preset data is stored, the process proceeds from step a4 to step a5, and the preset data is read from the storage device 6. If the preset data is not stored, the process proceeds from step a4 to step a6.

At step a6, the central processing unit 7 determines whether, among all the stored data in the storage device 6, the stored data of the broadcasting station to be received is present. In this case, the storage data of the broadcasting station to be received is such that the reception position matches the position represented by the GPS data read in step a3, and the reception propagation condition is equal to the current propagation condition. If it is determined that the storage data of the broadcasting station to be received is stored, the process proceeds from step a6 to step a7, and the storage data is read from the storage device 6. If the stored data is not stored, the process proceeds from step a6 to step a8.

In step a8, it is determined whether or not the temporary storage data of the broadcasting station to be received confirmed in step a2 is included in all the temporary storage data in the storage device 6. The details of this determination are the same as the details of the determination in step a6, except that the processing target is all temporary storage data. When it is determined that the temporary storage data of the broadcasting station to be received is stored, the process proceeds from step a8 to step a9, and the temporary storage data is read from the storage device 6. If the temporary storage data is not stored, steps a8 to a
Proceed to 11. By the processing of steps a4 to a9, if the reception condition data of the broadcasting station confirmed in step a2, that is, any of the preset data, storage data, and temporary storage data of the broadcasting station is stored in the storage device 6. , The data is read.

Then, in step a10, the central processing unit 7
Is a tuner unit of the receiving device 4 so that the receiver 1 receives, selects and demodulates the broadcast wave of the broadcast station to be received by the receiver 1 based on the transmission frequency of the reception condition data read in the processing of steps a4 to a9. Adjust 12. As a result, the tuner unit 12 selects a broadcast station to be received, and starts reception of a broadcast wave of the broadcast station and reproduction of a broadcast program from the broadcast wave.

When it is determined in step a8 that there is no temporary storage data, the preset data of the broadcast station to be received and the storage and temporary storage data of the broadcast station at the current position and the current propagation state are stored in the storage device 6. Not not. Therefore, the central processing unit 7 performs steps a11 to a2.
In step 5, it operates as a learning control device in order to make a broadcasting station receivable under the current position of the receiver 1 and the current propagation condition receivable by using the preset function.

When operating as a learning control device, the central processing unit 7 first scans the frequency using the tuner unit 12 in step a11 to search for a broadcasting station capable of receiving a broadcast wave. Specifically, the receiving unit 3 receives the broadcast wave while changing the frequency of the broadcast wave to be received by the tuner unit 12. For example, when the received electric field strength of the received broadcast wave is equal to or higher than a predetermined reference received electric field strength, the central processing unit 7 determines that the broadcast wave can be received, and can receive the broadcast station transmitting the broadcast wave. It is regarded as an excellent broadcasting station. Further, the central processing unit 7 causes the storage device 6 to temporarily store the transmission frequency of the received broadcast wave.

The broadcast wave that the tuner section 12 should receive is
For example, it is a broadcast wave of all the same-series broadcasting stations that include the current position of the receiver 1 within the service area and have the same series as the broadcasting station to be received. In addition, when the current position of the receiver 1 is at the boundary of the service area of the same-series broadcasting station and in the vicinity thereof, or the boundary of the service area of another broadcasting station whose service area is adjacent to the same-series broadcasting station and whose adjacent series are the same. And in the vicinity thereof, the broadcast wave of the other broadcast station may be included in the broadcast waves to be scanned. In this case, if the broadcast waves of the same-series broadcasting station and the other broadcasting station can be received together, the reception electric field strengths of both broadcasting waves are compared, and the broadcasting wave with the stronger reception electric field strength is compared. Considered as a broadcast wave that could be received.

Next, in step a12, the central processing unit 7 determines whether or not a broadcasting station receivable by the receiver 1 has been found by the processing in step a10. If there is no receivable broadcasting station, it is not possible to receive broadcasting waves from all broadcasting stations at the current position of the receiver 1.
At step a27, the processing operation of the flowchart ends. If there is a receivable broadcasting station, the process proceeds from step a12 to step a13, and at steps a13 to a16,
Set the temporary storage data of the broadcasting station.

First, in step a13, the central processing unit 7
Determines whether the transmission frequency stored in step a11 belongs to the medium wave band or the ultra high frequency band. Step a11
If the broadcast wave received at is a medium wave, the process proceeds from step a13 to step a14, and if it is an ultra-short wave, the process proceeds from step a13 to step a15. In step a14, the central processing unit 7 determines from the position measuring device 5 in step a14.
The GPS data measured at the time point when the broadcast wave is received is read at 11, and the time data indicating the time at that time is read from the time counting unit 25. At step a15, the central processing unit 7
Reads the GPS data measured when the broadcast wave was received from the position measuring device 5 in step a11, and
From 5 read the seasonal data representing the season at that time. After each data is obtained in steps a14 and a15, step a1
Go to 6.

At step a16, the central processing unit 7
In step a10, the temporarily stored data of the receivable broadcasting station is set and stored in the storage device 6. Specifically, the GPS data obtained in steps a14 and a15 is set as the reception position of the temporary storage data, and the frequency stored in step a11 is set as the transmission frequency. Also, step a1
If the frequency stored in the storage device 6 in 1 belongs to the medium wave band, the reception propagation condition of the temporary storage data is the time data obtained in step a14, and if the frequency belongs to the ultra high frequency band, the reception propagation condition is set to The seasonal data is obtained in step a15. With this, the type of the reception propagation condition can be changed according to which frequency band the transmission frequency of the broadcast wave of the temporary storage data belongs. Further, the name and sequence of the broadcasting station having the frequency as the transmission frequency are searched from the plurality of preset data stored in the storage device 6, and the name and sequence of the broadcasting station in the searched preset data are temporarily set. The name and sequence of the broadcasting station of the stored data. Further, when the names and series of newly established broadcasting stations and local broadcasting stations are stored in the storage device 6 in advance, and these are also subject to the search in addition to the preset data, broadcasting without preset data The temporary storage data of the station can be set.

After setting the temporary storage data, the process returns from step a16 to step a3, and the processes of steps a2 to a9 are performed again. If at least one of the current position of the receiver 1 and the current propagation condition has changed at this point, the broadcasting station to be received or the same sequence as the current position and propagation condition after the change are used as the reception position and the reception propagation condition. If there is the reception condition data of, the data is quoted, and if not, the processes of steps a11 to a16 are performed again. Also,
If there is no change in the current position and the propagation conditions, step a
Since the temporary storage data having the current position and the propagation condition at this point in time as the reception position and the reception propagation condition is set in 16, the temporary storage data is quoted. When any of the reception condition data is quoted, steps a5, a7, a9
From step a10, the central processing unit 7 adjusts the tuner unit 12 using the cited reception condition data.

Then, in steps a17 to a25, the central processing unit 7 operates again as a learning control device. In outline, the central processing unit 7 first determines in step a17 whether or not the broadcast wave from the broadcasting station selected by the receiving device 4 in step a6 can be stably received.
Specifically, the tuner unit 12 determines whether or not the received electric field strength of the broadcast wave currently being received is equal to or higher than a predetermined reference received electric field strength. If so, it is determined that the broadcast wave from the selected broadcast station can be received, and the process proceeds from step a17 to step a18. If not,
When it is determined that the broadcast wave cannot be received, step a
It progresses from 17 to step a21.

At step a18, the central processing unit 7
It is determined whether the calendar of the chronological table is comparison data. That is, it is determined whether the current date and time measured by the clock unit 25 is the date and time at which the save processing routine should be executed.
The save processing routine is used to determine whether the propagation state of electromagnetic waves is a seasonal factor based on the data of yearly day and night changes based on the yearly calendar, and is executed on a monthly basis, for example. If so, step a
From step 18, the process proceeds to step a19, and if not, the process directly returns from step a18 to step a17. As a result, when channel selection is performed using the cited reception condition data, reception is performed from the time when the tuner unit 12 is adjusted in step a10 until the time when the calendar of the chronological table becomes comparison data. If the broadcast wave from the proper broadcasting station is continuously received, the determinations in steps a17 and a18 are repeated.

Steps a19 and a20 are the first saving processing routine for determining whether the temporary saved data is changed to the saved data or is saved as it is. Central processing unit 7
First, in step a19, the temporary storage data is used to adjust the tuner unit 12 in step a10, and the tuner unit 12 is adjusted using the temporary storage data to receive the broadcast wave. It is determined whether or not it has been repeated multiple times. This determination is affirmative, for example, when the number of consecutive times in the temporary storage data is equal to or greater than a predetermined number of times set in advance, and is denied when it is less than the predetermined number of times. In this embodiment, the specified number of times is three. When the determination is negative, the process directly returns from step a19 to step a17. If the determination is positive, steps a19 to a20
Proceed to.

At step a20, the temporary storage data used for the adjustment of the tuner section 12 at step a10 is changed to the storage data and stored in the storage device 6, and all the temporary storage data relating to the newly stored storage data are stored. Storage device 6
Remove from. As a result, the capacity of the data stored in the storage device 6 can be reduced and the storage device 6 can be effectively used. After storing the stored data, the process returns from step a20 to step a17, and the determinations of steps a18 and a19 are repeated.

At step a21, the central processing unit 7
By the same processing as step a18, it is determined whether the calendar of the chronological table is comparison data. If not, the process proceeds from step a21 to step a26, and if so, the process proceeds from step a21 to step a22.
In steps a22 to a25, the central processing unit 7 is a second storage processing routine that stores and deletes the storage data and the temporary storage data in order to set annual calendar data.

The central processing unit 7 first carries out step a22.
Then, it is determined whether or not the stored data is used for the adjustment of the tuner section 12 in step a10. If so, the process proceeds from step a22 to step a23, the storage data is stored in the storage device 6 as temporary storage data, and the storage data is erased. Otherwise, step a22
From step a24, it is determined whether the temporary storage data is used for the adjustment of the tuner unit 12 in step a10. If so, step a24 to step a2
5, the temporary storage data is erased from the storage device 6. Otherwise, the tuner unit 12 in step a10
Since the preset data was used for the adjustment of, the process proceeds from step a24 to step a26 without changing or erasing the data. After the data change and deletion are completed, the process proceeds from step a23, a25 to step a26.

At step a26, the central processing unit 7
It operates again as a reception control device, and determines whether or not to confirm the presence / absence of reception condition data of a broadcasting station other than the broadcasting station to be received determined in step a2. For example, when there are a plurality of reception condition data, there may be reception condition data that can be used when the current position of the receiver 1 changes or the current propagation state changes. Therefore, the reception condition data is checked again. Since it is necessary, step a2
Affirm the judgment of 6. If there is no reception condition data other than the reception condition data of the broadcasting station determined in step a2, there is no usable reception condition data.
The decision of 26 is denied. If the determination is positive, the process returns from step a26 to step a3, and if the determination is negative, the process returns from step a26 to step a11. This is the end of the description of the flowchart.

Step a1 of the flowchart of FIGS.
The reasons for performing the processes 1 to a16 and a19 to a25 and the effects thereof are as follows.

When the receiver 1 can receive the broadcast wave of any one of the plurality of broadcast stations under the new reception position and the new propagation condition, the broadcast wave is received at the reception position and the reception position. It is difficult to judge whether or not the signal can always be stably received under the propagation condition by only one reception. For example, when the broadcast wave is an ultra-short wave, the broadcast wave of a long-distance broadcasting station may be accidentally received due to accidental reflection due to a sporadic E layer, a flying object, a meteor, or the like. Since it is difficult to always perform stable reception by such accidental reflection, it is not appropriate to store the reception condition data of the broadcasting station including this reception position. Since the above-mentioned accidental reflection factors rarely occur every day, this accidental reception is unlikely to occur every day. Therefore, for example, when the broadcast wave of the broadcast station is received at the reception position for three consecutive days,
It is almost never possible to receive this broadcast wave for 3 days. On the other hand, if the broadcast wave is from a newly established broadcast station and a local broadcast station, it can always be received if the reception position is within the service area of those broadcast stations. Therefore, when the broadcast wave of the broadcasting station is received at the reception position for three consecutive days, the broadcast wave can be always received for three days.

Therefore, when the broadcast wave of any of the broadcasting stations can be received under the new reception position and the new propagation condition by the processing of steps a11 and a12, the broadcasting station of that broadcasting station is processed in steps a13 to a16. The reception condition data is temporarily stored as temporary storage data. After that, when the temporarily stored data is further used for adjustment of the tuner unit 12, the number of times the broadcast wave can be received, that is, the broadcast wave of any one of the broadcast stations is determined based on the new reception position and new propagation conditions. The number of consecutive receptions that can be continuously received is stored. In this state, if the above-mentioned storage processing routines are executed, the temporary storage data is stored or erased according to the following conditions.

First, the temporary storage data that can be received during the execution of the first storage processing routine and that has been able to receive the broadcast wave a plurality of times consecutively are changed to storage data by the processing of steps a19 and a20. . For example, the temporary storage data of the new broadcasting station and the local broadcasting station satisfy the above condition because the broadcast wave can be always received when it is used for the adjustment of the tuner unit 12, and therefore, the storage data is stored in the storage device 6 as the storage data. Remembered. In addition, the temporary storage data that can be received when the first storage processing routine is executed and the number of times the broadcast wave can be continuously received is less than the specified number of times remains the temporary storage data. Temporary storage data that cannot be received when the routine is executed is erased by the processing in step a25. For example, the temporary storage data stored by accidental reception does not always receive the broadcast wave when it is used for the adjustment of the tuner unit 12, and thus satisfies the above condition, and therefore the temporary storage data is stored. It is left alone or erased. As a result, it is possible to prevent temporary storage data stored by accidental reception from being stored in the storage device 6, and always store only storage data of a broadcasting station that can receive broadcast waves in the storage device 6. . Therefore, the reliability of the storage and temporary storage data can be improved.

Furthermore, the storage data that cannot be received when the second storage processing routine is executed is changed to temporary storage data.
For example, if temporary storage data set by accidental reception in summer is erroneously stored as storage data, it is often unreceivable during the seasons other than summer, so it is restored to temporary storage data during that season. be able to. After that, if the broadcast wave cannot be received even if the tuner section 12 is adjusted using the temporary storage data, the temporary storage data is stored in step a2.
It is erased by the process of 5. As a result, the stored data stored by accidental reception in summer can be deleted in seasons other than summer. That is, by executing the second storage processing routine, the central processing unit 7 operates as an erasing device that later erases the stored data set and stored based on the accidental reception from the storage device 6. Therefore, it is possible to store in the storage device 6 only the stored data of the broadcasting station that can be always received throughout the year.

Further, for example, the temporary storage data of a broadcasting station of AM broadcasting includes a time zone in which the temporary storage data can be used as a reception propagation condition. Therefore, when the operator designates the AM broadcast station as the broadcast station to be received, the temporary storage data in the time zone including the specified time is selected, so that even the same broadcast station can be selected according to the specified time. Different temporary storage data is used. Therefore, even with the temporary storage data of a long-distance broadcasting station, if the broadcasting wave of the broadcasting station can be continuously received multiple times at night, for example,
The temporary storage data is stored as storage data. As a result, the temporary storage data of a long-distance broadcasting station can always be received when it is possible to receive a broadcast wave using the temporary storage data in a receivable time period for a plurality of consecutive times. Is changed to the stored data. That is, it is possible to determine whether or not the temporarily stored data of the broadcasting station of AM broadcasting can be continuously received for each available time period.

The above-described receiver 1 stores the storage data and the temporary storage data in addition to the preset data as the reception condition data. Therefore, the receiver 1 can automatically learn the reception condition data of the broadcasting station that does not have the preset data. For example, it is possible to automatically set the reception condition data of a broadcasting station for which preset data is not prepared at the time of shipment of the receiver 1, such as road information radio and community broadcasting whose service points are expected to be expanded in the future. As a result, the receiver 1 can receive a broadcast station having a smaller service area than a general broadcast station by using the preset function. In this way, the receiver 1 can have more detailed reception condition data than the receiver having the conventional preset function.

Further, the receiver 1 can execute another receiving operation utilizing the receiving operation using the preset function. First to third examples of other receiving operations will be described below.

In the first example, in the central processing unit 7, the current position of the receiver 1 is the service area of the broadcasting station currently receiving, based on the latitude and longitude represented by the GPS data read from the position measuring device 5. It is determined whether or not the series of the broadcasting station being received is read and analyzed by receiving the reception condition data of the broadcasting station. As a result, when the current position is near the boundary of the service area, the reception electric field strength of the broadcast wave of another broadcasting station adjacent to the service area of the broadcasting station that is receiving the same among the broadcasting stations of the same sequence If the received electric field strength of the broadcast wave of another broadcast station is higher than the received electric field strength of the broadcast wave currently being received by comparing the received electric field strength of the broadcast wave being received, the broadcast wave of the other broadcast station is received. Can be received by the receiver 1. Further, if this operation is performed when the receiver 1 sequentially moves through the service areas of a plurality of broadcasting stations of the same series, the broadcast wave of the broadcasting station of that series can always be received. It is possible to continuously listen to the same broadcast program.

In the second example, the storage and temporary storage data of the broadcasting station of AM broadcasting includes the usable time zone as the reception propagation condition, so that the broadcasting station of a long distance is based on this storage and temporary storage data. It is possible to grasp the time zone in which the broadcast wave from can be received. As a result, at night, it is possible to increase the number of broadcasting stations that can be received using the reception condition data at the position of the receiver at that time, compared to the daytime. Therefore, when the receiver 1 is moving at night, the central processing unit 7 uses the reception condition data that can be received in that time zone to identify the broadcast station to be received among the receivable long-distance broadcast stations. It is possible to select and receive a broadcast wave of a broadcast station having a good reception condition from broadcast stations of the same series. Therefore, it is possible to always select a broadcasting station that receives a broadcast wave more easily.

The tuner section 12 is provided with a plurality of tuners so that the receiver 1 can be used when a plurality of broadcasting stations of the same series are sequentially selected and received as in the above-described first and second examples. This is to maintain a good reception state without interrupting the reproduction of broadcast programs simultaneously broadcast by those broadcasting stations. For this reason, the main tuner 14 and the sub-tuner 15 respectively select and demodulate the broadcast waves of different broadcast stations from a plurality of broadcast stations that can be received by the receiver 1 at the current position and have the same sequence. It is preferable that the audio signal output from one of the tuners having the better reception state is always selected and output from the speaker 13.

In the third example, the priority order of use is set in the reception condition data quoted for use in adjusting the tuner unit 12, and the priority order of the storage and temporary storage data of the broadcasting station of the community service is set to another. Keep it higher than the broadcaster's priority. Thereby, the broadcast wave of the broadcasting station of the community service can be received with the highest priority.
Also, even if you are receiving a broadcast wave from a broadcast station other than the community service while you are running, when you enter the service area of the broadcast station of the community service, you will automatically receive the broadcast wave of the broadcast station of that service and After passing through the area, it is possible to reselect the broadcasting station that was receiving before entering the service area.

As described above, in the receiver 1, the receiver 1 itself can automatically perform the channel selection suitable for the information required by the user of the receiver. Also, the receiver 1
When the vehicle is installed in a vehicle, the receiver 1 itself automatically selects a channel, so that the driver does not need to select a channel while the vehicle is running, and the driver can easily perform an operation for channel selection. Become. Furthermore, since the number of reception condition data is larger than that of the conventional receiver, the reception operation required by the operator can be performed easily and easily by using this. Further, the other receiving operation described above can be automatically made compatible with the newly opened broadcasting station and road information radio station.

Further, when the receiver 1 designates the broadcasting station to be received, it is preferable to perform the method described below. The central processing unit 7 acquires the current position of the receiver from the position measuring unit 5, reads a map of the area including the position from the storage unit 6, and causes the display unit 18 to display the map graphically, that is, as a graphic. . Furthermore, in association with the displayed map, the names and transmission frequencies of the stations that can be received when there are receivers in the area of the displayed map are listed in, for example, a list format, and are displayed in the displayed map. Display in association with each other. As a result, the operator can surely and easily know the broadcasting station that the receiver 1 can receive at the current position by using the preset function. The operator selects a broadcasting station to be received from the displayed broadcasting station list and operates the operation unit 17 to input the selected broadcasting station to the receiver 1. This allows the operator to easily select a desired broadcasting station from the broadcasting stations that can be received at the current position of the receiver 1 and designate it as the receiver. Moreover, even if the liquid crystal display has a touch panel, presetting on the way of moving in advance can be performed on the map.

As described above, the receiver 1 is installed in a moving body such as a car or a ship, whether the moving body is moving or stopped, and the broadcast program desired by the operator. Can be reproduced from the broadcast wave from the broadcast station having the best reception state at the current position and propagation state. The structure and behavior of this receiver are AM broadcast and F
The present invention can be applied not only to M broadcasting but also to receivers using electromagnetic waves in other frequency bands. In addition to radio broadcasting,
The present invention can be applied to a receiver that receives other broadcasts such as television broadcasts, and is not limited to broadcasts, and any receiver that receives electromagnetic waves may be used.

[0085]

As described above, according to the present invention, the reception control means of the receiver uses the plurality of reception conditions stored in advance in the reception condition storage means, and the current position of the receiver and the current propagation state of the electromagnetic wave. The receiving means is controlled based on As a result, the receiver can always receive the electromagnetic wave stably and automatically even when the propagation state of the electromagnetic wave changes and the receiver moves.

Further, the learning control means automatically sets the reception condition according to the position of the receiver and the propagation state of the electromagnetic wave. Therefore, depending on how the operator uses the receiver,
Since the reception condition can be set, the number of broadcasting stations to which the reception condition is set is increased as compared with the conventional preset data. Therefore, the reception control means can select a broadcasting station more finely than when only the preset data is used. Further, the receiver deletes the reception condition of the electromagnetic wave which becomes difficult to be received due to the transition of the season among the reception conditions stored in the storage unit by the learning control unit. This makes it possible to further improve the reliability of the reception condition stored in the reception condition storage means.

Further, according to the present invention, when the reception condition is set, the learning control means can re-receive the electromagnetic wave having the same frequency a plurality of times at the position and the propagation state at the time when the electromagnetic wave is received once. Or not.
Thereby, it is possible to determine whether the electromagnetic wave is accidentally received. Therefore, it is possible to prevent the reception condition from being set to the broadcasting station that has accidentally received the electromagnetic wave, and to newly set the broadcasting station, the local broadcasting station where the existing reception condition is not set, and the slave station. The receiving conditions for the transmitting station can be set automatically. As a result, the reliability of the reception condition can be improved.

[0088]

Further, according to the present invention, the propagation condition is changed to a condition for estimating the presence or absence of exceptional propagation of the electromagnetic wave according to the frequency of the electromagnetic wave. Accordingly, when the receiver receives the electromagnetic waves in a plurality of frequency bands together, the reliability of the reception conditions of the electromagnetic waves in both frequency bands can be improved together.

Further, according to the present invention, when the electromagnetic wave is an ultra-short wave, the difference in season is detected as the propagation condition. Based on this propagation condition, the reception condition set when an exceptional propagation due to the sporadic E layer occurs can be removed later, so that the reliability of the reception condition of the ultra-high frequency can be improved. .

Furthermore, according to the present invention, when the electromagnetic wave is a medium wave, the difference between day and night is detected as the propagation condition. As a result, it is possible to increase the number of broadcasting stations that can be received at night in a single position, as compared to during the daytime. As a result, the reception condition can be set finely according to the usage mode of the operator.

Further, according to the present invention, the receiver measures the position by the GPS receiver. As a result, the accuracy regarding the position of the reception condition can be improved. Furthermore, according to the present invention, the receiver stores the reception condition in the non-volatile memory. This can reduce the power consumption of the receiver.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical configuration of a receiver 1 according to an embodiment of the present invention.

FIG. 2 is a flow chart for explaining a control program of a central processing unit 7.

FIG. 3 is a flowchart for explaining a control program of a central processing unit 7.

[Explanation of symbols] 1 receiver 3 I / O device 4 Receiver 5 Position measuring device 6 storage device 7 Central processing unit

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G01S 5/00-5/14 H04B 1/16 H03J 7/18

Claims (8)

(57) [Claims] 1. A receiving means for receiving an electromagnetic wave, a position measuring means for measuring a position of the receiving means, a propagation condition detecting means for detecting a propagation condition for grasping a propagation state of the electromagnetic wave, and a plurality of broadcasting stations. A reception condition storage unit that stores, as a reception condition, a frequency of an electromagnetic wave to be transmitted, a position of a reception unit that can receive the electromagnetic wave, and a propagation condition for receiving the electromagnetic wave at the position, respectively, being stored as a reception condition. Among the reception conditions stored in the reception condition storage means, a reception condition whose position is equal to the position measured by the position measurement means and whose propagation condition is equal to the propagation condition detected by the propagation condition detection means is selected, Reception control means for causing the reception means to receive an electromagnetic wave having a frequency of the selected reception condition; and a predetermined frequency range in which the frequencies of the electromagnetic waves transmitted from the plurality of broadcasting stations are present. An electromagnetic wave having a frequency within several bands is received by the receiving means, and the frequency of the received electromagnetic wave, the position measured by the position measuring means at the time of receiving the electromagnetic wave, and the propagation condition detected by the propagation condition detecting means at the time , Learning control means for storing in the reception condition storage means as the receiving means, and propagating the electromagnetic wave to the outside of a predetermined transmission area in which the broadcasting station should transmit the electromagnetic wave among the receiving conditions stored in the storage means And a erasing means for selecting and erasing a reception condition including a propagation condition for grasping a predetermined propagation state whose occurrence rate increases and decreases over time. 2. A receiving means for receiving an electromagnetic wave, a position measuring means for measuring a position of the receiving means, a propagation condition detecting means for detecting a propagation condition for grasping a propagation state of the electromagnetic wave, and a plurality of broadcasting stations. A reception condition storage unit that stores, as a reception condition, a frequency of an electromagnetic wave to be transmitted, a position of a reception unit that can receive the electromagnetic wave, and a propagation condition for receiving the electromagnetic wave at the position, respectively, being stored as a reception condition. Among the reception conditions stored in the reception condition storage means, a reception condition whose position is equal to the position measured by the position measurement means and whose propagation condition is equal to the propagation condition detected by the propagation condition detection means is selected, Reception control means for causing the reception means to receive an electromagnetic wave having a frequency of the selected reception condition; and a predetermined frequency range in which the frequencies of the electromagnetic waves transmitted from the plurality of broadcasting stations are present. An electromagnetic wave having a frequency within several bands is received by the receiving means, the position measured by the position measuring means at the time of receiving the electromagnetic wave, and the same position and the same propagation condition as the propagation condition detected by the propagation condition detecting means at the time. In the above, it is determined whether or not the receiving means can re-receive the electromagnetic wave of the frequency a plurality of times continuously, and when the plurality of times of continuous reception are received, the frequency, the position, and the propagation condition are the reception conditions. And a learning control unit that does not store the frequency, the position, and the propagation condition in the reception condition storage unit when the reception condition storage unit does not receive a plurality of times in succession. And receiver. 3. The reception condition stored in the storage means causes the broadcast station to propagate the electromagnetic wave to the outside of a predetermined transmission area where the electromagnetic wave should be transmitted, and the occurrence rate thereof increases or decreases with the lapse of time. 3. The receiver according to claim 2, further comprising erasing means for selecting and erasing a reception condition including a propagation condition for grasping a predetermined propagation state. 4. The propagation condition detecting means, based on the frequency of the electromagnetic wave received by the receiving means, changes with time in the propagation state of a propagation path for propagating the condition to be detected as the propagation condition. The receiver according to claim 1 or 2, wherein the condition for estimating is changed. 5. The receiver according to claim 1, wherein the electromagnetic wave is an ultrashort wave, and the propagation condition represents whether or not the season at the time of receiving the electromagnetic wave is summer. 6. The receiver according to claim 1, wherein the electromagnetic wave is a medium wave, and the propagation condition represents whether the time when the electromagnetic wave is received is daytime or night. 7. The receiver according to claim 1, wherein the position measuring means is a global positioning system receiver. 8. The receiver according to claim 1, wherein the reception condition storage means is a nonvolatile memory capable of writing and erasing data.