KR200372485Y1 - Radio frequency auto-roaming device - Google Patents

Abstract

According to the present invention, the radio frequency of each radio station in each region is stored in a memory, and then the electric field sensitivity of the radio station frequency being listened to in the specific region is lower than a predetermined value in the moving region while the vehicle moves from one region to another. At the falling point, the electric field sensitivity is automatically detected above a predetermined reference value among the used frequencies of the radio stations stored in the memory, and the radio station is searched for the same radio station as the radio station that was listening in the specific area to listen to the corresponding radio station. The present invention relates to radio frequency auto-roaming devices.

According to the present invention, if the vehicle moves from one area to another while the driver is listening to the radio broadcast while the driver is driving, even if the driver does not know the broadcast frequency to receive the radio broadcast before the movement in the mobile area It is possible to conveniently listen to the same radio broadcast as the radio broadcast before the move.

Description

RADIO FREQUENCY AUTO-ROAMING DEVICE}

The present invention relates to a car audio system, and more particularly to a radio frequency auto-roaming device.

Conventionally, while driving a vehicle in a specific area, while listening to a radio broadcast of a specific frequency through a car audio system, when the vehicle moves to another area where the electric field sensitivity is low enough that it is difficult to listen to the radio broadcast currently being listened to, the driver In order to normally listen to the same radio station, a frequency control button or a dial switch is operated to search for a corresponding radio station in a moving area.

However, if the driver does not know the corresponding radio broadcast frequency in the moving area, not only is it inconvenient to spend a lot of time searching for the frequency, but the operation of searching for the radio broadcast frequency while consuming such a long time may cause the driver to Neglecting forward attention can interfere with safe driving.

The present invention is to solve the above-mentioned conventional problems, an object of the present invention is to store the frequency of use of radio stations in each region in the memory, and then listen in the specific region while the vehicle moves from one region to another region When the field sensitivity of the radio station frequency in use falls below a predetermined reference value in a moving area, the field sensitivity is automatically detected above a predetermined reference value among the frequencies used by the radio station stored in the memory, and the radio was being listened to in the specific area. The present invention provides a radio frequency automatic roaming apparatus that searches for a frequency of use of a radio station identical to a broadcast station and listens to a corresponding radio broadcast.

1 is a block diagram of an automatic radio frequency roaming apparatus according to the present invention.

Figure 2 is a flow chart showing the operation of the radio frequency automatic roaming device according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10: memory

20: status input unit

30: Micom

40: alarm sound generating unit

50: frequency automatic conversion unit

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

Referring to FIG. 1, the memory 10 stores frequencies used by radio stations in each region.

The state input unit 20 stores a radio station frequency selected by a driver in a specific region after the driver turns on a radio power switch of a car audio system.

The microcomputer 30 periodically checks the electric field sensitivity of the radio frequency station frequency stored in the state input unit 20 to determine whether it is equal to or less than a predetermined reference value (1 to 20 dB), and discriminates the determined current electric field sensitivity to be less than or equal to the reference value. If the electric field sensitivity is detected above a predetermined reference value (3 to 70 dB) after searching for a use frequency of the same radio station as the radio station that was listening in the specific region among the use frequencies of the radio station stored in the memory 10 After the determination, the frequency automatic switching signal including the used frequency of the newly discovered radio station and the automatic switching alarm signal informing the driver of the roaming state are output.

The alarm sound generator 40 generates an alarm sound according to the automatic switching alarm signal of the microcomputer 30 to inform the driver of the roaming state.

The frequency automatic switching unit 50 automatically converts the radio frequency of the car audio system to the use frequency of the found radio station according to the frequency automatic switching signal of the microcomputer 30.

Radio frequency automatic roaming device according to the present invention configured as described above operates as follows.

As shown in FIG. 2, when the driver turns on the radio power switch of the car audio system, the state input unit 20 stores the radio station frequency selected by the driver in a specific region while driving the vehicle (S10).

Subsequently, the microcomputer 30 periodically checks the electric field sensitivity of the radio frequency station frequency stored in the state input unit 20 (S12) to determine whether or not it is equal to or less than a predetermined reference value (for example, 5 dB) (S14).

If the microcomputer 30 periodically checks the electric field sensitivity of the radio frequency station stored in the state input unit 20 (S12) to determine whether or not the predetermined reference value (for example, 5 dB) or less is determined, When the electric field sensitivity is determined to be equal to or less than a reference value (for example, 5 dB), the microcomputer 30 selects the frequency of use of the same radio station as the radio station that was listening in the specific region among the frequencies of use of the radio station stored in the memory 10. After the search (S16), it is determined whether the electric field sensitivity is detected above a predetermined reference value (for example, 15 dB) for the found use frequency (S18).

At this time, when the electric field sensitivity of the newly searched radio station is detected to be higher than a predetermined reference value (eg, 15 dB), the microcomputer 30 first outputs an automatic switching alarm signal to the alarm sound generator 40. Accordingly, the alarm sound generating unit 40 generates an alarm sound to inform the driver of the roaming state (S20).

Subsequently, when the electric field sensitivity of the newly searched radio station is detected to be greater than or equal to a predetermined reference value (eg, 15 dB), the microcomputer 30 detects the frequency automatic switching signal including the frequency of use of the newly discovered radio station. Output to the frequency automatic conversion unit 50, accordingly the frequency automatic conversion unit 50 automatically converts the radio frequency of the car audio system to the use frequency of the found radio station (S22), the driver moves in a specific area This makes it easy to listen to the same radio station you've heard before, even after moving to another area.

As described above, the automatic radio frequency roaming apparatus according to the present invention uses the same frequency as the radio station before the movement when the vehicle moves from one area to another while the driver is listening to the radio broadcast. Since the search is automatic, the driver can always listen to the same radio broadcast as the radio broadcast before the move even if the driver does not know the broadcast frequency to receive the radio broadcast before the move.

What has been described above is just one embodiment for implementing the automatic radio frequency roaming apparatus according to the present invention, the present invention is not limited to the above-described embodiment, the present invention claimed in the utility model registration claims below Without departing from the gist, anyone of ordinary skill in the field of the present invention will have a technical spirit of the present invention to the extent that various changes can be carried out.

Claims (1)

A memory 10 for storing the frequency of use of radio stations in each region; A state input unit 20 for storing a frequency of a radio station selected in a specific region after the driver turns on a radio power switch of a car audio system; The electric field sensitivity of the radio frequency station frequency stored in the state input unit 20 is periodically checked to determine whether the electric field sensitivity is lower than or equal to a predetermined reference value. When the determined current electric field sensitivity is determined to be lower than or equal to the reference value, the radio broadcasting station stored in the memory 10 is stored. Among the frequencies used, search for the frequency of use of the same radio station as the radio station that was listening in the specific area, determine whether the electric field sensitivity is detected above a predetermined reference value, and then use the frequency of the newly discovered radio station. A microcomputer 30 outputting an automatic switching alarm signal informing a driver of a frequency automatic switching signal and an automatic roaming state; An alarm sound generation unit 40 generating an alarm sound according to the automatic switching alarm signal of the microcomputer 30 to notify the driver of an automatic roaming state; And Frequency automatic switching unit 50 for automatically switching the radio frequency of the car audio system using the frequency of the radio station searched in accordance with the frequency automatic switching signal of the microcomputer 30 Radio frequency automatic roaming device, characterized in that consisting of.