KR20000001649A - Best station memory method for car audio system - Google Patents

Abstract

PURPOSE: A best station memory method for a car audio system automatically selects a broadcasting frequency involved into all broadcasting bands of a broadcasting station, when the driver pushes a best station memory(BSM) button by only one time, and then stores the all broadcasting bands in a preset memory. CONSTITUTION: Under the condition that a car driver hears a radio broadcasting corresponding to a specific FM broadcasting frequency, if the car driver pushes a best station memory (BSM) button by only one time, a microcomputer, a PLL IC, a display driver, and a preset memory and so on in a car audio system are operated, broadcasting frequencies having a high electric field effect(i.e., a good receiving sensitivity) among a plurality of broadcasting frequencies included in FM broadcasting band are firstly selected. The selected broadcasting frequencies are automatically memorized in a preset memory of a car audio system. Then, another broadcasting frequencies having a good receiving sensitivity among a plurality of broadcasting frequencies included in another broadcasting bands (for example, AM, FM1,FM2) are also automatically memorized in the preset memory, After that, the car audio system automatically receives an initial broadcasting band memorized in the preset memory. The initial broadcasting band is a FM broadcasting frequency which has the highest electric field and is firstly memorized in the preset memory.

Description

Best station memory method of car audio systems

The present invention relates to a car audio system, and more specifically, when a driver presses a Best Station Memory (BSM) button only once (One touch), broadcast frequencies belonging to all broadcast bands of a broadcast station are automatically selected and preset ( Preset) relates to the best station storage method of a car audio system to be stored in a memory.

In general, the best station storage method used in a car audio system is a method of automatically selecting a radio broadcast frequency belonging to a specific broadcast band (for example, AM, FM1, FM2, etc.) transmitted from a broadcasting station according to electric field strength and storing it in a preset memory. to be.

A process of automatically selecting radio broadcast frequencies belonging to a specific broadcast band by the driver according to the electric field strength by the conventional best station storage method as described above will now be described.

For example, when a driver selects an FM broadcast band by operating a band switching button of a car audio system and is listening to an FM radio station corresponding to a specific broadcast frequency, the driver presses the best station memory button (hereinafter referred to as a BSM button). The audio system first selects a broadcast frequency having a high electric field strength, that is, a broadcast frequency having a good reception sensitivity, among the FM broadcast frequencies belonging to the FM broadcast band, and automatically stores them in the preset memory of the car audio system sequentially.

In this case, the number of FM broadcast frequencies stored in the preset memory may vary according to memory capacity, and is usually limited to about 6 per one broadcast band.

In addition, when the driver selects and presses any one of the preset buttons assigned to 1 to 6 corresponding to the six FM broadcast frequencies sequentially stored in the preset memory, the selected preset among the six FM broadcast frequencies stored in the preset memory. The radio broadcast of the FM broadcast frequency corresponding to the number of the button can be listened to.

However, the best station storage method of the conventional car audio system as described above can automatically store the broadcast frequency in the preset memory only in a specific broadcast band, so that the BSM button and the preset button must be operated separately whenever the broadcast band is changed. There is a feeling.

That is, in order to automatically listen to the AM broadcast by selecting the AM broadcast frequency according to the best station memory method, the driver who was listening to the FM broadcast as described above may re-operate the band switching button to select the AM broadcast band and then the BSM button and preset. There is a problem that the button must be operated again.

Accordingly, the present invention is to overcome the above-described conventional problems, an object of the present invention is to push the BSM button only once (One touch), the broadcast frequency belonging to all broadcast bands of the broadcasting station according to the order of the high field strength It is to provide the best way to remember the car audio system which is automatically selected and stored in the preset memory.

In order to achieve the object of the present invention, the best station storage method of a car audio system includes the steps of selecting a broadcasting frequency belonging to one cycle of the current broadcasting band by the microcomputer, and converting the broadcasting frequency data selected by the microcomputer to the PLL IC of the system. Transmitting to a display driver; detecting a broadcast frequency synchronized with the PLL IC among the broadcast frequency data selected by the microcomputer; and counting an intermediate frequency included in the broadcast frequency synchronized with the PLL IC. Determining a signal meter (SM) value of the corresponding broadcast frequency; storing a broadcast frequency belonging to the current broadcast band in the preset memory according to the magnitude of the signal meter value of the broadcast frequency; Preset by broadcast band in preset memory with preset number of broadcast frequencies Determining whether or not the number of broadcast frequencies stored in the preset memory does not match the number of memories until the number of broadcast frequencies stored in the preset memory matches the number of memories. Repeating the operation; if the number of broadcast frequencies stored in the preset memory for the current broadcast band matches the stored number, does the number of broadcast frequencies of the other broadcast bands stored in the preset memory match the stored number? Determining the number of broadcast frequencies of other broadcast bands stored in the preset memory if the number of broadcast frequencies of the other broadcast bands does not match the number of memories, and then automatically converting to another broadcast band and storing the number of broadcast frequencies of other broadcast bands stored in the preset memory. Repeat the operation of all the above steps until the number matches And if the number of broadcast frequencies stored in the preset memory for the other broadcast bands is the same as the result of the repetition, the broadcast frequency belonging to the initial broadcast band stored in the preset memory after automatically switching to the initial broadcast band. And automatically receiving the first stored broadcast frequency.

The best station storage method of the car audio system of the present invention made as described above is in the state in which the driver operates the band switching button of the car audio system to select an FM broadcast band and then listens to a radio broadcast corresponding to a specific FM broadcast frequency. When the driver presses the BSM button only once, the microcomputer, PLL IC, display driver, and preset memory included in the car audio system operate to operate the broadcasting frequency of the broadcasting frequency belonging to the FM broadcasting band. First, select a good broadcast frequency to automatically store in the preset memory of the car audio system sequentially, and then receive among the broadcast frequencies belonging to all other broadcast bands (eg, AM, FM1, FM2, etc.) other than the FM broadcast band. Broadcast frequencies with good sensitivity are also sequentially stored in the preset memory. Then to remember, and to the car audio system to automatically receive the beginning of the broadcast band, that is the FM broadcast frequencies stored in the first station of the electric field strength is the highest belongs to the FM broadcast band stored in the preset memory.

1 is a flowchart showing a best station memory method of a car audio system according to the present invention.

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

1 is a flowchart showing a best station memory method of a car audio system according to the present invention.

In step S10, the microcomputer selects broadcast frequencies belonging to one cycle of the current broadcast band.

Steps S11 and S12 are steps for transmitting broadcast frequency data selected by the microcomputer to the PLL IC and the display driver of the system.

Steps S13 and S14 are steps for detecting a broadcast frequency synchronized by the PLL IC among the broadcast frequency data selected by the microcomputer.

In steps S15 and S16, the microcomputer determines the signal meter (SM) value of the broadcast frequency according to the result of counting the intermediate frequency included in the broadcast frequency synchronously detected by the PLL IC.

Steps S17 and S18 store the broadcast frequencies belonging to the current broadcast band in the preset memory according to the magnitudes of the signal meter values of the broadcast frequencies.

In step S19, it is determined whether the number of broadcast frequencies stored in the preset memory matches the number of memories for each broadcast band of the preset memory.

In step S20, if the number of broadcast frequencies stored in the preset memory does not match the number of memories, the broadcast frequencies belonging to two cycles of the current broadcast band are selected and the number of broadcast frequencies stored in the preset memory is equal to the number of memories. This step repeats the operations of steps S10 to S19.

In step S21, if the number of broadcast frequencies stored in the preset memory for the current broadcast band matches the number of memories, the step S21 determines whether the number of broadcast frequencies of other broadcast bands stored in the preset memory matches the number of memories. Step.

In steps S22 and S23, if the number of broadcast frequencies of other broadcast bands stored in the preset memory does not match the stored number, the switch automatically switches to another broadcast band and selects broadcast frequencies belonging to one cycle of the other broadcast band and then stores them in the preset memory. The above steps are repeated until the number of broadcast frequencies of other broadcast bands to be stored coincides with the number of memories.

In steps S24 and S25, if the number of broadcast frequencies stored in the preset memory for the other broadcast bands is the same as the result of the repetition, the steps are automatically switched to the initial broadcast band and then belonged to the initial broadcast band stored in the preset memory. It is a step of automatically receiving a broadcast frequency memorized first among broadcast frequencies.

The car audio system operates as follows by the best station memory method of the car audio system according to the present invention made as described above.

In step S10, the microcomputer selects broadcast frequencies belonging to one cycle of the current broadcast band.

The microcomputer primarily selects a broadcast frequency of a specific broadcast band according to local sensitivity when selecting a broadcast frequency for one cycle and secondly according to distance (DX) sensitivity when selecting for two cycles.

In steps S11 and S12, the broadcast frequency data selected by the microcomputer is transmitted to the PLL IC and the display driver of the system.

The display driver displays the broadcasting frequencies sequentially changed so that the driver can see them.

In steps S13 and S14, a broadcast frequency synchronized with the PLL IC is detected in the broadcast frequency data selected by the microcomputer.

The PLL IC has a UNLOCK / LOCK state determined by data transmitted from a microcomputer. The PLL IC enters a locked state when the broadcast frequency data transmitted from the microcomputer is high. Detect.

In steps S15 and S16, the microcomputer determines the signal meter (SM) value of the broadcast frequency according to the result of counting the intermediate frequency included in the broadcast frequency synchronously detected by the PLL IC.

The microcomputer counts the intermediate frequency of the broadcast frequency when the broadcast frequency is detected by the PLL IC, and calculates a signal meter (SM) value of the broadcast frequency for distinguishing the electric field strength, that is, the reception sensitivity, of the broadcast frequency according to the result. . At this time, the signal meter SM is represented by a voltage value of about 0 to 5V.

In steps S17 and S18, the broadcast memory belonging to the current broadcast band is stored in the preset memory according to the magnitude of the signal meter value of the broadcast frequency.

At this time, the microcomputer reads the calculated signal meter values of the broadcast frequencies and grasps the electric field strength of each broadcast frequency according to the magnitude of the signal meter SM, and sequentially stores the signal strengths in the preset memory starting from the broadcast frequency having the high electric field strength. Remember

In step S19, it is determined whether the number of broadcast frequencies stored in the preset memory matches the number of broadcast bands stored in the preset memory.

The preset memory can usually store six broadcast frequencies for each broadcast band, and these six values correspond to the number of memories designated for each broadcast band.

For example, six broadcast frequencies can be stored for the FM broadcast band and the AM broadcast band, respectively.

In the present invention, the number of memories of the preset memory is preferably set to six.

In step S20, if the number of broadcast frequencies stored in the preset memory does not match the number of memories, the broadcast frequencies belonging to two cycles of the current broadcast band are selected and the number of broadcast frequencies stored in the preset memory is equal to the number of memories. The operation of steps S10 to S19 is repeated until it is repeated.

In step S20, assuming that the current broadcast band is an FM broadcast band, the operations of steps S10 to S19 are repeated until all six broadcast frequencies of the FM broadcast band are stored in the preset memory.

In step S21, if the number of broadcast frequencies stored in the preset memory for the current broadcast band matches the stored number for the current broadcast band, it is determined whether the number of broadcast frequencies of other broadcast bands stored in the preset memory matches the stored number. .

In step S21, assuming that the current broadcast band is an FM broadcast band and another broadcast band is an AM broadcast band, all six broadcast frequencies of the FM broadcast band are stored in the preset memory, and then all six broadcast frequencies of the AM broadcast band are preset memory. Is memorized.

In steps S22 and S23, if the number of broadcast frequencies of other broadcast bands stored in the preset memory does not match the number of the memories, the broadcast frequency is automatically switched to the other broadcast bands, the broadcast frequencies belonging to one cycle of the other broadcast band are selected, and the preset memory is stored in the preset memory. The operations of steps S10 to S21 are repeated until the number of broadcast frequencies of other broadcast bands stored matches the number of memories.

In steps S22 and S23, if the current broadcast band is an FM broadcast band and another broadcast band is an AM broadcast band, after all six broadcast frequencies of the FM broadcast band are already stored in the preset memory, the broadcast of the AM broadcast band is performed. The operations of steps S10 to S21 are repeated until all six frequencies are stored in the preset memory.

At this time, even if another broadcast band has an FM1 broadcast band, an FM2 broadcast band, etc. in addition to the AM broadcast band, the operations of steps S10 to S21 are repeated in the same manner.

In steps S24 and S25, if the number of broadcast frequencies stored in the preset memory for the other broadcast bands is the same as the result of the repetition, the apparatus automatically switches to the initial broadcast band and then belongs to the initial broadcast band stored in the preset memory. It automatically receives the first stored broadcast frequency among the broadcast frequencies.

In steps S24 and S25, assuming that the current broadcast band is an FM broadcast band and another broadcast band is an AM broadcast band, all six broadcast frequencies for each of the FM broadcast band and the AM broadcast band are stored in the preset memory. The broadcasting frequency of the broadcasting station, that is, the highest electric field strength among the six broadcasting frequencies belonging to the FM broadcasting band that the driver was listening to first, and automatically stores the broadcasting frequency first stored in the preset memory.

At this time, if the driver selects and presses any one of preset buttons assigned to 1 to 6 corresponding to six FM or AM broadcast frequencies sequentially stored in the preset memory, the six FM or AM broadcasts stored in the preset memory are pressed. It is possible to listen to the radio broadcast of the FM or AM broadcast frequency corresponding to the number of the preset button selected among the frequencies.

As described above, the best station storage method of the car audio system according to the present invention is a sequence in which the broadcasting frequencies belonging to all broadcasting bands of the broadcasting station are high in electric field strength by one-touch operation in which the driver presses the BSM button only once. The driver automatically selects and stores the preset station in the preset memory and automatically listens to the radio station corresponding to the broadcast station with the best electric field strength in the initial broadcast band. There is no need to operate the car audio system to select it, and it has the effect of increasing the convenience of use.

What has been described above is just one embodiment for carrying out the best-station method of the car audio system according to the present invention, and the present invention is not limited to the above-described embodiment, and the present invention is claimed in the following claims. Various changes can be made by those skilled in the art without departing from the gist of the invention.

Claims (1)

Selecting, by the microcomputer, broadcast frequencies belonging to one cycle of the current broadcast band (S10); Transmitting broadcast frequency data selected by the microcomputer to the PLL IC and the display driver of the system (S11 and S12), Detecting broadcast frequencies synchronized by the PLL IC in the broadcast frequency data selected by the microcomputer (S13, S14), Determining, by the microcomputer, a signal meter (SM) value of the broadcast frequency according to a result of counting the intermediate frequency included in the broadcast frequency synchronously detected by the PLL IC (S15, S16), Storing broadcast frequencies belonging to the current broadcast band in the preset memory according to the magnitude of the signal meter values of the broadcast frequencies (S17, S18), Determining whether the number of broadcast frequencies stored in the preset memory matches the number of broadcast bands stored in the preset memory (S19); If the number of broadcast frequencies stored in the preset memory does not match the number of memories, select broadcast frequencies belonging to two cycles of the current broadcast band, and then, until the number of broadcast frequencies stored in the preset memory matches the number of memories. Repeating the operation of all one step (S20), As a result of the repetition, if the number of broadcast frequencies stored in the preset memory for the current broadcast band matches the stored number, determining whether the number of broadcast frequencies of other broadcast bands stored in the preset memory matches the stored number (S21). ), If the number of broadcasting frequencies of other broadcasting bands stored in the preset memory does not match the number of the above-mentioned memory, it automatically switches to another broadcasting band, selects broadcasting frequencies belonging to one cycle of the other broadcasting band, and then Repeating all the above-described operations until the number of broadcast frequencies coincides with the stored number (S22, S23), and As a result of the repetition, if the number of broadcast frequencies stored in the preset memory for the other broadcast bands coincides with the number of the memories, the broadcast station automatically switches to the initial broadcast band and stores the first among the broadcast frequencies belonging to the initial broadcast band stored in the preset memory. Automatically receiving the received broadcast frequency (S24, S25) Best country memory method of the car audio system, characterized in that consisting of.