WO2017077593A1 - Récepteur d'émissions - Google Patents

Récepteur d'émissions Download PDF

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Publication number
WO2017077593A1
WO2017077593A1 PCT/JP2015/081013 JP2015081013W WO2017077593A1 WO 2017077593 A1 WO2017077593 A1 WO 2017077593A1 JP 2015081013 W JP2015081013 W JP 2015081013W WO 2017077593 A1 WO2017077593 A1 WO 2017077593A1
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WO
WIPO (PCT)
Prior art keywords
reception
broadcast
frequency
khz
tuner
Prior art date
Application number
PCT/JP2015/081013
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English (en)
Japanese (ja)
Inventor
秀樹 松本
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2017548555A priority Critical patent/JP6246450B2/ja
Priority to PCT/JP2015/081013 priority patent/WO2017077593A1/fr
Publication of WO2017077593A1 publication Critical patent/WO2017077593A1/fr

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/18—Automatic scanning over a band of frequencies
    • H03J7/20—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits

Definitions

  • the present invention relates to a broadcast receiver that receives broadcast waves having different frequency intervals of broadcast carriers depending on the broadcast area, such as AM (Amplitude Modulation) radio.
  • AM Amplitude Modulation
  • the frequency interval of the AM radio broadcast carrier is divided into 9 kHz and 10 kHz depending on the region. For example, it is 9 kHz in Japan, Australia, Europe, etc., and 10 kHz in the United States, Canada, etc. For this reason, when the broadcast receiver sequentially receives broadcasts from AM radio broadcast stations, the broadcast is received at the reception step of the frequency interval corresponding to the area where the broadcast receiver is present. Therefore, when the broadcast receiver moves to an area corresponding to a reception step different from the set reception step, the broadcast receiver needs to switch to the reception step corresponding to the destination area.
  • the AM radio broadcast reception step is switched in accordance with the time when the button is pressed by the user.
  • the broadcast receiver moves to a different area of the reception step, it can be switched to the reception step corresponding to the destination area.
  • Patent Document 2 describes an AM receiver that automatically switches to a reception step corresponding to a destination area.
  • the AM receiver compares the electric field strength level obtained in one of the different scanning steps with the electric field strength level obtained in the other scanning, and determines the receiving step with the larger electric field strength level. Switch automatically.
  • the reception step corresponding to the region of the movement source is a broadcast receiver. Will remain set to. In this case, even if the reception characteristics of the broadcast deteriorate due to a difference in the reception step, the user does not notice that the reception step corresponding to the movement source area is set incorrectly, and the broadcast reception characteristics are deteriorated. It may continue for a long time.
  • the AM receiver described in Patent Document 2 can automatically switch to a reception step corresponding to a destination area even if the AM receiver moves between areas having different reception steps.
  • the reception frequency when the reception frequency is sequentially set in one reception step and the electric field strength of a certain level or more is detected, the reception frequency is continuously set in the other reception step to detect the electric field strength. ing. For this reason, when scanning of the reception frequency is started in one reception step, scanning of the reception frequency in the other reception step cannot be performed until the electric field strength of a certain level or more is detected, and the determination efficiency of the reception step There was a problem of being bad.
  • This invention solves the said subject, and it aims at obtaining the broadcast receiver which can determine the receiving step corresponding to the present area efficiently, and can switch automatically.
  • the broadcast receiver includes a tuner control unit, a reception availability determination unit, and a reception step determination unit.
  • the tuner control unit alternately sets the reception frequency in the tuner circuit at different reception steps in the broadcast frequency band to be received.
  • the reception availability determination unit determines whether or not a broadcast having a reception frequency set in the tuner circuit by the tuner control unit can be received.
  • the reception step determination unit determines a reception step of the broadcast frequency band to be received from among different reception steps based on the determination result of the reception availability determination unit.
  • the reception frequency is alternately set in the tuner circuit at different reception steps to determine whether or not the reception frequency broadcast can be received, and the reception step of the broadcast frequency band to be received is determined based on the determination result. .
  • the reception step corresponding to the present area can be determined efficiently, and the reception step can be automatically switched based on the determination result.
  • FIG. 3 is a block diagram showing a functional configuration of a broadcast receiver according to Embodiment 1.
  • FIG. 3 is a block diagram showing a hardware configuration that realizes the function of the broadcast receiver according to Embodiment 1.
  • FIG. 2 shows a hardware configuration for executing software that implements the functions of the broadcast receiver according to the first embodiment.
  • 3 is a flowchart showing an operation of the broadcast receiver according to the first embodiment.
  • 4 is a flowchart showing a specific operation of the broadcast receiver according to the first embodiment. It is a figure which shows the outline
  • FIG. 1 is a block diagram showing a configuration of a broadcast receiver 1 according to Embodiment 1 of the present invention.
  • the broadcast receiver 1 is a broadcast receiver that receives broadcasts having different frequency intervals of broadcast carriers depending on regions, and is realized as, for example, an in-vehicle radio broadcast receiver.
  • the broadcast receiver 1 may be provided as one radio broadcast receiver, but may be provided as one of the functions of the in-vehicle audio device.
  • the broadcast receiver 1 is connected to an antenna 2, a speaker 8, and a monitor 9.
  • a tuner circuit 3, a control unit 4, an input circuit 5, an audio output circuit 6, and a display control circuit 7 are provided. Is provided.
  • the tuner circuit 3 is a circuit that extracts a reception signal having a preset reception frequency from an RF (Radio Frequency) signal received by the antenna 2.
  • the control unit 4 is realized by a microcomputer or a dedicated processing circuit, and controls operations of the tuner circuit 3 and the display control circuit 7. For example, the tuner circuit 3 extracts a reception signal having a reception frequency set by the control unit 4 from the RF signal.
  • the receiving step determination process and the switching process in the present invention are executed under the control of the control unit 4.
  • the input circuit 5 is a circuit that receives information input from the outside of the broadcast receiver 1, and outputs information input using a touch panel, key buttons, and the like to the control unit 4. For example, when the broadcast receiver 1 has a preset memory in which the frequency of receivable broadcast stations searched in advance is stored for each channel, the input circuit 5 has a preset key for designating a desired broadcast station channel from the preset memory. Accepts input.
  • the audio output circuit 6 is a circuit that amplifies the audio signal input from the tuner circuit 3 and outputs the amplified audio signal to the speaker 8.
  • the display control circuit 7 is a circuit that controls display of information on the monitor 9. For example, the display control circuit 7 controls the monitor 9 to display the reception frequency according to an instruction from the control unit 4.
  • the speaker 8 is, for example, a vehicle-mounted speaker disposed in a vehicle, and outputs a sound signal such as radio sound.
  • the monitor 9 is a display device that displays various information such as a reception frequency.
  • FIG. 2 is a block diagram showing a functional configuration of the broadcast receiver 1 and shows functions realized by the control unit 4.
  • the control unit 4 includes a tuner control unit 40, a reception availability determination unit 41, and a reception step determination unit 42.
  • the tuner control unit 40 sets the reception frequency in the tuner circuit 3 alternately in the 9 kHz reception step and the 10 kHz reception step in this broadcast frequency band.
  • the tuner circuit 3 extracts the reception signal having the reception frequency set by the tuner control unit 40 from the RF signal received by the antenna 2. Further, when the tuner circuit 3 extracts the reception signal having the reception frequency, the tuner circuit 3 outputs the electric field strength of the reception signal to the tuner control unit 40.
  • the reception availability determination unit 41 determines whether or not the tuner control unit 40 can receive a broadcast having the reception frequency set in the tuner circuit 3. For example, the reception propriety determination unit 41 compares the electric field strength of the reception signal input from the tuner control unit 40 with a preset lower limit value of the receivable electric field strength. It is determined that the broadcast cannot be received, and if it is equal to or higher than the lower limit value, it is determined that the broadcast at the reception frequency can be received.
  • the reception step determination unit 42 determines the reception step of the AM radio broadcast frequency band from the reception step of 9 kHz and the reception step of 10 kHz based on the determination result of the reception availability determination unit 41. For example, when it is determined that the broadcast having the reception frequency set in the reception step of 9 kHz is receivable, the reception step determination unit 42 determines that the reception step of the AM radio broadcast frequency band is 9 kHz, and the tuner control unit Set to 40. Thereby, the tuner control unit 40 sets the reception frequency in the reception step of 9 kHz when receiving the AM radio broadcast.
  • the reception frequency can be scanned at the reception step of 10 kHz until an electric field strength of a certain level or more is detected. There wasn't. For this reason, if the region corresponding to the reception step of 10 kHz is not scanned for all frequencies from 522 kHz to 1629 kHz that can be set in the reception step of 9 kHz, it is possible to shift to scanning of the reception frequency in the reception step of 10 kHz. There wasn't.
  • the reception step is determined by alternately setting the reception frequency at the reception step of 9 kHz and the reception frequency at the reception step of 10 kHz. Therefore, the reception frequency scan is not performed biased toward one reception step as in the conventional case, and the reception step corresponding to the current region can be determined efficiently.
  • FIG. 3A shows a hardware configuration that implements the function of the broadcast receiver 1
  • FIG. 3B shows a hardware configuration that executes software that implements the function of the broadcast receiver 1.
  • FIG. 4 is a flowchart showing the operation of the broadcast receiver 1, and the broadcast receiver 1 functions by executing the steps shown in FIG.
  • Each function of the tuner control unit 40, the reception availability determination unit 41, and the reception step determination unit 42 in the broadcast receiver 1 is realized by a processing circuit. That is, the broadcast receiver 1 is capable of receiving a broadcast at the reception frequency set by the tuner control unit 40 in step ST1 in which reception frequencies are alternately set in different reception steps in the broadcast frequency band to be received shown in FIG.
  • the processing circuit for performing step ST3 for determining a reception step of the broadcast frequency band to be received from among different reception steps based on the determination result of the reception possibility determination unit 41.
  • the processing circuit may be dedicated hardware or a CPU (Central Processing Unit) that executes a program stored in the memory.
  • CPU Central Processing Unit
  • the processing circuit 100 when the processing circuit is a dedicated hardware processing circuit 100, the processing circuit 100 may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC ( An application specific integrated circuit (FPGA), a field-programmable gate array (FPGA), or a combination thereof is applicable.
  • the functions of the tuner control unit 40, the reception possibility determination unit 41, and the reception step determination unit 42 may be realized by a processing circuit, or the functions of the units may be realized by a single processing circuit. .
  • the processing circuit is the CPU 101
  • the functions of the tuner control unit 40, the reception availability determination unit 41, and the reception step determination unit 42 are realized by software, firmware, or a combination of software and firmware.
  • Software and firmware are described as programs and stored in the memory 102.
  • the CPU 101 reads out and executes the program stored in the memory 102, thereby realizing the functions of each unit. That is, the broadcast receiver 1 includes a memory 102 for storing a program that, when executed by the CPU 101, results from the processing from step ST1 to step ST3 shown in FIG.
  • these programs cause the computer to execute the procedures or methods of the tuner control unit 40, the reception availability determination unit 41, and the reception step determination unit 42.
  • the memory is, for example, a RAM (Random Access Memory), ROM, flash memory, EPROM (Erasable Programmable ROM), EEPROM (Electrically Programmable EPROM), or other nonvolatile or volatile semiconductor memory, magnetic disk, flexible disk, Optical discs, compact discs, mini discs, DVDs (Digital Versatile Disk), and the like are applicable.
  • RAM Random Access Memory
  • ROM Read Only Memory
  • EPROM Erasable Programmable ROM
  • EEPROM Electrically Programmable EPROM
  • magnetic disk magnetic disk
  • flexible disk Optical discs
  • compact discs compact discs
  • mini discs mini discs
  • DVDs Digital Versatile Disk
  • the tuner control unit 40 realizes its function with a dedicated hardware processing circuit 100, and the reception permission determination unit 41 and the reception step determination unit 42 are executed by the CPU 101 executing a program stored in the memory 102. Realize its function.
  • the processing circuit can realize the above-described functions by hardware, software, firmware, or a combination thereof.
  • FIG. 5 is a flowchart showing a specific operation of the broadcast receiver 1 according to the first embodiment, and a series of determining the reception frequency of the AM radio by determining the reception step (9 kHz or 10 kHz) corresponding to the current region. Shows the processing.
  • the process of step ST1a, step ST2a, and step ST4a in FIG. 5 is an example of detailed process of step ST1 shown in FIG.
  • the processing of step ST3a and step ST5a is an example of detailed processing of step ST2 shown in FIG. 4
  • the processing of step ST6a to step ST8a is an example of detailed processing of step ST3 shown in FIG. . Therefore, the operation of each step in FIG. 4 becomes clear by explaining each step in FIG. 5, and will be described below with reference to FIG. Note that the processing from step ST9a to step ST11a in FIG. 5 shows a normal seek operation after the reception step is confirmed.
  • the tuner control unit 40 confirms whether or not the AM radio broadcast reception step has been confirmed (step ST1a). For example, when the broadcast receiver 1 is turned off, the tuner control unit 40 deletes the reception steps that have been determined so far. When the broadcast receiver 1 is activated and seeks a broadcast station for the first time, the tuner control unit 40 determines that the AM radio broadcast reception step has not been determined (step ST1a; NO).
  • the tuner control unit 40 sets the reception frequency in the tuner circuit 3 in the reception step of 9 kHz for the tuner circuit 3 (step ST2a).
  • the tuner circuit 3 extracts a reception signal having a reception frequency from the RF signal received by the antenna 2 and outputs the electric field strength of the reception signal to the tuner control unit 40.
  • the tuner control unit 40 outputs the electric field strength of the reception signal input from the tuner circuit 3 to the reception availability determination unit 41.
  • the reception availability determination unit 41 determines whether or not the broadcast at the reception frequency set by the tuner control unit 40 can be received (step ST3a). For example, as described above, the reception availability determination unit 41 compares the electric field strength of the reception signal input from the tuner control unit 40 with a preset lower limit value of the receivable electric field strength, and is less than the lower limit value. In some cases, it is determined that the broadcast at the reception frequency cannot be received.
  • the receivability determination unit 41 notifies the tuner control unit 40 of this.
  • the tuner control unit 40 sets the reception frequency in the reception step of 10 kHz for the tuner circuit 3 (step ST4a). That is, in the tuner circuit 3, 530 kHz which is the lower end frequency in the reception step of 10 kHz is set as the reception frequency.
  • the tuner circuit 3 extracts a reception signal having a reception frequency from the RF signal received by the antenna 2 and outputs the electric field strength of the reception signal to the tuner control unit 40 in the same manner as described above.
  • the tuner control unit 40 outputs the electric field strength of the reception signal input from the tuner circuit 3 to the reception availability determination unit 41.
  • the reception availability determination unit 41 determines whether or not the broadcast at the reception frequency set by the tuner control unit 40 can be received (step ST5a). If it is determined that the broadcast at the reception frequency is not receivable (step ST5a; NO), the receivability determination unit 41 notifies the tuner control unit 40 of this. Upon receiving the above notification from the reception availability determination unit 41, the tuner control unit 40 returns to step ST2a and sets the tuner circuit 3 to 529 kHz, which is the next frequency in the 9 kHz reception step.
  • the reception step of 9 kHz and the reception step of 10 kHz are alternately performed as shown by the solid line arrow in FIG. Then, the reception frequency is set in the tuner circuit 3, and it is determined whether or not the reception frequency broadcast can be received.
  • the reception availability determination unit 41 When determining that the broadcast having the reception frequency set in the reception step of 9 kHz is receivable (step ST3a; YES), the reception availability determination unit 41 notifies the tuner control unit 40 of this. When receiving the above notification from the reception availability determination unit 41, the tuner control unit 40 determines the reception frequency at this time as a seek result (step ST6a). In addition, when it is determined by the reception availability determination unit 41 that the broadcast having the reception frequency set in the reception step of 10 kHz can be received (step ST5a; YES), the tuner control unit 40 similarly performs this operation. Is determined as the seek result.
  • the tuner control unit 40 is instructed to set the reception frequency in the reception step of 10 kHz.
  • the tuner circuit 3 is made to set the reception frequency in order at the reception step of 9 kHz.
  • the reception availability determination part 41 determines the reception availability of the broadcast of the reception frequency set in order at the reception step of 9 kHz. For example, as shown in FIG. 6, when it is determined that a 549 kHz broadcast can be received first, 558 kHz and 567 kHz are sequentially set in the 9 kHz reception step.
  • the tuner circuit 3 sequentially receives the reception frequency in the reception step of 10 kHz as indicated by the chain line arrow in FIG. Set to For example, as shown in FIG. 6, when it is determined that 550 kHz broadcast can be received first, 560 kHz and 570 kHz are set in order in the 10 kHz reception step.
  • the reception step determination unit 42 confirms whether or not the broadcasts of the reception frequencies set in order in the reception step in which the reception frequency is determined in step ST6a are determined to be continuously receivable for a predetermined number of times.
  • the reception step determination unit 42 can continuously receive broadcasts of these reception frequencies. Check if it has been determined.
  • the reception step determination unit 42 When it is determined that the broadcasts of the reception frequencies set in order in the reception step in which the reception frequency is determined in step ST6a can be continuously received for a predetermined number of times (step ST7a; YES), the reception step determination unit 42 The reception step at this time is determined as the AM radio reception step and set in the tuner control unit 40. Thereby, the AM radio reception step is determined (step ST8a).
  • the AM radio reception step is 9 kHz. To be confirmed.
  • the reception step of AM radio is 10 kHz. To be confirmed.
  • step ST7a the reception step determination unit 42 terminates the process without determining the AM radio reception step. In this case, since the reception frequency of the AM radio is fixed, broadcasting of this reception frequency is received. Since the reception step has not been determined, the processing from step ST1a is executed at the next seek performed periodically or when the broadcast receiver 1 is activated.
  • the tuner control unit 40 sets the reception frequency in the tuner circuit 3 in the confirmed reception step (step ST9a).
  • the reception propriety determination unit 41 determines whether or not there is a frequency at which broadcast can be received among all the reception frequencies that can be set in the confirmed reception step (step ST10a).
  • the tuner control unit 40 deletes the confirmed reception step, returns to the process of step ST2a, and determines the reception step. By doing in this way, switching of a reception step can be performed exactly.
  • the tuner control part 40 determines the receiving frequency at this time as a seek result (step ST11a).
  • the broadcast receiver 1 sets the reception frequency in the tuner circuit 3 alternately in the reception step of 9 kHz and the reception step of 10 kHz in the broadcast frequency band of the AM radio, and sets the reception frequency. Whether or not the broadcast can be received is determined, and the reception step of the AM radio broadcast is determined based on the determination result. Thereby, the reception step corresponding to the present area can be determined efficiently, and the reception step can be automatically switched based on the determination result.
  • the tuner control unit 40 when the tuner control unit 40 determines that the reception frequency determination unit 41 can receive a broadcast at the reception frequency, the tuner control unit 40 sets the reception frequency in the reception step at this time. Set in order.
  • the reception step determination unit 42 receives the broadcast at the reception frequency set in order by the tuner control unit 40 when the reception determination unit 41 determines that the reception frequency can be received continuously for a predetermined number of times.
  • the step is determined to be an AM radio reception step.
  • the tuner control unit 40 performs the tuner circuit 3 at the reception step in the broadcast frequency band to be received. If reception of all the reception frequencies set in the tuner circuit 3 in the reception step is determined not to be received by the reception determination unit 41, the reception frequency is alternately set in the tuner circuit 3 in different reception steps. To do. As a result, even if the broadcast receiver 1 moves to a different area of the reception step, it is possible to accurately execute the determination and switching of the reception step corresponding to the movement destination area.
  • the broadcast receiver 1 according to the present invention is an AM radio receiver.
  • the present invention is not limited to this.
  • FM Frequency Modulation
  • the present invention is not limited to AM broadcast and FM broadcast, and can be applied as long as the broadcast carrier frequency interval differs depending on the region.
  • any component of the embodiment can be modified or any component of the embodiment can be omitted within the scope of the invention.
  • the broadcast receiver according to the present invention is suitable for an on-vehicle broadcast receiver, for example, because it can efficiently determine and automatically switch the reception step corresponding to the current region.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

La présente invention concerne une unité de commande d'accordeur (40) qui règle, dans un circuit d'accordeur (3), des fréquences de réception dans l'ordre, alternativement dans une étape de réception de 9 kHz et une étape de réception de 10 kHz. Une unité de détermination reçue/non reçue (41) détermine si des émissions aux fréquences de réception peuvent être reçues. Une unité de détermination d'étape de réception (42) détermine, sur la base d'un résultat de détermination provenant de l'unité de détermination reçue/non reçue (41), une étape de réception d'émission radio AM entre l'étape de réception de 9 kHz et l'étape de réception de 10 KHz.
PCT/JP2015/081013 2015-11-04 2015-11-04 Récepteur d'émissions WO2017077593A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2017548555A JP6246450B2 (ja) 2015-11-04 2015-11-04 放送受信機
PCT/JP2015/081013 WO2017077593A1 (fr) 2015-11-04 2015-11-04 Récepteur d'émissions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2015/081013 WO2017077593A1 (fr) 2015-11-04 2015-11-04 Récepteur d'émissions

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WO2017077593A1 true WO2017077593A1 (fr) 2017-05-11

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PCT/JP2015/081013 WO2017077593A1 (fr) 2015-11-04 2015-11-04 Récepteur d'émissions

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* Cited by examiner, † Cited by third party
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EP4008471A1 (fr) 2020-12-02 2022-06-08 Fronius International GmbH Méthode et dispositif de soudage avec détection de contacts électriques au cours d'un procédé de soudage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5885623A (ja) * 1981-11-18 1983-05-23 Pioneer Electronic Corp Ａｍ受信機の同調方法
JPH02205108A (ja) * 1989-02-03 1990-08-15 Hitachi Ltd 受信ステップ切替装置
JP2002164768A (ja) * 2000-11-29 2002-06-07 Sanyo Electric Co Ltd ラジオ放送受信機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5885623A (ja) * 1981-11-18 1983-05-23 Pioneer Electronic Corp Ａｍ受信機の同調方法
JPH02205108A (ja) * 1989-02-03 1990-08-15 Hitachi Ltd 受信ステップ切替装置
JP2002164768A (ja) * 2000-11-29 2002-06-07 Sanyo Electric Co Ltd ラジオ放送受信機

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JPWO2017077593A1 (ja) 2017-12-14

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