JPH02301329A - Radio receiver - Google Patents

Abstract

PURPOSE:To add a clock function to a QRB system radio receiver by providing a control section setting the time based on a clock information data and the display section of the time at the loading to an attaching case. CONSTITUTION:When a radio receiver main body 1 is loaded to a mother case, the power is supplied to the radio receiver main body 1 via a battery line L1 and the reception is started, then a microcomputer 18 checks whether or not a CT code in RDS(radio data system) codes is superimposed on a received broadcast signal. When the CT code is superimposed, a clock information control section 21 of the microcomputer 18 reads the CT code, adjusts the time based on the read code and displays the present time on a display device 20. Thus, the radio receiver with a clock with the QRB(quick release bracket) system is obtained.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a QRB (quick release bracket) type acoustic device that is installed in the interior of a car and is removable to prevent theft. In particular, the present invention relates to a radio receiver capable of receiving clock information data as well as program contents.

<Prior Art> Conventionally, as this type of audio device, there has been a car audio system such as a cassette tape player with a tuner, which can be removed from a car and taken out to prevent theft.

FIG. 3 is a perspective view showing a QRB type audio device. In the figure, reference numeral 1 denotes the main body of the radio receiver, which is removably attached to a mother case 2 attached to a dash board inside a car.

The main body IK has a handle 3 attached, and the main body, 1
It is designed to be held in an upright position when it is taken out. A first connector 4 is attached to the main body 1, and a second connector 5 is attached to the mother case 2.
These connectors 4.5 fit into each other and are electrically connected.

By the way, in car radios, it is usually operated by the driver, and when the car travels long distances and goes out of the receiving station's service area, it is necessary to reselect the station each time. There has been a need for sophistication. 4
There was a strong demand for this in Europe, where the main radio broadcasting service for If1 is FM broadcasting, which has a relatively narrow service area, and where a high proportion of broadcasts are received on car radios. RDS (Radio Data System) is a data system standardized by the European Broadcasting Union to meet this requirement.

RDS is a method for multiplexing and transmitting various data (data that can be used for automatic selection of the best receiving station, traffic information identification, broadcasting station name display, 9 time setting, etc.) on FM broadcasts. One of those transmitted data is a PTY signal. The PTY signal is a code for identifying program content, and has individual codes depending on the program content, such as classical, rock, popular, and news. Therefore, the program content can be identified by referring to the PTY signal, and the user can arbitrarily select the program content. In addition, if you use the CT scar signal, which is one of the transmitted data and is time information in minutes and is corrected for time difference and summer/winter time, accurate time setting is always possible, and when traveling over a wide area. This is very convenient as it makes it easy to correct time differences depending on the region. Therefore, when the QRB method described above is applied to a receiver capable of receiving RDS broadcasts, the user can enjoy a comfortable performance and at the same time can use the receiver with peace of mind as a radio receiver with an anti-theft function.

<Problems to be Solved by the Invention> However, radio receivers capable of receiving RDS broadcasts using the QRB method usually do not have a clock function.

This is because the main body of the radio receiver is electrically isolated from the mother case, battery, and connector, so even if a clock function is added, power will not be supplied, and the clock will stop working. It is. Therefore, it may be possible to install a battery in the radio receiver body to overcome the above-mentioned drawbacks, but batteries have a limited lifespan.
Furthermore, the cost of the radio receiver itself increases, so it is rarely used in practice. Therefore, even though the user can enjoy radio broadcasts, the user cannot tell the time because the radio receiver does not have a clock, which is extremely inconvenient. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a QRB type radio receiver with a clock by setting the time based on clock information data included in RDS broadcasting when the mounting case of the radio receiver body is inserted.

<Means for Solving the Problems> In the present invention, the above-mentioned problem is solved by adding the above-mentioned radio receiver to a radio receiver which is removably inserted into a mounting case fixed to the vehicle side and is capable of receiving clock information data as well as program contents. This is achieved by including a control section that sets the time based on the clock information data when the device is inserted into the mounting case, and a display section that can display the set time.

<Operation> When the radio receiver main body is inserted into the mounting case, the control section of the radio receiver main body sets the time based on the clock information data, and enables the set time to be displayed on the display section.

<Example> Embodiments of the present invention will be described below with reference to the drawings.

Incidentally, the configuration of the QRB system 1 shown in FIG. 3 is also applied to the embodiment of the present invention.

FIG. 1 is a block diagram of the main parts of an F'M-AM, P-Geo receiver showing a simple embodiment of the present invention, and l is the main body of the radio receiver.

6 is a PLL circuit, which outputs a predetermined voltage signal according to the station to be received to the FM terminal 7. The FM 70 end 7 receives a broadcast station input from the antenna 8 based on a voltage signal, and generates a predetermined intermediate frequency signal (IF). 9 is an intermediate frequency amplification circuit, which amplifies the intermediate frequency signal.

IO is an IF detector, which detects the intermediate frequency signal converted by the front end 7 and amplified by the intermediate frequency amplification circuit. 11 is an FM [l11 circuit, and IP' detector 1
0 detection output is demodulated into a stereo signal. 12 is an amplifier, which amplifies the stereo signal. A speaker 13 is driven by the amplifier 12 and outputs an audio signal corresponding to the stereo signal.

14 is an RDS decoder, which demodulates the PTY code, CT code, etc. sent at a predetermined transmission timing.

15 is an error correction circuit, RDS decoder 14Vc
Demodulated PTY: RDS of f-do, CT code, etc.
Data errors are detected while being synchronized for each group, and the errors are corrected.

16 is a signal meter, which measures the signal strength of the intermediate frequency signal output from the intermediate frequency amplifier 9 (for example, 'electric field 'i!
By monitoring J[), the reception state level of the receiving station (including PTY station and CT station) is detected. Reference numeral 17 denotes an AM receiving section that receives and reproduces AM broadcasting.

18 is a microcomputer that controls the overall operation of the radio data system receiver, and includes a power detection section 19 that detects on/off of the power supply via the battery line L1, and a power supply detection section 19 that is sent superimposed on the received broadcast signal. RDS CT code
It includes a clock information control unit 21 that obtains information via the decoder 14 and error correction circuit 15, controls clock information, and displays the current time on the display 20, and a memory 23 that stores key information of the key operation unit 22. are doing.

In addition to receiving operation input from the AM key 24 and the FM key 25, which are band selection keys among the various operation keys of the key operation unit 21, the Mycoi 18 also operates as shown in FIG. The reception band can also be switched as necessary when the receiver is installed in the mother case 2 on the vehicle side as shown in FIG.

Further, the key operation unit 22 is provided with a time setting key 26, which allows the clock information control unit 21 to be controlled and the time to be adjusted as necessary.

When the radio receiver body 1 is attached to the mother case 2,
It is electrically connected to the car battery 27 and the ignition switch 28 via the connector 4.5, and has 4A, 5A,
4B, 5B, 4C, 5C.

4D, 5D, 4g, and 5g are the battery line terminal, ignition line terminal, ground terminal, antenna terminal, and signal line terminal of connector 4.5, respectively.

Next, the time setting operation according to the present invention will be explained according to the processing flowchart shown in FIG.

When the radio receiver main body 1 is attached to the mother case 2, the main body 1 is electrically connected to the battery 27 via the connectors 4 and 5, and the battery line L is connected.

Power is supplied to the radio receiver main body 1 via.

Note that if the ignition switch (accessory switch) 28 is turned on at this time, current is also supplied from the ignition line L (step 100). Therefore, the power detection section 19 of the microcomputer 18 detects that the power is turned off. Upon receiving the power-on detection, the microcomputer 18 determines whether the band stored in the memory 23 and being received before power-on is AM or FM (step 1).
01). The memory of the microcomputer 18 is backed up by a battery (not shown), so even if the power is turned off, the memory 2
Since the memory contents of No. 3 are not erased, the above determination is possible. If the memory content of the memory 23 is AM, the microcomputer 1
8 switches to FM mode (step 102), supplies power to the front end 7, etc., and, for example, selects the FM mode previously stored in the memory 23 that was received before switching to AM.
The reception status of the last channel/channel is set. Also, memory 2
If the stored content in step 3 is FM, power is supplied to the F'M front end 7, etc., and the reception status is set to the last FM channel stored in the memory 23 that was received before the power was turned off. (Step 103). When reception starts, the microcomputer 18 activates the RDS decoder 14
, C of the RDS code via the error correction circuit 15
It is checked whether the T code is superimposed on the received broadcast signal (step 104). If a CT code is superimposed, the clock information control section 21 of the microcomputer 18 reads the CT code, adjusts the time based on the read code, and displays the current time on the display 20 (Step 7'
105). If the band stored in the memory 231C and received by the mesh 23 before turning on the power is AM (step 106), the microcomputer 18 stores the current time in the memory 23 based on the CT code, and then stops supplying power to the FM front end, etc., and switches from FM broadcast reception mode to AM broadcast reception mode (step 107).

At this time, if the ignition switch is off, A
It enters the standby state of M broadcast reception mode. In this mode, F
Since M broadcasting cannot be received, RDS codes including CT codes cannot be received. Therefore, the clock information control section 13
starts counting the display clock signal independently using the time data stored in the memory 23 as a reference value (step 108). Further, in step 106, if the previous reception band is F'M, the clock information control unit 21
starts counting display clock signals based on the CT code (step 109). In addition, when receiving FM broadcasts, when the user operates the AM key 24 of the key operation unit 22 to switch the band to AM broadcast reception, or when the CT code cannot be obtained even when receiving F'M broadcasts, and when the ignition switch is off, the clock information control section stores the clock signal that was counted based on the CT code in the memory 23 as reference time data, and starts counting independently based on the reference time data.

In step 104, if the CT code is not superimposed, the microcomputer 18 checks the signal strength measured by the signal meter 16, searches for a station with a good reception condition where the signal strength is above a predetermined level, and receives the signal. During this search, [TIMEADJJ is displayed on the display 20 to indicate that the time is being adjusted (step 11).
0). If a station whose CT code is superimposed on the received broadcast signal can be received by the search, the process advances to step 105. If the CT code is not detected and the search is completed after going around the band [returning to the original frequency (step 111),
Indicates that the clock cannot be displayed [ro CLOCKJ should be displayed on the display 20 (step 112), and if the previous reception mode was FM, it remains in FM reception mode and changes to AM.
If it is a broadcast, switch to AM mode. Note that if the ignition switch is off at this time, each mode enters a standby state (step 113) and waits for the ignition switch to be turned on.

In the above embodiment, while receiving the CT code, the clock signal is counted based on the CT code as in step 109, but once time A1i is reached, even if the CT code can be received, a unique clock signal is counted as in step 108. You may also count it. Further, a power switch can also be installed in the radio receiver body in series with the ignition switch 28.

<Effects of the Invention> According to the present invention, a radio receiver that is removably inserted into the mounting case fixed to the vehicle side and capable of receiving clock information data as well as program content can be inserted into the mounting case. Since it is equipped with a control unit that sets the time based on clock information data and a display unit that can display the set time, the QR
It becomes possible to add a clock function to a B-scheme radio receiver, and even users who do not own a watch can easily know the program start time.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the radio receiver of the present invention, FIG. 2 is a flowchart of time correction processing when QRB is on, and FIG. 3 is a perspective view showing a QRB system audio device. 14... RDS decoder, 16... Signal meter, 18... Microcomputer, 19... Power supply detection unit, 21...
...Clock information control unit, 23...Memory.

Claims (1)

[Claims] A mounting case fixed to the vehicle side and removably arranged,
A radio receiver capable of receiving clock information data as well as program content, comprising: a control unit that sets the time based on the clock information data when inserted into the mounting case; and a display unit that can display the set time. A radio receiver characterized by comprising: