JPH06251288A - On-vehicle beacon receiver - Google Patents

Abstract

PURPOSE:To contribute to safe driving on a two-wheeled vehicle by providing a switch for operating a receiver nearby the handlebars and then operating the receiver without putting a hand off the handlebars. CONSTITUTION:A hand grip 17, a receiver 20, an operation switch 21, and a fuel tank 22 are provided, the receiver 20 is fixed on the fuel tank 22 of the two-wheeled vehicle by a belt 4, and the operation switch 21 is arranged at the grip 17 of the handlebars. The operation switch 21 consists of buttons (a) and (b), connection jacks for the operation switch 21 and receiver 20, and a band for fitting the operation switch. Thus, the operation switch 21 is arranged nearby the grip of the handlebars, so the driver can operate the receiver 20 without putting the hand off the handlebars. For example, even while the two-wheeled vehicle travels on a highway, the receiver 20 can be operated in safety. The operation switch 21 is arranged preferably nearby the grip for the left hand since the grip for the right hand is rotated in wrist so as to operate the accelerator.

Description

Detailed Description of the Invention

[0001]

[Industrial field of use] An in-vehicle beacon receiver that uses a traffic information signal transmitted from a beacon installed at a roadside intersection or the like and displays this on an in-vehicle display device, particularly a motorcycle, a bicycle, etc. The present invention relates to a vehicle-mounted beacon receiver suitable for mounting on a motorcycle.

[0002]

2. Description of the Related Art An antenna (beacon) is installed at each intersection of a road or at a distance of, for example, 300 m, and each beacon installed transmits unique traffic information based on the installation position of the beacon and travels. The vehicle inside receives the transmission signal, displays the information extracted from the reception signal on the in-vehicle display device, and the driver can easily perform various information (for example, traffic congestion information).
A road-to-vehicle information system that can grasp the information has been proposed.

For example, in a vehicle-mounted beacon receiver for a four-wheeled vehicle, for example, a receiving antenna may be fixed to a rear par shell of the vehicle and a receiver may be fixed to a trunk, and the received information may be displayed on a display provided near the driver's seat. It is considered.

Further, although an in-vehicle beacon receiver as a device dedicated to a two-wheeled vehicle has never been proposed, a similar system in the sense of providing various kinds of guidance information to the driver is disclosed in, for example, Japanese Patent Laid-Open No. 59-59. -90200 publication.

[0005]

Information to be provided to a vehicle from a beacon, which is a road-to-vehicle information system, includes information on the current position of the vehicle, guidance information on major facilities, traffic congestion information, etc., as well as accidents, construction, and traffic. A wide variety of regulations, weather conditions, etc. have been proposed, and it is expected that the service information will further increase as it is put into practical use.

Therefore, in the future, not only four-wheeled vehicles, but also two-wheeled vehicles such as motorcycles and bicycles are expected to be provided with information service means.

However, it is difficult to apply a beacon receiver for a four-wheeled vehicle to a two-wheeled vehicle as it is from the viewpoint of vehicle structure, operability, safety, etc. The following points need to be improved.

First, "good operability", second, "good waterproofness", third, "difficult to be stolen", fourth, "compact", etc. Is.
Among these, the improvement of operability is a particularly important issue that must be solved because of the safety factor.

[0009]

[Means for Solving the Problems] In order to solve the above problems, the following means can be considered.

An antenna for receiving an information signal transmitted from a beacon installed on the roadside, a signal processing circuit having a function of processing the received signal and further performing a predetermined process according to a given instruction, and the received information An in-vehicle beacon receiver configured to include a display having a display function, a speaker for outputting a sound signal included in received information, and an operation switch having a function for giving an instruction to a signal processing unit, wherein the antenna includes: A signal processing circuit, a display, and a speaker are housed in at least one housing, and the housing is an in-vehicle beacon receiver having a mounting portion for a vehicle.
Also, an antenna that receives the information signal transmitted from the beacon installed on the roadside, and the received signal is processed,
A signal processing circuit having a function of performing a predetermined process in accordance with a given instruction, a display device having a function of displaying received information, a speaker for outputting a sound signal included in the received information, and giving an instruction to a signal processing means. In a vehicle-mounted beacon receiver for a motorcycle, which is configured to have an operation switch having a function, the antenna, the signal processing circuit, the display, and the speaker are housed in at least one casing, and the casing is for a motorcycle. A vehicle-mounted beacon receiver for a motorcycle, which has a mounting portion, and in which the operation switch has means for attaching to the grip portion of the handle of the motorcycle, is also conceivable.

[0011]

The receiving antenna, the signal processing means, the display means, and the speaker are integrally formed, and they are arranged, for example, on the gasoline tank of the motorcycle, and the operation switch is provided near the handle of the motorcycle.

Since the operation switch is provided in the vicinity of the steering wheel, it is possible to avoid a situation in which the driver performs a hand-over operation to operate the receiver during traveling, and safe operation and operation can be performed.

Further, since the components other than the operation switch are integrally formed, the beacon receiver can be made compact and the waterproof treatment can be easily performed.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is an external view of a receiver showing an embodiment according to the present invention. Reference numeral 1 is a speaker, 2 is a liquid crystal display, 3 is a receiving antenna, 4 is a belt, 5 is an operation switch jack, 6 is a volume adjusting volume, 7 is a battery, and 8 is a rubber pad. Has been done.

First, the information transmitted from the beacon is received by the receiving antenna 3. As shown in FIG. 2, the receiving antenna 3 is small in size by being configured by a microstrip antenna (for example, a dielectric 10 is laminated on a ground pattern 11 and an antenna pattern 9 is further provided). In addition, high-performance reception characteristics can be realized.

Next, as shown in FIG. 3, the receiving antenna 3
The signal received at is demodulated by the receiving unit 12,
The demodulated signal is subjected to data processing by the control unit 13.

The sound signal included in the information is output by the speaker, and the information to be displayed is the display signal.
It is transmitted to the display unit 14.

In the display section 14, for example, processing for displaying information on the liquid crystal display 2 is performed (step 10 in FIG. 4).
0).

The reception information is displayed on the liquid crystal display 2, and a reception sound such as "ponp" is emitted from the speaker 1, and the driver can recognize that the information is received by listening to the reception sound.

Further, the driver confirms the contents displayed on the liquid crystal display 2 and obtains necessary information. The unnecessary information that has been used is erased from the liquid crystal display 2 by clicking the "a button" (15 in FIG. 6) of the operation switch (step 200 in FIG. 4) (step 300 in FIG. 4).

The volume adjusting volume 6 is a volume for adjusting the received sound so that it is transmitted to the driver at an appropriate volume. Further, this receiver is fixed by a belt 4 on, for example, a fuel tank of a two-wheeled vehicle, and the rubber pad 8 has a function of absorbing vibration applied to the receiver.

FIG. 5 shows the situation.

Reference numeral 17 is a handle grip, 20 is a receiver, 21 is an operation switch, and 22 is a fuel tank. The receiver 20 is fixed on the fuel tank of the motorcycle by the belt 4, and the operation switch 21 is arranged on the grip 17 of the handle.

Next, details of the operation switch 21 are shown in FIG.

Reference numeral 15 is an a button, 16 is a b button, 1
8 is a connection jack between the operation switch and the receiver, 19
Is a band for attaching the operation switch.

The connection jack 18 is connected to the connection jack 5 (FIG. 1) of the receiver and serves to inform the receiver of the on / off state of the button of the operation switch.

In this embodiment, as an example, the button a has a function of giving "yes" and the button b has a function of giving "no".

For example, in a beacon system, a place name displayed on a display is usually "distant place name" or "close place name" (for example, when going north on the Tohoku Expressway, "To Aomori" and "To Sendai" are in the same direction. Although there is a mode in which either of them can be set, as shown in FIG. 7, when the information of "far place name" is selected by the cursor 23 When the a button is clicked on, the mode relating to the information of "distant place name" is set.

To switch to the "close place name" information mode, click the b button once, move the cursor 23 so that the "close place name" information is selected, and press the a button to turn on the light. click. This is shown in the flowchart of FIG.

First, the cursor corresponding to "distant place name" blinks (step 800). Next, when the "distant place name" is selected, the a button is clicked (meaning "YES"), and when not selected, the b button is clicked (meaning "NO") (step 801). . If the a button is clicked, the process branches to step 804 and the selection ends. When the b button is clicked, the process proceeds to step 802.

In step 802, "close place name"
The cursor corresponding to blinks.

Furthermore, in step 803, when the "close place name" is selected, the a button is clicked ("Y
Means "ES") and ends the selection (step 80).
3). If the b button is clicked, the process branches to step 800.

As described above, it is understood that the desired mode can be selected by operating the button.

According to this embodiment, since the operation switch is arranged near the grip of the steering wheel, as shown in FIG. 9 (24 is the driver's hand), the driver receives the signal without releasing it. Since the machine can be operated, the receiver can be safely operated even while the motorcycle is traveling on a highway, for example.

Since the grip of the right hand rotates the wrist to open and close the accelerator, it is desirable to arrange this operation switch near the grip of the left hand.

Further, in addition to the receiving antenna, the receiving section, the control section and the display section, the battery and the speaker are integrated to realize a simple and compact structure.

Since it has a simple structure, it also has an advantage that it is easily waterproofed.

In a normal four-wheeled vehicle, since the speaker is provided in a state close to the standard equipment, it is not necessary to integrate the beacon receiver and the speaker.

On the other hand, two-wheeled vehicles that already have a speaker are extremely rare, and it is difficult to attach a single speaker to a two-wheeled vehicle, and a beacon receiver that does not have a speaker provides information. Unless there is a signal that the signal has been received, the display is constantly monitored while driving, which is inconvenient and dangerous.

Further, the receiver is simple, and further,
Since a complicated means is not used for the fixing, the receiver can be easily removed when the driver leaves the motorcycle, and the theft can be prevented. Further, since the rubber pad is laid below, the rubber pad can absorb the vibration.

Further, the operation is simple by limiting the number of operation switches of the receiver to, for example, two. Now, FIG. 10 shows a configuration explanatory diagram of the receiving unit 12 (FIG. 3),
The operation of the receiving unit 12 will be described with reference to the figure.

The road-vehicle distance information received by the receiving antenna 3 is band-limited by a BPF (band-pass filter) 31 in order to prevent mixing of other radio waves, and is supplied to the base of an NPN transistor 34 in an RF amplifier circuit 36. It

The NPN transistor 34 has an emitter electrode grounded, a collector electrode connected to the high-frequency coil 32, and an amplifying action together with a plurality of surrounding passive elements (not shown).

The road-vehicle distance information amplified by the NPN transistor 34 is taken out as an electric signal from the connecting portion between the collector electrode of the NPN transistor 34 and the high frequency coil 32, and is supplied to the base of an NPN transistor 35 provided separately. It

In the NPN transistor 35, the emitter electrode is grounded, the collector electrode is connected to the high frequency coil 33, and the NPN transistor 35 performs an amplifying action together with a plurality of surrounding passive elements (not shown).

The road-vehicle distance information amplified by the NPN transistor 35 is taken out as an electric signal from the connecting portion between the collector electrode of the NPN transistor 35 and the high frequency coil 33, and is supplied to the mixer circuit 37.

A local transmission signal is supplied to the mixer circuit 37 at the same time as the road-vehicle distance information amplified by the RF amplifier circuit 36.

The local oscillation signal is generated by a VCO (voltage controlled oscillator) 60, and its output is taken out as an electric signal from the collector terminal of the NPN transistor 54.

A resonance inductance 55 and a variable capacitance diode 56 are connected to the base terminal of the transistor 54.

The output of the VCO 60 is supplied to the base terminal of the NPN transistor 53.

The NPN transistor 53 has an emitter terminal grounded to GND, a collector terminal connected to the high frequency coil 51, and further performs an amplifying operation together with a plurality of surrounding passive elements (not shown).

The electric signal amplified by the NPN transistor 53 is taken out as an electric signal from the junction of the collector of the NPN transistor 53 and the high frequency coil 51, and NP
It is supplied to the base terminal of the N-transistor 52.

In the NPN transistor 52, the emitter electrode is grounded, and the high frequency coil 5 is connected to the collector electrode.
0 is connected, and also operates as an amplifier circuit together with a plurality of surrounding passive elements (not shown).

The electric signal amplified by the NPN transistor 52 is taken out as an electric signal from the junction between the collector electrode of the NPN transistor 52 and the high frequency coil 50, and is supplied to the mixer circuit 37.

The base terminal of the NPN transistor 52 is
Connected to the frequency divider 57, the local oscillation signal is frequency-divided by N (N is an integer). The signal generated by the frequency divider 57 and the reference signal output from the crystal oscillator 59 are compared by the phase comparator 58.

Phase comparator 58 and NPN transistor 54
The base electrode of is connected and controls the oscillation frequency of the VCO 60 based on the comparison result of the phase comparator 58.

In the mixer circuit 37, the RF signal is frequency-converted into a low frequency signal to generate a so-called IF signal (intermediate frequency signal).

The IF signal generated by the mixer circuit 37 is
Dual gate MOS FET (field effect transistor)
It is supplied to the gate 2 of 38. Dual Gate Mos FE
An output voltage of an AGC (automatic gain control circuit) is applied to the gate 1 of T38, and a capacitor 3 is connected between the source and the ground.
9 and the resistor 42 are connected, and the resistor 40 is connected between the source and the power supply.

A high frequency coil 41 is also connected between the drain and the power supply, and the drain is connected to a BPF 43 which is a bandpass filter.

The IF signal band-limited by the BPF 43 is
It is supplied to the gate 2 of the dual gate MOS FET 44. The gate 1 of the dual gate MOS FET 44 has A
The output voltage of the GC is applied, the capacitor 45 and the resistor 48 are connected between the source and the ground, and the resistor 46 is connected between the source and the power supply.

A high frequency coil 47 is connected between the drain and the power supply, and the drain has an AM demodulation circuit 6
3 and the input terminal of the GMSK demodulation circuit 66.

In the AM demodulation circuit 63, the AM detector 61 first performs AM detection, and the detection output is supplied to the AGC generation circuit 62.

In the AGC generation circuit 62, the output voltage of the AGC is the gate 2 of the dual gate MOS FETs 38 and 44.
To control the amplification degree or attenuation degree of the dual gate MOS FET.

The output of the AM detector 61 is simultaneously output from the BPF.
(Bandpass filter) 67 and the comparator 68 are sequentially supplied to remove unnecessary frequency components, and then converted into a square wave signal.

On the other hand, in the GMSK demodulation circuit 66, after the amplitude is limited by the limiter 64, the GMSK detection process is performed.
The output of the GMSK demodulation circuit 66 is a low pass filter (L
The PF) 69 removes unnecessary frequency components to improve so-called S / N, and the comparator 70 converts the signal into a square wave.

The outputs of the comparators 68 and 70 are connected to the terminal 7
It is supplied to the control unit (13 in FIG. 3) via 1 and 72.

Now, FIG. 11 is an explanatory diagram of the control unit.

The terminal 73 is connected to the terminal 72,
The GMSK-demodulated data signal is supplied from the receiver. The data signal supplied to the terminal 73 is synchronized with the clock internally generated by the clock recovery circuit 75, and the synchronized data and clock are supplied to the gate array 76.

The terminal 74 is connected to the terminal 71,
The AM demodulated position detection signal is supplied to the gate array 76.

Inside the gate array 76, the data is descrambled (“scramble” means to carry out an encryption process to protect the confidentiality of the data, and “disscramble” means to descramble the data. Processing), CRC calculation, vehicle traveling direction determination, and the like.

The display IC 83 converts the received data processed by the gate array 76 into RGB signals for monitor display.

The monitor 84 (corresponding to the display section 14 in FIG. 3) displays the signal from the display IC 83.

The operation switch is, for example, the CPU 8
One interface port may be connected via the switch interface 90.

The instruction given through the operation switch is
The CPU 81 analyzes and executes the instruction corresponding to the given instruction.

A speaker drive circuit 91 for driving a speaker (1 in FIG. 3) is also connected to the CPU 81, and when the information to ring the speaker is extracted, the speaker drive circuit 91 is connected. Let it drive and turn on the speaker.

As described above, by receiving the signal from the beacon and processing the signal, it is possible to provide means for extracting predetermined information and providing the driver with comfortable and safe driving.

[0078]

According to the present invention, since the switch for operating the receiver is provided near the steering wheel, the receiver can be operated without releasing the hand, which can contribute to the safe driving of the two-wheeled vehicle.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a receiving antenna.

FIG. 3 is a block diagram of an in-vehicle beacon receiver.

FIG. 4 is a flowchart illustrating a reception operation of an in-vehicle beacon receiver.

FIG. 5 is an explanatory diagram of an in-vehicle beacon receiver and operation switches.

FIG. 6 is an explanatory diagram of operation switches.

FIG. 7 is an explanatory diagram showing how a display screen is selected.

FIG. 8 is a flowchart illustrating an operation example of buttons a and b.

FIG. 9 is an explanatory diagram of operation switches.

FIG. 10 is an explanatory diagram of an example of the present invention.

FIG. 11 is an explanatory diagram of an example of the present invention.

[Explanation of symbols]

1 ... Speaker, 2 ... Liquid crystal display, 3 ... Receiving antenna, 4 ... Belt, 5 ... Operation switch mounting jack, 6 ... Volume control volume, 7 ... Battery, 8 ... Rubber pad, 9 ... Pattern, 10 ... Dielectric material, 11 ... earth pattern, 12 ... reception part, 13 ... control part, 14 ... display part,
15 ... Operation switch (a button), 16 ... Operation switch (b button), 17 ... Handle grip, 18 ... Receiver mounting jack, 19 ... Operation switch mounting band, 20 ... Receiver, 21 ... Operation switch, 22 ... Fuel tank, 23 ... Cursor, 24 ... Driver's hand, 31 ... Bandpass filter (BPF), 32 ... High frequency coil, 33
... High-frequency coil, 34 ... NPN transistor, 35 ... N
PN transistor, 36 ... RF amplifier, 37 ... Mixer circuit, 38 ... Dual gate MOS FET, 39 ... Capacitance, 4
0 ... Resistor, 41 ... High frequency coil, 42 ... Resistor, 43 ... Band pass filter, 44 ... Dual gate MOS FET,
45 ... Capacitance, 46 ... Resistance, 47 ... High-frequency coil, 48 ...
Resistor, 49 ... IF / AGC circuit, 50 ... High-frequency coil,
51 ... High-frequency coil, 52 ... NPN transistor, 53
... NPN transistor, 54 ... NPN transistor, 5
5 ... Resonance inductance, 56 ... Variable capacitance diode, 57 ... Frequency divider, 58 ... Phase comparator, 5
9 ... TCXO, 60 ... VCO, 61 ... AM detector, 62
... AGC generation circuit, 63 ... AM demodulation circuit, 64 ... Limiter, 65 ... GMSK detection circuit, 66 ... GMSK demodulation circuit, 67 ... Bandpass filter, 68 ... Comparator,
69 ... Low-pass filter, 70 ... Comparator, 71 ...
Terminal, 72 ... terminal, 73 ... terminal, 74 ... terminal, 75 ... clock recovery circuit, 76 ... gate array, 77 ... RAM,
78 ... Oscillator, 79 ... Oscillator, 80 ... ROM, 81 ... C
PU, 82 ... Oscillator, 83 ... Display IC, 84 ... Monitor, 90 ... Switch interface, 91 ... Speaker drive circuit

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Atsushi Uchida 2477 Kashima Yatsu, Katsuta-shi, Ibaraki Pref. 3 Hitachi Automotive Engineering Co., Ltd. (72) Inventor Shiro Horii 2520, Takaba, Katsuta-shi, Ibaraki Stocks Company Hitachi, Ltd. Automotive Equipment Division

Claims (2)

[Claims] 1. An antenna for receiving an information signal transmitted from a beacon installed on the roadside, a signal processing circuit for processing the received signal, and further having a function of performing a predetermined processing according to a given instruction, An in-vehicle beacon receiver configured to include a display having a function of displaying information, a speaker for outputting a sound signal included in received information, and an operation switch having a function of giving an instruction to a signal processing means, An in-vehicle beacon receiver, characterized in that an antenna, a signal processing circuit, a display, and a speaker are housed in at least one housing, and the housing has a mounting portion for mounting on a vehicle. 2. An antenna for receiving an information signal transmitted from a beacon installed on the roadside, a signal processing circuit having a function of processing the received signal and further performing a predetermined process according to a given instruction, A vehicle-mounted beacon receiver for a motorcycle, which includes an indicator having a function of displaying information, a speaker for outputting a sound signal included in received information, and an operation switch having a function of giving an instruction to a signal processing means. The antenna, the signal processing circuit, the display, and the speaker are housed in at least one housing, and the housing has a mounting portion for the two-wheeled vehicle, and the operation switch is for gripping a handle of the two-wheeled vehicle. An on-vehicle beacon receiver for a motorcycle, characterized in that it has means to be provided in a part thereof.