JP3467068B2 - Dangerous driving warning system for vehicle, responder and alarm device used for the system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alarm system for preventing a running vehicle from traveling outside a traveling zone of a road, and a responder and an alarm device used in the system. .

[0002]

2. Description of the Related Art Conventionally, as a system for safely guiding the running of a vehicle, a warning device for speed and a collision warning device for warning an abnormal approach to a preceding vehicle or an obstacle have been put into practical use. No system has been put into practical use that warns that the vehicle has left the driving zone on the road surface.

[0003]

SUMMARY OF THE INVENTION In view of the above, in order to prevent the vehicle from traveling outside the traveling zone, the traveling zone boundary line (center line, vehicle passage zone) while the vehicle is traveling is prevented. The subject is to obtain a system that issues an alarm when an abnormal approach is made to the outside line.

[0004]

In order to solve the above-mentioned problems, the present invention , as set forth in claim 1, has a resonance means and is provided at a predetermined position in the traveling zone of the vehicle along the traveling direction of the vehicle. Many are buried at regular intervals, and the
Signal is received, the resonance means excites the resonance signal.
And a response body that is mounted on a vehicle and that is used to excite the resonance means of the response body are intermittently transmitted by radio, and the response body is excited by the excitation signal. The resonance signal returned from the device is received, and the reception level of the resonance signal is compared with the preset level.
Compare to those that constitute the critical driving alarm system of the vehicle, characterized in that is constituted by an alarm device that Hassu risk traveling alarm of the vehicle.

Further, the responding body used in the dangerous traveling warning system is, as described in claim 2, a resonance vibrating body whose resonance frequency is the frequency of the excitation signal sent from the warning device, and the resonance vibration. It is connected to the body and receives the excitation signal sent from the alarm device and applies it to the resonant vibrator.
This having an antenna for emitting a resonant signal is excited to resonance, and generated by the resonance vibration of the resonant vibrator
And are characterized . A piezoelectric vibrating element is used as the resonator , and a crystal oscillator is the most suitable as the piezoelectric vibrating element.

Further, an alarm device used in the dangerous traveling warning system is provided with an antenna as described in claim 3 .
Receiving an oscillator of a high frequency signal, a transmitter for transmitting wirelessly toward the responder via the antenna a radio frequency signal oscillating unit oscillates as excitation signal, a resonance signal sent back from the responder The reception unit, the transmission / reception switching unit that alternately connects the antenna to the transmission unit and the reception unit, and the reception level of the resonance signal received by the reception unit are set in advance.
An alarm level detection unit for outputting a warning level detection signal indicating the critical driving of the vehicle by comparing the set level, the <br/> Ru alarm unit Hassu an alarm by the warning level detection signal from said alarm level detector It is characterized by having.

The alarm device according to claim 4
The antennas on the left and right sides of the vehicle.
The antennas on the left and right are respectively provided in the alarm unit.
The vehicle travels depending on the reception level of the resonance signal that is received.
Identify whether you have approached the left or right of the belt abnormally,
It is characterized by issuing an alarm according to the information.

[0008]

[Action]

Signal transmission / reception operation between the alarm device and the responder: The alarm device alternately repeats the transmitting operation and the receiving operation at a constant cycle, and is an excitation signal for exciting the resonant vibrating body of the responder during the transmitting operation. Is transmitted from the antenna.

When the responder effectively receives the excitation signal, the resonant vibrating body of the responder resonates and vibrates at its resonance frequency, and this resonant vibration causes the alarm device to switch to the receiving operation to cause the exciting signal. Continues to be attenuated for a while even after the transmission of the vibration is interrupted (that is, during the receipt of the excitation signal, the vibration energy is accumulated in the resonance vibrating body, and the vibration energy accumulated at the same time when the accumulation operation of the vibration energy stops The damping vibration of the body is gradually emitted.) This damping vibration is emitted as a resonance signal from the antenna of the responder.

Since the alarm device is in the receiving operation period during the period when the responder emits the resonance signal, the resonance signal from the responder is received by the alarm device and its reception level is detected.

Alarm informing operation: An alarm device mounted on a running vehicle constantly and intermittently sends an excitation signal toward the road surface for exciting a responder buried in the road surface by the above operation. , Oite when the vehicle is traveling on a center of the traveling band (at the time of normal running), example
If between the antenna of the antenna and the response of the alarm device if e is a is kept long intervals charge <br/> fraction, of the excitation signal and the resonant signals between the alarm device and the responder The transfer operation is not performed, or if it is performed, it is performed at an extremely low level. Therefore, in the alarm device, the reception level of the resonance signal does not exceed the set level and the alarm is not issued.

When the vehicle abnormally approaches the boundary line of the traveling zone during traveling (during dangerous driving), the distance between the antennas of both the alarm device and the responder becomes short, and the excitation signal from the alarm device is generated. Is applied to the resonant oscillator of the responder at a high level, the resonant signal from the responder is also emitted at a high level, and the reception level of the resonant signal is increased in the alarm device. The set level is reached and an alarm is issued.

In the above operation, the resonance signal reception level of the alarm device is low when the vehicle is normally traveling, and the reception level is increased when the vehicle is dangerously traveling, as an example. It is also possible to reverse the relationship between the normal traveling / dangerous traveling and the low / high resonance signal reception level.

That is, the embedded position of the response body on the road surface,
It is possible to set the relationship of the mounting position of the antenna of the alarm device to the vehicle so that the interval between both is short during normal traveling and the interval between both is long during dangerous traveling.When set in this way, During normal running of the vehicle, the antennas of both the alarm device and the responder are kept at a sufficiently short distance, so that the exchanging operation of the excitation signal and the resonance signal between the alarm device and the responder is performed. The level of the resonance signal received by the alarm device is maintained at a level higher than the set level because the alarm is performed at a sufficiently high level so that no alarm is issued.

In this state, if the vehicle runs dangerously,
Since the distance between the two antennas becomes sufficiently long, the excitation signal from the alarm device is not applied to the resonant vibrating body of the responder, or even if applied, at a very low level. The resonance signal is not emitted from the responder, or is emitted at an extremely low level even if it is emitted. Therefore, in the alarm device, the reception level of the resonance signal falls below the set level and an alarm is issued.

Classification operation of traveling zone boundary line: By using two antennas mounted on both sides of the vehicle as an alarm device antenna, a separate warning is issued for each type of traveling zone boundary line where the vehicle abnormally approaches. You can

That is, the alarm device alternately performs the exchanging operation of the excitation signal and the resonance signal between the respective antennas and the responder by the switching operation.

During normal running of the vehicle, both antennas of the alarm device keep the distance from the responder within the normal range, so that the reception level of the resonance signal in the alarm device becomes higher than the set level (or higher). It will not go low) and no alarm will be issued from the alarm device.

When the vehicle abnormally approaches the center line,
Right side of the vehicle (right side from the driver's seat in the direction of travel, below,
The reception level of the resonance signal received by the antenna (hereinafter referred to as the first antenna) attached to the same (the same) is attached to the left side of the vehicle (the left side in the traveling direction from the driver's seat, the same applies below). If the vehicle abnormally approaches the outside line of the vehicle lane, the second antenna will be turned on. Thus, the reception level of the resonance signal due to the first antenna exceeds the set level before the reception level of the resonance signal due to the first antenna.

Based on the above operation, the alarm device determines whether the receiving antenna of the resonance signal is the first antenna or the second antenna when the reception level of the resonance signal exceeds the set level. Judgment is made based on the switching control timing of the first antenna and the second antenna, and different alarms are generated depending on whether the center line is abnormally approaching or the vehicle lane outside line is abnormally approaching.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings are all for explaining the embodiments of the present invention, and FIGS. 1 (A), 1 (B) and 1 (C) show a road surface and a buried portion of a responder (hereinafter referred to as a marker). FIG. 2 is a view showing the positional relationship between the traveling vehicle and the marker, FIG. 2A is a side view, FIG. 2B is a front view, and FIGS. 3 and 4 are marker circuit diagrams. 6 and 7 are block diagrams of the alarm device, and FIGS. 7 and 8 are time charts showing the operation of the embodiment.

As shown in FIG. 1 (A) or (B), in the case of a one-lane one-sided road, the road surface 4 usually has a center line 5 at the center of the road surface and a shoulder on the road surface 4 as a boundary line of the vehicle traveling zone. The outside line of the vehicle lane on the side (hereinafter referred to as the outside line) 6
Are marked respectively. Further, as shown in FIG. 1C, in the case of a road having a plurality of lanes on one side, the lane separation line 7 that separates the other lanes from each other is used as the boundary line of the vehicle traveling zone.
Is marked.

In the present invention, as shown in FIG. 1 (A), the marker 2 is provided with a boundary line (center line 5, outer line 6, lane separation line 7) inside the traveling zone of the vehicle. 1), the lane separation line 7 does not exist.) A method of embedding at a constant interval along the vehicle traveling direction in the vicinity of FIG.
As shown in (B) and (C), it can be carried out by two methods, that is, a method of embedding it in the center of each traveling zone at regular intervals along the vehicle traveling direction. Regarding the code of the marker 2, the one embedded near the outer line 6 is designated as "2A",
What is buried near the center line 5 is "2B",
"2C" or "2C-" that is buried in the center of the vehicle running zone
1 "," 2C-2 ", and" 2 "when there is no need to distinguish them from each other.

As described above, a signal (alarm device 1 is provided between the marker 2 buried under the road surface and the alarm device 1 mounted on the vehicle 3 as shown in FIG. 2 (A) or (B). The center line 5 of the vehicle 3 by exchanging the excitation signal sent from the marker 2 and the resonance signal returned from the marker 2 and monitoring the reception level of the resonance signal from the marker 2 received by the alarm device 1. Outside line 6 or lane separation line 7
To detect an abnormal approach to.

FIG. 3 and FIG. 4 each show the structure of the marker 2, and each structure will be described below.

The first embodiment of the marker 2 is, as shown in FIG. 3, a crystal oscillator 201, an antenna 202 and a capacitor 2
And 03 are connected in parallel.

The crystal oscillator 201 is used as a resonance oscillator, and a frequency equal to (as much as possible) the frequency of the excitation signal sent from the alarm device 1 is set as its resonance frequency, and the excitation signal is applied. When it is excited, it resonates and vibrates, and this vibration accumulates vibration energy. When the application of the excitation signal is cut off, the excitation operation stops,
Resonant vibration due to the resonance frequency continues for a while while being attenuated by the vibration energy accumulated up to that point, and a resonance signal is emitted while being attenuated during this period.

As the resonant vibrating body, a piezoelectric vibrating element is generally used (ceramic oscillators in addition to crystal oscillators).
However, among them, the crystal oscillator is most suitable depending on the conditions such as the storage efficiency of vibration energy and the resonance frequency. The resonance frequency of the crystal unit 201 is set to 10 MHz or higher in the embodiment.

The antenna 202 is at most 1 in the embodiment.
It is composed of a loop-type antenna with 0 turns or less, receives an excitation signal from the alarm device 1 and applies it to the crystal oscillator 201, and emits a resonance signal remaining in the crystal oscillator 201 after the excitation is stopped.

Since the antenna 202 needs to be clearly distinguished from the signal transmission / reception in the adjacent traveling zone in the signal transmission / reception operation, in order to obtain a narrow directivity in the direction orthogonal to the vehicle traveling direction. A long and thin marker 2
Is embedded in the road surface 4, the longitudinal direction of the antenna 202 matches the longitudinal direction of the road surface 4 (the traveling direction of the vehicle 3), and the plane formed by the loop of the antenna 202 is parallel to the road surface 4. It is buried in a different posture.

The capacitor 203 is for adjusting the resonance of the crystal unit 201, and is provided as necessary.

As shown in FIG. 4, the second embodiment of the marker 2 is the same as the marker 2 of the first embodiment, except that the antenna 202 is replaced with a loop type antenna and has a dipole type antenna. The antenna 202 has a characteristic that directional characteristics appear in the linear direction. Further, unlike the first embodiment, since there is no short circuit path between the terminals of the crystal unit 201 due to the antenna 202 and the capacitor 203 (the capacitor 203 is not used in the second embodiment), the Q (queue ) Is almost equal to the Q of the crystal unit 201 itself, which is an extremely high value. Therefore, the storage efficiency of the vibration energy is extremely high, and the consumption time of the storage energy is long, so that the residual resonance time (resonance signal emission time) after the excitation is stopped becomes longer than that of the first embodiment. However, the reach distance of the resonance signal becomes shorter than that of the first embodiment.

Further, the marker 2 of the second embodiment is embedded in the road surface 4 in such a posture that the linear direction of the antenna 202 matches the traveling direction of the vehicle 3.

The marker 2 is composed of the above-mentioned three elements (the first element).
Example) or two elements (second example) are housed in an elongated case. The operating energy of the marker 2 is an excitation signal supplied from the alarm device 1, and therefore the marker 2 itself does not require a power source such as a battery.

FIG. 5 and FIG. 6 each show the configuration of the alarm device 1, and each configuration will be described below.

The first embodiment of the alarm device 1 is composed of the respective parts shown in FIG. 5, and the vehicle 3 is concerned regardless of the type of the traveling zone boundary line (center line 5, outer line 6, lane separation line 7). The warning is given only when the vehicle approaches the boundary line of the traveling zone (the type of warning is one).

An oscillating unit 101 oscillates a high frequency signal (a signal of about 10 MHZ) for exciting the marker 2, and the oscillation frequency is the response frequency of the marker 2 (crystal oscillator 2).
01 resonance frequency) is set (as close as possible).

A transmitter 102 amplifies the high-frequency signal input from the oscillator 101 to generate an excitation signal for exciting the marker 2.

Reference numeral 103 denotes a receiving unit which receives the resonance signal returned from the marker 2 and outputs a signal having a level proportional to the reception level (reception level signal).

Both 104A and 104B are transmissions,
The antenna that also serves as a receiver sends the excitation signal output from the transmitter 102 toward the marker 2 and receives the resonance signal returned from the marker 2. The antenna 104
Although A and 104B are provided on both sides of the chassis of the vehicle 3, depending on the embodiment, they may be provided at the center of the chassis and the number thereof may be one (the first antenna 10 of FIG. 2B).
4A, second antenna 104B or antenna 104).

Reference numeral 105 denotes a transmission / reception switching unit, which is an antenna 104A.
And 104B are alternately switched and connected to the transmitting unit 102 and the receiving unit 103 at a constant cycle.

Reference numeral 106 denotes an alarm level detecting section, which is the receiving section 10.
When the reception level signal output from 3 reaches the set level, the alarm level detection signal is output. This alarm level detection signal is, as will be apparent from the operation explanation described later,
It may be configured to be output when the reception level signal rises and reaches the set level, or may be configured to be output when the reception level signal falls and reaches the set level.

Reference numeral 107 denotes a display unit, which is an alarm level detecting unit 10.
An alarm level detection signal is received from 6 and an alarm is displayed. The alarm display is usually used in combination with a visual display (for example, a display for blinking a light emitting element) and an audible display (for example, a display for ringing a buzzer or a display for notifying a danger by voice synthesis).

Reference numeral 108 denotes a switching control section, which is the transmission / reception switching section 1
A transmission / reception switching signal for alternately switching and connecting the antennas 104A and 104B to the transmission unit 102 and the reception unit 103 is transmitted to the transmission unit 05 at a constant cycle.

In the second embodiment of the alarm device 1, as shown in FIG. 6, in addition to the components of the first embodiment, the antenna 1
04A, 104B and the transmission / reception switching unit 105, the antenna switching unit 109, and the alarm level detection unit 106 and the display unit 1.
The display switching section 110 is provided between the display area and the display area, and the type of the traveling zone boundary line, that is, FIG.
In the example shown in (A) or (B), the center line 5
And an outer line 6 are used to issue different types of abnormal approach warnings (two kinds of warnings).

Each part different from the first embodiment will be described.

The antenna switching unit 109 is the antenna 104A.
And 104B are alternately switched and connected to the transmission / reception switching unit 105.

The display switching unit 110 controls the alarm display on the display unit 107 to switch between the abnormal approach to the center line 5 and the abnormal approach to the outer line 6. The switching control is performed in synchronization with the antenna switching unit 109.

The switching control unit 108 sends an antenna switching signal to the antenna switching unit 109 at a predetermined cycle in addition to the transmission / reception switching signal of the first embodiment.

Further, the display unit 107 has the center line 5
And the first display unit 107A and the second display unit 107B that separately display the abnormal approach to the outer line 6, respectively. The difference between the display forms of the first display unit 107A and the second display unit 107B is For example, it can be obtained by providing two light emitting elements for visible display, and can be obtained by providing two kinds of audible display warning sound or warning message by voice synthesis.

The combination of alarm device 1 and marker 2 can be combined with any of the two respective embodiments,
When the marker 2 is the one according to the first embodiment (having a loop type antenna), it is preferable that the antennas 104A and 104B of the alarm device 1 are also loop type,
Further, when the marker 2 is of the second embodiment (having a dipole type antenna), it is preferable that the antennas 104A and 104B are also of dipole type.

When another vehicle traveling in the oncoming lane (or the adjacent lane) is equipped with the same alarm device 1, the excitation signal emitted from the alarm device 1 of the other vehicle is transmitted to the own vehicle. In order to prevent the alarm device 1 from directly receiving and giving a false alarm, the antennas 104A, 1A of the alarm device 1 are provided.
04B is required to have a directivity only in the road surface direction. Further, when the buried portion of the marker 2 is set as shown in FIG. 1 (A), for the same reason (to prevent the resonance signal from the marker 2 excited by the vehicle in the opposite lane from being received), Marker 2 buried near line 5
B is required for each lane (running zone).

Further, the antennas 104A, 1 of the alarm device 1
As shown in FIGS. 2 (A) and 2 (B), 04B is attached to both front lower chassis sides of the vehicle 3. The positional relationship between the marker 2 and the antennas 104A and 104B at the time of dangerous traveling is the first when abnormally approaching the center line 5 when the buried portion of the marker 2 is set as shown in FIG.
When the antenna 104A approaches the marker 2B and the outer line 6 is abnormally approached, the second antenna 104B approaches the marker 2A.
In the case of setting as shown in (B), the above relationship is reversed (in FIG. 2B, the marker 2A indicated by the solid line,
2B and the marker 2C indicated by the broken line, and the mutual positional relationship between the first antenna 104A and the second antenna 104B of the vehicle 3. ).

Further, in the first embodiment of the alarm device 1, there is one antenna attached to the vehicle 3 (the reference numeral of the antenna in this case is 104), and the antenna 104 is provided at the center of the width direction of the vehicle. The present invention can be implemented even with the attached. In this case, the method of burying the marker 2 is preferably the method shown in FIG. 1 (B),
In this case, the antenna 104 is not normally running.
And the marker 2C are close to each other, and the antenna 104 and the marker 2C are separated from each other during dangerous driving. That is, the antenna of the alarm device 1 is provided on both sides of the vehicle.
The transmission and reception of signals between the marker 2C and the alarm device 1 at the time of normal traveling and at the time of dangerous traveling are opposite between the case of using a book and the case of using one provided in the center of the vehicle (the former is set. While a signal is sent and received at a level or above to generate an alarm, the latter issues an alarm when the signal is sent or received at a level or above.

Next, the operation of the embodiment will be described with reference to the time charts shown in FIGS. 7 and 8
Indicates a signal waveform or an operating state at points A to M shown in FIGS. 5 and 6, and the signal waveform is indicated by an envelope.

First, the operation of the system in which the type of the marker 2 is one (the response frequencies are all the same) and the alarm device 1 is that of the first embodiment (shown in FIG. 5) will be described. This system operates like the time chart shown in FIG. In addition, unless otherwise specified, the alarm device 1
One antenna is provided on each side of the vehicle 3 (first antenna 104A, second antenna 104A).
Antenna 104B).

The oscillating unit 101 constantly oscillates a high frequency signal having a frequency equal to the response frequency of the marker 2 (resonance frequency of the crystal oscillator 201) as shown in A of FIG. Note that the equal frequencies here mean that the response frequency of the marker 2 and the frequency of the high-frequency signal oscillated by the oscillator 101 are set as close as possible.

The transmitting unit 102 receives the signal from the oscillating unit 101
The high-frequency signal sent to the point is power-amplified to be an excitation signal for exciting the marker 2, and is sent to the transmission / reception switching unit 105.

The switching control unit 108 sends the transmission / reception switching signal shown in B of FIG. 7 to the point B at a cycle t, and the transmission / reception switching unit 105 makes a cycle according to the transmission / reception switching signal as shown in C of FIG. Switching control between the transmission mode and the reception mode is repeated every t, the antennas 104A and 104B are connected to the transmission unit 102 in the transmission mode, and the antennas 104A and 104B are connected to the reception unit 103 in the reception mode.

The excitation signal transmitted from the transmission unit 102 is applied to the antennas 104A and 104B each time the transmission mode is set by the switching control by the transmission / reception switching unit 105, and has a period of 2t as shown in D of FIG. The antenna 104A, 104B is intermittently emitted toward the marker 2 as a transmission signal that continues for t hours at intervals. This transmission signal is a signal for inquiring the approaching state of the vehicle 3 with respect to the marker 2, and hereinafter, this transmission signal is referred to as an inquiry signal.

The marker 2 is the antenna 104A or 1 described above.
Respond by effectively receiving the interrogation signal emitted from 04B.

That is, when the vehicle 3 abnormally approaches the outer line 6 as shown in FIG.
If it is buried as shown in FIG.
The interrogation signal emitted from the second antenna 104B due to the reduced distance between the marker 2A near the marker 2A and the second antenna 104B enters the antenna 202 of the marker 2A and is applied to the crystal oscillator 201 to excite it. .

When the marker 2 is embedded as shown in FIG. 1B, the distance between the marker 2C at the center of the vehicle traveling zone and the first antenna 104A is shortened, and the marker 2C becomes the first marker. The inquiry signal will be received from the antenna 104A.

Further, when the vehicle 3 approaches the center line 5 abnormally, the above operation is performed between the marker 2B near the center line 5 and the first antenna 104A, or with the marker 2C in the center of the vehicle traveling zone. Second antenna 104B
Between and.

The marker 2 which has received the inquiry signal by the above operation responds as shown in E of FIG. That is, while the interrogation signal is applied via the antenna 202, the crystal oscillator 201 resonates and vibrates at its resonance frequency (which is the same as the interrogation signal frequency), and the alarm device 1
Is switched to the reception mode and the application of the inquiry signal is stopped, the vibration energy accumulated during the excitation period is gradually consumed, and the crystal resonator 201 continues to vibrate while being attenuated at the resonance frequency for a while. .

Further, when the vehicle 3 is traveling normally (when traveling approximately in the center of the vehicle traveling zone), the markers 2A and 2B are used.
Alternatively, 2C and the first antenna 104A, the second antenna 104
Since the distance between the alarm device 1 and the marker B is maintained at a predetermined interval or longer, the signal transfer operation between the alarm device 1 and the marker 2 is not performed, or even if it is performed, it is performed at a low level below the set level. Be done.

The relationship between the emission of the interrogation signal from the alarm device 1 and the resonance vibration of the marker 2 described above is shown in D and E of FIG. 7 for easy understanding. That is, FIG. 7 shows a process in which the vehicle 3 shifts from the normal driving to the dangerous driving. In the first interrogation signal (a) shown in the figure, the vehicle 3 is traveling in the center of the traveling zone and the marker 2 is interrogated. Is not applied and resonance vibration does not occur, but as the vehicle 3 gradually approaches the center line 5 or the outer line 6, the marker 2
Can be seen to receive the interrogation signals (b), (c) ... at a gradually increasing level, and the resonance vibration thereof gradually increases.

As described above, during the residual vibration period which occurs immediately after the crystal oscillator 201 of the marker 2 resonates and vibrates and the application of the inquiry signal is stopped, the antenna 202 of the marker 2 resonates due to the damped resonance vibration. The signal is emitted. This resonance signal answers an inquiry about the presence of the marker 2 by the inquiry signal, and this resonance signal is hereinafter referred to as an answer signal.

When the vehicle 3 approaches the center line 5 or the outer line 6 and the marker 2 responds to the inquiry signal from the alarm device 1 and the above-mentioned answer signal is emitted from its antenna 202, this answer signal is given. Antenna 104 of alarm device 1
It is incident on A or 104B. At this time, the alarm device 1 is switched to the reception mode and the antennas 104A and 104
Since B is connected to the receiving unit 103 by the transmission / reception switching unit 105, the response signal is received by the receiving unit 103 and a reception signal (signal indicating the level of the response signal as shown in F of FIG. ) Is output. This received signal is an envelope of a damped resonance signal generated by the residual vibration of the crystal oscillator 201.

The alarm level detector 106 compares the reception level of the reception signal (answer signal) output at the point (F) with the preset alarm level Ls, and the reception level reaches the alarm level Ls. Then, an alarm level detection signal is output to point G as shown in G of FIG.

When the alarm level detection signal is output to the point G, the alarm unit 107 receives this and displays an alarm. The alarm display is usually a combination of a visual display and an audible display.

The reception mode of the alarm device 1 is the switching control unit 1
08 repeatedly arrives at a time interval 2t that is twice the cycle t of the transmission / reception switching signal. Therefore, when the vehicle 3 is in the dangerous traveling state, the alarm level detection signal is repeatedly transmitted in the cycle 2t.

In the display unit 107, when the warning level detection signal is input in order to continuously display the warning display while the vehicle 3 is driving dangerously, at least the repetition period 2t is repeated. The alarm display is continued for a while, and the alarm display time is extended by 2t each time the alarm level detection signal is input. This can be done, for example, by using a retriggerable multivibrator.

Further, in the alarm level detector 106,
The level of the reply signal from the receiving unit 103 is detected (more specifically, a plurality of levels Ls to be compared are set and it is detected which comparison level the reply signal level has reached), and the alarm unit 107. In, the display form is changed corresponding to the level strength of the reply signal (for example, the color of the visible display is changed depending on the difference in the comparison level reached by the reply signal. Or the audible display is an intermittent audible sound, By changing the intermittent cycle), the warning display for dangerous driving can be changed to a display according to the degree of danger (for example, warning and warning).

The above operation is performed by the antenna 10 on both sides of the vehicle 3.
4A and 104B are provided as an example of operation, but when one antenna 104 is provided at the center of the vehicle 3, the receiving unit 10
When the level of the reply signal from 3 becomes lower than the set level Ls, the alarm level detection unit 106 outputs the alarm level detection signal. However, in this case, the marker 2 is buried in the center of the vehicle running zone.

That is, in FIG. 2B, when the vehicle 3 is traveling normally (when traveling in the center of the vehicle traveling zone), the antenna 104 and the marker 2C are kept below a predetermined distance. The signal transmission / reception operation is repeated between the alarm device 1 and the marker 2C at a set level or more, and when the vehicle 3 is driving dangerously (travel near the center line 5 or the outer line 6). When I do it,
If the distance between the antenna 104 and the marker 2C becomes equal to or larger than a predetermined distance, the signal transfer operation is not performed between the alarm device 1 and the marker 2C, or even if the signal transmission / reception operation is performed, the signal level becomes equal to or lower than the set level. Therefore, if the warning level detection signal is output when the level of the reply signal becomes lower than the set level Ls, the warning can be issued for the dangerous traveling of the vehicle 3.

In order to perform the above operation, the alarm device 1
Is transmitted to the alarm level detecting unit 106 from the transmission / reception switching unit 105 (hereinafter, the antenna 104 is connected to the reception unit 103 in the transmission / reception switching unit 105). A signal which is inverted when the antenna 104 is connected to the transmitter 102 and is re-inverted when the antenna 104 is connected to the transmitter 102 is used as a reception mode state signal.), And the alarm level detector 106 receives the reception mode state signal. When the response signal is received at the set level Ls or higher while is input, the alarm level detection signal is not output, and the response signal is not received while the reception mode state signal is input, or is equal to or lower than the set level Ls. The alarm level detection signal may be output when received at.

Further, the antenna of the alarm device 1 is the antenna 104 at the center of the vehicle 3, and the marker 2 is the center line 5.
2B embedded in the vicinity of each of the outer and outer lines 6
And alarm device 1 and marker 2 in the case of 2A
The signal transmission / reception relationship with A and 2B is the same as when the antenna of the alarm device 1 is the antennas 104A and 104B on both sides of the vehicle 3.

Next, the type of the marker 2 is 1 as in the above.
The operation of the system in which the alarm device 1 is that of the second embodiment (shown in FIG. 6) will be described below. This system operates like the time chart shown in FIG.

In this system, the alarm device 1 requires one antenna on each side of the vehicle 3 (see FIG. 2).
In (B), the first antenna 104A and the second antenna 104B). Further, FIG. 8 shows a case in which the marker 2 is embedded on both sides of the vehicle traveling zone (in the case of FIG.
It is an operation example of A and 2B).

The oscillating unit 101 oscillates a high frequency signal and sends it to the point A, the transmitting unit 102 power-amplifies the high frequency signal sent to the point A to generate an excitation signal, and the transmission / reception switching unit 105 controls the switching control unit. The operation from transmitting / receiving switching signal (cycle t) from the transmission / reception switch 108 every t hours to switching the reception mode and outputting the inquiry signal for each transmission mode is the same as that in the first embodiment (shown in FIG. 5). It is the same.

The switching control unit 108 sends the antenna switching signal indicated by J in FIG. 8 to point J. This antenna switching signal is a signal having a cycle of 2t, which is transmitted at substantially the same timing as the transmission / reception switching signal transmitted to the point B (which is preferably slightly earlier than the transmission / reception switching signal).

As shown by K in FIG. 8, the antenna switching section 109 alternately switches and connects the output of the transmission / reception switching section 105 to the first antenna 104A and the second antenna 104B according to the antenna switching signal. Accordingly, the first antenna 104
Interrogation signals are alternately emitted from A and the second antenna 104B. First antenna 104A and second antenna 10
The interrogation signals emitted from 4B are hereinafter referred to as the first interrogation signal and the second interrogation signal, respectively.

With the above control, the first and second interrogation signals have a period of 4t and the antenna switching unit 109 causes the first antenna 104A and the second antenna 104A to operate with the second interrogation signal, as shown in D1 and D2 of FIG.
In the first half of the time (2t) in which the antenna 104B is connected to the transmission / reception switching unit 105, the first antenna 104A and the second antenna 104B emit light for the time t, respectively, and the emission interval of the first question signal and the second question signal ( The time interval) is 2t. When the vehicle 3 is traveling in the center of the traveling zone, the two antennas 104A and 104B are
Since the space between the markers 2A and 2B on both sides of the traveling zone is kept above a certain level, the antennas 104A and 10B
The markers 2A and 2B do not respond to the interrogation signal emitted from 4B.

When the vehicle 3 approaches the center line 5 while the vehicle 3 is running, the marker 2B resonates in response to the first interrogation signal emitted from the first antenna 104A, as indicated by E1 in FIG. Further, when the vehicle 3 approaches the outer line 6, the marker 2A resonates in response to the second inquiry signal emitted from the second antenna 104B, as indicated by E2 in FIG. The response principle of the markers 2A and 2B is the same as that of the first embodiment, and the markers 2A and 2B each emit a residual resonance signal as a response signal at the moment when the reception mode is set by the switching control of the transmission / reception switching unit 105, The reply signal is input to the receiving unit 103 via the transmission / reception switching unit 105.

The response signal is received by the receiving section 103 without distinction between the response signals from the markers 2A and 2B,
Similar to the first embodiment, an answer signal composed of an envelope of a damped resonance signal is output at point F as shown in F of FIG.
The alarm level detector 106 compares the alarm level Ls with
When the level of the reply signal reaches the alarm level Ls, the alarm level detection signal is output to the point G as shown in G of FIG. This alarm level detection signal is repeatedly transmitted at a cycle of 4t while the vehicle 3 is performing dangerous driving because the transmission cycle of the inquiry signal is 4t.

The alarm level detection signal is sent to the display switching unit 11
It is input to 0, and it is divided into a case where the abnormal approach to the outer line 6 is displayed and a case where the abnormal approach to the center line 5 is displayed.

That is, the display switching unit 110 receives switching information from the antenna switching unit 109 and performs switching control in synchronization with the antenna switching unit 109, as shown by M in FIG. During the signal transmission / reception period with one antenna 104A, the output of the alarm level detection unit 106 (G
Point) is connected to the first display unit 107A, and the output is connected to the second display unit 107B during the signal transfer period between the marker 2A and the second antenna 104B.

Therefore, the two alarm level detection signals shown on the left side in FIG. 8 are input to the first display section 107A,
Similarly, the two alarm level detection signals shown on the right side are input to the second display unit 107B.

In the display unit 107, when a warning level detection signal is input to the first display unit 107A as shown by H1 and H2 in FIG. 8, a center line warning (indicating that the vehicle 3 has approached the center line 5 abnormally) is displayed. Warning) is displayed and the second
When the alarm level detection signal is input to the display unit 107B, an outside line alarm (an alarm indicating that the vehicle 3 abnormally approaches the outside line 6) is displayed.

When the alarm level detection signal is input to the display unit 107, at least the repetition cycle (4
During t), the alarm display is continued and this operation is repeated while the alarm level detection signal is being input so that the alarm is continued, as in the first embodiment.

Further, the alarm level detection unit 106 detects the level of the reply signal from the reception unit 103, and the display unit 1
It is similar to the first embodiment that the display according to the degree of danger of traveling can be displayed on 07.

When the marker 2 is embedded in the center of the traveling zone (marker 2C in FIG. 2B),
As is clear from (B), when the vehicle 3 approaches the outer line 6, the signal is exchanged between the marker 2C and the first antenna 104A, and when the vehicle 3 approaches the center line 5, Marker 2C and second antenna 10
The signal is exchanged with the 4B. That is,
When the vehicle 3 approaches the outside line 6 or the center line 5, the marker 2C transmits / receives a signal to / from the alarm device 1, and the antenna corresponding to the alarm device 1 corresponds to the case where the markers 2A and 2B are provided on both sides of the traveling zone. become. The operation other than the above difference in the correspondence between the antenna and the marker 2C is the same as that of the above-described embodiment.

In addition, as for the type of the traveling zone boundary line, the alarm device 1 is configured such that the response frequency of the marker 2 embedded in the road surface 4 is made different depending on the type of the traveling zone boundary line, or is made different depending on the difference of the traveling zone. It is also possible to make a distinction by performing frequency discrimination of the reply signal, and in this case, it is possible to discriminate more kinds of traveling zone boundary lines.

The configuration of the alarm device 1 in this case is such that, in the two embodiments, the oscillator 101 oscillates a signal in which a plurality of frequency components corresponding to the response frequencies of the plurality of types of markers 2 are mixed. The receiving unit 103 receives the response signal from the marker 2 to perform frequency discrimination, the alarm level detecting unit 106 monitors the alarm level for each discriminated frequency, and the display unit 107.
Is configured to display a separate alarm for each alarm level detection signal output from the alarm level detection unit 106 for each frequency (or a combination of this and the display switching control in the display switching unit 110).

In the above embodiment, for example, as shown in FIG. 1 (C), in a two-lane road on one side, the vehicle 3 approaches the center line 5 and the outer line 6 and the vehicle separates to the lane separation line 7. The approach is also effective in the case where each type is detected and a separate alarm is displayed.

When the marker 2 is embedded in the vicinity of the traveling zone boundary, the response frequency of the marker 2 to be embedded may be different for each type of traveling zone boundary, and the operation in this case can be easily understood. is there. Therefore, the marker 2 is shown in FIG.
As shown in (C), the alarm line 1 is embedded in the center of the traveling zone, and the alarm device 1 having the configuration described above is added to the center line 5, the outer line 6, and the lane separation line 7. A case where the approach of the vehicle 3 is detected for each type and a separate alarm is issued will be described below.

In this case, the marker 2C-1 embedded in the traveling zone near the center line 5 and the marker 2C-2 embedded in the traveling zone near the outer line 6 are set to different response frequencies. The description proceeds with the response frequency of the marker 2C-1 as F1 and the response frequency of the marker 2C-2 as F2.

When the vehicle 3 approaches the center line 5, the alarm device 1 receives the response signal of frequency F1 via the second antenna 104B, and when the vehicle 3 approaches the outer line 6, the alarm device 1 receives the response signal. A response signal of frequency F2 is received via.

When the vehicle 3 approaches the lane separation line 7, the alarm device 1 receives the response signal of the frequency F1 via the first antenna 104A or the second antenna 1
A reply signal of frequency F2 is received via 04B.

As described above, the combination of the antenna for receiving the reply signal and the frequency of the reply signal differs depending on the center line 5, the outer line 6, and the lane separating line 7. Therefore, this combination (that is, display switching) By the combination of the switching control in the section 110 and the discrimination frequency of the reply signal in the receiving section 103), it is possible to identify the above-mentioned three types of traveling zone boundary lines 5, 6, and 7, and to give an alarm to each in a separate display form. Can be displayed.

Although the embodiments described above are examples in which the present invention is applied to a vehicle (automobile) traveling on a road, the present invention generally warns the deviation from the traveling zone of a vehicle traveling without a track. Can be implemented in the device.

[0103]

As described above, according to the present invention, an alarm signal mounted on a vehicle sends an excitation signal to excite a response body composed of a resonator embedded in a road surface, and a resonance signal from the response body is generated. It receives a signal and detects from the received level that the vehicle has approached the boundary line of the traveling zone abnormally, and issues an alarm, which has the following effects.

(1) It is possible to provide a system for issuing a warning to a vehicle traveling abnormally close to the boundary line of the traveling zone, which is particularly effective for a warning about meandering driving due to drowsiness.
It helps to drive safely.

(2) Depending on the embodiment, it is possible to give different alarms for each type of traveling zone boundary line.
It is convenient.

(3) When the present invention is applied to the practice course of the driving school, the instructor can give appropriate instruction without riding in the practice vehicle.

(4) The responder buried in the road surface can be constructed at a very low cost due to the number of parts, and since it operates without a power source, maintenance work such as battery replacement is not required at all, and maintenance of the system is easy.

[Brief description of drawings]

1A, 1B, and 1C are diagrams showing a relationship between a vehicle traveling zone and a marker embedded portion.

FIG. 2 is a diagram showing a positional relationship between a traveling vehicle and a marker,
(A) is a view as seen from the side of the vehicle, and (B) is a view as seen from the front of the vehicle.

FIG. 3 is a circuit diagram of a marker according to an embodiment of the present invention.

FIG. 4 is a circuit diagram of a marker according to an embodiment of the present invention.

FIG. 5 is a block diagram of an alarm device according to an embodiment of the present invention.

FIG. 6 is a block diagram of an alarm device according to an embodiment of the present invention.

FIG. 7 is a time chart showing the operation of the embodiment of the present invention.

FIG. 8 is a time chart showing the operation of the embodiment of the present invention.

[Explanation of symbols]

1 ... Alarm device 2, 2A, 2B, 2C, 2C-1, 2C-2 ... Marker 3 ... Vehicle 4 ... Road surface 5 ... Center line 6 ... Outer line 7 ... Lane separation line 101 ... Oscillation part 102 ... Transmitting part 103 ... Receiver 104, 104A,
104B ... Antenna 105 ... Transmission / reception switching unit 106 ... Warning level detection unit 107 ... Display unit 108 ... Switching control unit 109 ... Antenna switching unit 110 ... Display switching unit 201 ... Crystal oscillator 202 ... Antenna 203 ... Capacitor

Continuation of front page (56) Reference JP-A-1-180015 (JP, A) JP-A-5-73799 (JP, A) JP-A-61-278998 (JP, A) JP-A-1-295311 (JP , A) JP-A-2-73408 (JP, A) JP-A-57-155160 (JP, A) Actually developed S60-116596 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB) Name) G08G 1/00-1/16 G01S 13/93 G08B 21/00 H04B 7/26 G05D 1/02

Claims (4)

(57) [Claims] 1. A plurality of resonating means are embedded in a predetermined portion of a traveling zone of the vehicle at regular intervals along a traveling direction of the vehicle.
However, by receiving the excitation signal from the outside,
The vibrating means excites a resonance signal to oscillate a resonance signal, and an exciting signal for exciting the resonance means of the responsive body, which is mounted on the vehicle, is intermittently transmitted by radio, and the responsive body is the excitation signal. By receiving the resonance signal returned from the responder by being excited, the reception level of the resonance signal and
The dangerous driving warning of the vehicle is compared with the set level that has been set.
Critical driving alarm system of the vehicle, characterized in that is constituted by an alarm device that Hassu. 2. A responder for use in critical driving alarm system of claim 1, a resonant vibrator which the frequency of the excitation signal transmitted from the alarm device and the resonant frequency,
Resonance vibration is applied to the resonance vibrating body by receiving an excitation signal sent from the alarm device and applying it to the resonance vibrating body.
I was excited, and characterized by having an antenna for and release a resonance signal generated by the resonance vibration of the resonant vibrator
Response body. 3. An alarm device for use in the dangerous traveling warning system according to claim 1, wherein an antenna, an oscillating section for high frequency signals, and a high frequency signal oscillated by the oscillating section are used as excitation signals via the antenna. a transmission unit for transmitting wirelessly toward the responder Te, receiving unit for receiving the resonance signals sent back from the responder and, reception switching unit for switching alternately connecting the antenna to a receiving section and the transmitting section And an alarm level detection unit that compares the reception level of the resonance signal received by the reception unit with a preset setting level and outputs an alarm level detection signal indicating a dangerous traveling of the vehicle, and an alarm level detection unit from the alarm level detection unit. alarm device, characterized in that it comprises an alarm unit that Hassu an alarm by the warning level detection signal. 4. The antennas are located on the left and right sides of the vehicle.
Each of the alarm units is provided with the left and right antennas.
The vehicle according to the reception level of each resonance signal received
Discriminates whether or not the vehicle has approached to the left or right of the lane,
A contract characterized by issuing an alarm according to the identified information
The alarm device according to claim 3.