JP2009184416A - Alarm system of motorcycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an alarm system of a motorcycle capable of suppressing any increase in cost of the motorcycle, effectively using a body space, and enhancing the accuracy of the alarm device. <P>SOLUTION: The alarm system 120 of the motorcycle comprises a steering angle sensor 48 for detecting the steering angle of a bar handle for steering a front wheel, a storage device 130 for storing the steering angle of the bar handle after the predetermined ignition operation, and an alarm device 54 which detects the predetermined change of the steering angle stored by the storage device 130 and emits the alarm sound. The alarm system 120 is constituted by using the steering angle sensor 48 provided on the motorcycle. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an improvement of an alarm device for a motorcycle.

As a conventional alarm device, one that detects rotation of a bicycle rim with a sensor and issues an alarm with a buzzer is known (for example, see Patent Document 1).
Japanese Utility Model Publication No. 6-18182

1 and 2 of Patent Document 1 will be described.
The alarm device includes a magnet 4 attached to the rim of the bicycle, a reed relay 1 attached to the frame so as to be turned on / off by the rotation of the magnet 4, and energized when the reed relay 1 is turned on. An electronic buzzer 2 that issues an alarm and a switch 3 that forcibly stops energization of the electronic buzzer 2 to stop the alarm are provided.

In the above alarm device, the number of parts for issuing an alarm is increased, and it is necessary to provide attachment parts for attaching these parts to each part of the bicycle, which greatly increases the cost.
Further, since the alarm is issued when the magnet 4 and the reed relay 1 come close to each other, even if the magnet 4 rotates at a position away from the reed relay 1, the rotation of the rim is not detected. Is low.

  An object of the present invention is to suppress an increase in the cost of a motorcycle, to effectively use a vehicle body space, and to improve the accuracy of an alarm device.

  The invention according to claim 1 is stored in the alarm device for a motorcycle, the steering angle detection means for the steering wheel for steering the front wheel, the storage means for storing the steering angle of the steering wheel after a predetermined ignition operation, and the storage means. And an alarm generating means for generating an alarm by detecting that the rudder angle has changed in a predetermined manner.

  As an operation, an alarm device is configured by using the steering angle detection means provided in the motorcycle, and an alarm is issued when the steering wheel is operated and a steering angle change is detected.

Since the existing vehicle body equipment is used as the alarm device, the cost increase is suppressed, and it is not necessary to secure an occupied space for the alarm device.
Since the steering angle detection means can detect the steering angle of the steering wheel with high accuracy, it is possible to cope with a slight change in the steering angle.

  In the invention according to claim 2, the predetermined ignition operation is to turn the ignition switch from ON to OFF, and the ignition switch is turned ON to OFF, then sequentially turned OFF to ON, and sequentially turned from ON to OFF. The ignition operation is canceled.

  As an operation, for example, when the engine of a motorcycle is stopped to leave the motorcycle, if the ignition switch is turned from ON to OFF, a predetermined ignition operation is performed, and the steering angle of the steering wheel at that time is stored in the storage means. And a standby state is detected in which a change in the steering angle is detected.

  For example, when the motorcycle engine is stopped and the motorcycle is pushed to move, the ignition switch is turned from ON to OFF, and then sequentially turned from OFF to ON, and then from ON to OFF, a predetermined ignition operation is released. . Accordingly, the steering angle of the steering wheel is not stored, and no alarm is issued even if the steering angle of the steering wheel changes.

  In the invention according to claim 3, the storage means stores the first storage means for storing the steering angle detected at the time of activation, and the steering angle after a predetermined time has elapsed since the steering angle is stored by the first storage means. And a second storage means for comparing the steering angles stored by the first storage means and the second storage means, and determining that the change is abnormal when these steering angle changes exceed a predetermined value. And an alarm generation means for issuing an alarm when the abnormality determination means determines that an abnormality has occurred.

  As an operation, the storage means is composed of the first storage means and the second storage means, the respective steering angles stored by the first storage means and the second storage means are compared, and an abnormality is detected only by the change of the steering angle. It becomes possible to easily discriminate.

  The invention according to claim 4 includes third storage means for storing the steering angle after a predetermined time has elapsed since the steering angle is stored by the second storage means, and the abnormality determination means has the first memory as the first stage. The steering angles stored in the first storage means and the second storage means, respectively, and when the change in the steering angle exceeds a predetermined value, a first alarm is issued. As a second step, the second storage means and the third storage means The steering angles stored in the above are compared, a second alarm is issued when the change in the steering angle exceeds a predetermined value, and the degree is different between the first alarm and the second alarm. To do.

  As an action, a first alarm is issued when an abnormality is detected in the first stage, a second alarm is issued when an abnormality is detected in the second stage, and the first alarm and the second alarm are 2 The effect as an alarm device is enhanced by increasing the degree of alarm.

  Also, if the alarm is not divided into the first alarm and the second alarm, for example, if the steering angle changes despite the fact that the vehicle is not abnormal, the alarm will continue to sound and power consumption will increase. By issuing the warning in the first stage and the second stage, it becomes possible to limit the warning due to the erroneous detection of the vehicle abnormality as described above to only one stage, thereby reducing the power consumption.

  In the invention according to claim 5, when the abnormality determination means compares the steering angles of the second storage means and the third storage means, these steering angle changes continue beyond a predetermined time and are below a predetermined value. In this case, the steering angles stored in the first storage means and the second storage means are deleted, and the process returns to the first stage.

  As an operation, when the change in the steering angle between the second storage means and the third storage means continues beyond a predetermined time and is not more than a predetermined value, it is estimated that the vehicle abnormality has been resolved, and again from the first stage. Perform normal monitoring.

  In the invention according to claim 1, the steering angle detection means for the steering wheel for steering the front wheels, the storage means for storing the steering angle of the steering wheel after a predetermined ignition operation, and the steering angle stored by the storage means change a predetermined amount. And an alarm generation means for detecting the occurrence of an alarm and using the existing rudder angle detection means as an alarm device can reduce the cost increase, and a new vehicle body space can be added to a motorcycle as an alarm device. It is not necessary to provide the vehicle body space, and the vehicle body space of the motorcycle can be used effectively.

  In addition, since a slight change in the steering angle of the steering wheel can be detected, the accuracy of the alarm device can be increased, an abnormal situation of the vehicle is hardly overlooked, and the effect as the alarm device can be enhanced.

  In the invention according to claim 2, the predetermined ignition operation is performed by turning the ignition switch from ON to OFF, and then turning the ignition switch from ON to OFF, and successively from OFF to ON, and then from ON to OFF. Since the operation is canceled, it is possible to prevent an alarm from being issued when the motorcycle is pushed and moved with the ignition switch turned off.

  In the invention according to claim 3, the storage means stores the first storage means for storing the steering angle detected at the time of activation, and the steering angle after a predetermined time has elapsed since the steering angle is stored by the first storage means. And a second storage means for comparing the steering angles stored by the first storage means and the second storage means, and determining that the change is abnormal when these steering angle changes exceed a predetermined value. And an alarm generating means for issuing an alarm when an abnormality is determined by the abnormality determining means, so that the steering angle stored by the first storage means and the second storage means is compared and an abnormality is detected only by a change in the steering angle. Can be easily detected. Therefore, it is possible to reduce the number of man-hours for creating a program.

  Further, by setting the steering angle detected at the time of activation of the storage means as the first reference steering angle, there is no problem regardless of the angle of the steering wheel at the time of activation, and the degree of freedom of the steering wheel angle can be increased.

  According to a fourth aspect of the invention, there is provided third storage means for storing the steering angle after a predetermined time has elapsed since the steering angle is detected by the second storage means, and the abnormality determination means is the first memory as the first stage. The steering angles stored in the first storage means and the second storage means, respectively, and when the change in the steering angle exceeds a predetermined value, a first alarm is issued. As a second step, the second storage means and the third storage means The stored steering angles are compared with each other, and when the change in these steering angles exceeds a predetermined value, the second alarm is issued, and the degree of the difference is different between the first alarm and the second alarm. By changing the alarm level, the effect as an alarm device can be enhanced, the length and number of alarms due to erroneous detection of vehicle abnormality can be reduced, and power consumption can be suppressed.

  In the invention according to claim 5, when the abnormality determination means compares the steering angles of the second storage means and the third storage means, these steering angle changes continuously exceed a predetermined time and are below a predetermined value. In this case, the steering angles stored in the first storage means and the second storage means are erased and the process returns to the first stage. If the steering angle hardly changes, vehicle abnormality detection is performed from the first stage. For this reason, the same abnormality detection method can always be implemented for an abnormal situation of the vehicle.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a front perspective view of a motorcycle having a steering angle sensor mounting structure according to the present invention. A motorcycle 10 is provided with a front fork 12 that supports a front wheel 11 at the front of a vehicle body. A bar handle 13 for steering is provided above the front fork 12, and a steering angle sensor (not shown; details will be described later) is provided on the front fork 12.
Further, the motorcycle 10 is provided with an alarm device (not shown; details will be described later) for preventing theft using the steering angle sensor described above.

  In the figure, reference numeral 21 denotes a front fender that covers the upper portion of the front wheel 11, 22 a front cover that covers the periphery of the upper portion of the front fork 12, 23 a screen garnish that is provided continuously to the upper portion of the front cover 22, and 24 a screen. A wind screen provided continuously to the garnish 23, 25 is a headlight, 26 is a winker, 27 is an inner cover disposed behind the front cover 22, 28 is a seat, and 29 is a center cover that covers the lower portion of the seat 28. , 31 is a floor step on which an occupant places his feet, 32 is a floor skirt that covers the lower side of the floor step 31, and 33 is a front provided between the front ends of the left and right floor skirts 32, 32 (only the reference numeral 32 on the front side is shown). It is a lower cover.

  FIG. 2 is a perspective view for explaining the front fork and its surroundings of the motorcycle according to the present invention. The front fork 12 is rotatably attached to a head pipe 42 constituting the front end of the vehicle body frame 41. And a bridge 44 attached to the lower end portion of the steering stem 43 and left and right fork pipes 46, 47 attached to both ends of the bridge 44. An axle is attached to the lower end portions of the fork pipes 46, 47. A front wheel 11 (see FIG. 1) is attached via a steering wheel, and a bar handle 13 is attached to the upper end portion of the steering stem 43.

  A steering angle sensor 48 is provided below the bridge 44. In the meter 51 attached to the front cover 22 (see FIG. 1), the control of the meter 51 and the operation of the blinker 26 (see FIG. 1) are automatically released. An ECU (Electronic Control Unit) 52 is provided for an automatic cancel function.

  A main switch 53 as an ignition switch and a buzzer 54 attached to the head pipe 42 for sounding a whistle are auxiliary parts provided in the motorcycle 10, but are also parts constituting a part of the alarm device. .

  55 and 56 are a pair of left and right main frames extending obliquely downward and rearward from the head pipe 42; 57 and 58 are a pair of left and right down frames extending obliquely downward and backward from the head pipe 42 below the main frames 55 and 56; 61 is a front wheel brake lever, and 62 is a rear wheel brake lever.

  FIG. 3 is a front view of the main part of the motorcycle showing the steering angle sensor mounting structure according to the present invention. The steering angle sensor 48 is provided between the body frame 41 side which is the fixed side and the front fork 12 side which is the movable side. A sensor mounting mechanism 70 for mounting (see FIG. 2) is provided.

  The sensor mounting mechanism 70 is provided on the lower extension of the steering stem 43, and on the vehicle body frame 41 side, the reinforcing plate 71 (a member constituting the vehicle body frame 41) mounted on the left and right down frames 57 and 58. And a support stay 72 attached to the.

  FIG. 4 is a front side view of a motorcycle showing a steering angle sensor mounting structure according to the present invention. The sensor mounting mechanism 70 protrudes downward from the bridge 44 of the front fork 12 and is disposed above the front fender 21. Has been.

  5 is a cross-sectional view taken along line 5-5 in FIG. 4. The sensor mounting mechanism 70 is a support stay 72 attached to the vehicle body frame 41 (see FIG. 2) side and a disk shape supported by the support stay 72. A lower case 74 having a recess 74 a for accommodating the rudder angle sensor 48 inside, a cylindrical upper case 76 supported by the lower case 74, and a shaft receiver attached to the lower part of the bridge 44 by two bolts 77, 77. The member 78 and a shaft 81 made of resin having an upper end attached to the inner side of the shaft receiving member 78 and a lower end connected to the rudder angle sensor 48. Reference numerals 83 to 85 denote O-rings made of an elastic member for preventing rainwater, dust and the like from entering inside.

  The support stay 72, the lower case 74, and the upper case 76 are fixed sides, and the shaft receiving member 78 and the shaft 81 are movable sides that rotate together with the steering stem 43 and the bridge 44.

3, one end of the support stay 72 is attached to the reinforcing plate 71 on the vehicle body frame 41 side with a bolt 91, and the other end is formed in a fork shape to form a slit 72b between the two arm portions 72a and 72a. A harness 92 connected to the rudder angle sensor 48 is passed between the slits 72b. A coupler 93 is provided at the tip of the harness 92. The coupler 93 is disposed in the slit 72b, that is, both sides of the coupler 92 are sandwiched between the arm portions 72a and 72a.
In FIG. 4, the harness 92 extends rearward on the upper surface of the support stay 72, and the harness 92 is clamped to the support stay 72 by a clamp member 94 in the middle of the harness 92.

  Returning to FIG. 5, the lower case 74 includes lower projecting portions 74 b and 74 b inserted into mounting holes 72 c and 72 c provided in the arm portions 72 a and 72 a of the support stay 72, and a flange 76 a formed in the upper case 76. A circular concave portion 74c to be stored and an annular groove 74d formed on the bottom surface of the circular concave portion 74c so as to be fitted to an annular protrusion 76b formed in the upper case 76 are provided. Note that 74 g is the bottom surface of the lower case 74.

  The upper case 76 includes a cylindrical portion 76c provided so as to surround the shaft 81, and a flange 76a formed integrally with the lower end of the cylindrical portion 76c and larger than the outer diameter of the cylindrical portion 76c. The bottom wall hole 76e formed in the bottom wall 76d of the cylindrical portion 76c is fitted to the shaft 81.

  The bridge 44 is inserted into the through hole 44a into which the steering stem 43 is press-fitted, the boss parts 44b and 44b formed to protrude from the lower surfaces on both sides of the through hole 44a, and the boss parts 44b and 44b for screwing the bolts 77 and 77. It is formed with screws 44c, 44c.

The shaft receiving member 78 includes a bottomed cylindrical upper cylindrical portion 78a, a lower cylindrical portion 78b integrally formed at a lower portion of the upper cylindrical portion 78a with a larger diameter than the upper cylindrical portion 78a, The stays 78c and 78c integrally project left and right from the cylindrical part 78b. The upper cylindrical part 78a and the upper part of the lower cylindrical part 78b are inserted into the hollow part 43a of the steering stem 43. .
The mounting stay portion 78c has a bolt insertion hole 78d, and the bolt 77 is passed through the bolt insertion hole 78d. Reference numeral 95 denotes a washer.

  The shaft 81 is integrally formed with a connecting portion 81a connected to the upper cylindrical portion 78a of the shaft receiving member 78 by a connecting pin 97, and a lower end of the shaft 81 is connected to the rudder angle sensor 48. It consists of a small diameter part 81b.

  The connecting portion 81a is a portion having an outer diameter slightly smaller than the inner diameter of the upper cylindrical portion 78a. The connecting portion 81a includes a flange portion 81c integrally with the lower portion of the connecting portion 81a, and the connecting portion 81a is a bottom wall hole of the upper case 76. An O-ring 83 is disposed in a space between the connecting portion 81a and the cylindrical portion 76c.

The rudder angle sensor 48 includes a sensor fixing portion 101 attached to the bottom surface 74e of the concave portion 74a of the lower case 74, and a sensor movable portion that is rotatably provided on the sensor fixing portion 101 and into which the small diameter portion 81b of the shaft 81 is inserted. 102 and is flattened up and down.
A bottom surface 74 e of the recess 74 a to which the rudder angle sensor 48 is attached is a surface orthogonal to the axis 43 b of the steering stem 43.

  FIG. 6 is a perspective view showing a rudder angle sensor and a harness according to the present invention. The rudder angle sensor 48 is of a potentiometer type, and a sensor fixing portion 101 is provided on a base portion 105 and an upper surface of the base portion 105. The resistor 106 and three terminals 107 to 109 projecting from the side surface of the base 105.

The resistor 106 includes an annular portion 106a and linear portions 106b and 106c integrally formed at both ends of the annular portion 106a.
The sensor movable portion 102 includes a movable main body 111 into which a small diameter portion 81b (see FIG. 5) of a shaft 81 (see FIG. 5) is inserted, and a movable terminal 112 attached to the movable main body 111.

  The movable main body 111 includes a shaft insertion hole 111a into which the small-diameter portion 81b is inserted. The inner surface 111b of the shaft insertion hole 111a includes an arc surface 111c and a flat surface 111d for preventing rotation.

  The movable terminal 112 includes a terminal base 112 a and a sliding piece 112 b that is attached to the terminal base 112 a and slides with the resistor 106, and is electrically connected to the resistor 106.

The couplers 93 of the harness 92 are connected to the terminals 107 to 109.
The terminal 107 is connected to the straight portion 106 b of the resistor 106, the terminal 108 is connected to the movable terminal 112, specifically, the sliding piece 112 b, and the terminal 109 is connected to the straight portion 106 c of the resistor 106. Therefore, when the sliding piece 112b rotates with the rotation of the shaft 81, the electrical resistance between the terminals 107 and 108 or between the terminals 108 and 109 changes.

  As shown by the white arrow, the connection direction for connecting the coupler 93 to the terminals 107 to 109 of the rudder angle sensor 48 is parallel to the bottom surface 74g of the lower case 74 shown in FIG. The mounting height of the steering angle sensor mounting mechanism 70 below the steering stem 43 can be reduced, and the space of the motorcycle can be used effectively.

The operation of the sensor mounting mechanism 70 described above will be described with reference to FIGS.
When the bar handle 13 is rotated, the steering stem 43 and the bridge 44 are rotated accordingly, the movable shaft receiving member 78 and the shaft 81 are rotated, and the small diameter portion 81b of the shaft 81 is turned by the steering angle. The sensor movable part 102 of the sensor 48 is rotated.
As a result, the electric resistance of the rudder angle sensor 48 changes, and this change is converted into the rudder angle of the front wheels by the ECU 52 (see FIG. 7) described later.

  For example, when the steering stem 43 is displaced in the direction perpendicular to the axis (left-right direction in FIG. 5) with respect to the vehicle body frame 41, the bridge 44 and the shaft receiving member 78 are displaced in the direction perpendicular to the axis accordingly. The part 81a is also displaced in the direction perpendicular to the axis.

As a result, since the upper end of the small diameter part 81b is displaced together with the connection part 81a with respect to the lower end of the small diameter part 81b connected to the rudder angle sensor 48 in the lower case 74 on the fixed side, the small diameter part 81b bends. Since the resin-made small-diameter portion 81b has a thin shaft, it easily deforms and easily absorbs the displacement of the steering stem 43 relative to the vehicle body frame 41.
Therefore, it is difficult for a large external force to act on the rudder angle sensor 48 from the shaft 81, and the durability of each component constituting the rudder angle sensor 48 and the rudder angle sensor mounting mechanism 70 can be enhanced.

  Further, the cylindrical portion 76c of the upper case 76 is formed to be long vertically (L1> D, where D is the outer diameter of the cylindrical portion 76c and L1 is the length of the cylindrical portion 76c). An external force that can displace the bottom wall 76d in the direction perpendicular to the axis together with the connecting portion 81a of the shaft 81 with respect to the flange 76a on the lower case 74 side that is the fixed side can be received in a wide area of the upper case 76. Therefore, when the steering stem 43 is displaced, it is possible to prevent the external force from being concentrated locally when the inner surface of the shaft receiving member 78 hits the outer surface of the upper case 76.

  Reference symbol L2 in the drawing is the height of the inner surface of the shaft receiving member 78, which is substantially equal to the length L1. Reference numeral C denotes a gap between the lower cylindrical portion 78b of the shaft receiving member 78 and the cylindrical portion 76c of the upper case 76. By providing the gap C in this way, the gap C and the O-ring 84, which is an elastic member, Thus, the relative displacement between the shaft receiving member 78 and the upper case 76 can be absorbed.

  The upper case 76 forms a space 115 in which the rudder angle sensor 48 is housed together with the lower case 74, thereby functioning as a member for protecting the rain 115 and dust from entering the space 115.

FIG. 7 is a block diagram showing an alarm device according to the present invention. The alarm device 120 includes an ignition switch 53, a rudder angle sensor 48, a side stand switch 121 provided on the side stand, and the motorcycle 10 (see FIG. 1). Various sensors 122 (details will be described later), OFF information JOFF output when the ignition switch 53 is turned OFF, the steering angle signal SA output from the steering angle sensor 48, and the side stand are flipped up. CPU (central processing unit) 123 that receives the flip-up information JH output from the side stand switch 121 and the detection signal SS output from the various sensors 122, and the storage information J1 to J4 output from the CPU 123 (specifically, Is a rudder angle at each time.) And stored stored information J To the first storage unit 131, the second storage unit 132, the third storage unit 133, and the fourth storage unit 134 that output J4 to the CPU 123, and the storage information J1 to J4 output from the CPU 123, Whether the calculation result (specifically, the difference in rudder angle at each time, that is, the rudder angle difference) is abnormal by comparing it with a stored reference value (specifically, a change in reference rudder angle), That is, an abnormality determination unit 136 that determines whether or not the bar handle is operated, in other words, whether or not the theft has been performed, and an abnormality signal that is output when the abnormality determination unit 136 determines that an abnormality has occurred. An alarm device (buzzer) 54 that issues an alarm in response to SAB.
The first storage unit 131, the second storage unit 132, the third storage unit 133, and the fourth storage unit 134 are parts that constitute the storage device 130.

  The CPU 123, the first storage unit 131, the second storage unit 132, the third storage unit 133, the fourth storage unit 134, and the abnormality determination unit 136 are parts constituting the control device 138. The control device 138 includes, for example, The ECU 52 shown in FIG. 2 can perform its function.

As the various sensors 122, for example, in FIG. 2, the handle lock portion impact is detected when a handle lock portion provided between the steering stem 43 side and the vehicle body frame 41 side is squeezed or hit. Detection sensor, ignition switch (main switch) 53, ignition switch foreign matter insertion detection sensor for detecting foreign matter other than a key such as a driver, scissors, etc., wheel speed sensor for detecting the wheel speed of a front wheel or a rear wheel, etc. Can be mentioned.
In addition to the buzzer, the alarm device 54 may be an indicator that emits light.

The operation of the alarm device 120 will be briefly described.
When the ignition switch 53 is turned off to stop the engine, the off information is input from the ignition switch 53 to the CPU 123. As a result, the CPU 123 starts inputting the steering angle signal SA from the steering angle sensor 48 at predetermined time intervals.

In this state, when an abnormal situation occurs in which the motorcycle is moved unintentionally by the owner or the like, and the steering angle of the bar handle changes, the CPU 123 changes the steering angle after the change and the steering angle before the change. The abnormality determination unit 136 determines whether the comparison value is equal to or less than a predetermined value.
The abnormality determination unit 136 causes the alarm device 54 to issue an alarm when the comparison value exceeds a predetermined value.

There are stages in the process of issuing an alarm. After issuing an alarm in the first stage, the steering angle further changes, and when the comparison value after the change in the steering angle and before the change exceeds the predetermined value again, An alarm is issued as the second stage, and similarly, an alarm is issued as the third stage.
The degree of alarm at each stage (the length of the alarm, the pitch of the alarm, the intensity of the alarm light, etc.) increases each time the stage is advanced, and the action and effect of the alarm device is enhanced.

Further, when the CPU 123 receives the flip-up information JH from the side stand switch 121 and the detection signals SS from the various sensors 122, the CPU 123 compares the information and signals when receiving the information and signals from the ignition switch 53 and the steering angle sensor 48. Then, an abnormality signal indicating that the degree of abnormality is larger is sent to the abnormality determining unit 136 so that a warning with a higher degree is issued from the alarm device 54.
Hereinafter, the operation of the alarm device 120 will be described in detail.

FIG. 8 is a first flowchart showing the flow of operation of the alarm device according to the present invention, and FIG. 9 is a second flowchart showing the flow of operation of the alarm device according to the present invention. Are connected by connectors C1, C2, C3. Note that STXX in the figure indicates a step number.
ST01 ... Turn the ignition switch from ON to OFF. At this time, time t is set to time t0 (zero), and t = t0 = 0 (zero).

Thereby, the control apparatus 138 (refer FIG. 7) starts, and it will be in the standby state which inputs the steering angle signal from the steering angle sensor 48 (refer FIG. 7).
At this time, for example, an indicator provided in the meter is turned on to inform the driver that the vehicle is in a standby state.

  It is also possible to stop the control device 138 and release the standby state by changing the ignition switch from ON to OFF, then OFF to ON, and then ON to OFF. (At this time, the above indicator is turned off.)

ST02 ... The steering angle A0 (zero) detected by the steering angle sensor 10 seconds (= 10 seconds) after the end of the processing of ST01, that is, t = t1 = (t0 + 10) seconds is stored in the first storage unit. .
ST03 ... The steering angle A1 detected by the steering angle sensor at the time point 5 sec after the end of the processing of ST02, that is, after t = t2 = (t1 + 5) sec, is stored in the second storage unit.

ST04 ... It is determined whether the difference between the steering angle A1 and the steering angle A0 is smaller than or equal to the reference steering angle change AC1.
If (A1-A0) ≦ AC1 (YES), proceed to ST05.
If (A1-A0) ≦ AC1 is not satisfied (NO), the process proceeds to ST06.
The above ST02 to ST04 are the normal monitoring stage which is the first stage.

ST05 ... The steering angles A0, A1 are deleted, and the process proceeds to ST02.
ST06 An alarm is issued for 0.5 sec.
ST07 ... The steering angle A2 detected by the steering angle sensor at a time point 2.5 seconds after the end of the process of ST03, that is, 2 seconds after the end of the process of ST06, is stored in the third storage unit.

ST08 ... It is determined whether the difference between the steering angle A2 and the steering angle A1 is smaller than or equal to the reference steering angle change AC2.
If (A2-A1) ≦ AC2 (YES), proceed to ST09.
If (A2-A1) ≦ AC2 is not satisfied (NO), the process proceeds to ST13 via the connector C1.
The above ST07 to ST08 are the abnormality detection stage which is the second stage.

ST09 ... The rudder angle A2 is deleted.
ST10 ... The initial value of the counter number V is set to 0 (ie, V = 0). Substitute V + 1 for V.
ST11 ... It is determined whether the counter number V is less than or equal to 10.
If V ≦ 10 (YES), the process proceeds to ST07.
If V ≦ 10 is not satisfied (NO), the process proceeds to ST12.

ST12... 0 (zero) is substituted for V, the steering angles A0 and A1 are deleted, and the process proceeds to ST02.
By providing a counter as in ST10 above, it is possible to maintain the second stage state, which has a higher degree of alarm than the first stage, for a predetermined period of time and keep the alert state longer.

ST13 ... An alarm is issued for 1 sec. The alarm time 1 sec at this time is longer than the alarm time 0.5 sec in ST06.
ST14 ... The steering angle A3 detected by the steering angle sensor at a time point 0.5 sec after the end of the processing of ST13 is stored in the fourth storage unit.

ST15 ... It is determined whether the difference between the steering angle A3 and the steering angle A2 is smaller than or equal to the reference steering angle change AC3.
If (A3-A2) ≦ AC3 (YES), proceed to ST16.
If (A3-A2) ≦ AC3 is not satisfied (NO), the process proceeds to ST20.

ST16 ... The steering angle A3 is deleted.
ST17 ... The initial value of the counter number W is set to 0 (that is, W = 0). Substitute W + 1 for W.
ST18 ... It is determined whether the counter number W is less than or equal to 10.
If W ≦ 10 (YES), the process proceeds to ST14.
If W ≦ 10 is not satisfied (NO), the process proceeds to ST19.

ST19 ... 0 (zero) is substituted for V, 0 (zero) is substituted for W, the steering angles A0, A1, A2 are deleted, and the process proceeds to ST02 via the connector C2.
ST20 ... A3 is substituted for A2, and the steering angle A3 is deleted.
ST21 ... The initial value of the counter number X is set to 0 (that is, X = 0). Substitute X + 1 for X.

ST22 ... It is judged whether the counter number X is smaller than or equal to three.
If X ≦ 3 (YES), the process proceeds to ST14.
If X ≦ 3 is not satisfied (NO), the process proceeds to ST23.
The above ST14 to ST15 and ST20 to ST22 are the third stage of vehicle abnormality determination. By providing the third stage in this way, it is possible to reliably identify an abnormality in the vehicle.

When the process proceeds to ST14 when X ≦ 3 in ST22, a new steering angle A3 is stored in the fourth storage unit 0.5 sec after the process in ST14. In ST15, whether the difference between the new steering angle A3 and the steering angle A2 (the steering angle A3 used in the previous processing in ST14) is smaller than or equal to the reference steering angle change AC3. to decide.
As described above, in the third stage, it is continuously determined whether or not a new steering angle change occurs for each counter number X.

In the third stage (maximum warning state), it is determined that there is a high possibility that an abnormal situation has occurred with respect to the vehicle when the abnormality in the steering angle change is continuously detected, and the longest warning in ST23 (15-second warning) To emit.
When the number of counters in ST22 reaches X = 4, it is possible to notify that an abnormal situation has occurred around the vehicle earlier by issuing an alarm immediately.

ST23 ... An alarm is issued for 15 seconds. The alarm time 15 sec at this time is longer than the alarm time 1 sec in ST13.
ST24 ... The initial value of the counter number Y is set to 0 (ie, Y = 0). Substitute Y + 1 for Y.
ST25 ... It is determined whether the counter number Y is less than or equal to 12.
If Y ≦ 12 (YES), the process proceeds to ST14.
If Y ≦ 12 is not satisfied (NO), the process proceeds to ST26 and proceeds to ST02 via the connector 3.

ST26... 0 (zero) is substituted for V, W, X, and Y, respectively, and the steering angles A0, A1, A2, and A3 are deleted.

When the ignition switch is turned from OFF to ON during the above flow, the processing of the operation flow in the alarm device is terminated.
Further, in the above alarm device, the structure of the handle lock portion is composed of a hole portion provided on one of the vehicle body frame side and the steering stem side, and a shaft provided on the other side so as to be freely inserted into and removed from this hole portion. Even if the handle is locked by inserting the shaft into the hole, the steering angle change due to the gap between the hole and the shaft can be detected by the rudder angle sensor. Regardless of the implementation, the abnormal situation of the vehicle can be detected by the steering angle sensor.

  As shown in FIGS. 2 and 7 to 9 described above, the present invention firstly relates to the steering angle detection means of the bar handle 13 for steering the front wheel 11 (see FIG. 1) in the alarm device 120 of the motorcycle 10. As a steering angle sensor 48, a storage device 130 as storage means for storing the steering angle of the bar handle 13 after a predetermined ignition operation, and a reference steering angle as a predetermined change in the steering angle stored by the storage device 130 Since an alarm device 54 is provided as an alarm generating means for detecting that the change AC1, AC2, AC3 has been performed and issuing an alarm, the use of the existing rudder angle sensor 48 as the alarm device 120 can suppress an increase in cost. In addition, it is not necessary to provide a new vehicle body space in the motorcycle 10 as the alarm device 120, and the vehicle body space of the motorcycle 10 is effectively used. It is possible.

  In addition, since a slight change in the steering angle of the bar handle 13 can be detected, the accuracy of the alarm device 120 can be improved, an abnormal situation of the vehicle is hardly overlooked, and the effect as the alarm device 120 can be enhanced. .

  Secondly, according to the present invention, as shown in FIGS. 2 and 7 to 9, a predetermined ignition operation is performed by turning off the main switch 53 as an ignition switch from ON to turning off the main switch 53. Since the predetermined ignition operation is released by turning OFF, then sequentially from OFF to ON, and from ON to OFF, no alarm is issued when the motorcycle 10 is pushed and moved with the main switch 53 turned OFF. Can be.

  Thirdly, according to the present invention, as shown in FIGS. 7 to 9, the storage device 130 stores first steering means (first storage unit 131) that stores the steering angle A <b> 0 detected at startup, and the first storage unit 130. The storage means includes second storage means (second storage unit 132) for storing the steering angle A1 after a predetermined time (for example, 5 seconds) has elapsed since the steering angle A0 is stored, and the first storage means and the first storage means (2) An abnormality determination means (abnormality) for comparing the steering angles A0 and A1 stored in the storage means and determining that the steering angle change (A1-A0) exceeds the reference steering angle change AC1 as a predetermined value. Since the determination unit 136) and the alarm generation unit (alarm device 54) that issues an alarm when an abnormality is detected by the abnormality determination unit, the rudder angle A0, stored by the first storage unit and the second storage unit is provided. Compared to A1, only change in rudder angle (A1-A0) Abnormality can be easily detected. Therefore, it is possible to reduce the number of man-hours for creating a program.

  Further, by setting the rudder angle detected at the time of activation of the storage device 130 as the first reference rudder angle, there is no problem regardless of the angle of the bar handle 13 at the time of activation (see FIG. 2). The degree of freedom can be increased.

  Fourthly, in the present invention, third storage means for storing the steering angle A2 after a predetermined time (for example, 2.5 seconds) has elapsed since the steering angle A1 is stored by the second storage means (second storage unit 132). The steering angle A0 is stored in the first storage unit (first storage unit 131) and the second storage unit as the first stage. , A1 are compared, and when these rudder angle changes (A1-A0) exceed the reference rudder angle change AC1 as a predetermined value, a first alarm is issued, and as a second stage, the second storage means and the third memory The steering angles A1 and A2 respectively stored by the means are compared, and when these steering angle changes (A2-A1) exceed the reference steering angle change AC2 as a predetermined value, a second alarm is issued. Since the degree of warning differs from that of the second warning, By changing the function, the effect as an alarm device can be enhanced, and an alarm can be prevented from being issued more than necessary time or number of times, that is, the occurrence of an alarm due to erroneous detection of vehicle abnormality can be reduced. , Can reduce power consumption.

  According to the fifth aspect of the present invention, the abnormality determination means (abnormality determination unit 136) determines the steering angles A1 and A2 between the second storage means (second storage part 132) and the third storage means (third storage part 133). When the comparison is made, these steering angle changes (A2-A1) continue beyond a predetermined time (for example, a time corresponding to V = 10 when the counter number is V), and the reference steering angle change AC2 or less as a predetermined value. In this case, the steering angles A0 and A1 stored in the first storage means and the second storage means are erased and the process returns to the first stage. By performing normal monitoring for abnormality detection, the same abnormality detection method can always be implemented for abnormal vehicle situations.

  FIG. 10 is a time chart showing the operation of the alarm device according to the present invention, and shows the main operation of the alarm device that issues an alarm by detecting the steering angle of the bar handle with the steering angle sensor at each stage. The vertical axis represents the bar handle rudder angle, and the horizontal axis represents time T (unit: sec) based on when the ignition switch is turned from ON to OFF.

The steering angle A0 (zero) is detected 10 seconds after the ignition switch is turned from ON to OFF (time T = t1 = 10 seconds) and stored in the first storage unit.
The steering angle A1 at time T = t2 = 15 sec is detected and stored in the second storage unit. Then, the steering angle change (A1-A0) is calculated and compared with the reference steering angle change. This is the first stage.

If it is determined that the rudder angle change (A1-A0) is larger than the reference rudder angle change, the first alarm is immediately issued for 0.5 sec.
The steering angle A2 at time T = t3 = 17.5 sec is detected and stored in the third storage unit. Then, the steering angle change (A2-A1) is calculated and compared with the reference steering angle change. This is the second stage.
If it is determined that the rudder angle change (A2-A1) is larger than the reference rudder angle change, the second alarm is immediately issued for 1 sec.

The steering angle A3 at time T = t4 = 19 sec is detected and stored in the fourth storage unit. Then, the steering angle change (A3-A2) is calculated and compared with the reference steering angle change.
When it is determined that the rudder angle change (A3-A2) is larger than the reference rudder angle change, the rudder angle A3 is deleted while performing the process of setting the rudder angle A3 to the rudder angle A21.

  Then, a new steering angle A31 is detected at T = t5 = 19.5 sec after 0.5 sec and stored in the fourth storage unit. Then, the steering angle change (A31-A21) is calculated and compared with the reference steering angle change.

  Again, when it is determined that the steering angle change (A31-A21) is larger than the reference steering angle change, the same processing as described above is continuously performed at time T = t6 and time T = t7, and T = t7 = 20. When it is determined that the steering angle change (A33-A23) at 5 seconds is larger than the reference steering angle change (the above is the third stage), the third alarm is immediately issued for 15 seconds.

  By continuously determining the steering angle change in the third stage, it is possible to accurately determine whether or not there is a high possibility of an abnormal vehicle situation, and further, the steering angle change exceeding a predetermined value continues. When it is determined that there is a high possibility of an abnormal situation of the vehicle, a third alarm having a high degree of comparison with the first alarm and the second alarm, that is, a long alarm such as a time of 15 seconds, It is possible to reliably notify the surroundings of the motorcycle that an abnormal situation of the vehicle has occurred, and to promptly terminate the abnormal situation.

  The alarm device of the present invention is suitable for a motorcycle.

1 is a front perspective view of a motorcycle including a steering angle sensor mounting structure according to the present invention. 1 is a perspective view illustrating a front fork and its surroundings of a motorcycle according to the present invention. 1 is a front view of a main part of a motorcycle showing a steering angle sensor mounting structure according to the present invention. 1 is a front side view of a motorcycle showing a steering angle sensor mounting structure according to the present invention. FIG. 5 is a sectional view taken along line 5-5 of FIG. It is a perspective view showing a rudder angle sensor and a harness according to the present invention. It is a block diagram which shows the alarm device which concerns on this invention. It is a 1st flowchart which shows the flow of an action | operation of the alarm device which concerns on this invention. It is a 2nd flowchart which shows the flow of an action | operation of the alarm device which concerns on this invention. It is a time chart which shows the action | operation of the alarm device which concerns on this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Motorcycle, 11 ... Front wheel, 13 ... Bar handle, 48 ... Steering angle detection means (steering angle sensor), 53 ... Ignition switch (main switch), 54 ... Alarm generating means (alarm device (buzzer)), 120 ... Alarm device, 130 ... storage means (storage device), 131 ... first storage means (first storage section), 132 ... second storage means (second storage section), 133 ... third storage means (third storage section) DESCRIPTION OF SYMBOLS 136 ... Abnormality determination means (abnormality determination part), 138 ... Control apparatus, A0, A1, A2 ... Steering angle, AC1, AC2 ... Predetermined change and predetermined value (reference rudder angle change).

Claims (5)

In the alarm device for motorcycles,
Steering angle detection means for steering the front wheel, storage means for storing the steering angle of the steering wheel after a predetermined ignition operation, and detecting that the steering angle stored by the storage means has changed a predetermined amount An alarm device for a motorcycle, comprising: an alarm generating means for generating a warning.   The predetermined ignition operation is to turn the ignition switch from ON to OFF. By turning the ignition switch from ON to OFF, and then sequentially from OFF to ON and from ON to OFF, the predetermined ignition operation is released. The motorcycle alarm device according to claim 1.   The storage means includes a first storage means for storing the steering angle detected at the time of activation, and a second storage means for storing the steering angle after a predetermined time has elapsed since the steering angle was stored by the first storage means. Comparing the steering angles stored in the first storage means and the second storage means, the abnormality determination means for determining an abnormality when the change in the steering angle exceeds a predetermined value, and the abnormality determination means The alarm device for a motorcycle according to claim 1 or 2, further comprising the alarm generation means for generating an alarm when it is determined that there is an abnormality. Third storage means for storing the steering angle after a predetermined time has elapsed since the steering angle is stored by the second storage means;
As the first step, the abnormality determination means compares the steering angles stored by the first storage means and the second storage means, respectively, and issues a first alarm when these steering angle changes exceed a predetermined value. Emanating,
As a second stage, the steering angles stored by the second storage means and the third storage means are compared, respectively, and when these steering angle changes exceed a predetermined value, a second alarm is issued,
The motorcycle warning device according to claim 3, wherein the first warning and the second warning are different in degree.   When the abnormality determination unit compares the steering angles of the second storage unit and the third storage unit and the change in the steering angle continues beyond a predetermined time and is below a predetermined value, The motorcycle warning device according to claim 4, wherein the steering angles stored in the first storage means and the second storage means are deleted, and the process returns to the first stage.

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