WO2020217421A1 - Dispositif de réglage d'axe optique et procédé de réglage d'axe optique - Google Patents

Dispositif de réglage d'axe optique et procédé de réglage d'axe optique Download PDF

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Publication number
WO2020217421A1
WO2020217421A1 PCT/JP2019/017762 JP2019017762W WO2020217421A1 WO 2020217421 A1 WO2020217421 A1 WO 2020217421A1 JP 2019017762 W JP2019017762 W JP 2019017762W WO 2020217421 A1 WO2020217421 A1 WO 2020217421A1
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WIPO (PCT)
Prior art keywords
output value
unit
acceleration sensor
optical axis
angle
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PCT/JP2019/017762
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English (en)
Japanese (ja)
Inventor
貴夫 福永
亘 辻田
努 朝比奈
律也 大嶋
勝重 諏訪
Original Assignee
三菱電機株式会社
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2019/017762 priority Critical patent/WO2020217421A1/fr
Priority to JP2021515060A priority patent/JP6914472B2/ja
Publication of WO2020217421A1 publication Critical patent/WO2020217421A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/02—Testing optical properties
    • G01M11/06—Testing the alignment of vehicle headlight devices

Definitions

  • the present invention relates to an optical axis adjusting device and an optical axis adjusting method.
  • the angle of the optical axis of the headlight of the vehicle must satisfy the legal angle stipulated by laws and regulations.
  • the statutory angle in Japan is the "Detailed Notification Attachment" of "Article 32 of the Safety Standards for Road Transport Vehicles” set by the Ministry of Land, Infrastructure, Transport and Tourism. 52 Technical Standards for Mounting Devices for Lights, Reflectors and Indicators 4.2 "Passing Headlights".
  • a person who manufactures, maintains, or repairs a vehicle needs to adjust the angle of the optical axis before shipping the vehicle so as to satisfy the legal angle with the headlight fixed to the vehicle.
  • Non-Patent Document 1 describes a method of irradiating a screen, a wall, or the like with a headlight to check whether or not the angle of the optical axis of the headlight of a vehicle satisfies a legal angle. ..
  • the present invention is for solving the above-mentioned problems, and an object of the present invention is to provide an optical axis adjusting device that automatically adjusts the angle of the optical axis of the headlight.
  • the optical axis adjusting device of the present invention is provided on a vehicle by rotating a driven portion that can rotate in the pitch direction with respect to the vehicle to adjust the rotation angle of the driven portion when inspecting the vehicle.
  • An optical axis adjusting device that adjusts the angle of the optical axis of the headlight to a legal angle.
  • the first acceleration sensor mounted on the driven unit and the rotation of the driven unit in an arbitrary state of the driven unit. With reference to the moving angle, the output value output from the first acceleration sensor in each of a plurality of states of the driven unit having different rotation angles of the driven unit is associated with the rotation angle corresponding to the output value.
  • the rotation angle that maximizes the value in the gravity direction in the output value indicated by the output value information is specified as the maximum angle and specified. It is provided with an adjusting unit that adjusts the angle of the optical axis of the headlight to a legal angle based on the maximum angle.
  • the angle of the optical axis of the headlight can be automatically adjusted.
  • FIG. 1 is a block diagram showing an example of a configuration of a main part of an optical axis adjustment system to which the optical axis adjustment device according to the first embodiment is applied.
  • FIG. 2 is a block diagram showing an example of the configuration of a main part of a direct projection type headlight.
  • FIG. 3 is a block diagram showing an example of the arrangement of the first acceleration sensor according to the first embodiment.
  • FIG. 4 is a graph showing an example of the relationship between the value of the output value output from the first acceleration sensor in the gravity direction and the rotation angle corresponding to the output value.
  • FIG. 5 is a block diagram showing an example of the configuration of the main part of the optical axis adjusting ECU according to the first embodiment.
  • FIG. 1 is a block diagram showing an example of a configuration of a main part of an optical axis adjustment system to which the optical axis adjustment device according to the first embodiment is applied.
  • FIG. 2 is a block diagram showing an example of the configuration of a main part of a direct projection
  • FIG. 6 is a block diagram showing an example of the configuration of a main part of the optical axis adjustment system to which the optical axis adjustment device according to the second embodiment is applied.
  • FIG. 7 is a graph showing the relationship between the value of the output value output from the first acceleration sensor in the gravity direction and the rotation angle corresponding to the output value.
  • FIG. 8 is a block diagram showing an example of the configuration of a main part of the optical axis adjustment system to which the optical axis adjustment device according to the third embodiment is applied.
  • FIG. 9 is a diagram showing an example of the relationship between the fluctuation range of the output value output by the first acceleration sensor at a predetermined frequency in the gravity direction and the rotation angle determined by the generation unit.
  • FIG. 10 is a block diagram showing an example of the configuration of a main part of the optical axis adjustment system to which the optical axis adjustment device according to the fourth embodiment is applied.
  • FIG. 11 is a block diagram showing an example of the arrangement of the first acceleration sensor and the second acceleration sensor according to the fourth embodiment.
  • FIG. 12A is a graph showing an example of the relationship between the value of the output value output from the first acceleration sensor in the gravity direction and the rotation angle corresponding to the output value.
  • FIG. 12B is a graph showing an example of the relationship between the value of the output value output from the second acceleration sensor in the gravity direction and the rotation angle corresponding to the output value.
  • Embodiment 1 The optical axis adjusting device 10 of the first embodiment will be described with reference to FIGS. 1 to 5.
  • the optical axis adjustment shall be performed by stopping the vehicle 1 on a plane orthogonal to the direction of gravity (hereinafter referred to as "horizontal plane").
  • the unit of angle shall be degrees.
  • the elevation angle of the vehicle 1 in the pitch direction is positive and the depression angle is negative with respect to the horizontal plane (that is, 0 degree).
  • FIG. 1 is a block diagram showing an example of the configuration of a main part of the optical axis adjustment system 200 to which the optical axis adjustment device 10 according to the first embodiment is applied.
  • the headlight 20 is provided on the vehicle body of the vehicle 1.
  • the mounting posture of the headlight 20 differs for each individual vehicle 1 due to mounting tolerances when the headlight 20 is mounted on the vehicle 1. Therefore, the optical axis of the headlight 20 needs to be adjusted so as to satisfy the legal angle after the headlight 20 is attached to the vehicle 1.
  • the vehicle 1 has a drive mechanism 30 for the headlight 20.
  • the drive mechanism 30 is composed of, for example, an actuator.
  • the drive mechanism 30 rotates the driven unit 22 in the headlight 20 in the pitch direction under the control of a drive control device 40 configured by an ECU (Electronic Control Unit) or the like.
  • the angle of the optical axis of the headlight 20 in the pitch direction with respect to the vehicle body portion of the vehicle 1 (hereinafter referred to as “the angle with respect to the vehicle body optical axis”) changes.
  • the headlight 20 is composed of, for example, a so-called "direct projection type” headlight 20 (see FIG. 2).
  • the structure of the direct projection type headlight 20 is described in, for example, Reference 1 below.
  • a front lens (not shown) is provided in the front opening (not shown) of the housing 21. Further, a light source (not shown), a condenser lens (not shown), and a projection lens 23 are provided inside the housing 21.
  • the light source is composed of, for example, an LED (Light Emitting Diode).
  • the projection lens 23 has a portion that forms a cut-off line in the light distribution pattern of the headlight 20, that is, a cut-off line forming portion (not shown).
  • the driven unit 22 includes the light source, the condensing lens, the projection lens 23, and the like.
  • the optical axis adjustment device 10 includes a first acceleration sensor 11, a first acquisition unit 12, a control unit 13, a generation unit 14, an adjustment unit 15, and a reception unit 16.
  • the first acquisition unit 12, the control unit 13, the generation unit 14, the adjustment unit 15, and the reception unit 16 included in the optical axis adjusting device 10 are a processor 101 and a memory 102, or a processing circuit (not shown).
  • it is composed of an optical axis adjusting ECU 100. That is, the optical axis adjusting device 10 includes a first acceleration sensor 11, an optical axis adjusting ECU 100, and the like.
  • the first acceleration sensor 11 is mounted on the driven unit 22. Specifically, for example, as shown in FIG. 3, the first acceleration sensor 11 is mounted on the projection lens 23 of the headlight 20 included in the driven unit 22. In the following description, the first acceleration sensor 11 is mounted on the driven unit 22 so that the optical axis of the projection lens 23 and the direction of acceleration detected by the first acceleration sensor 11 are orthogonal to each other in the pitch direction. Explain as if it were.
  • the first acquisition unit 12 acquires the output value output by the first acceleration sensor 11. Specifically, for example, the first acquisition unit 12 receives the output signal output by the first acceleration sensor 11 and acquires the output value indicated by the output signal.
  • the control unit 13 rotates the driven unit 22 so that the rotation angle of the driven unit 22 becomes a desired rotation angle. Specifically, for example, the control unit 13 specifies to the drive control device 40 a desired rotation angle of the driven unit 22 based on the rotation angle of the driven unit 22 in an arbitrary state of the driven unit 22. To do.
  • the drive control device 40 controls the drive mechanism 30 based on the rotation angle specified by the control unit 13, and rotates the driven unit 22 so that the rotation angle of the driven unit 22 becomes the specified rotation angle. Move it.
  • the generation unit 14 is the first in each of a plurality of states of the driven unit 22 in which the rotation angle of the driven unit 22 is different from the rotation angle of the driven unit 22 in an arbitrary state of the driven unit 22. Output value information in which the output value output from the acceleration sensor 11 and the rotation angle corresponding to the output value are associated with each other is generated.
  • the generation unit 14 uses the rotation angle of the driven unit 22 in an arbitrary state of the driven unit 22 as a reference for causing the first acquisition unit 12 to acquire the output value as the first step.
  • the rotation angle of the driven unit 22 is determined.
  • the generation unit 14 designates the determined rotation angle of the driven unit 22 to the control unit 13 so that the rotation angle of the driven unit 22 becomes the rotation angle. Let the control unit 13 control the drive control device 40.
  • the generation unit 14 causes the first acquisition unit 12 to acquire the output value output by the first acceleration sensor 11.
  • the generation unit 14 associates the output value acquired by the first acquisition unit 12 with the rotation angle of the driven unit 22 designated by the control unit 13.
  • the generation unit 14 starts from the first acceleration sensor 11 in each of a plurality of states of the driven unit 22 having different rotation angles of the driven unit 22. Output value information in which the output output value is associated with the rotation angle corresponding to the output value is generated.
  • FIG. 4 is a graph showing an example of the relationship between the value of the output value output from the first acceleration sensor 11 in the gravity direction and the rotation angle corresponding to the output value.
  • the horizontal axis is the rotation angle
  • the vertical axis is the value in the gravity direction of the output value output from the first acceleration sensor 11.
  • ⁇ indicates an actually measured value of the output value output from the first acceleration sensor 11 in the gravity direction.
  • the adjusting unit 15 Based on the output value information generated by the generation unit 14, the adjusting unit 15 specifies the rotation angle at which the value in the gravity direction at the output value indicated by the output value information is maximum as the maximum angle.
  • the adjusting unit 15 adjusts the angle of the optical axis of the headlight 20 to a legal angle with reference to the specified maximum angle. Specifically, for example, the adjusting unit 15 specifies the rotation angle at which the value in the gravity direction of the output value is the maximum among the plurality of rotation angles indicated by the output value information generated by the generating unit 14 as the maximum angle. To do.
  • the direction of gravity is In a state where the posture of the driven unit 22 is maintained at the rotation angle that maximizes the value, the angle of the optical axis of the headlight 20 with respect to the vehicle body is 0 degrees.
  • the adjusting unit 15 adjusts the rotation angle of the driven unit 22 so that the rotation angle is smaller by a predetermined angle satisfying a legal angle such as 1 degree from the specified maximum angle. By adjusting in this way, the optical axis angle with respect to the vehicle body becomes smaller by a predetermined angle such as -1 degree with respect to 0 degree.
  • the optical axis adjusting device 10 may include a reception unit 16.
  • the reception unit 16 receives operation information indicating the start of adjustment of the optical axis via an operation input device (not shown) such as a push button switch.
  • the optical axis adjusting device 10 starts the optical axis adjustment, for example, by using the operation information received by the receiving unit 16 as a trigger.
  • the optical axis adjusting device 10 rotates the driven portion 22 that can rotate in the pitch direction with respect to the vehicle 1 at the time of inspection of the vehicle 1, and the driven portion 22
  • a first optical axis adjusting device 10 that adjusts the angle of the optical axis of the headlight 20 provided in the vehicle 1 to a legal angle by adjusting the rotation angle, and is mounted on the driven unit 22.
  • An output value based on a generation unit 14 that generates output value information in which the output value output from the acceleration sensor 11 and a rotation angle corresponding to the output value are associated with each other, and an output value information generated by the generation unit 14.
  • the adjustment unit 15 specifies the rotation angle that maximizes the value in the gravity direction in the output value indicated by the information as the maximum angle, and adjusts the angle of the optical axis of the headlight 20 to a legal angle based on the specified maximum angle. And equipped with.
  • the angle of the optical axis of the headlight 20 can be automatically adjusted. Further, with this configuration, it is not necessary to turn on the headlight 20 and irradiate the screen with the light of the headlight 20 at the time of inspection of the vehicle 1. Therefore, it is not necessary to prepare equipment such as a screen and a dark room. Further, when the headlight 20 is turned on during the inspection of the vehicle 1 to irradiate the screen with the light of the headlight 20, it is necessary to accurately measure the distance between the headlight 20 and the screen. There is no need to perform such troublesome work.
  • the inspection space is sufficiently large because the measurement is performed with the headlight 20 and the screen separated. It was necessary, but it is not necessary to secure such a large inspection space.
  • the first acceleration sensor 11 is mounted on the driven unit 22 so that the optical axis of the projection lens 23 and the direction of acceleration detected by the first acceleration sensor 11 are orthogonal to each other in the pitch direction.
  • the angle in the pitch direction between the optical axis of the projection lens 23 and the direction of acceleration detected by the first acceleration sensor 11 is a known angle, it is not always necessary that the angles are orthogonal to each other. Absent. Even when the angle in the pitch direction between the optical axis of the projection lens 23 and the direction of acceleration detected by the first acceleration sensor 11 is not orthogonal, the adjusting unit 15 takes the known angle into consideration. It is possible to adjust the angle of the optical axis with respect to the vehicle body so as to satisfy the legal angle.
  • FIG. 6 is a block diagram showing an example of the configuration of a main part of the optical axis adjustment system 200a to which the optical axis adjustment device 10a according to the second embodiment is applied.
  • the adjusting unit 15 of the optical axis adjusting device 10 according to the first embodiment is changed to the adjusting unit 15a.
  • the same blocks as those shown in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted.
  • the optical axis adjustment device 10a includes a first acceleration sensor 11, a first acquisition unit 12, a control unit 13, a generation unit 14, an adjustment unit 15a, and a reception unit 16.
  • the first acceleration sensor 11, the first acquisition unit 12, the control unit 13, the generation unit 14, the adjustment unit 15a, and the reception unit 16 included in the optical axis adjustment device 10a are, for example, the same as the optical axis adjustment ECU 100 shown in FIG. It is realized by the hardware configuration of.
  • the adjusting unit 15 according to the first embodiment specifies as the maximum angle the rotation angle at which the value in the gravity direction of the output value becomes the maximum among the plurality of rotation angles indicated by the output value information generated by the generation unit 14. It was a thing.
  • the adjusting unit 15a according to the second embodiment shows the relationship between the output value output from the first acceleration sensor 11 and the rotation angle corresponding to the output value based on the output value information generated by the generating unit 14.
  • the regression curve is specified, and the rotation angle corresponding to the point where the specified regression curve has the maximum value is specified as the maximum angle.
  • FIG. 7 a specific example of a method in which the adjusting unit 15a according to the second embodiment specifies the maximum angle will be described with reference to FIG. 7.
  • the driven unit 22 is driven so that the optical axis of the projection lens 23 and the direction of acceleration detected by the first acceleration sensor 11 are orthogonal to each other in the pitch direction. It is assumed that it is placed in.
  • FIG. 7 is a graph showing the relationship between the value of the output value output from the first acceleration sensor 11 in the gravity direction and the rotation angle corresponding to the output value.
  • the horizontal axis is the rotation angle
  • the vertical axis is the value in the gravity direction of the output value output from the first acceleration sensor 11.
  • ⁇ indicates an actually measured value of the output value output from the first acceleration sensor 11 in the gravity direction.
  • Equation (1) When ⁇ s is a radian value corresponding to about ⁇ 10 degrees, the equation (1) can be approximated by the following equation (2).
  • Gz ( ⁇ s) Go ⁇ ( 1- ⁇ s 2/2) Equation (2)
  • ⁇ s is expressed in radians.
  • the output value of the first acceleration sensor 11 can be approximated by a regression curve based on a quadratic curve when ⁇ s is a radian value corresponding to about ⁇ 10 degrees.
  • the alternate long and short dash line is an approximation of the measured value of the output value output from the first acceleration sensor 11 in the direction of gravity by a regression curve based on a quadratic curve.
  • the adjusting unit 15a specifies the rotation angle at which the value in the gravity direction in the output value is maximized based on the output value information generated by the generation unit 14, the adjusting unit 15a sets the value in the gravity direction in the output value indicated by the output value information. Based on this, the regression curve based on the quadratic curve is obtained.
  • the adjusting unit 15a specifies the rotation angle corresponding to the point as the maximum angle by specifying the point where the quadratic curve becomes the maximum.
  • the adjusting unit 15a outputs the output value output from the first acceleration sensor 11 based on the output value information generated by the generating unit 14.
  • the regression curve showing the relationship with the rotation angle corresponding to the value is specified, the rotation angle corresponding to the point where the specified regression curve becomes the maximum value is specified as the maximum angle, and the specified maximum angle is used as a reference.
  • the angle of the optical axis of the illuminating lamp 20 is adjusted to a legal angle. With this configuration, the number of times to acquire the output value output from the first acceleration sensor 11 can be reduced. Therefore, the time required for adjusting the optical axis can be shortened.
  • FIG. 8 is a block diagram showing an example of the configuration of a main part of the optical axis adjustment system 200b to which the optical axis adjustment device 10b according to the third embodiment is applied.
  • the adjusting unit 15 and the generating unit 14 of the optical axis adjusting device 10 according to the first embodiment are changed to the adjusting unit 15b and the generating unit 14b.
  • the same blocks as those shown in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted.
  • the optical axis adjustment device 10b includes a first acceleration sensor 11, a first acquisition unit 12, a control unit 13, a generation unit 14b, an adjustment unit 15b, and a reception unit 16.
  • the first acceleration sensor 11, the first acquisition unit 12, the control unit 13, the generation unit 14b, the adjustment unit 15b, and the reception unit 16 included in the optical axis adjustment device 10b are, for example, the same as the optical axis adjustment ECU 100 shown in FIG. It is realized by the hardware configuration of.
  • the adjusting unit 15 according to the first embodiment specifies as the maximum angle the rotation angle at which the value in the gravity direction of the output value becomes the maximum among the plurality of rotation angles indicated by the output value information generated by the generation unit 14. It was a thing.
  • the adjustment unit 15b according to the third embodiment is different from the adjustment unit 15 according to the first embodiment in the method of specifying the maximum angle.
  • the driven unit 22 is driven so that the optical axis of the projection lens 23 and the direction of acceleration detected by the first acceleration sensor 11 are orthogonal to each other in the pitch direction. It is assumed that it is placed in.
  • the generation unit 14b is the first in each of a plurality of states of the driven unit 22 in which the rotation angle of the driven unit 22 is different from the rotation angle of the driven unit 22 in an arbitrary state of the driven unit 22.
  • Output value information in which the output value output from the acceleration sensor 11 and the rotation angle corresponding to the output value are associated with each other is generated.
  • the generation unit 14b uses the rotation angle of the driven unit 22 in an arbitrary state of the driven unit 22 as a reference for causing the first acquisition unit 12 to acquire the output value as the first step.
  • the rotation angle of the driven unit 22 is determined.
  • the generation unit 14b designates the determined rotation angle of the driven unit 22 to the control unit 13 so that the rotation angle of the driven unit 22 becomes the rotation angle. Let the control unit 13 control the drive control device 40.
  • the generation unit 14b controls the driven unit 22 to simply vibrate at a predetermined frequency F using a minute predetermined angle width such as 1 degree around the rotation angle.
  • the unit 13 controls the drive control device 40.
  • the generation unit 14b causes the first acquisition unit 12 to acquire the output value output by the first acceleration sensor 11 as the fourth step.
  • the generation unit 14b acquires the fluctuation range of the output value in the frequency F based on the output value acquired by the first acquisition unit 12, and the driven unit 22 designated by the control unit 13. Corresponds to the rotation angle of.
  • the generation unit 14b starts from the first acceleration sensor 11 in each of a plurality of states of the driven unit 22 having different rotation angles of the driven unit 22.
  • Output value information is generated in which the fluctuation width of the output value at the frequency F and the rotation angle corresponding to the fluctuation width of the output value are associated with each other.
  • the adjusting unit 15b determines the fluctuation range of the output value output from the first acceleration sensor 11 at a predetermined frequency and the rotation angle corresponding to the fluctuation width of the output value based on the output value information generated by the generation unit 14b.
  • the regression curve showing the relationship is specified, and the rotation angle corresponding to the point where the specified regression curve becomes the minimum value is specified as the maximum angle.
  • FIG. 9 shows that when the driven unit 22 is simply vibrated at a predetermined frequency F using a small predetermined angle width such as 1 degree around the rotation angle determined by the generation unit 14b in the first step.
  • a small predetermined angle width such as 1 degree around the rotation angle determined by the generation unit 14b in the first step.
  • FIG. 9 shows an example of the relationship between the fluctuation width of the output value output by the acceleration sensor 11 in the frequency F in the gravity direction, and the rotation angle determined by the generation part 14b.
  • the horizontal axis is the rotation angle
  • the vertical axis is the fluctuation range of the output value output from the first acceleration sensor 11 at the frequency F in the gravity direction.
  • ⁇ indicates an actually measured value of the fluctuation width of the output value in the gravity direction output from the first acceleration sensor 11.
  • Equation (3) By Taylor expanding the equation (3), the equation (3) is approximated as the following equation (4).
  • ⁇ c and ⁇ m are expressed in radians.
  • dGz ( ⁇ c) / d ⁇ c is a value obtained by substituting ⁇ c for ⁇ in the equation obtained by differentiating Gz ( ⁇ (t)) with respect to the rotation angle ⁇ .
  • Gz ( ⁇ c) is a constant determined by the rotation angle that is the center of simple vibration. That is, when the driven unit 22 is simply vibrated at a predetermined frequency F using a minute predetermined angle width ⁇ m such as 1 degree around a certain rotation angle ⁇ c, the output value output by the first acceleration sensor 11
  • the value Gz ( ⁇ (t)) in the direction of gravity of is centered on the constant Gz ( ⁇ c), and the frequency F fluctuates with a fluctuation range of (Gz ( ⁇ c) / d ⁇ c) ⁇ ⁇ m.
  • the fluctuation range of the component that changes with time at the frequency F of Gz ( ⁇ (t)) includes dGz ( ⁇ c) / d ⁇ c, which is the slope of Gz ( ⁇ (t)) at a certain rotation angle ⁇ c.
  • the minimum value in the regression curve of the two two-point chain lines shown in FIG. 9 is the change point at which the slope of the tangent line in the regression curve of the quadratic curve shown by the one-point chain line in FIG. 7 changes from positive to negative. Since the point where the slope of the tangent line in the regression curve is 0 is shown, the rotation angle corresponding to the minimum value is the maximum angle.
  • the generation unit 14b rotates the driven unit 22 with reference to the rotation angle of the driven unit 22 in an arbitrary state of the driven unit 22.
  • the fluctuation width of the output value output from the first acceleration sensor 11 at a predetermined frequency is associated with the rotation angle corresponding to the fluctuation width of the output value.
  • the output value information is generated, and the adjusting unit 15b generates the fluctuation range of the output value output from the first acceleration sensor 11 at a predetermined frequency and the fluctuation width of the output value based on the output value information generated by the generation unit 14b.
  • the regression curve showing the relationship with the rotation angle corresponding to is specified, the rotation angle corresponding to the point where the specified regression curve becomes the minimum value is specified as the maximum angle, and the headlight is specified with the specified maximum angle as a reference.
  • the angle of the optical axis of the lamp 20 was adjusted to a legal angle. With this configuration, the number of times to acquire the output value output from the first acceleration sensor 11 can be reduced. Therefore, the time required for adjusting the optical axis can be shortened.
  • the output value output from the first acceleration sensor 11 may vibrate due to the natural vibration in the measurement environment. Therefore, the first acquisition unit 12 is generally provided with a low-pass filter or the like for reducing the vibration component in the output signal output from the first acceleration sensor 11.
  • the frequency of vibration in a measurement environment such as a factory is often a very small value such as 1 Hz (hertz), and it is necessary to provide a low-pass filter having a cutoff frequency of less than 1 Hz, for example. Further, for example, when a low-pass filter having a cutoff frequency of less than 1 Hz is provided, a long time is required to acquire the output value output from the first acceleration sensor 11.
  • the driven unit 22 By making the driven unit 22 simple vibration using a frequency F other than the frequency of the natural vibration in the measurement environment, it is not necessary to provide the first acquisition unit 12 with the low-pass filter as described above. Further, the time required for adjusting the optical axis can be shortened by causing the driven unit 22 to make a simple vibration by using a frequency F other than the frequency of the natural vibration in the measurement environment.
  • the generating unit 14b according to the third embodiment is a driven unit 22 having different rotation angles of the driven unit 22 with reference to the rotation angle of the driven unit 22 in an arbitrary state of the driven unit 22.
  • the function of the generation unit 14 according to the first embodiment may be provided.
  • FIG. 10 is a block diagram showing an example of the configuration of a main part of the optical axis adjustment system 200c to which the optical axis adjustment device 10c according to the fourth embodiment is applied.
  • a second acceleration sensor 17, a first acquisition unit 12, a second acquisition unit 18, a calculation unit 19_1, and a confirmation unit 19_2 are added to the optical axis adjusting device 10a according to the second embodiment.
  • the generation unit 14 according to the second embodiment is changed to the generation unit 14c.
  • the angle of the optical axis of the headlight 20 is adjusted to the legal angle after the adjusting unit 15a adjusts the angle of the optical axis of the headlight 20 to the legal angle. It is possible to confirm whether or not it is.
  • FIG. 10 the same blocks as those shown in FIG. 6 are designated by the same reference numerals, and the description thereof will be omitted.
  • the optical axis adjusting device 10c includes a first acceleration sensor 11, a second acceleration sensor 17, a first acquisition unit 12, a second acquisition unit 18, a calculation unit 19_1, a confirmation unit 19_2, a control unit 13, a generation unit 14c, and an adjustment unit 15a. , And a reception unit 16.
  • the first acquisition unit 12, the second acquisition unit 18, the calculation unit 19_1, the confirmation unit 19_2, the control unit 13, the generation unit 14c, the adjustment unit 15a, and the reception unit 16 included in the optical axis adjusting device 10c are shown in FIG. It is realized by the same hardware configuration as the optical axis adjusting ECU 100 shown.
  • the second acceleration sensor 17 is mounted on the driven unit 22. Specifically, for example, as shown in FIG. 11, the first acceleration sensor 11 is mounted on the projection lens 23 of the headlight 20 included in the driven unit 22. In FIG. 11, the same blocks as those shown in FIGS. 2 or 3 are designated by the same reference numerals, and the description thereof will be omitted.
  • the second acceleration sensor 17 detects acceleration in a direction 90 degrees different from the direction of acceleration detected by the first acceleration sensor 11 in the pitch direction of the vehicle 1.
  • the driven unit 22 is driven so that the optical axis of the projection lens 23 and the direction of acceleration detected by the first acceleration sensor 11 are orthogonal to each other in the pitch direction. It is assumed that it is placed in. That is, the second acceleration sensor 17 will be described as being mounted on the driven unit 22 so that the optical axis of the projection lens 23 and the direction of the acceleration detected by the second acceleration sensor 17 are in the same direction. ..
  • the second acquisition unit 18 acquires the output value output by the second acceleration sensor 17. Specifically, for example, the second acquisition unit 18 receives the output signal output by the second acceleration sensor 17 and acquires the output value indicated by the output signal.
  • the generation unit 14c is the first in each of a plurality of states of the driven unit 22 in which the rotation angle of the driven unit 22 is different from the rotation angle of the driven unit 22 in an arbitrary state of the driven unit 22. Output value information in which the output value output from the acceleration sensor 11 and the rotation angle corresponding to the output value are associated with each other is generated. Further, the generation unit 14c is in each of a plurality of states of the driven unit 22 in which the rotation angle of the driven unit 22 is different from the rotation angle of the driven unit 22 in an arbitrary state of the driven unit 22. The second output value information in which the output value output from the second acceleration sensor 17 and the rotation angle corresponding to the output value are associated with each other is generated.
  • the generation unit 14c uses the rotation angle of the driven unit 22 in an arbitrary state of the driven unit 22 as a reference for causing the first acquisition unit 12 to acquire the output value as the first step.
  • the rotation angle of the driven unit 22 is determined.
  • the generation unit 14c designates the determined rotation angle of the driven unit 22 to the control unit 13 so that the rotation angle of the driven unit 22 becomes the rotation angle.
  • the control unit 13 controls the drive control device 40.
  • the generation unit 14c causes the first acquisition unit 12 to acquire the output value output by the first acceleration sensor 11, and causes the second acquisition unit 18 to acquire the output value output by the second acceleration sensor 17. Get it.
  • the generation unit 14c associates the output value acquired by the first acquisition unit 12 with the rotation angle of the driven unit 22 designated by the control unit 13, and the second acquisition unit 18 The output value acquired in the above is associated with the rotation angle of the driven unit 22 designated by the control unit 13.
  • the generation unit 14c starts from the first acceleration sensor 11 in each of a plurality of states of the driven unit 22 having different rotation angles of the driven unit 22.
  • the output value output from the sensor 17 and the second output value information corresponding to the rotation angle corresponding to the output value are generated.
  • the adjustment unit 15a Based on the output value information generated by the generation unit 14c, the adjustment unit 15a sets the rotation angle at which the value in the gravity direction of the output value is maximum as the maximum angle, and based on the specified maximum angle, the optical axis angle with respect to the vehicle body. Adjusts the rotation angle of the driven unit 22 so as to satisfy the legal angle. Since the adjusting unit 15a has been described in the second embodiment, detailed description thereof will be omitted.
  • Acceleration sensors such as the first acceleration sensor 11 and the second acceleration sensor 17 generally have individual differences.
  • the output value Gz ( ⁇ s) of the first acceleration sensor 11 and the second acceleration sensor can be expressed by the following equations (5) and (6), respectively.
  • Gz ( ⁇ s) az ⁇ Go ⁇ cos ( ⁇ s) + bz equation (5)
  • Gx ( ⁇ s) ax ⁇ Go ⁇ sin ( ⁇ s) + bx equation (6)
  • az is the sensitivity characteristic value of the first acceleration sensor 11
  • bz is the offset constant of the first acceleration sensor 11
  • ax is the sensitivity characteristic value of the second acceleration sensor 17
  • bx is the offset of the second acceleration sensor 17.
  • the constant and Go are gravitational accelerations.
  • the calculation unit 19_1 calculates the sensitivity characteristic value az of the first acceleration sensor 11, the offset constant bz of the first acceleration sensor 11, the sensitivity characteristic value ax of the second acceleration sensor 17, and the offset constant bx of the second acceleration sensor 17. To do. The calculation method of the sensitivity characteristic value az of the first acceleration sensor 11, the offset constant bz of the first acceleration sensor 11, the sensitivity characteristic value ax of the second acceleration sensor 17, and the offset constant bx of the second acceleration sensor 17 will be described later. ..
  • the confirmation unit 19_2 includes the calculated sensitivity characteristic value az of the first acceleration sensor 11, the offset constant bz of the first acceleration sensor 11, the sensitivity characteristic value ax of the second acceleration sensor 17, and the offset constant bx of the second acceleration sensor 17.
  • the output values output by the first acceleration sensor 11 and the second acceleration sensor 17 at the rotation angle of the driven unit 22 after the adjustment unit 15a is adjusted so that the optical axis angle with respect to the vehicle body satisfies the legal angle.
  • the rotation angle of the driven unit 22 after adjustment is estimated based on the above.
  • the confirmation unit 19_2 has an estimated rotation angle of the driven unit 22 and an adjusted rotation angle of the driven unit 22 adjusted by the adjusting unit 15a so that the optical axis angle with respect to the vehicle body satisfies the legal angle. By comparing with, it is confirmed whether or not the adjusting unit 15a can adjust the rotation angle of the driven unit 22 to a desired angle.
  • the confirmation unit 19_2 estimates the rotation angle ⁇ e of the driven unit 22 by using the following equation (7) based on the equations (5) and (6). More specifically, the confirmation unit 19_2 has an output value Gz ( ⁇ e) from the first acceleration sensor 11 when the driven unit 22 has a rotation angle ⁇ e and a state where the driven unit 22 has a rotation angle ⁇ e. By substituting the output value Gx ( ⁇ e) of the second acceleration sensor 17 into the equation (7), the rotation angle ⁇ e of the driven unit 22 is estimated.
  • the confirmation unit 19_2 has an estimated value of the rotation angle ⁇ e of the driven unit 22 obtained by the equation (7) and a rotation angle of the driven unit 22 adjusted so that the optical axis angle with respect to the vehicle body satisfies the legal angle. , Confirm whether they match, for example, notify the user of the confirmation result.
  • the confirmation unit 19_2 rotates the driven unit 22 adjusted so that the estimated value of the rotation angle ⁇ e of the driven unit 22 obtained by the equation (7) and the optical axis angle with respect to the vehicle body satisfy the legal angle. It is confirmed whether or not the moving angles match, and if they do not match, the confirmation unit 19_2 has the estimated value of the rotation angle ⁇ e of the driven unit 22 obtained by the equation (7) and the angle with respect to the vehicle body optical axis.
  • the adjustment unit 15a may readjust the rotation angle of the driven unit 22 so that the rotation angle of the driven unit 22 adjusted to satisfy the legal angle matches.
  • the calculation unit 19_1 includes the sensitivity characteristic value az of the first acceleration sensor 11, the offset constant bz of the first acceleration sensor 11, and the second acceleration sensor.
  • the sensitivity characteristic value ax of 17 and the offset constant bx of the second acceleration sensor 17 are calculated.
  • FIG. 12A is a graph showing an example of the relationship between the value of the output value output from the first acceleration sensor 11 in the gravity direction and the rotation angle corresponding to the output value.
  • the horizontal axis is the rotation angle
  • the vertical axis is the value in the gravity direction of the output value output from the first acceleration sensor 11.
  • ⁇ indicates an actually measured value of the output value output from the first acceleration sensor 11 in the gravity direction.
  • the output value of the first acceleration sensor 11 can be approximated by a regression curve based on a quadratic curve when ⁇ s is a value of about ⁇ 10 degrees.
  • the alternate long and short dash line is an approximation of the measured value of the output value output from the first acceleration sensor 11 in the direction of gravity by a regression curve based on a quadratic curve.
  • the calculation unit 19_1 approximates the sensitivity characteristic value az of the first acceleration sensor 11 and the offset constant bz of the first acceleration sensor 11 with the measured values of the output values output from the first acceleration sensor 11 in the gravity direction. It is calculated by specifying the regression curve based on the quadratic curve.
  • FIG. 12B is a graph showing an example of the relationship between the value of the output value output from the second acceleration sensor 17 in the gravity direction and the rotation angle corresponding to the output value.
  • the horizontal axis is the rotation angle
  • the vertical axis is the value in the gravity direction of the output value output from the second acceleration sensor 17.
  • ⁇ indicates an actually measured value of the output value output from the second acceleration sensor 17 in the gravity direction.
  • the output value of the second acceleration sensor 17 can be approximated by the regression curve by the linear function when ⁇ s is a value of about ⁇ 10 degrees.
  • the alternate long and short dash line is an approximation of the measured value of the output value output from the second acceleration sensor 17 in the direction of gravity by a regression curve based on a linear function.
  • the calculation unit 19_1 approximates the sensitivity characteristic value ax of the second acceleration sensor 17 and the offset constant bx of the second acceleration sensor 17 to the measured values of the output values output from the second acceleration sensor 17 in the gravity direction. It is calculated by specifying the regression curve by the linear function.
  • the calculation unit 19_1 includes the sensitivity characteristic value az of the first acceleration sensor 11, the offset constant bz of the first acceleration sensor 11, and the second acceleration sensor.
  • the sensitivity characteristic value ax of 17 and the offset constant bx of the second acceleration sensor 17 are calculated.
  • ⁇ (Gz ( ⁇ s)) 2 + (Gx ( ⁇ s)) 2 ⁇ 1/2 is the sensitivity characteristic value az of the first acceleration sensor 11 and the first acceleration sensor 11 so that they are closest to the gravity acceleration Go.
  • the offset constant bz, the sensitivity characteristic value ax of the second acceleration sensor 17, and the offset constant bx of the second acceleration sensor 17 are calculated.
  • the calculation unit 19_1 uses the output value of the first acceleration sensor 11 and the output value of the second acceleration sensor 17 in a plurality of states in which the rotation angles of the driven units 22 are different from each other, thereby using the first acceleration sensor.
  • the sensitivity characteristic value az of 11, the offset constant bz of the first acceleration sensor 11, the sensitivity characteristic value ax of the second acceleration sensor 17, and the offset constant bx of the second acceleration sensor 17 are calculated.
  • the calculation unit 19_1 uses the output values of the first acceleration sensor 11 and the output values of the second acceleration sensor 17 in four states in which the rotation angles of the driven units 22 are different from each other.
  • the sensitivity characteristic value az of 11, the offset constant bz of the first acceleration sensor 11, the sensitivity characteristic value ax of the second acceleration sensor 17, and the offset constant bx of the second acceleration sensor 17 can be uniquely determined.
  • the optical axis adjusting device 10c is driven to detect an acceleration in a direction 90 degrees different from the direction of the acceleration detected by the first acceleration sensor 11 in the pitch direction of the vehicle 1.
  • the second acceleration sensor 17 mounted on the unit 22, the sensitivity characteristic value of the first acceleration sensor 11, the offset constant of the first acceleration sensor 11, the sensitivity characteristic value of the second acceleration sensor 17, and the second acceleration sensor 17
  • the generation unit 14c includes a calculation unit 19_1 for calculating the offset constant of the above, and the rotation angle of the driven unit 22 is set with reference to the rotation angle of the driven unit 22 in an arbitrary state of the driven unit 22.
  • the output value information is generated. It is output from the second acceleration sensor 17 in each of a plurality of states of the driven unit 22 having different rotation angles of the driven unit 22 with reference to the rotation angle of the driven unit 22 in an arbitrary state of the driven unit 22. It has a function of generating the second output value information in which the output value is associated with the rotation angle corresponding to the output value, and the calculation unit 19_1 generates the output value information and the second output value generated by the generation unit 14c.
  • the sensitivity characteristic value of the first acceleration sensor 11, the offset constant of the first acceleration sensor 11, the sensitivity characteristic value of the second acceleration sensor 17, and the offset constant of the second acceleration sensor 17 are calculated based on the information. Configured.
  • the optical axis adjusting device of the present invention can be used as an optical axis adjusting jig in a factory.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

Dispositif de réglage d'axe optique (10) comprenant : un premier capteur d'accélération (11) disposé dans une unité entraînée (22) ; une unité de génération (14) qui génère des informations de valeur de sortie dans lesquelles une valeur de sortie fournie par le premier capteur d'accélération (11) est associée à un angle de rotation correspondant à la valeur de sortie, pour chaque état parmi une pluralité d'états de l'unité entraînée (22), l'angle de rotation de l'unité entraînée (22) étant différent dans chaque état, en utilisant comme référence l'angle de rotation de l'unité entraînée (22) dans un état arbitraire de l'unité entraînée (22) ; et une unité de réglage (15) qui, sur la base des informations de valeur de sortie générées par l'unité de génération (14), identifie, comme angle maximal, l'angle de rotation qui maximise la valeur de direction de gravité pour la valeur de sortie indiquée par les informations de valeur de sortie, et qui règle l'angle de l'axe optique d'un phare (20) à un angle prescrit, à l'aide de l'angle maximal identifié comme référence.
PCT/JP2019/017762 2019-04-25 2019-04-25 Dispositif de réglage d'axe optique et procédé de réglage d'axe optique WO2020217421A1 (fr)

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JP2021515060A JP6914472B2 (ja) 2019-04-25 2019-04-25 光軸調整装置及び光軸調整方法

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023276137A1 (fr) * 2021-07-02 2023-01-05 三菱電機株式会社 Dispositif de réglage d'axe optique, système de réglage d'axe optique et procédé de réglage d'axe optique

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Publication number Priority date Publication date Assignee Title
JPS6120836A (ja) * 1984-07-02 1986-01-29 シビエ・プロジエクトール 自動車用前照灯の組立および方向調節方法とその実施のための自動車用前照灯
JPH0572972B2 (fr) * 1985-11-19 1993-10-13 Nissan Motor
JP2000193559A (ja) * 1998-12-29 2000-07-14 Robert Bosch Gmbh 車両の前方に生じる照明の視覚化装置
EP2708417A2 (fr) * 2012-09-13 2014-03-19 Valeo Schalter und Sensoren GmbH Phare de véhicule à direction d'émission pivotante dans le sens vertical
JP2015155242A (ja) * 2014-02-20 2015-08-27 三菱電機株式会社 前照灯用光軸制御装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6120836A (ja) * 1984-07-02 1986-01-29 シビエ・プロジエクトール 自動車用前照灯の組立および方向調節方法とその実施のための自動車用前照灯
JPH0572972B2 (fr) * 1985-11-19 1993-10-13 Nissan Motor
JP2000193559A (ja) * 1998-12-29 2000-07-14 Robert Bosch Gmbh 車両の前方に生じる照明の視覚化装置
EP2708417A2 (fr) * 2012-09-13 2014-03-19 Valeo Schalter und Sensoren GmbH Phare de véhicule à direction d'émission pivotante dans le sens vertical
JP2015155242A (ja) * 2014-02-20 2015-08-27 三菱電機株式会社 前照灯用光軸制御装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023276137A1 (fr) * 2021-07-02 2023-01-05 三菱電機株式会社 Dispositif de réglage d'axe optique, système de réglage d'axe optique et procédé de réglage d'axe optique
JP7350219B2 (ja) 2021-07-02 2023-09-25 三菱電機株式会社 光軸調整装置、光軸調整システム、及び光軸調整方法

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