JP7193958B2 - In-vehicle rangefinder test equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a test device for a vehicle-mounted rangefinder. The present invention particularly relates to a test apparatus for testing an in-vehicle LIDAR (laser radar measurement apparatus).

In recent years, technological development related to automatic driving has progressed, and in-vehicle ranging devices such as LIDAR (Light detection and ranging: hereinafter referred to as "lidar ranging device") are indispensable for automatic driving technology. A radar ranging device (see, for example, Patent Document 1) can be cited. This laser radar rangefinder uses near-infrared (NIR) to irradiate a pulse laser (pulse light) to detect the shape of surrounding buildings, median strips, street lights, etc. to measure the distance to surrounding objects. By the way, the advantage of the in-vehicle laser radar measuring device is that it can detect an object at a distance of 200 to 300 m, and it has the advantage of being able to detect an object even in a region that cannot be detected by a measuring device using a millimeter wave radar.

On the other hand, in-vehicle laser radar rangefinders irradiate a pulsed laser using near-infrared rays and measure the time it takes for the pulsed laser to reflect off an object (target) and return. Smoke, water droplets, etc. affect the detectable distance. For this reason, it is essential to conduct an environmental resistance test for a vehicle-mounted laser radar rangefinder.

Japanese Patent Application Laid-Open No. 2001-215275

Conventionally, the environmental durability test of an in-vehicle laser radar ranging device is carried out by actually carrying out the vehicle loaded with the in-vehicle laser radar ranging device, which is the object to be tested, in a large, full-scale test site where the environmental resistance test can be performed. It is carried out by generating fog, rain, etc., and the cost of the test site and facilities for conducting the test is enormous. Moreover, since the environmental resistance test conducted in a vast test site is large-scale, the time for conducting the environmental test is limited.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a testing apparatus for an in-vehicle range finder which does not require an environmental resistance test of the in-vehicle range finder in a large test field and can reduce the cost of the environmental test. do.

In order to solve the above-mentioned problems, a first aspect of a testing apparatus for a vehicle-mounted distance measuring device according to the present invention has a light receiving section that receives laser light emitted from an irradiating section as incident light. A test device for an in-vehicle distance measuring device that measures the time from the point of time until the incident light is received and the intensity of the incident light, and measures the distance and optical characteristics of the object to be measured based on the measurement time. and a housing that accommodates the object to be measured and the reflecting unit and whose inner surface is coated with an anti-reflection coating, and the object to be measured and the reflecting unit are irradiated from the irradiation unit. It is arranged in the housing such that the emitted laser light is reflected by the object to be measured through the reflector, and the light reflected by the object to be measured enters the light receiving unit through the reflector. Characterized by

In another aspect of the vehicle-mounted distance measuring device test apparatus of the present invention, the reflecting section is composed of a plurality of reflecting mirrors, and a linear movement stage section for moving the reflecting mirror at least horizontally by a predetermined distance. , an angle stage for tilting the reflection surface of the reflection mirror horizontally or vertically by a predetermined angle, and a reflection mirror fixing jig for fixing the reflection mirror to the angle stage. are spaced apart on rails extending in the direction of

Further, according to another aspect of the vehicle-mounted range finder testing apparatus of the present invention, the reflecting section is composed of a plurality of reflecting mirrors and a linear movement stage for moving the reflecting mirror at least horizontally by a predetermined distance. an angular stage for tilting the reflecting surface of the reflecting mirror by a predetermined angle in each of the horizontal and vertical directions; and a reflecting mirror fixing jig for fixing the reflecting mirror to the angle stage. The parts are characterized in that they are spaced apart on rails extending in one direction.

Furthermore, another aspect of the test apparatus for the in-vehicle distance measuring device of the present invention is provided with an adjusting unit for adjusting the amount of movement of the reflecting mirror in the horizontal direction and the inclination angle of the reflecting surface of the reflecting mirror. , the laser beam emitted from the irradiation unit is reflected by the object to be measured via the reflecting mirror, and the reflected light reflected by the object to be measured is incident on the light receiving part via the reflecting mirror. and the angle of the stage section with respect to at least one of the horizontal direction and the vertical direction.

Furthermore, another aspect of the test device for the in-vehicle distance measuring device of the present invention is that an environment-resistant substance supply unit for supplying an environmental substance to the inside of the housing and an environment inside the housing are provided on the side surface of the housing. An exhaust part is provided for exhausting the substance to the outside of the housing.

Furthermore, another aspect of the test apparatus for the in-vehicle distance measuring device of the present invention is characterized in that a diffuse reflector is disposed on the object to be measured.

Furthermore, another aspect of the test apparatus for the in-vehicle distance measuring apparatus of the present invention is characterized in that a corner cube reflector and an ND filter with variable absorptance are arranged on the object to be measured.

According to the present invention, since a test similar to a full-scale test can be performed on a desktop, a test simulating a moving object can be easily performed, and the cost of the environmental test can be reduced.

It is a figure which shows the structure of the test apparatus of the vehicle-mounted ranging device of this invention. 1 is a diagram showing an example of a configuration of a test device for a vehicle-mounted range finder according to an embodiment of the present invention; FIG. 1 is a diagram for explaining the size of a testing apparatus for a vehicle-mounted range finder according to an embodiment of the present invention; FIG. FIG. 4 is a diagram showing a table describing an example of the external size, the number of reflecting mirrors, the distance between the reflecting mirrors, and the distance to the target (forward path length) of the testing device for the in-vehicle rangefinder according to the present invention; 1 is a diagram showing an arrangement example of optical rails and reflection mirrors that constitute a test device for a vehicle-mounted range finder according to an embodiment of the present invention; FIG. 1 is a diagram showing a configuration of a reflection unit that constitutes a testing device for a vehicle-mounted range finder according to an embodiment of the present invention; FIG. FIG. 4 is a diagram for explaining the inclination of a reflecting mirror that constitutes the testing device for the in-vehicle range finder according to the embodiment of the present invention; FIG. 10 is a diagram showing an example of the configuration of a test device for a vehicle-mounted range finder according to another embodiment of the present invention; FIG. 10 is a diagram showing an example of a configuration of a vehicle-mounted range finder testing apparatus according to still another embodiment of the present invention; FIG. 10 is a diagram showing an example in which optical rails and reflecting mirrors constituting a vehicle-mounted range finder test apparatus according to still another embodiment of the present invention are arranged in the vertical direction; FIG. 11 is an internal see-through perspective view showing the appearance of a test apparatus for a vehicle-mounted range finder having an optical rail and reflecting mirrors arranged as shown in FIG. 10;

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the configuration of a testing device for a vehicle-mounted distance measuring device according to the first embodiment of the present invention.

A test device 1 for a vehicle-mounted distance measuring device includes a pulsed laser (pulsed light: hereinafter, what is irradiated from an irradiation unit (irradiation unit: not shown) is called an “incident light beam”, and a reflecting mirror (reflecting mirror) 3 The beam reflected from the laser beam is called a “reflected light beam”.). An in-vehicle distance measuring device ( It is an apparatus for testing a sample to be tested) 12. In this embodiment, a lidar rangefinder using a near-infrared pulse laser as the in-vehicle rangefinder 12 will be described as an example.

[Test equipment]
1 and 2, the test apparatus 1 includes reflecting mirrors 3 (3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, and 3l (reflecting mirrors are composed of n (n is an integer equal to or greater than 1))); It is configured to have a shielding box (shielding housing) 14 for housing.

The inner surface of the shielding box 14 is coated with a non-reflection coating so that the incident light beam and the reflected light beam are not reflected in areas other than the reflecting mirror 3, and an opening is provided near the end of one side surface of the shielding box 14. A light entrance port 7 is formed. As for the position of the opening of the light entrance port 7, it is possible to extend (earn) the distance of the outward and return paths of the optical path more in the vicinity of the side edge of the box, but in the vicinity of the side edge of the box (for example, near the center of the side). may be formed.

[Shielding box]
The shielding box 14 accommodates the reflection unit 2, the target 5, and the optical rail 9. Among the sides of the shielding box 14, the sides other than the side on which the reflection unit 2, the target 5, and the optical rail 9 are arranged have Furthermore, an environment-resistant material supply unit 11 and an exhaust pump 13 are installed. The environmental substance supply unit 11 supplies environmental substances to the shielding box 14 in order to test the environmental resistance performance of the range finder 12 for mounting in an environment dominated by environmental substances such as fog and fine particulate matter. The exhaust pump 13 is for exhausting the environmental substances inside the shielding box 14 to the outside of the shielding box 14 after the above-described test using the environmental substances is completed. Also, a passage 15 is provided for connecting the environment-resistant material supply unit 11 and exhaust pump 13 to the shielding box 14 .

As an example of the shape and dimensions of the shielding box 14, particularly the shape (planar shape) when viewed from directly above the box, as shown in FIG. It has a square shape (length and width are equal), and the height is sufficient so long as the reflecting mirror 3 and the target 5 can be accommodated. The number of reflecting mirrors housed inside the shielding box 14 in this example is 45, and the distance between the reflecting mirrors 3 facing each other in this case (for example, between 3a-3b, 3b-3c, . . . 3k in FIG. 1) -3l) is 1.756 m, and the distance (outward optical path length) until the pulsed laser irradiated from the irradiation unit reaches the target 5 via the reflecting mirror 3 is 80.7 m.

As another example of the shape and dimensions of the shielding box 14, as shown in the table of FIG. 4, it is rectangular with a vertical length of 1800 mm and a horizontal length of 900 mm. As for the height in the case of this example, it is sufficient that the reflecting mirror 3 and the target 5 can be accommodated in the same manner as described above. The number of reflecting mirrors accommodated inside the shielding box 14 in this example is 41, the distance between the reflecting mirrors 3 facing each other in this case is 0.657 m, and the pulse laser emitted from the irradiation unit is reflected. The distance (outward optical path length) to reach the target 5 via the mirror 3 is 26.9 m.

As another example of the shape of the shielding box 14, as shown in the table of FIG. It is. As for the height in the case of this example, it is sufficient that the reflecting mirror 3 and the target 5 can be accommodated in the same manner as described above. The number of reflecting mirrors accommodated inside the shielding box 14 in this example is 83, the distance between the reflecting mirrors 3 facing each other in this case is 3.356 m, and the pulse laser emitted from the irradiation unit is reflected. The distance (outward optical path length) to reach the target 5 via the mirror 3 is 281.9 m.

Regarding the internal size of the shielding box 14, when the ratio of the length to the width is 1:1, the lower limit of the length (width) is 500 mm, and the upper limit is 1000 mm (500 mm < length ( lateral) length < 10000 mm). The above example is merely an example, and it goes without saying that the longer the optical path length is, the longer it can be extended.

[Reflection unit]
The reflecting units 2 are arranged on one side of the shielding box 14 and on the other side opposite to the one side. In the example of FIG. 2, a plurality of reflection units 2 (2a, 2c, 2e, 2g, . 2d, 2f, 2h, . . . 2x, 2z) are arranged on the other side of the shielding box 14. Although the number of reflection units is described as 26 from a to z for convenience, the number may be less or more.

Each of the plurality of reflection units 2 arranged on one side and the other side of the shielding box 14 moves the reflection mirror 3 and the reflection mirror 3 by a predetermined distance in at least one direction (X-axis direction). a θ stage (angle stage) 6 for tilting the reflecting surface of the reflecting mirror 3 with respect to the horizontal plane by a predetermined angle; It is configured to have a reflecting mirror fixture 4 for fixing to the stage section 6 . In addition, each of the plurality of reflection units 2 is arranged on an optical rail 9 extending in the X-axis direction with a predetermined distance therebetween (at equal intervals in the examples of FIGS. 1 and 5). As shown in FIG. 2, the reflecting mirror fixing jig 4 has a substantially T-shaped cross section and is composed of a projecting portion and a base formed on the reflecting mirror side. This shape is an example, and is not limited to this shape as long as it is a shape that allows bonding of both the reflecting mirror 3 and the θ stage portion 6 .

A controller (not shown) (adjustment unit: not shown) is required for drive control of the θ stage portion 6 and the X-axis stage portion 8, and the controller can be wired or wirelessly connected to the θ stage portion 6 and the X-axis stage portion 8. connected and installed outside the shielding box 14 . Here, the fixing of the reflecting mirror 3 to the optical rail 9 is performed by joining the projecting portion of the reflecting mirror fixing jig 4 (see FIG. 6) to the rear side surface of the reflecting surface of the reflecting mirror 3 . Attachment methods include bonding by adhesion, etc., but are not limited to this. The base of the reflecting mirror fixing jig 4 is attached and fixed to the surface of the .theta. stage portion 6 on the reflecting mirror side.

In addition to controlling the driving of the θ stage section 6 and the X-axis stage section 8 described above, the controller also has a computing function of presetting the forward optical path length from the irradiation unit of the in-vehicle rangefinder 12 to the target 5 . That is, when the optical path length of the outward path from the irradiation unit to the target 5 (if the optical path length differs between the outward path and the return path, the length of the outward path and the length of the return path) is set with an appropriate numerical value, which reflecting mirror 3 should be used to achieve that optical path length. How much to move in the X-axis direction, how much the reflecting surface of which reflecting mirror 3 is tilted with respect to the horizontal direction and/or the vertical direction, or how much the reflecting surface of the target 5 is tilted with respect to the horizontal direction and/or the vertical direction The degree of tilt is calculated, and based on the calculation result (the position of the reflecting mirror 3 in the X-axis direction (X coordinate), the horizontal angle and/or the vertical angle of the reflecting surface of the reflecting mirror 3 and the target 5), the θ stage The portion 6 and/or the X-axis stage portion 8 are driven by the above-described drive control to move the reflecting mirror 3 to the position (X coordinate) in the X-axis direction, and the reflecting surfaces of the reflecting mirror 3 and the target 5 are set horizontally. Tilt to an angle and/or a vertical angle. The controller has a monitor for displaying a screen for setting the optical path length and a screen for displaying calculation results, etc., but the controller is not provided with a monitor, and a PC or the like is connected to the PC monitor. You may make it display the screen etc. which carried out.

The θ stage unit 6 adjusts the angle of the reflecting mirror 3 with respect to the longitudinal direction (X-axis direction: horizontal direction) of the optical rail 9, and the X-axis stage unit 8 adjusts the distance between adjacent reflecting mirrors 3. By doing so, it is possible to adjust the distance (outward optical path length) until the pulsed laser irradiated from the irradiation unit reaches the target 5 via the reflecting mirror 3 .

[Target part]
The target unit 10 includes the target 5, an X-axis stage unit (linear movement stage unit) 8 for moving the target 5 at least in the longitudinal direction (X-axis direction: horizontal direction) of the optical rail 9 by a predetermined distance, and the target stage (angle stage) 6 for tilting the reflecting surface of 5 by a predetermined angle with respect to the horizontal plane, and a reflecting mirror fixing jig 4 for fixing the target 5 to the .theta. It is The target 5 in this embodiment is a target placed inside the shielding box 14, but the objects to be measured by the lidar ranging device 12, which is the test object, are people, vehicles (automobiles, trains), objects around the roadway, A part of the road is assumed.

In the target 5 as well, the .theta. By adjusting the position on the X-axis (see FIG. 7), the distance (optical path length of the outward path) until the pulsed laser irradiated from the irradiation unit reaches the target 5 via the reflecting mirror 3 is adjusted. be able to.

By the way, the function of the lidar rangefinder 12 is to perform scanning in the horizontal and vertical directions with laser light emitted from the irradiation unit of the lidar rangefinder 12, thereby determining the position and shape of objects existing around the own vehicle. The target 5 is an object to be measured by the lidar rangefinder 12 . In addition, it is preferable that a reflecting material (reflecting material) having a predetermined reflectance is applied or attached and fixed to the reflecting surface (the receiving surface of the incident light beam) of the target 5 . This is because non-reflective objects can also be targeted.

Also, a corner cube reflector (diffuse reflector: not shown) having excellent retroreflection characteristics may be used for the reflecting surface of the target 5 . A corner cube reflector with excellent retroreflection characteristics is, for example, a corner cube reflector that has characteristics such that even when the incident angle of a laser beam is small, the optical power of retroreflected light is less attenuated than when the incident angle is large. . When a corner cube reflector is used, it is desirable to additionally arrange an ND (Neutral Density: not shown) filter capable of varying light absorption (light transmittance) in front of the corner cube reflector. A reflective ND filter having a predetermined light absorption rate is desirable.

[Optical rail]
Optical rails 9 (9a) and 9 (9b) as a pair of track members are provided parallel and horizontally inside the shielding box 14, that is, between the opposing side surfaces. As shown in FIG. 6, a plurality of X-axis stage units 8 are attached to optical rails 9 (9a) and 9 (9b) so as to be reciprocally movable. Therefore, the reflection unit 2 having the X-axis stage section 8 can reciprocate horizontally (X-axis) along the optical rail 9 .

[In-vehicle rangefinder]
In each of the following examples, a lidar rangefinder is used as the in-vehicle rangefinder 12, which is a sample to be tested. The lidar rangefinder 12 includes an irradiation unit (not shown) that irradiates light (incident light beam) in a wavelength range corresponding to the pulse laser, and light (reflected light beam) that is the incident light beam reflected by the target 5. and a light receiving unit (not shown) for receiving light. As the pulse laser applied as the incident light beam and the reflected light beam, near infrared rays (NIR) having a wavelength range of 0.85 μm to 1.5 μm in infrared rays (IR) are used, but other wavelength ranges are used. or may be visible light without being limited to these infrared rays.

(First embodiment)
The operation of the test apparatus according to the first embodiment of the present invention will be described below with reference to FIG.

Before the incident light beam is irradiated, the irradiation angle of the incident light beam (horizontal direction angle (horizontal angle) and vertical direction angle (vertical angle)) is adjusted (set) in advance by a scanning unit (not shown) of the irradiation unit. be done. Although the example of FIG. 2 is an example in which only the horizontal angle is set, adjustment of the horizontal angle and the vertical angle will be described in a fourth embodiment, which will be described later.

Here, the horizontal angle of the incident light beam to be set is determined by the light beam emitted from the irradiation unit of the lidar rangefinder 12 being reflected by the target 5 via the plurality of reflecting mirrors 3 and reflected by the target 5. It is necessary to adjust (set) in advance so that the light beam is received by the light receiving unit of the lidar rangefinder 12 via the plurality of reflecting mirrors 3 . In the example of FIG. 2, the horizontal angle of the target 5 is also adjusted (set) by driving the .theta. there is The horizontal angle to be adjusted is calculated by the controller as to how much the reflective surface of the target 5 should be tilted with respect to the horizontal direction in order to achieve the predetermined optical path length from the irradiation unit to the target 5. Then, the .theta. stage section 6 is driven by the above-described drive control based on the result of the calculation, and the reflecting surface of the target 5 is tilted to the determined horizontal angle.

In the example of FIG. 2, the incident light beam is incident on the reflection mirror 3 (3a) of the reflection unit 2a, and then reflected by the reflection mirrors 3 (3b, 3c, . . . , 2y, 2z) of the reflection units 2b, 2c, . , 3y, 3z) in order, is incident on the target 5, which is the arrival point on the forward path, and is reflected by the target 5. Then, the reflected light beams are reflected by the reflecting mirrors 3z, 3y, . . . , 3c, 3b, The horizontal angle is adjusted (set) in advance so that the light beams reflected by the reflecting mirror 3a are received by the light receiving unit of the lidar distance measuring device 12 after being reflected one after another in the order of 3a.

When the light beam reflected by the reflecting mirror 3a is received by the light receiving unit of the lidar distance measuring device 12, a calculation unit (not shown) of the lidar distance measuring device 12 irradiates the incident light beam from the irradiation unit. The time required for the reflected light beam to be received by the light receiving unit is calculated, and the optical path length of the outward path from the irradiation unit to the target 5 via the reflecting mirrors 3a, 3b, 3c, . , the optical path length of the return path from the target 5 to the light receiving unit via the reflecting mirrors 3z, 3y, . . . 3c, 3b, and 3a is calculated. Then, the calculated optical path length is compared with a preset optical path length to calculate the attenuation factor.

(Second embodiment)
Next, operation of the second embodiment of the testing apparatus according to the embodiment of the present invention will be described with reference to FIG.

This embodiment differs from the above-described first embodiment in that, in the first embodiment, the target 5 is tilted by a predetermined angle on the θ stage section 6, but in this embodiment, the lidar rangefinder 12 The reflecting mirror 3 (3a) of the reflecting unit 2a and the reflecting mirror 3 (3b) of the reflecting unit 2b are set horizontally by the θ stage section 6 in advance so that the incident light beam is irradiated in the front direction of the lidar rangefinder 12. The point is that it is tilted by an angle. This makes it possible to test cases in which light is emitted in the front direction of the lidar rangefinder 12 . The principle of tilting the reflecting mirror 3 by a predetermined horizontal angle is the same as in the case of tilting the target 5 in the first embodiment, so the explanation is omitted here.

(Third embodiment)
Next, the operation of the test apparatus according to the third embodiment of the present invention will be described with reference to FIG.

This embodiment is an example in which the optical path length is changed, and specifically, it is an example in which the optical path length is made shorter than that in the above-described first embodiment. In this embodiment, the inclination of the reflection mirror 3 (3a) of the reflection unit 2a and the inclination (horizontal angle) of the target 5 are increased to reduce the number of reflections from the irradiation unit of the lidar rangefinder 12 to the target 5. It can be realized by Conversely, in order to lengthen the optical path length, the number of reflection units should be increased to increase the number of reflections. The principle of tilting the reflecting mirror 3 and the target 5 by a predetermined horizontal angle is the same as the case of tilting the target 5 in the first embodiment, so the explanation is omitted here.

(Fourth embodiment)
In the above-described embodiment, the reflection mirror and the target are movable in the horizontal direction (X-axis direction) and tilted by a predetermined horizontal angle. A plurality of optical rails 19 (19') are installed at predetermined intervals in the vertical direction on one side surface and the other side surface opposite thereto, and each optical rail 19 (19A (19A'), . . . , 19Z ( 19Z')), a plurality of reflecting mirrors 23 (23aA (23aA') to 23zA (23zA'), ..., 23aZ (23aZ') to 23zZ (23zZ')) are attached at predetermined intervals It can be something like that.

Before the incident light beam is irradiated, the irradiation angle of the incident light beam (horizontal direction angle (horizontal angle) and vertical direction angle (vertical angle)) is adjusted in advance by a scanning unit (not shown) of the irradiation unit ( set).

Here, the horizontal angle and vertical angle of the incident light beam to be set are such that the light beam emitted from the irradiation unit of the lidar device 22 is reflected by the target 25 via the reflection mirrors 23zE and 23aE', It is necessary to adjust (set) in advance so that the reflected light beams are received by the light receiving unit of the lidar device 22 via the reflecting mirrors 23aE' and 23zE. In the example of FIG. 11, the horizontal and/or vertical angles of the reflecting mirror 23 and/or the target 25 are also set by the controller in advance so that the reflected light beam is finally received by the light receiving unit. 6 is driven and adjusted (set). The horizontal angle and/or vertical angle to be adjusted is the optical path length of the outward path from the irradiation unit to the target 25, which is set in advance as described above. / Or how much to tilt with respect to the vertical direction is calculated by the controller, and based on the calculation result, the θ stage section 6 is driven by the above-described drive control to determine the reflecting surface of the reflecting mirror 23 and/or the target 25 . tilt to the specified horizontal and/or vertical angle.

When the light beam reflected by the reflecting mirror 23zE is received by the light receiving unit of the lidar device 22, the calculation section (not shown) of the lidar device 22 irradiates the incident light beam from the irradiation unit and then the reflected light beam. The time until light is received by the light-receiving unit is calculated, and with the irradiation unit as the starting point, the optical path length of the forward path to the target 25 via the reflecting mirrors 23zE and 23aE', and the target 25 as the starting point, the reflecting mirror 23aE'. , 23zE to the light receiving unit.

(Other embodiments)
In all of the above embodiments, the outward optical path and the return optical path are the same, but the outward optical path and the return optical path may be different. In this case, the number of reflecting mirrors, the horizontal and vertical angles of the incident light beam emitted from the irradiation unit of the lidar device, the horizontal and/or vertical angles of the reflecting mirrors, the position on the X axis (X coordinate ), even if the horizontal and/or vertical angles of the target are adjusted appropriately so that the optical path of the outward path and the optical path of the return path are different, the light beam reflected by the target passes through the reflecting mirror on the return path and the light receiving unit of the lidar device. light is received at

Moreover, the embodiments of the present invention are not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

1 test device for in-vehicle distance measuring device 2 reflection unit 3 reflection mirror 4 reflection mirror fixing jig 5 target 6 θ stage section 7 light entrance port 8 X-axis stage section 9 optical rail 10 target section 11 environment-resistant material supply section 12 vehicle range finder (lidar range finder)
13 Exhaust pump 14 Shielding box 15 Passage 19 Optical rail 20 Test device for in-vehicle rangefinder 22 In-vehicle rangefinder (rider rangefinder)
23 reflecting mirror 25 target 30 test device for in-vehicle rangefinder 40 test device for in-vehicle rangefinder

Claims (6)

It has a light-receiving part that receives the laser light emitted from the irradiation part as incident light, and measures the time from the time of irradiation of the laser light to the reception of the incident light and the intensity of the incident light, and the measured time. A test device for an in-vehicle distance measuring device that measures the distance and optical characteristics of the object to be measured based on
a reflector that reflects the irradiated laser light;
a housing that accommodates the object to be measured and the reflecting section and has an inner surface coated with an anti-reflection coating;
The object to be measured and the reflecting section reflect the laser light emitted from the irradiating section and the object to be measured through the reflecting section, and the reflected light reflected by the object to be measured passes through the reflecting section. arranged in the housing so as to be incident on the light receiving unit through
The reflecting section is composed of a plurality of reflecting mirrors, a linear movement stage section for moving the reflecting mirror at least horizontally by a predetermined distance, and a reflecting surface of the reflecting mirror that moves horizontally or vertically by a predetermined distance. an angle stage section for tilting by an angle of and a reflection mirror fixing jig for fixing the reflection mirror to the angle stage section;
the reflectors are spaced apart on rails extending in one direction;
A testing device for a vehicle-mounted distance measuring device, characterized by: It has a light-receiving part that receives the laser light emitted from the irradiating part as incident light, measures the time from the irradiation of the laser light until the incident light is received, and measures the intensity of the incident light, and measures the measured time. A test device for an in-vehicle distance measuring device that measures the distance and optical characteristics of an object to be measured based on
a reflector that reflects the irradiated laser light;
a housing containing the object to be measured and the reflecting part and having an inner surface coated with an anti-reflection coating;
has
The object to be measured and the reflecting section reflect the laser light emitted from the irradiating section and the object to be measured through the reflecting section, and the reflected light reflected by the object to be measured passes through the reflecting section. arranged in the housing so as to be incident on the light receiving unit through
The reflecting section comprises a plurality of reflecting mirrors, a linear movement stage section for moving the reflecting mirror at least horizontally by a predetermined distance, and a reflecting surface of the reflecting mirror in the horizontal and vertical directions. an angle stage section for tilting by a predetermined angle; and a reflection mirror fixing jig for fixing the reflection mirror to the angle stage section;
the reflectors are spaced apart on rails extending in one direction;
A testing device for a vehicle-mounted distance measuring device, characterized by: an adjusting unit for adjusting a movement amount for moving the reflecting mirror in the horizontal direction and an inclination angle of the reflecting surface of the reflecting mirror;
The adjusting section reflects the laser beam emitted from the irradiation unit through the reflecting mirror by the object to be measured, and the reflected light reflected by the object to be measured is transmitted through the reflecting mirror to the light receiving unit. Adjusting the amount of movement of the linear movement stage unit and the angle of the angular stage unit with respect to at least one of the horizontal direction and the vertical direction so as to be incident;
3. A testing apparatus for a vehicle-mounted range finder according to claim 1 or 2 , characterized in that: It has a light-receiving part that receives the laser light emitted from the irradiating part as incident light, measures the time from the irradiation of the laser light until the incident light is received, and measures the intensity of the incident light, and measures the measured time. A test device for an in-vehicle distance measuring device that measures the distance and optical characteristics of an object to be measured based on
a reflector that reflects the irradiated laser light;
a housing containing the object to be measured and the reflecting part and having an inner surface coated with an anti-reflection coating;
has
The object to be measured and the reflecting section reflect the laser light emitted from the irradiating section and the object to be measured through the reflecting section, and the reflected light reflected by the object to be measured passes through the reflecting section. arranged in the housing so as to be incident on the light receiving unit through
An environment-resistant substance supply unit for supplying environmental substances to the inside of the housing and an exhaust unit for discharging the environmental substances inside the housing to the outside of the housing are provided on the side surface of the housing. is being
A testing device for an in-vehicle distance measuring device, characterized by: A diffuse reflector is arranged on the measurement object,
5. The testing device for the in-vehicle distance measuring device according to any one of claims 1 to 4 , characterized in that: A corner cube reflector and an ND filter with a variable absorption rate are arranged on the object to be measured.
6. The testing device for a vehicle-mounted distance measuring device according to any one of claims 1 to 5 , characterized in that:

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