JPH1123418A - Inspection equipment for optical range finder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inspection equipment for optical range finder in which various inspection can be carried out simultaneously for one optical range finder and a defect in the optical range finder can be located easily. SOLUTION: A function inspecting part, i.e., a sloped base 4, a performance inspecting part 6 and a stamping part 7 are mounted on one inspection table 9 in order to perform respective inspections sequentially. Function of a laser head 1 is inspected at the sloped base 4, detection performance of the laser head 1 is inspected at the performance inspecting part 6 and a decision is made, at a deciding section 10, whether the laser head 1 is acceptable or not based on an output signal therefrom. A manufacture number is stamped on the laser head 1 at the stamping part 7, based on the decision results.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects, for example, an obstacle which is mounted on a vehicle body and is located ahead of the vehicle when the vehicle is traveling, and allows the driver to recognize the presence of the obstacle, the facing distance, and the like based on the detection result. For an optical distance measuring device, and particularly for an inspecting device for inspecting its detection performance and function.

[0002]

2. Description of the Related Art Conventionally, such an optical distance measuring device, particularly an optical distance measuring device used under a special environment of being installed on a moving body such as a car body, measures from the optical distance measuring device. Unlike a simple optical distance measuring device that measures the distance to an object, it recognizes obstacles, sets the recognition distance and detection area for obstacles, and performs detection performance such as recognition accuracy for dirt, and also occurs when traveling. Various tests such as functional performance such as gravity resistance must be cleared.

In the inspection of such detection performance and functional performance, a plurality of optical distance measuring devices are sequentially inspected in each inspection section in a production line, and those that clear each inspection are transferred to the next inspection section. It was sent and finally cleared of all inspections before being shipped as a product.

On the other hand, in an optical distance measuring apparatus that has not been cleared in each inspection, the same inspection is performed again to specify a defective determination point, and for example, correction of the defective determination point such as replacement of light receiving means. After that, re-inspection is performed.

[0005]

In the optical distance measuring device constructed as described above, since the inspection must be performed in a factory, the necessary inspection items and the actual inspection can be performed. Inspection items and inspection items are also diverse,
Not all tests could be performed in one place.

The present invention has been made in view of the above circumstances, and provides an inspection apparatus for an optical distance measuring apparatus capable of performing various inspections on one optical distance measuring apparatus at the same place and at the same time. The purpose is to do.

[0007]

To achieve the above object, according to the present invention, there is provided a function inspecting section for inspecting the function of an optical distance measuring device, and detection of the optical distance measuring device. A performance inspection unit for inspecting the performance, a determination unit for determining the quality of the optical distance measurement device based on an output signal from the optical distance measurement device, and the optical unit based on a determination result of the determination unit. A marking part for marking a serial number on a distance measuring device, and the function inspection part, the performance inspection part,
A single inspection table equipped with the seal unit, each operation is sequentially and sequentially inspected, and only when each of the inspections passes, the seal unit applies the seal to the optical distance measuring device. The gist of the invention is that defective products are thereby prevented from being mixed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of an inspection apparatus for an optical distance measuring apparatus according to the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a laser head as an optical distance measuring device, reference numeral 2 denotes an inspection device thereof, and reference numeral 3 denotes a reflex reflector as a pseudo obstacle recognized by the laser head 1.

The reflex reflector 3 is, for example, a reflex reflector (retroreflective plate) provided on a support of a guardrail, a rear part or a pedal of a bicycle, a lens of a brake lamp (or a turn signal lamp) of a motorcycle or an automobile, or the like. Etc.), and has a characteristic of reflecting an incident light beam in substantially the same direction. In particular, the laser head 1 is required to be installed in a vehicle so as to be recognized as an obstacle. The reflex reflector 3 according to the present invention includes a mounting table 3b such as an upper end of a pole 3a.
And is provided at a position separated from the laser head 1 by a predetermined distance L.

An inspection device 2 for inspecting a laser head 1 mounted on a vehicle includes an inclined table 4 as a function inspection unit for inspecting the pass / fail of a pendulum type acceleration sensor built in the laser head 1. , Laser head 1
A mounting table 5 on which the laser head 1 is mounted in order to inspect the detection performance of the laser head, a performance inspection unit 6 for inspecting the detection performance of the laser head 1 while being mounted on the mounting table 5,
A marking unit 7 for marking a serial number on the laser head 1, an inclination table 4, a mounting table 5, a performance inspection unit 6, an inspection table 9 having a base 8 on which the marking unit 7 is placed, and a personal control unit for main control. And a computer 10.

The tilt table 4 is for checking whether or not an acceleration sensor built in the laser head 1 is normal. The laser table 1 is mounted on the tilt table 4 tilted at a predetermined angle. The laser head 1 becomes oblique,
A temporary acceleration corresponding to the acceleration acting on the laser head 1 when actually traveling is generated in the laser head 1. In addition, a set signal L / S is installed on the inclined table 4. The material of the inclined table 4 is selected so as not to damage the laser head 1.

The mounting table 5 includes, for example, a support portion 5a for supporting the left and right flanges 1a for mounting the vehicle body provided in advance on the laser head 1 and a downward flange for mounting the vehicle body similarly provided on the laser head 1 in advance. (Not shown). For example, the structure is such that the outer diameter of the frame is used as a guide and automatically fixed by a cylinder or the like. It should be noted that a cylinder having a sensor for detecting the clamp end and the unclamped end is selected as the cylinder for clamping. As a safety measure, after the operator sets the laser head 1 and the harness connector, a check start switch (not shown) is pressed to turn on the sensor at the clamp end of the clamp cylinder, and then power is supplied to the laser head 1. As the material of the mounting table 5, a material (Bake or Delrin) that does not cause the laser head 1 to be scratched is selected.

As shown in FIG. 3, the performance inspection section 6 pushes out a plurality of ND filters F1 to F7 for measuring distance, halftone filters F8 and F9 for detecting dirt accuracy, and ND filters F1 to F7. Cylinder 11 (only one is shown) and a dot filter F8. Cylinders 12 and 13 for loading and unloading F9, and optionally extruded N
The tips of the D filters F1 to F7 are applied and positioned, and N after use (including when switching).
And a cylinder member 14 for pushing the D filters F1 to F7 back to the initial position.

By using these ND filters F1 to F7 individually or in combination, the ND filters F1 to F7 can be used in combination with the laser head 1 while being fixed at a position 20 m away from the laser head 1, for example. By making a state similar to the case where the distance between the reflex reflector 3 and the reflex reflector 3 is changed, the inspection can be performed with a predetermined measurement accuracy.

The dot filters F8 and F9 are required to maintain the detection performance up to a certain degree of dirt even when dirt adheres to the laser head 1 due to, for example, running on rainy weather. This is used for inspection by generating dirt equivalent to a pseudo, for example, by providing a halftone dot on a translucent plate such as a glass plate for a strong dirt and a weak dirt. It forms a very dirty. Each of the filters F1 to F9 has an independent cylinder 11, 1
The cylinders 11, 12, and 13 are operated according to instructions from the personal computer 10 connected to the cylinders 2 and 13.

The marking section 7 is for stamping a print indicating that the inspection has passed on the back surface of the laser head 1 when the various inspections are passed, and includes a stamp member 7a and an ink base 7b. It is rotatable within the range between the ink table 7b and the laser head 1.

The inspection table 9 maintains the horizontal state of the base 8 at the time of the function inspection by the inclined table 4 and three-dimensionally moves the base 8 at the time of the performance inspection by the performance inspection section 6 mounted on the mounting table 5. Direction, the laser head 1 is automatically directed toward the reflex reflector 3, and the inspection laser beam is irradiated. In other words, the laser beam is reflected so as to receive the reflected light beam from the reflex reflector 3. Moving stages 15 and 16 for searching for flex reflector 3
And motors 17 for driving the moving stages 15 and 16,
18, a stage control unit 19 for controlling the driving amount of the motors 17, 18, a fluid control unit 20 for supplying fluid such as air to the cylinders 11, 12, 13, 14, and a power supply for supplying power to various driving members And a supply unit 21.

Next, the inspection procedure of the present invention will be described.

(Inspection Procedure) (1) Insert the connector of the laser head 1 into the mating connector on the jig connected to the personal computer 10.

(2) The laser head 1 is installed on the inclined table 4 to inspect the acceleration sensor built in the laser head 1.

(3) The A / D conversion value of the output of the acceleration sensor is checked based on the set signal to the tilt table 4.

(4) A start switch (not shown) for inspection of the acceleration sensor is turned on (a power supply voltage is applied to check the voltage).

(5) If the output from the acceleration sensor is OK, an OK message for proceeding to the next inspection, such as "Please set the laser head on the mounting table!", Is displayed on the monitor 10a of the personal computer 10.

(5 ') The output from the acceleration sensor is NG
In this case, an NG message is displayed on the monitor 10a to urge the user to stop the measurement.

(6) The clamps 5c, 5c of the mounting table 5 are operated to fix the laser head 1 to the mounting table 5 (the clamp sensor is turned on by extension of the cylinders 5c, 5c).

(7) Measure the emission intensity data and check the output flag.

(8) The ND filters F1 to F7 are selected singly or in combination, and the cylinder is operated so that the attenuation rate becomes a predetermined value to shift to the front surface of the laser head 1.

(9) The optical axes of the laser light emitted from the laser head 1 by operating the rotary stages 15 and 16;
The point at which the optical axis of the reflected laser coincides (the center in the vertical direction, that is, the point with the largest amount of received light is searched first, then the center in the horizontal direction at that time is searched, and then the center in the vertical direction is searched again. Make sure they match.) If there is a difference between the value obtained when the center in the vertical direction is searched again and the value obtained by searching the center in the vertical direction first, the optical axis alignment is repeated (final deviation amount judgment is separately set).

(10) When the optical axes coincide with each other, the zero point of the rotary stages 15 and 16 is recognized as the origin and stored (in the horizontal and vertical directions).

(11) The ND filter F1 in which the cylinder member 14 is extended to be displaced to the front of the laser head 1.
To F7 are all returned to the initial positions.

(12) In order to measure the area at 50 m, the ND filters F1 to F7 are shifted to the front surface of the laser head 1 so that the ND filters F1 to F7 alone or in combination have a predetermined value.

(13) Measure the distance.

(14) The light receiving distance (area) at this time is measured by swinging the rotary stages 15 and 16 in the horizontal and vertical directions at a specified swing angle by a specified angle.

(15) If the area measurement is OK, all the ND filters F1 to F7 are returned.

(16) For measuring the area at 100 m, the ND filters F1 to F7 are moved to the front surface of the laser head 1 so that the ND filters F1 to F7 alone or in combination have a predetermined value.

(17) Similarly, the area is measured, and all the ND filters F1 to F8 are returned.

(18) In order to measure the area at 30 m, the rotary stages 15 and 16 are swung by a specified swing angle in the horizontal and vertical directions by a specified angle, and the light receiving distance (area) at this time is measured. I do.

(19) When the measurement is completed, it is determined whether the measurement area is within the standard.

(20) The pass / fail of the standard value is determined.

(21) If the content is out of the standard, a message is displayed on the monitor 10a indicating the NG content, the measurement is stopped, and the buzzer is sounded to recognize the content (return to the unit origin and stop emitting the laser beam). In addition, the buzzer sound release and the clamp release (monitor 10a
Message).

(22) Return all the ND filters F1 to F7 to their initial values.

(23) In order to detect surface glass dirt, the cylinder 12 is operated to activate the halftone dot filter F8 (large dirt).
To the front of the glass.

(24) A pass / fail judgment is made based on whether or not the detected distance at this time is a predetermined value.

(25) Return the dot filter F8.

(26) The cylinder 13 is operated to move the halftone dot filter F9 (small dirt) on the front surface of the glass.

(27) A pass / fail judgment is made based on whether or not the detected distance at this time is a predetermined value.

(28) Return the dot filter F9.

(29) If all of the above check items are OK, the marking unit 7 is operated to stamp on the laser radar 1.

(30) OK is displayed on the monitor 10a, and the clamp cylinder of the laser head 1 is released.

In such an operation procedure, all operations other than the attachment and detachment of the laser head 1 to and from the tilt table 4 and the mounting table 5 and the connection and disconnection of the harness connector to and from the laser head 1 are automatically performed, and the pass / fail of the standard value is determined. I do.

As described above, since the inspection of the laser head 1 as the optical distance measuring device can be performed by one machine and by a series of operations, the incorporation of defective products can be prevented.

Further, by using a plurality of ND filters F1 to F7, it is possible to measure an area at a distance different from the installation distance by the reflex reflector 3 installed at one place, and even in a narrow inspection space. Inspection becomes possible, and the inspection time can be shortened.

[0054]

As described above, in the inspection device for an optical distance measuring device according to the present invention, a function inspection section for inspecting the function of the optical distance measuring device, and the optical distance measuring device, A performance inspection unit for inspecting the detection performance of the optical distance measurement device, a determination unit that determines the quality of the optical distance measurement device based on the output signal from the optical distance measurement device, based on the determination result of the determination unit The optical distance measuring device is provided with a stamping section for stamping a serial number, and the function inspection section, the performance inspection section, and a single inspection table equipped with the stamping section. In addition, only when each of the inspections passes, the optical distance measuring device is stamped by the marking portion to prevent mixing of defective products, so that various inspections for one optical distance measuring device can be performed at the same time. In time Obtained had, it is possible to perform a specific optical distance measuring device and the malfunction determination portion easily.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic configuration of an inspection device of an optical distance measuring device according to an embodiment of the present invention.

FIG. 2 is a plan view of a main part.

FIG. 3 is a plan view of a performance inspection unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Laser head (optical distance measuring device) 2 ... Inspection device 4 ... Inclined table (functional inspection part) 6 ... Performance inspection part 7 ... Stamping part 9 ... Inspection table 10 ... Personal computer (determination part)

Claims (1)

[Claims] A function inspection unit for inspecting the function of the optical distance measuring device; a performance inspection unit for inspecting the detection performance of the optical distance measuring device; and an output from the optical distance measuring device. A judging unit for judging pass / fail of the optical distance measuring device based on the signal, a marking unit for stamping a serial number on the optical distance measuring device based on a judgment result of the judging unit, the function inspection unit, A performance inspection unit and a single inspection table equipped with the marking unit are provided, and each operation is successively and sequentially inspected, and only when each of the inspections passes, is the marking unit stamped on the optical distance measuring device. An inspection device for an optical distance measuring device, characterized in that a defective product is prevented from being mixed by performing the method.