JP2004198124A - High-speed continuous imaging reinspection method and its apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-speed continuous image reinspection method capable of halting the movement of an object to be inspected in which a problem has occurred in the judgment result of inspection when a trigger signal of a part of the object to be inspected is acquired; returning the object to be inspected to a location at which reinspection can be performed; and performing an accurate retry so as to not only judge the quality of the object to be inspected and but also perform a retry operation again. <P>SOLUTION: A trigger signal input counter is activated at the occurrence of the problem in the judgment result of trigger signal input type high-speed continuous image inspection. Which location the moving part of the object to be inspected is proceeded to is counted to return to a count obtained by adding a correction numerical value to the counted number, and counting is activated. The feeding of the part of the object to be inspected is reversed and returned to a specified location and proceeded by the amount of the added count at a low speed. The part of the object to be inspected in which the problem has occurred in the judgment result of inspection is retried. When the result of the retry has no problem, its feeding is returned to a high speed and shifted to normal inspection. In this way, it is possible to reinspect the part of the object to be inspected. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is a hoop-shaped product obtained by pressing a continuous strip with a press machine (e.g., precision electronic parts and other various precision-processed parts), and inspects the hoop-shaped product during traveling to determine pass / fail, For problematic products, hoop-shaped products can be stopped, reversed, stopped, and run in a very short time, and re-inspection can be performed once or multiple times. The present invention relates to a high-speed continuous image re-inspection method for continuous image inspection and an apparatus therefor, in which reverse running, stopping, and running can be performed in a very short time and inspection can be performed again.
[0002]
[Prior art]
A conventional electronic component image inspection apparatus includes a CCD camera that captures an image of an electronic component and outputs image information, illumination that irradiates the electronic component with irradiation light for main inspection and pre-processing, and illumination light that respectively illuminates the illumination. A light source that supplies light, a lighting control unit that connects the light source and the light source, and is disposed at an intermediate portion of the optical fiber that transmits the irradiation light, and controls conduction and blocking of the irradiation light in response to the supply of the control signal, Some include an image inspection circuit that performs an inspection process based on image information corresponding to each of the reflected light from the electronic component due to each of the irradiation light and outputs a pass / fail judgment output (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-10-19527 (abstract, FIG. 1 and FIG. 2)
[0004]
[Problems to be solved by the invention]
However, the above-described conventional invention merely performs an inspection process based on image information corresponding to each of the reflected light from the electronic component due to each of the irradiation light and outputs a pass / fail judgment.
In such a conventional technology, when a non-defective electronic component is found, the electronic component to be inspected is transported only in one direction, and the electronic component determined to be non-defective is inspected again. could not.
[0005]
In view of the above points, the object of the present invention is not only to judge the quality of an inspection target product, but also to perform a retry operation again, so that a trigger signal at a location of an inspection target product where a problem occurs in an inspection determination result is generated. It is an object of the present invention to provide a high-speed continuous image re-inspection method and an apparatus thereof, in which the traveling is stopped at the obtained time point, returned to a position where re-inspection can be performed, and an accurate retry can be performed.
[0006]
[Means for Solving the Problems]
The high-speed continuous image re-inspection method according to the present invention counts the position to which the running inspection target product has advanced by operating the trigger signal input counter when a problem occurs in the trigger signal input type high-speed continuous image inspection determination result. Return the count to one plus several counts, activate the return count, reverse the feed of the inspection object, return to the specified position, advance the count added at low speed, and make a problem with the next inspection judgment result. If there is no problem with the result of the retry, return to high speed if there is no problem in the retry result, move to normal trigger signal input type high-speed continuous image inspection, and if there is a problem with the result again, perform the retry operation again Stops feeding when a trigger signal is obtained for the part to be inspected where a problem has occurred in the inspection judgment result. It is obtained by the ability to stop an elephant products at the test position.
[0007]
A high-speed continuous image re-inspection apparatus according to the present invention comprises: a forward / reverse rotation control unit of a drive motor serving as a drive source for driving a continuously running inspection target product at a high speed or a low speed; Image processing means having an image processing circuit for inspecting and judging image information obtained by imaging the image and outputting an NG signal or an operation signal; and counting up to which position the traveling inspection object part has advanced, A feed control circuit that operates the return count to a count obtained by adding a correction value such as 1 to a number to the number, and reverses the feed of the inspection object portion to return to a designated position and advance the added count at a low speed; And a re-inspection circuit capable of setting the re-inspection of the target part once or a plurality of times.
[0008]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a flow sheet showing one embodiment of the present invention.
Reference numeral 1 denotes a CCD camera that captures an image of an inspection object A that continuously travels on a stage and outputs a memory image. The inspection target product A is, for example, a product that is continuously fed with a hoop-shaped product obtained by pressing a continuous strip with a press machine, a precision electronic component, a carrier tape, and various other precision processed components. The video signal and the shutter signal output from the CCD camera 1 are sent to the image processing circuit 2. The trigger sensor 3 outputs a trigger signal to the trigger signal receiving circuit 4 in order to notify when the inspection object A has reached the photographing position of the CCD camera 1. The shutter signal is sent to the image processing circuit 2 based on the trigger signal input to the trigger signal receiving circuit 4. The shutter signal received by the image processing circuit 2 is sent to the CCD camera 1, and the inspection object A is photographed by the CCD camera 1. An image of the inspection target A is sent to the image processing circuit 2 as a video signal. The video signal sent to the image processing circuit 2 determines whether or not it is within a preset allowable number of pixels or performs a comparison determination of a set image, a numerical value, and the like. A, and each of the inspection objects A passing in front of the CCD camera 1 is sequentially taken out as a video signal.
[0009]
If the result of the determination as to whether or not the number of pixels of the inspection target product A falls within the preset allowable value of the number of pixels or the result of the comparison determination of the set image, the numerical value, etc., is NG, that is, the pixel of the inspection target product A When the number or the like exceeds the allowable value or the like, a stop signal is sent to the motor controller 5 which is a driving source for driving the inspection target product A, and the normal rotation of the motor (not shown) is stopped. The motor controller 5 includes a stop signal circuit 6, a feed control circuit 7, and a reinspection circuit 8. When a stop signal is sent to the motor, the inspection object A does not stop immediately at the shooting position of the CCD camera 1, but stops at a position ahead of the shooting position of the CCD camera 1 due to inertial force. Become. A stop signal and a retest signal can be transmitted between the feed control circuit 7 and the retest circuit 8.
[0010]
In the case of NG, that is, when a problem occurs in the judgment result of the trigger signal input type high-speed continuous image inspection judgment, the trigger signal input counter is operated, and the position of the inspection object A is counted. The return count is operated from the count number to one plus a few counts, the product feed is reversed, the product is returned to the designated position retracted from the photographing position of the CCD camera 1, and the inspection object A is returned at a low speed from the returned position. Is incremented, and the inspection target product A having a problem in the next inspection determination result is re-inspected. If there is no problem in the re-inspection result, return to high speed, move to normal trigger signal input type high-speed continuous image inspection, and if there is a problem in the result again, perform the re-inspection operation again and check the inspection object with the problem in the inspection judgment result By stopping the feeding when the trigger signal of the product A is obtained, the inspection target product A can be stopped at the specified position retracted from the photographing position of the CCD camera 1 after the re-inspection and the stop are accurately performed.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
This will be described more specifically based on the flowchart shown in FIG.
A forward rotation trigger signal is sent to a motor controller 5 that controls the forward and reverse rotation of a motor (not shown), and the inspection object A is continuously driven at a high speed. The inspection target product A is photographed by the CCD camera 1, and an image of each of the inspection target products A is sent to the image processing circuit 2 as a video signal. The video signal sent to the image processing circuit 2 determines whether or not it is within a preset allowable number of pixels or performs a comparison determination of a set image, a numerical value, and the like. A is driven at high speed, and each of the inspection objects A passing in front of the CCD camera 1 is sequentially taken out as a video signal. In the case of NG, the sum of the number of trigger signals for the overrun from the generation of the stop signal from the stop circuit to the start of reverse rotation, the number of counters for increasing the number of position stabilization, and the number of corrections for the trigger sensor position is obtained. This is measured by a forward rotation overrun counter.
According to conditions such as the shape and pitch of the inspection object A, a predicted maximum variation number at the time of reverse feed is input. This is counted by the position stability increment counter.
[0012]
Depending on the operation state of the trigger sensor 3 at the time of stopping, for example, when dark ON is set, the count -1 is automatically selected in dark (shielding) and the count 0 in light (transmitted) due to light irradiation by the trigger sensor 3 on the inspection object A. I do. According to the trigger sensor operation state at the time of stop (at the time of light ON setting), the count -1 at the time of dark and the count 0 at the time of light are automatically selected by the trigger sensor position correction circuit (see FIG. 3).
In the reverse rotation overrun counter, the sum of the forward rotation overrun counter circuit is subtracted by the reverse rotation trigger signal, and a reverse rotation signal is output until the value becomes zero. At zero, a reverse rotation stop signal and a normal rotation signal are output. The reverse rotation overrun counter circuit calculates the sum of the number of trigger signals for the overrun from the generation of the reverse rotation stop signal to the start of normal rotation, the number of position stabilization increment counters, and the number of trigger sensor position corrections. The reverse rotation overrun counter circuit is connected to a trigger sensor position correction number circuit, and the trigger sensor position correction circuit automatically selects the count -1 in dark and the count 0 in light according to the operation state of the trigger sensor when stopped.
[0013]
The image processing circuit 2 sends a re-examination signal and inputs the number of re-examinations to a re-examination number setting counter in advance. The re-inspection number calculation circuit compares the number of counters for the positive rotation condition end signal with the number of counters for the re-inspection number, and sends a stop signal to the NG stop output circuit when the number of counters for the number of re-inspections is smaller than the number of positive rotation end signal counters. . The re-inspection signal is transmitted to the image processing circuit under the condition of "number of re-inspection number setting counters" or = number of positive rotation end signal counters. The forward rotation operation circuit subtracts the sum of the reverse rotation overrun counter circuit by the forward rotation trigger signal count, outputs a forward rotation signal until it becomes zero, and outputs a forward rotation end signal and a forward rotation stop signal at zero. Other operations are performed as shown in FIG.
[0014]
【The invention's effect】
As can be seen from the above description, the present invention activates the trigger signal input counter when a problem occurs in the trigger signal input type high-speed continuous image inspection determination result, counts up to which position the inspection target product A has advanced, and Return the product to the count obtained by adding the correction value to the count number, activate the count, reverse the product feed, return it to the specified position, advance the count added at low speed, and then the inspection target product that has a problem with the next inspection judgment result Can be re-examined. If there is no problem in the re-inspection result, return to high speed and move to normal trigger signal input type high-speed continuous image inspection, and if there is a problem in the inspection result again, perform re-inspection operation again as necessary and cause a problem in the inspection judgment result By stopping the feed at the time when the trigger signal of the inspected part is obtained, the re-inspection can be performed accurately, and the inspected article can be accurately stopped at the inspection position after the stop.
[0015]
According to the present invention, with the above-described apparatus, the inspection object can be accurately stopped at the inspection position after accurate re-inspection and stop.
[Brief description of the drawings]
FIG. 1 is a block diagram showing one embodiment of the present invention.
FIG. 2 is a flow sheet showing one embodiment of the present invention.
FIG. 3 is a schematic explanatory diagram showing a positional relationship between a trigger sensor and an inspection target product (work).
[Explanation of symbols]
Reference Signs List 1 CCD camera 2 Image processing circuit 3 Trigger sensor 4 Trigger signal receiving circuit 5 Motor controller 6 Stop signal circuit 7 Feed control circuit 8 Re-inspection circuit A Image inspection product

Claims (2)

Trigger signal input type High-speed continuous image inspection When a problem occurs in the judgment result, the trigger signal input counter is activated to count the position of the running inspection object part, and the count number is counted from one to several. Return the count up to the count that added the correction value of the above, actuate the count, reverse the feed of the inspection target part, return it to the specified position, advance the count added at low speed, and then check the inspection target that has a problem in the inspection judgment result Retry the parts, return to high speed if there is no problem with the retry result, move on to normal trigger signal input type high-speed continuous image inspection, and if the problem occurs again, perform the retry operation again and check the inspection result Stop the feed when the trigger signal of the part to be inspected where a problem occurred in the test is obtained, to accurately retry and inspect the part to be inspected after the stop. Stopped at a position, high-speed continuous image reinspection method being characterized in that to allow re-examination by running at low speed. A forward / reverse rotation control means of a drive motor serving as a drive source for driving a continuously running inspection object at a high speed or a low speed, and inspecting and determining image information obtained by imaging the continuously running inspection object portion. An image processing means having an image processing circuit for outputting an NG signal or an operation signal, and counting up to which position the traveling inspection object part has advanced, and adding a correction value such as 1 to several counts to the count. A return control is activated up to the counted number, a feed control circuit for reversing the feed of the inspection target part and returning to the designated position and advancing the added count at a low speed, and one or more re-inspections of the inspection target part A high-speed continuous image re-inspection apparatus comprising a re-inspection circuit that can be set.

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