JP3706280B2 - How to set the home position of the movement sensor - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a home position setting method for a movement sensor for setting a home position of an image sensor that is provided in a bankbook handling device or the like and performs reading.
[0002]
[Prior art]
A bankbook handling device or the like includes an image sensor attached to a carriage. The image sensor and carriage are moved from the home position to a predetermined position by the stepping motor, and the image sensor is used to read the page mark printed on the passbook or to read the final printed line. I have to.
In the conventional home position setting method of the movement sensor, the initial operation (initial operation) is performed, the white tape for detecting the home position fixed on the passbook travel path side of the passbook handling device is detected by the image sensor, and the white tape is detected. The home position was set based on the position of the image sensor at the time.
[0003]
2A and 2B are diagrams showing a conventional home position.
The description format of the bankbook 1 to be read is different for each user (for example, bank), and the location of the page mark 2 is printed on the left side of the bankbook 1 or on the right side. In the bankbook handling apparatus, the home position P is set by moving the image sensor 3 by the initial operation to detect the white tape 5. When actually reading the bankbook 1, after moving the image sensor 3 from the home position P to a predetermined position by a stepping motor (not shown), the bankbook 1 is sent in the running direction.
Since the predetermined distance for moving the image sensor 3 is different for each user, the predetermined distance is determined by reading this information from the defined parameter file. Predetermined distance, for a fixed value to the user your capital, the position of the home position P is not correct, the image sensor 3 can no longer move to the normal reading position 6, page mark or impossible printed line readings It becomes.
The reason for setting the home position P by causing the image sensor 3 to detect the white tape 5 will be described below.
[0004]
FIGS. 3A and 3B are diagrams showing the relationship between the image sensor 3 and the reading position 6.
When adjustment of the image sensor 3 is performed at the stage before shipment of the apparatus, a slight adjustment variation occurs for each apparatus. For example, as shown in FIG. 3B, when adjustment is performed such that the lens 7 does not come directly under the image sensor 3, the reading position 6 is shifted. As described above, even if the reading position 6 is slightly deviated, it is possible to ignore the misalignment by detecting the white tape 5 attached to the accurate position by the image sensor 3 and setting the position of the home position P. Become.
In initial operation, when setting the position of the home position P is the pixel data image sensor 3 is input is determined to be white or black by the threshold, the position on the near the image sensor 3 from the decision number white tape 5 Luke Judge whether there is. When it is determined that the position is not on the position of the white tape 5, the image sensor 3 is moved to the white tape 5 side. When it is determined that the position is on the position of the white tape 5, the image sensor 3 is once moved away from the position of the white tape 5, and returned to the position of the white tape 5 to be detected again. The image sensor 3 that sets the home position P based on the position detected white tape 5.
[0005]
[Problems to be solved by the invention]
However, the conventional home position setting method of the movement sensor has the following problems.
If the white tape 5 for detecting the home position or the light source that illuminates the surface of the white tape 5 and the passbook 1 is contaminated with dust or the like due to environmental deterioration, sufficient output is obtained when the white tape 5 is read by the image sensor 3. Therefore, there is a problem that the white tape 5 cannot be detected and the home position P cannot be set.
[0006]
On the other hand, if the home position P is set by an optical sensor other than the image sensor 3 without using the white tape 5, the positional relationship between the reading field of view of the image sensor 3 and the position where the optical sensor is turned on / off. Must be adjusted. This adjustment requires a measuring instrument such as a synchroscope, which is a very difficult adjustment. For example, when readjustment is necessary for a device operating in the field, it is expected that adjustment will be very difficult.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a first invention of the present invention includes an image sensor that is attached to a carriage that is movable to the left and right and that moves a predetermined distance from the home position together with the carriage to read a predetermined portion of a reading target. The image sensor is caused to move the carriage to cause the image sensor to detect the home position detection mark set in the apparatus, and the home position of the image sensor is determined based on the position where the image sensor detects the mark. In the home position setting method of the movement sensor to be set, the following method is taken.
That is, a detection sensor for detecting that the relative distance between the carriage and the apparatus has reached a predetermined value is attached to the carriage or the apparatus, and the relative distance between the carriage and the apparatus is set to a predetermined value in advance. The difference between the position of the image sensor when it is detected and the position of the image sensor when the mark is detected is measured in advance. The Environmental the image sensor deteriorates in case of no detection of the landmarks in or the image sensor when not detect the mark said purpose, the sensor is a relative distance between the carriage and the apparatus reaches a predetermined value The home position is set on the basis of the position of the image sensor when this is detected, and the fixed distance when the predetermined portion of the reading target is read is corrected by the difference.
[0008]
By adopting such a configuration, even when the image sensor cannot detect the home position detection mark, the home position can be set by using the detection sensor. Further, when the image sensor is moved from the home position set by using the detection sensor, correction is performed based on the difference in the position of the image sensor, so that the mounting state of the detection sensor and the deviation of the visual field of the image sensor are also absorbed.
[0009]
In the second invention, a movement sensor for setting a home position of the image sensor with respect to a device having an image sensor attached to the carriage, or a device having the image sensor and the detection sensor attached to the carriage. The following methods are used in the home position setting method.
That is, the presence / absence of the detection sensor is determined, and when it is determined that the detection sensor is not present, the mark is detected by the image sensor, the home position of the image sensor is set, and it is determined that the detection sensor is present. In this case, the detection sensor is caused to detect that the relative distance between the carriage and the apparatus has become a predetermined value, and the home position of the image sensor is set.
[0010]
By adopting such a configuration, the presence or absence of a detection sensor is determined, and the sensor used when setting the home position is changed according to the determination result. But you can set the home position with a common program.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
First embodiment Fig. 1 is a configuration diagram of a main part of a bankbook handling apparatus showing a first embodiment of the present invention.
The home position setting method of the movement sensor according to the first embodiment is a method applied to a device that reads a predetermined location to be read using an image sensor. In other words, the photocoupler 10, which is a detection sensor that is less susceptible to dirt, is attached to the apparatus, and the home position is set using the photocoupler 10. Here, an application example when the device is a passbook handling device will be described with reference to FIG.
[0012]
For example, a rectangular parallelepiped carriage 12 is supported by two shafts 11a and 11b that are installed so as to cross the passbook running path in the passbook handling device. An image sensor 12a formed of a CCD sensor or the like and a lens are attached to the bottom surface of the carriage 12. Of the two shafts 11a and 11b, the shaft 11a slidably supports the carriage 12, and the shaft 11b is driven and rotated by a stepping motor 13 to which a pulse number is given from a control unit (not shown). The carriage 12 is moved left and right with respect to the direction of the bankbook travel path. A detection rod 14 is further attached to the carriage 12. The tip of the detection rod 14 protrudes from the carriage 12 toward the wall 20 in the apparatus. White tape 21 serving as a home position detection mark is attached to the passbook travel path side of the apparatus. A photocoupler 10 is attached to the wall 20. The photocoupler 10 has a light emitting unit 10a and a light receiving unit 10b, and the detection rod 14 passes between them. The mounting position of the photocoupler 10 is designed so that the detection rod 14 can be detected before the image sensor 12a detects the white tape 21 even if the mounting position is uneven.
The white tape 21 is not soiled before shipping and can be sufficiently detected by the image sensor 12a. A light source (not shown) can guarantee sufficient illuminance.
[0013]
FIG. 4 is a flowchart showing processing performed before shipping the apparatus, and FIG. 5 is a diagram showing output signals of the photocoupler 10 and the image sensor 12a. Processing of the home position setting method performed before shipping the apparatus will be described with reference to FIGS.
Prior to shipment, the processing from step ST1 to step ST5 in FIG. 4 is performed.
[0014]
The photocoupler 10 outputs “L” when the detection rod 14 is not detected, and outputs “L” when the distance between the wall 20 and the carriage 12 reaches a predetermined value and detects the detection rod 14. The image sensor 12a outputs, for example, an “H” level before detecting the white tape 21, and outputs an “L” level when detected. In the first step ST1, based on the output signals of the photocoupler 10 and the image sensor 12a, it is determined whether the photocoupler 10 or the image sensor 12a detects the detection rod 14 or the white tape 21. When it is determined that the detection rod 14 or the white tape 21 is detected (Y), the carriage 12 is moved in the direction away from the wall 20 to a position where the detection rod 14 or the white tape 21 is not detected in step ST2. Let
When it is determined in step ST1 that the detection rod 14 or the white tape 21 has not been detected (N) and in step ST3 after the movement in step ST2, the carriage 12 is moved to the wall 20 by the stepping motor 13. Move closer. By the movement at this time, the detection rod 14 is first detected by the photocoupler 10, and then the white tape 21 enters the field of view of the image sensor 12a and is detected.
[0015]
In step ST4, the difference in the position of the image sensor 12a at both times is calculated from the difference between the time when the white tape 21 is detected by the image sensor 12a and the time when the detection bar 14 is detected by the photocoupler 10. The difference in position of the image sensor 12a is a value other than zero depending on the design of the mounting position of the photocoupler 10.
In step ST5, the position difference of the image sensor 12a is converted into the number of control pulses of the stepping motor 13 and written in a memory or the like. The number of pulses written by performing the above steps ST1 to ST5 becomes a correction value.
[0016]
When performing the initial operation and setting the home position of the image sensor 12a, instead of detecting the white tape 21 by the image sensor 12a, the photocoupler 10 detects the detection rod 14, and the position when the detection rod 14 is detected. And the home position is set based on the detected position. Then, when the image sensor 12a is moved from the home position and a predetermined place is read, the correction value written in step ST5 is added to the movement amount of the image sensor 12a and moved. By doing so, it is possible to absorb adjustment errors of the image sensor 12a itself, attachment of the photocoupler 10, and the like. Further, the output level when the white tape 21 is read by the image sensor 12a is greatly affected by dirt, and the white tape 21 may not be detected. However, optical elements such as the photocoupler 10 are generally contaminated with dust or the like. It is strong and it is unlikely to make a false detection before the lifetime of the device is reached.
[0017]
As described above, in the first embodiment, since the home position is set using the photocoupler 10, the home position can be reliably set even when dirt is assumed. Further, since steps ST1 to ST5 are performed before shipment and the correction value is obtained using both the photocoupler 10 and the image sensor 12a, the adjustment error of the image sensor 12a, the detection position of the image sensor 12a, and the photocoupler are determined. Deviations from 10 detection positions can be absorbed, and initial adjustment and on-site readjustment can be made automatically and accurately.
[0018]
Second Embodiment In the first embodiment, an example has been described in which a photocoupler 10 is provided as a detection sensor in a form handling apparatus having an image sensor 12a, and the home position is set using the photocoupler 10. This embodiment is a home position setting method for a movement sensor for the purpose of sharing program control regardless of the presence or absence of a detection sensor such as a photocoupler 10, and a specific example is shown in FIG. 1 showing the first embodiment. This will be described with reference to FIG.
For example, in a form handling apparatus that employs the home position setting method of the movement sensor, upon receiving an instruction for an initial operation for setting the home position of the image sensor, for example, the correction value written in step ST5 of the first embodiment is used. Read. When this correction value is zero, it is determined that the photocoupler 10 is not present, the white tape 21 for detecting the home position is detected by the image sensor 12a, and the home position is set based on the position. When the correction value is other than zero, it is determined that the photocoupler 10 is present, the photocoupler 10 detects the detection rod 14, and the home position is set based on the position. When it is determined that the photocoupler 10 is present, the correction value is taken into account when the image sensor 12a is moved from the home position.
[0019]
As described above, in the second embodiment, a common program can be used regardless of the presence or absence of a detection sensor provided separately from the image sensor 12a as in the photocoupler 10. Further, for example, when the photocoupler 10 is added to the device without the photocoupler 10 to improve it later, or when the photocoupler 10 is deleted for some reason, the output signal of the photocoupler 10 is preferentially processed. If controlled, there is no need to manage the device version. Furthermore, since the programs are the same, there is an advantage that the development man-hours of the program can be suppressed.
[0020]
In addition, this invention is not limited to the said embodiment, A various deformation | transformation is possible. Examples of such modifications include the following.
(1) In the first and second embodiments, a bankbook handling device is described as an example, but other devices that have an image sensor 12a and need to set the home position of the image sensor 12a are also described. Can be applied.
(2) The photocoupler 10 may use another opposing type sensor or a reflection type sensor.
(3) In the first embodiment, when the image sensor 12a is moved to read the passbook, the movement amount is corrected with the correction value. However, the home position itself may be shifted with the correction value. Similar advantages are obtained.
(4) In the bankbook handling apparatus of the first embodiment, the photocoupler 10 is attached to the wall 20, but the photocoupler 10 is attached to the carriage 12. The detection rod 14 may be attached to the wall 20.
(5) In the first embodiment, the home position of the image sensor 12a is set by the photocoupler 10, but first , the home position is set by using the image sensor 12a, and the white tape 21 becomes dirty. in, the setting of the home position may be line Uyo Unishi using a photo-coupler 10.
[0021]
【The invention's effect】
As described above in detail, according to the first aspect, since the detection sensor is provided in the apparatus having the image sensor and the home position is set using the detection sensor, the image sensor is used for detecting the home position. Even when the mark cannot be detected, the home position can be set by using the detection sensor. Also, when moving the image sensor from the home position set using the detection sensor, the amount of movement is corrected based on the difference in the position of the image sensor. Can absorb. Therefore, an appropriate home position can be set easily and reliably.
[0022]
According to the second invention, when the presence or absence of the detection sensor is determined, and when it is determined that there is no detection sensor, the mark is detected by the image sensor, the home position is set, and when it is determined that there is the detection sensor Since the detection sensor detects that the relative distance between the carriage and the device has reached a predetermined value and sets the home position of the image sensor, it is a common program for devices that do not have a detection sensor or cannot use it. The home position can be set with.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a main part of a bankbook handling apparatus showing a first embodiment of the present invention.
FIG. 2 is a diagram showing a conventional home position.
3 is a diagram showing a relationship between an image sensor 3 and a reading position 6. FIG.
FIG. 4 is a flowchart showing processing performed before device shipment.
FIG. 5 is a diagram illustrating output signals of the photocoupler 10 and the image sensor 12a.
[Explanation of symbols]
10 Photocoupler 12 Carriage 12a Image sensor 13 Stepping motor 14 Detection rod 21 White tape

Claims (2)

A home position set in the apparatus by moving the carriage relative to an apparatus provided with an image sensor that is attached to a carriage that can be moved to the left and right and moves with a certain distance from the home position together with the carriage to read a predetermined portion to be read. In the home position setting method of the movement sensor, the detection mark is detected by the image sensor, and the home position of the image sensor is set based on the position where the image sensor detects the mark.
A detection sensor for detecting that the relative distance between the carriage and the device has reached a predetermined value is attached to the carriage or the device, and the relative distance between the carriage and the device has reached a predetermined value in advance. Measuring the difference between the position of the image sensor when detecting that and the position of the image sensor when detecting the mark,
When the image sensor in an environment worse that not detected in the landmarks in or the image sensor when not detect the mark said purpose is that the sensor is a relative distance between the carriage and the apparatus reaches a predetermined value A home position setting method for a movement sensor, wherein the home position is set on the basis of the position of the image sensor at the time of detection, and the fixed distance when the predetermined portion of the reading target is read is corrected by the difference. . A home of a movement sensor for setting a home position of the image sensor with respect to a device having the image sensor attached to the carriage according to claim 1 or a device having the image sensor and the detection sensor attached to the carriage. In the position setting method,
Determining the presence or absence of the detection sensor;
When it is determined that the detection sensor is not present, the image sensor is caused to detect the mark and the home position of the image sensor is set.
When it is determined that the detection sensor is present, the movement sensor is configured to set the home position of the image sensor by causing the detection sensor to detect that the relative distance between the carriage and the apparatus has reached a predetermined value. Home position setting method.

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