JP2023079344A - Optical information reading apparatus - Google Patents

Abstract

To easily adjust an installation angle of an optical information reading apparatus.SOLUTION: An optical information reading apparatus body includes an inclination sensor which can output a value indicating an inclination of the optical information reading apparatus body to the horizontal direction or gravity direction. A display unit 101 displays a code image acquired by a camera in association with angular information of the optical information reading apparatus body calculated on the basis of the value output from the inclination sensor when the code image is acquired.SELECTED DRAWING: Figure 15

Description

TECHNICAL FIELD The present disclosure relates to a fixed optical information reader that reads a code given to a work.

In general, an optical information reader captures a code such as a barcode or two-dimensional code attached to a workpiece with a camera, extracts the code contained in the obtained image by image processing, binarizes it, and decodes it. It is configured so that the information can be read by

Further, for example, Patent Literature 1 discloses an inspection apparatus using image processing. In this inspection device, a tilt sensor is provided in the camera that photographs the work, and a diagram and values indicating the degree of tilt of the camera obtained based on the value indicating the tilt output from the tilt sensor are displayed on the display. I am displaying.

JP 2018-205023 A

By the way, the optical information reader may be installed, for example, in a factory line or the like and used in a fixed state, but the angle of the optical information reader needs to be adjusted at the time of installation. Here, Patent Document 1 discloses a technique for displaying a diagram or value indicating the degree of tilt of the camera on a display device, but this technique merely conveys the degree of tilt of the camera to the user. This is not information that can be used to determine whether the angle after adjustment is appropriate.

The present disclosure has been made in view of this point, and an object of the present disclosure is to facilitate adjustment of the installation angle of the optical information reader.

In order to achieve the above object, in one aspect of the present disclosure, an optical information reader main body having a camera for photographing a work to which a code is assigned and decoding means for decoding a code image obtained by the camera; A stationary optical information reader with a display for displaying the code image acquired by the camera can be assumed. The optical information reading device main body has an inclination sensor capable of outputting a value indicating the inclination of the optical information reading device main body with respect to the horizontal direction or the gravitational direction. The display unit associates the code image acquired by the camera with angle information of the optical information reading device body calculated based on the value output from the tilt sensor when the code image was acquired. displayed.

According to this configuration, when the optical information reader main body is installed in a factory line or the like, it is fixed at a certain angle. Since the angle information of the optical information reader main body in the fixed state is displayed on the display device in association with the acquired code image, the user can grasp the angle information of the optical information reader main body and the code image. Based on this, it becomes easier to guess which direction and how much the angle of the main body of the optical information reader should be changed, and fine adjustment of the angle is facilitated.

In another aspect, the optical information reader main body may have a distance sensor capable of outputting a value indicating the distance between the optical information reader main body and the work. In this case, the code image acquired by the camera and the distance between the optical information reader main body and the workpiece can be associated and displayed on the display. As a result, it becomes easier to guess whether the distance of the main body of the optical information reader should be lengthened or shortened, and fine adjustment of the distance is facilitated.

In another aspect, the optical information reader main body may be provided with a main body display section to display the angle information of the optical information reader main body and the distance between the optical information reader main body and the workpiece. As a form of display, for example, a display form using a reference line and a schematic diagram simulating the main body of the optical information reader can be used. Displaying the information makes it easier for the user to intuitively grasp the information.

Angle information may be displayed on the main body display unit only at the time of setting. That is, since the angle information is important at the time of setting, it can be displayed only at the time of setting and not displayed during operation when the need for display is low.

As described above, the code image acquired by the camera and the angle information of the optical information reader main body are associated with each other and displayed on the display unit, so that the installation angle of the optical information reader can be easily adjusted. can be done.

It is a figure explaining the time of operation of an optical information reader. 1 is a block diagram of an optical information reader; FIG. 1 is a front view of an optical information reader; FIG. It is the perspective view which looked at the optical information reader from the connector side. It is the perspective view which looked at the optical information reader from the back side. It is a perspective view which shows the state which rotated the connector. It is a front view of the optical information reader which is not provided with the connector rotation mechanism. FIG. 4 is a perspective view of the optical information reader without a connector rotating mechanism, viewed from the connector side; It is the perspective view which looked at the optical information reader which is not provided with the connector rotation mechanism from the back side. FIG. 4 is a front view of a board on which a tilt sensor is mounted; 4A and 4B are diagrams showing physical quantities and phenomena detectable by the tilt sensor; FIG. FIG. 4 is a diagram showing references for pitch angle, skew angle, and tilt angle; FIG. 4 is a diagram showing hysteresis of pitch angle, skew angle and tilt angle; 5 is a flow chart showing an example of a tuning procedure by a tuning execution unit; FIG. 10 is a diagram showing an example of a user interface screen; FIG. It is a figure which shows an example of the display form of a main body display part.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail based on the drawings. It should be noted that the following description of preferred embodiments is essentially merely illustrative, and is not intended to limit the invention, its applications, or its uses.

FIG. 1 is a diagram schematically showing operation of an optical information reading system S according to an embodiment of the present invention. The optical information reading system S includes an optical information reading device 1A and a PLC 130, but the PLC 130 is not essential. The optical information reader 1A includes a first optical information reader body 1000A and a setting device 100. As shown in FIG. The optical information reading system S may include, for example, a second optical information reading device body 1000B, a third optical information reading device body 1000C, and the like. The number of optical information reader main bodies is not particularly limited, and may be one or an arbitrary plurality of units. In the example shown in FIG. 1, there are three optical information reader main bodies: a first optical information reader main body 1000A, a second optical information reader main body 1000B, and a third optical information reader main body 1000C.

The setting device 100 can use a general-purpose or dedicated computer, portable terminal, or the like, and includes a display device 101 such as a liquid crystal display, a keyboard 102, a mouse 103, a communication unit 104, a control unit 105, and a storage unit 106. I have. A keyboard 102 and a mouse 103 are operation devices for a user to operate the setting device 100 . By operating the keyboard 102 and the mouse 103, it is possible to input arbitrary numbers and perform various settings. The communication unit 104 is connected to the network N and configured to be able to communicate with the first to third optical information reader main bodies 1000A, 1000B, and 1000C. The storage unit 106 stores an operation program of the optical information reading system S, photographing conditions, reading conditions, code images, reading results, and the like. Various types of information can be stored in the first to third optical information reader main bodies 1000A, 1000B, and 1000C and browsed by the setting device 100 without being limited to this configuration.

In the example shown in FIG. 1, a plurality of works W are conveyed in the direction of arrow Y in FIG. The work W is, for example, an article such as luggage, merchandise, various parts, electric products, electronic equipment, etc. In the feeding direction of the belt conveyor B, the first process is performed on the work W at the most upstream, and the same work W is performed at the intermediate part. The second process is performed on W, and the third process is performed on the same work W at the most downstream side. In each process, for example, printing, pasting, attachment of parts, etc., various processing, painting, adjustment, etc. are performed.

A first optical information reading device main body 1000A is installed at a location separated upward from the work W placed on the belt conveyor B in the first step. The first optical information reader main body 1000A can photograph the code given to the work W, decode the code contained in the code image obtained by photographing, and read various information (character string data). is configured as Further, a second optical information reading apparatus main body 1000B is installed at a position spaced upward from the workpiece W placed on the belt conveyor B in the second step, and further placed on the belt conveyor B in the third step. A third optical information reading apparatus main body 1000C is installed at a location spaced upward from the work W placed thereon. The first to third optical information reader bodies 1000A, 1000B and 1000C are the same.

In the example shown in FIG. 1, the first to third optical information reader bodies 1000A, 1000B, and 1000C are stationary (fixed). When operating the stationary first to third optical information reader main bodies 1000A, 1000B, and 1000C, brackets and the like (not shown) are used to prevent the first to third optical information reader main bodies 1000A, 1000B, and 1000C from moving. to be used. The stationary first to third optical information reader main bodies 1000A, 1000B, and 1000C may be used while being held by a robot (not shown). Also, the code of the work W in a stationary state may be read by the first to third optical information reader bodies 1000A, 1000B, and 1000C. The operation of the stationary first to third optical information reader main bodies 1000A, 1000B, and 1000C means that the code of the work W transported by the transport belt conveyor B is sequentially read.

The first to third steps may be performed on the same belt conveyor B, some steps may be performed on another belt conveyor (not shown), and all steps may be performed on different belt conveyors. You can go with The work W may be transported by a transport device (not shown) other than the belt conveyor B. The first to third steps may be performed in the same factory or in different factories. The number of steps is not limited to three, and may be one step. Further, the above process may be a transport process for simply transporting the workpiece W.

A code is given to a part of the outer surface of each work W at a position that can be imaged from above. Codes include both barcodes and two-dimensional codes. Examples of two-dimensional codes include QR code (registered trademark), micro QR code, data matrix (Data code), Veri code, Aztec code, PDF417, and Maxi code. and so on. There are stack type and matrix type two-dimensional codes, but this embodiment can be applied to any two-dimensional code. The code may be assigned by printing or stamping directly on the work W, or may be attached to the work W after being printed on a label.

(Reading start trigger signal)
The first to third optical information reader bodies 1000A, 1000B, and 1000C are wired to a programmable logic controller (PLC) 130 via a signal line 130a. A communication module may be built in the reader main bodies 1000A, 1000B, 1000C, and PLC 130, and the first to third optical information reader main bodies 1000A, 1000B, 1000C, and PLC 130 may be wirelessly connected. The PLC 130 is a control device for sequence-controlling the transport belt conveyor B and the first to third optical information reader main bodies 1000A, 1000B, and 1000C, and a general-purpose PLC can be used.

During operation, the first to third optical information reader bodies 1000A, 1000B, and 1000C each receive a read start trigger signal that defines the start timing of code reading from the PLC 130 via the signal line 130a. Then, the first to third optical information reader main bodies 1000A, 1000B, and 1000C perform code image acquisition and decoding processing based on this reading start trigger signal. After that, the reading result is transmitted to the PLC 130 via the signal line 130a. In this way, when operating the first to third optical information reader main bodies 1000A, 1000B, and 1000C, between the first to third optical information reader main bodies 1000A, 1000B, and 1000C and an external control device such as the PLC 130, Input of the reading start trigger signal and output of the decoding result are repeatedly performed via the signal line 130a. It should be noted that the input of the read start trigger signal and the output of the read result may be performed via the signal line 130a between the first to third optical information reader main bodies 1000A, 1000B, 1000C and the PLC 130 as described above. Alternatively, it may be performed via other signal lines (not shown). For example, a sensor for detecting the arrival of the workpiece W is directly connected to the first to third optical information reader main bodies 1000A, 1000B, and 1000C, and the sensors are connected to the first to third optical information reader main bodies 1000A. , 1000B, and 1000C.

(Configuration of optical information reader)
The configuration of the optical information reader 1A will be described in detail below. FIG. 2 is a block diagram of the optical information reader 1A. 3 to 6 are diagrams showing the appearance of the first optical information reader main body 1000A. The first optical information reader main body 1000A includes a housing 2, an illumination section 4, a camera 5, and a processor 20. As shown in FIG. The illumination unit 4 is a portion that illuminates the workpiece W, and the camera 5 is a portion that captures an image of the workpiece W to which the code is assigned while being illuminated by the illumination unit 4, and obtains a code image including the code. be. The decoding unit 22 of the processor 20 is an example of decoding means for decoding the code image acquired by the camera 5 .

In the description of this embodiment, as shown in FIGS. 3 to 6, top and bottom, left and right, and front and back of the first optical information reader main body 1000A are defined respectively, but this is only for convenience of description, and the first The orientation of the optical information reader body 1000A during use is not limited. That is, as shown in FIG. 1, the front surface (front) of the first optical information reader main body 1000A faces downward and the rear surface (rear surface) faces upward. It is possible to install and use the front surface of the main body 1000A facing upward, or to install and use the front surface of the first optical information reader main body 1000A in an inclined state. Further, the horizontal direction of the first optical information reader body 1000A can also be called the width direction.

As shown in FIGS. 3 to 6, the housing 2 has a substantially rectangular box shape elongated in the vertical direction, and has at least a front surface 2a, a rear surface 2b, a left side 2c, a right side 2d, an upper surface 2e, and a lower surface 2f. are doing.

A camera 5 is provided within the housing 2 . As shown in FIG. 2, the camera 5 includes an imaging device 5a for imaging the code illuminated by the illumination unit 4, an optical system 5b having a lens and the like, and an AF module (autofocus module) 5c. . The light reflected from the portion of the workpiece W to which the code is assigned enters the optical system 5b. The imaging device 5a is an image sensor comprising a light-receiving device such as a CCD (charge-coupled device) or CMOS (complementary metal oxide semiconductor) that converts a code image obtained through the optical system 5b into an electric signal. The image sensor 5 a is connected to a processor 20 , and the electrical signal converted by the image sensor 5 a is input to the processor 20 . The AF module 5c is a mechanism that performs focusing by changing the position and refractive index of a focusing lens among the lenses that make up the optical system 5b. The AF module 5 c is also connected to and controlled by the processor 20 .

As shown in FIG. 2, the lighting section 4 has a first light emitting element 4a, a second light emitting element 4b, and a third light emitting element 4c. Each of the light emitting elements 4a, 4b, 4c is composed of, for example, a light emitting diode.

As shown in FIGS. 3 and 4, on the front surface 2a of the housing 2, a translucent plate 52 arranged in front of the first light emitting element 4a and a diffusion plate 51 arranged in front of the second light emitting element 4b. and a polarizing plate 50 arranged in front of the third light emitting element 4c. The light-transmitting plate 52 is, for example, a colorless and transparent plate that does not have a polarizing effect and a diffusing effect. The diffuser plate 51 is a light-transmitting plate having fine grains formed on its surface or the like, and diffuses and emits incident light. The polarizing plate 50 is a plate having a polarizing effect.

The first optical information reader main body 1000A includes an aimer 10 composed of a light-emitting body such as a light-emitting diode. This aimer 10 is for indicating the field of view of the camera 5 and the position of the optical axis of the illumination section 4 by irradiating light toward the front of the first optical information reading device main body 1000A. The user can also set the first optical information reader main body 1000A by referring to the light (aimer light) emitted from the aimer 10 .

In this embodiment, an example in which the polarizing plate 50, the diffusing plate 51, and the translucent plate 52 are fixed to the front surface 2a of the housing 2 has been described. At least one of the plates 52 may be detachably attached to the housing 2 . Although not shown, for example, at least one of the polarizing plate 50, the diffusion plate 51, and the translucent plate 52 and a frame are integrated into an attachment, and the frame is attached to the front surface 2a of the housing 2, for example It can also be attached using a claw fitting structure or a fastening and fixing structure using screws or the like. In this case, at least one of the polarizing plate 50, the diffusion plate 51, and the translucent plate 52 can be attached or detached as required. The attachment may have only the diffusing plate 51 , may have only the polarizing plate 50 , or may have the diffusing plate 51 and the polarizing plate 50 .

(Lighting controller)
As shown in FIG. 2, the first light emitting element 4a, the second light emitting element 4b, and the third light emitting element 4c are connected to a processor 20 and controlled by a lighting controller 21 configured by the processor 20. FIG. The illumination control unit 21 controls the illumination unit 4 so that the light emitting elements of the other illumination light emitting elements 4a and 4c are not illuminated when the light emitting element of the second light emitting element 4b is illuminated. Controlling the illumination unit 4 so as not to illuminate the light emitting elements of the other illumination light emitting elements 4b and 4c when the light emitting elements are illuminated, and controlling the other illumination light emission when the light emitting element of the third light emitting element 4c is illuminated. It is possible to control the lighting unit 4 so as not to light the light emitting elements of the elements 4a and 4b. That is, the illumination control unit 21 is configured to switch between direct light (light transmitted through the transparent plate 52), diffused light, and polarized light to irradiate the code. Also, in the case of a workpiece W that does not require diffused light, a high-contrast code image can be obtained by irradiating the code with a large amount of light by switching to direct light. A high-contrast code image can also be obtained by switching to polarized light as needed. Moreover, a large amount of light can be obtained by turning on all the light emitting elements of the first light emitting element 4a, the second light emitting element 4b, and the third light emitting element 4c. Therefore, the range of the work W that can be read is expanded.

(decode processing)
A decoder 22 is configured by the processor 20 . The decoding unit 22 irradiates the code with the light from the first light emitting element 4a through the transparent plate 52, and the code image obtained by the camera 5 and the light from the second light emitting element 4b through the diffuser plate 51 are converted into the code image. a code image acquired by the camera 5 by irradiating the light from the third light emitting element 4c through the polarizing plate 50 onto the code and acquired by the camera 5, the first light emitting element 4a and the second light emitting element 4b and the code image obtained by irradiating light from the third light emitting element 4c is decoded. The code image is stored in the image data storage section 30a of the storage section 30 shown in FIG.

The decoding unit 22 performs image processing such as various image processing filters before decoding the code image. After that, when decoding, conventionally known tables can be used. Furthermore, the decoding unit 22 checks whether the decoded result is correct according to a predetermined check method. If an error is found in the data, correct data is calculated using the error correction function. The error correction function differs depending on the type of code. The decoding unit 22 causes the decoding result storage unit 30b of the storage unit 30 to store the decoding result obtained by decoding the code.

(Body display)
As shown in FIG. 5, a body display section 6 is provided on the upper surface 2e of the housing 2. As shown in FIG. The main display unit 6 is composed of, for example, an organic EL display, a liquid crystal display, or the like. As shown in FIG. 2, the body display section 6 is connected to the processor 20 . The body display unit 6 can display, for example, a code image captured by the camera 5, a character string resulting from decoding the code image, a reading success rate, a matching level, angle information of the optical information reading device body 1000A, and the like. can.

The reading success rate is the average reading success rate when the reading process is executed multiple times. The matching level is a reading margin indicating how easily a successfully decoded code can be read. This can be obtained from the number of error corrections that occur during decoding, and can be represented by a numerical value, for example. The fewer error corrections, the higher the matching level (read margin), while the more error corrections, the lower the matching level. Also, the angle information of the optical information reader main body 1000A will be described later.

(Manual operation button)
A select button 11 and an enter button 12 are provided on the upper surface 2e of the housing 2 to be used when setting the first optical information reader main body 1000A. The select button 11 and the enter button 12 are connected to the processor 20 so that the processor 20 can detect the operating states of the select button 11 and the enter button 12 . The select button 11 is a button operated when selecting one of a plurality of options displayed on the main body display section 6 . The enter button 12 is a button operated when confirming the result selected with the select button 11 .

(indicator)
An indicator 9 is also provided on the upper surface 2 e of the housing 2 . The indicator 9 is connected to the processor 20 and can consist of a light emitter such as a light emitting diode. The operation state of the first optical information reader main body 1000A can be notified to the outside by the lighting state of the indicator 9. FIG. For example, if the first optical information reader main body 1000A has successfully read the code image, the indicator 9 lights up in green. 9 is lit in red, etc., and is controllable.

(connector)
A rotating connector 60 is provided at the bottom of the housing 2 . The rotary connector 60 is attached to the body portion of the housing 2 so as to be rotatable around the center line L3 shown in FIG. The rotary connector 60 is provided with a power connector 7 to which power wiring for supplying power to the optical information reader 1A is connected, and an Ethernet connector 8 to be connected to the setting device 100 and the PLC 130 . Note that the Ethernet standard is an example, and signal lines of standards other than the Ethernet standard can also be used.

By rotating the rotating connector 60, the power connector 7 and the Ethernet connector 8 project downward from the housing 2 as shown in FIGS. can be switched to a posture in which it protrudes rearward from the housing 2 . The power connector 7 and the Ethernet connector 8 can be protruded in desired directions by rotating the rotary connector 60 according to the installation location of the optical information reader 1A.

(Models without a connector rotation mechanism)
In the above embodiment, the rotating connector 60 is mounted, but the present invention is not limited to this, and can also be applied to cases where the rotating connector 60 is not mounted, as shown in FIGS. 7 to 9, for example. be able to. In the examples shown in FIGS. 7 to 9, the power connector 7 and the Ethernet connector 8 protrude downward from the bottom surface 2f of the housing 2, and their protruding directions are fixed.

(Configuration of communication unit 32)
The first optical information reader body 1000A has a communication section 32 . The communication unit 32 is a part that communicates with the setting device 100 and the PLC 130 . The communication unit 32 may have a web server function, an I/O unit connected to the setting device 100 and the PLC 130, a serial communication unit such as RS232C, and a network communication unit such as wireless LAN or wired LAN. You may have

(Tilt sensor)
The first optical information reader body 1000A has a tilt sensor 40 capable of outputting a value indicating the tilt of the first optical information reader body 1000A with respect to the horizontal direction or the gravitational direction. A value output from the tilt sensor 40 is input to the processor 20 . The tilt sensor 40 of this embodiment is, for example, an acceleration sensor, and is configured to output a value indicating the tilt of the first optical information reader body 1000A with respect to the direction of gravity. The tilt sensor 40 can be calibrated to correct the offset and gain. For example, gain and offset can be corrected by calibrating in both directions of −1 g and +1 g for each of the x, y, and z gravitational acceleration directions.

In this embodiment, since the first optical information reader main body 1000A has a shape elongated in the vertical direction, the long axis direction of the first optical information reader main body 1000A is the vertical direction (longitudinal direction), and the short axis direction is the vertical direction. is the left-right direction (horizontal direction). Based on this assumption, as shown in FIGS. 3 to 5, the tilt directions of the first optical information reader main body 1000A are defined as pitch, skew, and tilt. The pitch is the rotation of the first optical information reader main body 1000A around the long axis, the skew is the rotation of the first optical information reader main body 1000A around the short axis, and the tilt is the rotation of the first optical information reader main body 1000A. This is rotation about an axis extending in the front-rear direction of the information reading apparatus main body 1000A.

Since the first optical information reader main body 1000A is often used in a vertical orientation (a direction in which the long axis extends in the vertical direction), it would be sufficient if the skew angle could be mainly detected and presented to the user. To obtain , both the skew angle and the pitch angle may be detected and presented to the user. Alternatively, three of the skew angle, pitch angle, and tilt angle may be detected and presented to the user.

Since the tilt sensor 40 is an acceleration sensor, it detects an angle (absolute angle) formed with the direction of gravity. angle may be required. As a method for calculating this relative angle, for example, the fact that the code is formed of a rectangle is used, and based on the code image acquired by the camera 5, the geometric deformation of the rectangle is calculated to obtain an image. There is a method of detecting the relative angle by processing, and the relative angle obtained by such a method may be presented to the user.

However, the method of calculating the geometric deformation has a high computational load, so the processing may take a long time. In this embodiment, as another method, without calculating the relative angle between the code and the first optical information reader main body 1000A, other optical information reading is performed with respect to the target first optical information reader main body 1000A. It is possible to present to the user how the device bodies 1000B and 1000C are installed so that they can be compared. As a result, while reducing the calculation load, the user can easily grasp the differences in the installation parameters between the target first optical information reader main body 1000A and the other optical information reader main bodies 1000B and 1000C.

The tilt sensor 40 is, for example, a detection system using MEMS (Micro Electro Mechanical Systems), but is not limited to this, and may be any sensor capable of sampling acceleration at predetermined time intervals. In the case of the MEMS detection method, since an element sensitive to vibration is used, measures against vibration are taken in this embodiment.

That is, as shown in FIG. 10, the tilt sensor 40 is mounted on a substrate 43 made of resin. The substrate 43 is formed with first to fifth screw holes 43a to 43e, through which screws for fastening and fixing to the housing 2 are inserted, at intervals. The number of screw holes is not particularly limited. The substrate 43 may vibrate more easily than the metal housing 2, but since the vicinity of the first to fifth screw holes 43a to 43e is a portion fixed to the housing 2 by screws, It is a portion that is relatively hard to vibrate. The mounting position of the tilt sensor 40 on the substrate 43 is a portion of the substrate 43 that is less likely to vibrate. In particular, by mounting the tilt sensor 40 between the first screw hole 43a and the fifth screw hole 43e, the tilt sensor 40 is more resistant to vibration.

The tilt sensor 40 may be configured by a sensor other than the acceleration sensor described above, such as a tilt sensor that calculates the tilt angle from the horizontal value. Further, the tilt sensor 40 is configured, for example, to calculate the geometrical deformation of the quadrangle of the code based on the code image acquired by the camera 5 and detect the relative angle to the code by image processing. Alternatively, the angle relative to the surface of the workpiece W can be detected by calculating the geometric deformation of the aimer light based on the image including the aimer light acquired by the camera 5 and performing image processing. It may be a sensor configured to.

11A and 11B are diagrams showing physical quantities and phenomena that can be detected by the tilt sensor 40. FIG. As shown in this figure, the tilt sensor 40 can detect gravity, vibration/movement, and impact. It is possible to detect the orientation and inclination of the first optical information reader main body 1000A based on gravity. Vibration detection, motion detection, and free fall detection of the first optical information reader main body 1000A are possible based on the vibration/movement. Also, based on the impact, it is possible to detect the impact acting on the first optical information reader main body 1000A.

A place where the first optical information reader main body 1000A is installed is a place where the work W is transported, and vibration is always generated. Assuming that the tilt sensor 40 is placed in an environment where vibration occurs, the tilt sensor 40 is configured to be able to perform sampling for minimizing the effects of vibration.

Specifically, the values continuously output from the tilt sensor 40 are sampled once every 0.05 to 0.02 seconds, for example. After converting the sampled value to an angle, it is output through a low-pass filter. The angle output from the low-pass filter becomes the angle information of the first optical information reader main body 1000A. Considering the frequency of vibration generated in the place where the first optical information reader main body 1000A is installed, the time constant of the low-pass filter is set to about 0.5 seconds to 1 second to minimize the influence of vibration. sufficient filter effect can be obtained.

In addition, when it is assumed that the first optical information reader main body 1000A is used in a fixed state, the angle of the first optical information reader main body 1000A is almost constant during operation. . When the angle changes, for example, when an object collides with the first optical information reader main body 1000A, or when a screw or the like fixing the first optical information reader main body 1000A is loosened. As long as it can be detected, the time constant of the low-pass filter may be set longer.

In addition, although the time constant of the low-pass filter is fixed in this embodiment, the configuration is not limited to this, and the time constant of the low-pass filter may be changed according to the mode of operation of the first optical information reader main body 1000A. In addition, when setting, there are cases where it is installed while looking at the angle, and in such cases, a certain degree of quick response is required, so the time constant of the low-pass filter can be set to about 0.5 seconds to 1 second. can.

The positions of the origin (0°) of the pitch angle, skew angle and tilt angle obtained based on the values output from the tilt sensor 40 are 0° and 359° when the first optical information reader main body 1000A makes one revolution. There is a risk that the value will vary with degrees and that it will be difficult for the user to use. On the other hand, in this embodiment, as shown in FIG. 12, the origins of the pitch angle, skew angle, and tilt angle are oriented in a direction that is rarely used.

A specific description will be given below. The origin of the pitch angle is the angle when the rear surface 2b of the housing 2 faces directly downward, that is, when the front surface 2a of the housing 2 faces directly upward, and the pitch angle when the front surface 2a of the housing 2 faces directly downward. is 180°. The origin of the skew angle is the angle when the rear surface 2b of the housing 2 faces directly downward, that is, when the front surface 2a of the housing 2 faces directly upward. The skew angle is 180°. The origin of the tilt angle is the angle when the upper surface 2e of the housing 2 faces directly downward, that is, when the lower surface 2f of the housing 2 faces directly upward. is 180°.

Also, the hysteresis shown in FIG. 13 is provided so that the pitch angle, skew angle, and tilt angle obtained based on the values output from the tilt sensor 40 do not become unstable between 0° and 359°. It enables stable output. Hysteresis can be, for example, plus or minus 5 degrees.

(distance sensor)
As shown in FIG. 2, the first optical information reader main body 1000A has a distance sensor 41 capable of outputting a value indicating the distance between the optical information reader main body 1000A and the work W. As shown in FIG. A value output from the distance sensor 41 is input to the processor 20 . The distance sensor 41 acquires the number of steps of the motor of the AF module 5c, and calculates a value indicating the distance between the optical information reader main body 1000A and the work W based on the number of steps. Since the AF module 5c drives the optical system 5b so as to bring the coded surface of the work W into focus, the number of steps of the motor of the AF module 5c and the number of steps of the optical information reader main body 1000A and the work By acquiring in advance the relationship between W and the distance, the above distance can be calculated from the number of steps when the focus is achieved.

Further, the distance sensor 41 is a so-called TOF (Time Of Flight) sensor that irradiates an object to be measured with light for measurement, receives light reflected from the object to be measured, and measures the distance from the object to be measured. There may be. Further, the distance sensor 41 may measure the distance by image processing an image including aimer light. In this case, the distance can be calculated using the principle of triangulation using the camera 5 and aimer light. Further, the distance sensor 41 can also be configured by a measuring device or the like capable of triangulation. Further, when the optical system 5b has a liquid lens, the distance sensor 41 can acquire the voltage value of the liquid lens and calculate the value indicating the distance based on the acquired voltage value. This utilizes the fact that the curvature of the liquid lens changes in proportion to the voltage, and the above distance can be calculated from the voltage value applied to the lens when the work W is in focus. Further, the distance sensor 41 may calculate the distance based on the size of the code image obtained by the camera 5 when the size of the code given to the work W is known.

(tuning)
A tuning execution unit 23 is configured by the processor 20 shown in FIG. After activating the AF module 5c to perform focusing, the tuning execution unit 23 changes the photographing conditions of the camera 5, the decoding conditions of the decoding process, etc., repeats the photographing of the code and the decoding process, and adjusts each photographing condition and Based on the matching level indicating the readability of the code (decoding margin) calculated under the decoding conditions, a tuning process for determining the optimum shooting conditions and decoding conditions is executed. For example, when the optical information reader 1A is set, the tuning execution unit 23 sets shooting conditions such as the gain of the camera 5, the amount of light of the illumination unit 4, illumination switching (switching between direct light, diffused light, and polarized light), and exposure time. , a portion for setting various conditions (tuning parameters) so as to change the image processing conditions and obtain conditions suitable for decoding. The image processing conditions include image processing filter coefficients (strength of filter) for the code image before decoding, switching of image processing filters when there are multiple image processing filters, combination of different types of image processing filters, and the like. . Appropriate photographing conditions and image processing conditions differ depending on the influence of external light on the workpiece W during transportation, the color and material of the surface to which the code is attached, and the like. Therefore, the tuning execution unit 23 searches for more appropriate imaging conditions and image processing conditions and sets the above conditions. The shooting condition is an example of shooting information when the code image is acquired.

Specifically, as shown in the flowchart of FIG. 14, in step SB1 after the start, the tuning execution unit 23 controls the illumination unit 4 and the camera 5 to cause the camera 5 to generate a code image, and the tuning execution unit 23 Get the code image. At this time, decoding processing parameters relating to presence or absence and type of image processing filter to be executed before decoding processing, illumination conditions, photographing conditions, etc. are set to arbitrary parameters. Next, in step SB2, the tuning executing section 23 causes the decoding section 22 to perform decoding processing on the obtained code image.

After the decoding process, the process proceeds to step SB3, and the tuning executing section 23 determines whether or not the decoding process of step SB2 was successful. If NO is determined in step SB3 and the decoding process in step SB2 fails, that is, if the code cannot be read, the process advances to step SB4 to change the decoding process parameter to another parameter. Execute the decoding process again. If the decoding process fails with all the decoding process parameters, this flow is ended and the user is notified.

On the other hand, if the determination in step SB3 is YES and the decoding process in step SB2 succeeds, the process proceeds to step SB5, where the tuning execution unit 23 evaluates the reading margin based on the result of the decoding process, and temporarily stores it. back.

At Step SB6, it is determined whether or not the decoding process has been completed with all the decoding process parameters. If NO is determined in step SB6, and the execution of the decoding process has not been completed with all the decoding process parameters, the process proceeds to step SB7, where the decoding process parameters are changed to other parameters and the decoding process is performed.

On the other hand, when it is judged as YES in step SB7 and execution of the decoding process is completed with all the decoding process parameters, the process proceeds to step SB8. At step SB8, the tuning execution unit 23 selects the decoding process parameter with the highest reading margin from all the decoding process parameters, and determines the selected decoding process parameter as the parameter to be applied during operation.

In the tuning process, lighting conditions are also set to appropriate conditions. That is, it is possible to set which of the first to third light emitting elements 4a, 4b, and 4c of the illumination section 4 is to be used when the optical information reader 1A is operated. The light emitting element to be used may be set by tuning as described above, or may be set so as to be a light emitting element selected by the user. For example, a user interface capable of selecting the first to third light emitting elements 4a, 4b, and 4c is generated and displayed on the display 101, and the user operates the keyboard 102 and the mouse 103 to select the desired light emitting element. For example, the selection result can be reflected at the time of operation.

A parameter set is a set of parameters constituting various conditions set as a result of tuning performed by the tuning execution unit 23 and various conditions set by the user. This parameter set is also the reading condition applied when decoding the code image. A parameter set can also be referred to as a bank, and in this embodiment multiple variations of the parameter set can be stored. The reading conditions applied when decoding the code image and the read data are associated and stored in the parameter set storage section 30c.

This optical information reader 1A is configured to be able to switch from one parameter set to another among a plurality of parameter sets stored in the parameter set storage section 30c. The switching of parameter sets can be performed by the user, or can be configured to be performed by a switching signal from an external control device such as the PLC 130 or the like. When the user switches the parameter set, the setting device 100 and the operation buttons 11 and 12 are operated. The selected parameter set is used during operation of the optical information reader 1A, and the unselected parameter set is not used during operation of the optical information reader 1A. That is, it is possible to switch from one parameter set to another.

(display)
Various user interface screens can be displayed on the display device 101 . Various user interface screens can be generated by the control unit 105 of the setting device 100, for example.

FIG. 15 shows an example of a user interface screen 300 displayed on the display 101. As shown in FIG. The user interface screen 300 extracts records having the same read data from a plurality of optical information reader bodies 1000A, 1000B, and 1000C (readers 1000A, 1000B, and 1000C for simplicity in the figure, respectively), and extracts a code image and a This is a screen for displaying reading time, various conditions, and the like. A header portion 301 of the user interface screen 300 allows filter/search condition setting, and is provided with a filter setting area 301a, a search setting area 301b, a reader selection area 301c, and a period designation area 301d. In the filter setting area 301a, conditions for selecting targets (display targets) to be displayed on the user interface screen 300 from a large number of records are set. is possible. Errors are records that were unreadable or failed to read. In the search setting area 301b, it is possible to set conditions for searching records having specified read data from among the records to be displayed. In the period designation area 301d, it is possible to designate a period for extracting display targets.

In the reader selection area 301c, the optical information reader main body displayed under the header section 301 is selected from a plurality of optical information reader main bodies 1000A, 1000B, and 1000C. For example, the first to third optical information reader bodies 1000A, 1000B, and 1000C existing on the same network N are searched, and the IP addresses of the searched optical information reader bodies are acquired. When the user operates the reader selection area 301c to select one of the first to third optical information reader main bodies 1000A, 1000B, and 1000C, the control unit 105 detects the selection operation, Optical information reader main bodies 1000A, 1000B, and 1000C are selected.

A reader display area 302 and a record display area 303 for displaying a list of read data are provided below the header portion 301 of the user interface screen 300 . Information of the selected optical information reader main bodies 1000A, 1000B, and 1000C is displayed in the reader display area 302 . In this example, the first to third optical information reader bodies 1000A, 1000B, and 1000C are displayed, but only one can be displayed if only one is selected. In the reader display area 302, as information of the optical information reader main body, the name and model for specifying the optical information reader main body, illustrations and photographs showing the appearance of the optical information reader main body, etc. are displayed. 302a is provided, and the control unit 105 displays the information of the selected optical information reader main body in the first area 302a. Since it is possible to distinguish the type and the like from the appearance of the optical information reader main body, it is easy to know which type of optical information reader main body is installed in which process.

The external view of the main body of the optical information reader displayed in the first area 302a is provided with a portion imitating the indicator 9, ie, an indicator portion 9A. An indicator portion 9A in the external view is a portion that displays success/failure information indicating whether or not the decoding was successful. That is, each of the first to third optical information reader main bodies 1000A, 1000B, and 1000C is configured to be capable of outputting success/failure information indicating whether or not decoding has succeeded to the setting device 100. FIG. When the setting device 100 receives the success/failure information output from the first to third optical information reader main bodies 1000A, 1000B, and 1000C, the setting device 100 changes the color of the indicator section 9A, thereby changing the color of the first to third optical information reader. It displays which device main body among the main bodies 1000A, 1000B, and 1000C has successfully decoded, or which device main body has failed to decode. FIG. 15 shows that decoding is successful in the first optical information reader main body 1000A having the indicator portion 9A of black color, and the second and third optical information reading device main bodies 1000A having the indicator portion 9A of white color. Decoding has failed in the optical information reader main bodies 1000B and 1000C.

Further, the reader display area 302 is provided with a second area 302b in which code images captured by the optical information reader main bodies 1000A, 1000B, and 1000C are displayed. The first area 302a and the second area 302b are arranged vertically. That is, the success/failure information output from the first to third optical information reader bodies 1000A, 1000B, and 1000C are displayed on the display 101 in association with the code image. The success/failure information may be displayed using characters, symbols, icons, or the like.

The long axis direction of the optical information reader main bodies 1000A, 1000B, and 1000C corresponds to the Y-axis direction (vertical direction) of the code image displayed in the second area 302b, and the short axis direction of the optical information reader main bodies 1000A, 1000B, and 1000C. The axial direction corresponds to the X-axis direction (vertical direction) of the code image.

The reader display area 302 is also provided with a third area 302c for displaying a matching level (MLV) and a decoding time (time) when decoded by the main body of the optical information reader.

Below the reader display area 302 are a reading distance display area 304, an installation angle display area 305, a bank information display area 306, an illumination information display area 307, a filter display area 308 for displaying the applied image processing filter, and an applied HDR display area. An HDR display area 309 or the like for displaying the type is provided. Other imaging conditions and reading conditions may be displayed.

The reading distance display area 304 displays the distance (reading distance) between each of the optical information reader bodies 1000A, 1000B, and 1000C and the work W. FIG. The reading distance displayed in the reading distance display area 304 is a distance calculated based on the value output from the distance sensor 41. This is the distance calculated based on the output value. Therefore, the distance does not change unless the setting conditions are changed. Note that the reading distance may be calculated and displayed based on the value output from the distance sensor 41 each time the code image is acquired.

In the reading distance display area 304 of this embodiment, the distance between the first optical information reader main body 1000A and the work W is "300 mm", the distance between the second optical information reader main body 1000B and the work W is "150 mm", and the third The distance "100 mm" between the optical information reader main body 1000C and the work W is displayed. That is, the code image acquired by the camera 5 (the image displayed in the second area 302b) is associated with the distance calculated based on the value output from the distance sensor 41 when the code image was acquired. displayed. As a result, it becomes easier to guess whether the installation distances of the first to third optical information reader main bodies 1000A, 1000B, and 1000C should be increased or decreased during adjustment, and fine adjustment of the distances is facilitated. Become.

An installation angle display area 305 displays an installation angle (skew angle, pitch angle, etc.), which is angle information of the main body of the optical information reader. The installation angles displayed in the installation angle display area 305 are angles calculated based on the values output from the tilt sensor 40. These are angles calculated based on the output values. It should be noted that the time when the camera 5 acquires the code image and the time when the angle is calculated based on the value output from the tilt sensor 40 need not strictly match.

In the installation angle display area 305 of this embodiment, a skew angle of 182° and a pitch angle of 138° of the first optical information reader main body 1000A, a skew angle of 184° and a pitch angle of 134° of the second optical information reader main body 1000B, A skew angle of 176° and a pitch angle of 125° of the third optical information reader body 1000C are displayed. That is, the code image (the image displayed in the second area 302b) acquired by the camera 5 of each of the optical information reader main bodies 1000A, 1000B, and 1000C and the image output from the tilt sensor 40 when the code image was acquired The installation angles calculated based on the values are associated and displayed on one screen so as to be comparable. As a result, it becomes easier to guess in which direction and how much the installation angles of the first to third optical information reader main bodies 1000A, 1000B, and 1000C should be changed, and fine adjustment of the angles becomes easy. The angle can be displayed, for example, in increments of 1°, but is not limited to this, and may be displayed in increments of 5°, for example. Also, since the angle is an absolute angle with respect to the direction of gravity, it is easy for the user to grasp intuitively.

As an example of the display form of the angle information displayed in the installation angle display area 305, the angle information includes a reference line 400, a first schematic diagram 401a and a second schematic diagram 401b imitating the optical information reading apparatus main body 1000A, and a reference line. A display form using an arrow 402 indicating the direction of inclination of each of the schematic diagrams 401 a and 401 b with respect to the line 400 can be employed. A reference line 400 is a line extending in the horizontal direction of the user interface screen 300 and indicates a horizontal plane during operation. The first schematic diagram 401a is a diagram showing the shape of the side surface of the optical information reader main body 1000A, and the second schematic diagram 401b is the diagram showing the shape of the upper surface of the optical information reader main body 1000A. The first schematic diagram 401a and the second schematic diagram 401b may be color diagrams or black-and-white diagrams. The drawing allows the user to intuitively grasp the orientation of the information reading apparatus main body 1000A.

The first schematic diagram 401a is used to indicate the skew angle, and the user can easily understand that the angle formed by the first schematic diagram 401a and the reference line 400 is the skew angle. The second schematic diagram 401b is used to indicate the pitch angle, and allows the user to easily understand that the angle formed by the second schematic diagram 401b and the reference line 400 is the pitch angle. Note that the reference line 400, the schematic diagrams 401a and 401b, and the arrow 402 may be omitted and displayed as "pitch angle" and "skew angle."

In the bank information display area 306, the bank number (parameter set number) that was applied when the camera 5 acquired the code image and that was successfully read is displayed. For example, each of the first to third optical information reading device bodies 1000A, 1000B, and 1000C is configured to be able to output imaging information to the setting device 100 when the code image is acquired. The setting device 100 receives imaging information output from the first to third optical information reader bodies 1000A, 1000B, and 1000C. Then, in the illumination information display area 307, illumination information (an example of imaging information) indicating whether the illumination unit 4 emitted direct light, diffused light, or polarized light when the camera 5 acquired the code image is displayed. be done. Lighting information is information contained in the parameter set. The illumination information displayed in the illumination information display area 307 is associated with the code image. In this figure, the code image acquired by the first optical information reader body 1000A is an image captured with direct light, and the code image acquired by the second optical information reader body 1000B is captured with diffuse light. It can be seen that the code image acquired by the third optical information reader main body 1000C is an image captured with polarized light. Similarly, the applied filter, HDR type, etc. are also displayed in association with the code image.

(Display form of main unit display)
FIG. 16 shows an example of the display form of the body display section 6 of the optical information reading device body 1000A. The body display unit 6 displays angle information of the body of the optical information reader calculated based on the value output from the tilt sensor 40 when the code image was acquired. As an example of the display form of the angle information displayed on the main body display unit 6, the angle information is displayed using a reference line 450 and a schematic diagram 451 imitating the optical information reading apparatus main body 1000A. can be given as an example displayed as a relative positional relationship. A reference line 450 is a line extending in the horizontal direction of the optical information reader main body 1000A, and indicates a horizontal plane during operation. A schematic diagram 451 shows the shape of the upper surface of the optical information reader main body 1000A. When the optical information reading device main body 1000A is tilted with respect to the horizontal plane, the schematic diagram 451 is displayed as if it is tilted with respect to the reference line 450, and the degree of inclination of the optical information reading device main body 1000A with respect to the horizontal plane is The greater the pitch angle (the greater the pitch angle), the greater the inclination of the schematic diagram 451 with respect to the reference line 450 . Also, the schematic diagram 451 moves vertically with respect to the reference line 450 according to the skew angle. The greater the skew angle, the greater the vertical movement of the schematic diagram 451 with respect to the reference line 450 .

The schematic diagram 451 displayed on the main body display unit 6 has a smaller amount of information than the first schematic diagram 401a and the second schematic diagram 401b displayed on the display device 101, that is, the number of colors used is There are few figures, rough figures, figures with simplified shapes, and the like.

The body display portion 6 is provided with two number display areas 6a, 6a for displaying angle information in numbers. A skew angle is displayed in one number display area 6a, and a pitch angle is displayed in the other number display area 6a. Only one of the skew angle and pitch angle may be displayed. Also, the tilt angle may be displayed in the number display area 6a. In other words, the tilt angle of the optical information reader body 1000A with respect to the horizontal plane, the rotation angle of the optical information reader body 1000A about the long axis, and the like can be displayed in the number display area 6a. Also, the reading distance may be displayed on the body display section 6 .

The display form of the main body display section 6 may be different between the setting and the operation. For example, the angle information is displayed on the main display unit 6 at the time of setting, while the angle information is not displayed on the main display unit 6 at the time of operation. That is, the installation angle of the optical information reader main body 1000A is adjusted at the time of setting, and since the installation angle is kept constant once operation is started, there is little need to display the angle information on the main body display unit 6. is.

(support function during installation)
Since the angle information can be displayed on the main body display section 6 of the optical information reader main body 1000A, it is possible to support the adjustment of the installation angle when the optical information reader main body 1000A is installed at the site, for example. When the installation angle of the optical information reader main body 1000A is set in advance by the setting device 100, the optical information reader main body 1000A acquires the installation angle as the target installation angle. After obtaining the target installation angle, the optical information reader main body 1000A can report information regarding the difference between the target installation angle of the optical information reader main body 1000A and the current angle. For example, by displaying the target installation angle and the current angle of the optical information reader main body 1000A on the main body display unit 6 so that they can be compared, the user can be informed of the difference between the target installation angle and the current angle. Information about the difference between the target installation angle and the current angle may be displayed numerically, or may be displayed using a reference line 450 and a schematic diagram 451 . By displaying information about the difference between the target installation angle and the current angle, the user can move the optical information reader main body 1000A so that the current angle approaches the target installation angle. It is easier than adjusting while watching.

For example, the form using the color of the indicator 9 may be used to notify the information about the difference between the target installation angle and the current angle. The closer the current angle is to the target installation angle, the brighter the indicator 9 is or the color of the indicator 9 is switched from one color to another. Further, when the indicator 9 is composed of a large number of light-emitting elements, it is possible to provide a notification mode in which the number of lights of the indicator 9 is increased as the current angle approaches the target installation angle. Also, the closer the current angle approaches the target installation angle, the faster or slower the flashing cycle of the aimer light. It is also possible to set it as the notification form of speeding up or delaying. Further, when the current angle matches the target installation angle, the matching may be displayed on the main body display unit 6 using characters, symbols, or the like. Further, until the current angle matches the target installation angle, the difference between the current angle and the target installation angle may be displayed on the main body display unit 6 as a numerical value, a schematic diagram, or the like.

The reading distance of the optical information reading apparatus main body 1000A can also be adjusted in the same manner as the installation angle. In the case of the distance, the user is notified of information regarding the difference between the reading distance acquired by the distance sensor 41 and the target distance. The notification form can be the notification form using the indicator 9, the aimer light, the lighting unit 4, etc., as described above.

(vibration notification, shock notification, angle change)
As shown in FIG. 11, the tilt sensor 40 is configured to detect vibrations of the optical information reader body 1000A. The processor 20 can notify when the tilt sensor 40 detects the vibration of the optical information reader body 1000A. That is, the detection of vibration by the tilt sensor 40 means that the camera 5 is vibrating, and if the photographing is continued as it is, the code image will be blurred and there is a high possibility that reading will fail. In this case, reading failure can be prevented by notifying the user by notification means such as an alarm when the vibration is detected. The notification means may be, for example, the display 101, the indicator 9, or the like.

In addition, the tilt sensor 40 is configured to be able to detect an impact acting on the optical information reader body 1000A. When the tilt sensor 40 detects an impact acting on the optical information reader body 1000A, the processor 20 stores the date and time when the impact was detected in the date and time storage section 30d of the storage section 30. FIG. By storing the date and time when an impact is detected, it can be used as information when identifying the cause of the deviation of the installation angle of the optical information reader main body 1000A. When the tilt sensor 40 detects an impact, the sampling period should be shortened to, for example, about 0.01 second, and the time constant of the low-pass filter should be shortened.

In addition, when the installation angle of the optical information reader main body 1000A changes from the time of initial installation, the change can be displayed on the display 101 of the setting device 100 or notified using an alarm or the like. By notifying the user early that the installation angle of the optical information reading device main body 1000A has changed, reading failure can be prevented.

(Action and effect of the embodiment)
As described above, according to this embodiment, the angle information of the optical information reading apparatus main body 1000A can be displayed on the display 101 in association with the code image. User can understand. Based on this, it becomes easier to guess which direction and how much the angle of the optical information reader main body 1000A should be changed, and fine adjustment of the angle is facilitated.

Further, since the optical information reading device main body 1000A has a distance sensor 41 capable of outputting a value indicating the distance between the optical information reading device main body 1000A and the work W, the code image and the reading can be displayed in association with the distance. As a result, it becomes easier to guess whether the distance of the optical information reader main body 1000A should be lengthened or shortened, and fine adjustment of the distance is facilitated.

The above-described embodiments are merely examples in all respects and should not be construed in a restrictive manner. Furthermore, all modifications and changes within the equivalent scope of claims are within the scope of the present invention.

As described above, the optical information reader according to the present invention can be used for reading codes such as two-dimensional codes.

1A optical information reader 1000A first optical information reader main body 2 housing 5 camera 6 main body display unit 10 aimer 22 decoding unit (decoding means)
40 tilt sensor 41 distance sensor 101 indicator 400 reference lines 401a, 401b schematic diagram S optical information reading system

Claims (16)

An optical information reading device main body having a camera for photographing a work to which a code is attached and decoding means for decoding the code image obtained by the camera, and a display device for displaying the code image obtained by the camera. In a fixed optical information reader,
The optical information reading device body has a tilt sensor capable of outputting a value indicating the tilt of the optical information reading device body with respect to a horizontal direction or a direction of gravity,
The display unit associates the code image acquired by the camera with angle information of the optical information reading device body calculated based on the value output from the tilt sensor when the code image was acquired. An optical information reader that is displayed on the screen. In the optical information reader according to claim 1,
The optical information reader main body has a distance sensor capable of outputting a value indicating the distance between the optical information reader main body and the work,
Optical information displayed on the display in association with the code image acquired by the camera and the distance calculated based on the value output from the distance sensor when the code image was acquired. reader. The optical information reader according to claim 1 or 2,
An optical information reader, wherein the optical information reader main body is provided with a main body display section for displaying the angle information. In the optical information reader according to claim 3,
Optical information reading in which the angle information is displayed on the main body display unit as a relative positional relationship of the schematic diagram with respect to the reference line using a reference line and a schematic diagram simulating the main body of the optical information reading device. Device. The optical information reader according to claim 3 or 4,
An optical information reader in which the angle information is displayed in numerals on the body display unit. In the optical information reader according to any one of claims 3 to 5,
The optical information reading device in which the angle information is displayed on the main body display unit during setting, while the angle information is not displayed during operation. In the optical information reader according to any one of claims 3 to 6,
The optical information reader, wherein the tilt angle of the optical information reader main body with respect to a horizontal plane is displayed on the main body display section. In the optical information reader according to any one of claims 3 to 7,
An optical information reader in which a rotation angle about a long axis of the optical information reader main body is displayed on the main body display section. The optical information reader according to any one of claims 1 to 8,
An optical information reader in which the angle information is displayed on the display using a reference line, a schematic diagram of the main body of the optical information reader, and an arrow indicating an inclination direction of the schematic diagram with respect to the reference line. . In the optical information reader according to any one of claims 1 to 9,
The optical information reader main body is configured to be capable of outputting success/failure information indicating whether or not the decoding was successful,
An optical information reader in which the success/failure information output from the optical information reader body is displayed on the display in association with the code image. In the optical information reader according to any one of claims 1 to 10,
The optical information reading device main body is configured to be capable of outputting shooting information when the code image is acquired,
An optical information reader in which the photographing information output from the optical information reader body is displayed on the display in association with the code image. The optical information reader according to any one of claims 1 to 11,
The display displays a plurality of code images obtained from the plurality of optical information reading device main bodies and angle information of the optical information reading device main body when each code image is obtained in association with each other. Optical information reader. The optical information reader according to any one of claims 1 to 12,
the tilt sensor is an acceleration sensor and outputs a value indicating the direction of gravity of the optical information reading device body;
The display is an optical information reader that displays, as the angle information, an inclination angle of the optical information reader main body with respect to a direction of gravity. The optical information reader according to any one of claims 1 to 13,
The optical information reader main body is an optical information reader that notifies information about a difference between a target installation angle of the optical information reader main body and a current angle of the optical information reader main body. The optical information reader according to any one of claims 1 to 14,
The tilt sensor is configured to be capable of detecting vibration of the optical information reading device main body,
An optical information reader that notifies when the tilt sensor detects vibration of the optical information reader main body. 16. The optical information reader according to any one of claims 1 to 15,
The tilt sensor is configured to be capable of detecting an impact on the optical information reading device main body,
The optical information reader main body includes a storage unit for storing a date and time when the impact to the optical information reader main body is detected when the tilt sensor detects the impact to the optical information reader main body.

Images