JPH01255366A - Image reader - Google Patents

Abstract

PURPOSE:To allow scanning speed to be proper by providing a scanning speed warning displayer to display the speed-over of scanning speed. CONSTITUTION:A ONE SHOT output 2 of a ONE SHOT(one shot) circuit 4 is set in a time to be essentially necessary for processing image data for 1 line. Consequently, since the output of an AND circuit 5 is made into the AND output 3 of an encoder output pulse 1 and the ONE SHOT output 2, the scanning speed warning displayer 6 is operated based on the output of the AND circuit 5. Namely, when the fact that the scanning speed exceeds a prescribed value and it is made into an abnormal value is detected, a constitution is made so as to display the abnormality caution of the scanning speed. Thus, the abnormal of the scanning speed can be easily recognized by an operator, and the image data can be fetched with good accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image reading device, particularly a handy image scanner device.

[Prior Art] Conventionally, in a handy image scanner device as an image reading Rfi, in order to scan an object and capture image data of the image, output from an encoder attached to a roller part of the handy image scanner device itself is required. The image data is imported based on the .

FIG. 3 is a diagram showing the timing of output of each part to explain the operation of a conventional handy image scanner device.

In the above-mentioned conventional handy image scanner device, the amount of data captured by this handy image scanner device is calculated from the number of built-in sensor elements (not shown) and the number of lines: (number of sensor elements) x (number of lines).
determined by.

Here, the line refers to a sensor element array.

The method for capturing images is to capture one row of image data 8 shown in FIG. 3(b), and then capture the next row of image data IO. In other words, the image data 1o for the next column cannot be captured unless the image data 8 for the - column is processed. In other words, Fig. 3 (C
) The encoder output 9 following the encoder output cuff shown in ) becomes invalid.

Capturing the next line is done using the encoder output as a trigger, so if the scan speed is too fast, the encoder output will occur before one line can be captured, and one line of image data will be invalidated, resulting in incorrect image data. cannot be imported.

[Problem M to be solved by the invention] In the conventional handy image scanner device as described above, whether or not it has been operated at an appropriate scanning speed can be determined by displaying the captured image data on a screen using a display or the like. There was a problem in that it was impossible to judge whether the scanning speed was appropriate unless the image was printed out using a printer or the like.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an image reading device that displays a warning about an abnormality in scan speed using an LED (light emitting diode) or the like.

[Means for Solving the Problems] An image reading device according to the present invention includes a scan speed warning indicator that displays an overspeed of the scan speed. When detected, the scan speed warning display device displays a warning of the scan speed abnormality.

[Function] An image reading device according to the present invention is equipped with a scan speed warning indicator that displays an overspeed of the scan speed, so that when it is detected that the scan speed exceeds a predetermined value and becomes an abnormal value, This can be communicated to the operator using a scan speed warning display, thereby making it possible to optimize the scan speed.

[Embodiment] FIG. 1 is a block diagram showing the configuration of the main parts of a handy image scanner device as an image reading device which is an embodiment of the present invention, and FIG. 2 shows the operation of the handy image scanner device of FIG. 1. FIG. 3 is a diagram showing the timing of output of each section for explanation. In the figure, l is the encoder output pulse from the encoder (not shown), and 2 is O struck by the trailing edge of encoder output pulse 1.
NE 5HoT (One Shot) Circuit 4 (7) ONES
HOT output, 3 is encoder output pulse 1 and ONE
5 is a logical product output of HOT output 2, 5 is an AND circuit, and 6 is a scan speed warning indicator consisting of an LED and the like.

In the above-described handy image scanner device which is an embodiment of the present invention, the encoder output pulse l is set to be ab>cd=de as shown in FIG. Then, the two locations d and e are locations where the scan speed was high. The 0NESHOT output 2 shown in FIG. 2 is the output of the ONE 5HoT circuit 4 when the trailing edge of the encoder output pulse 1 strikes the ONE 5HoT circuit 4.

The ONE 5HoT output 2 of the ONE 5HoT circuit 4 is set to the minimum time required to process 1942 minutes of image data. In this way,
The output of the AND circuit 5 is the AND output 3 of the encoder output pulse 1 and the ONE 5HOT output 2, as shown in Figure 2.
Therefore, the scan speed warning display 6 is operated based on the output of the AND circuit 5, thereby making it possible to warn the operator of the handy image scanner of an abnormality.

In the above embodiment, even if there is a slight abnormality in the interval between the encoder output pulses 1 from the encoder, the pLED lights up as the scan speed warning indicator 6.
By using C (capacitor) and R (resistance) that determine the time of the ONE 5HoT circuit 4 as volumes, the operator (user) can arbitrarily determine the range of malfunction by himself/herself.

In addition, in the above embodiment, if the AND output 3 is held by a flip-flop to light up the LED, the LED will turn on.
The lighting of D becomes easier to recognize. Furthermore, in terms of software, by importing the AND output 3 to the PC side, it is possible to forcibly encourage re-manpower.

[Effects of the Invention] As described above, the image reading device of the present invention is equipped with a scan speed warning indicator that displays an overspeed of the scan speed, and the scan speed exceeds a predetermined value and becomes an abnormal value. When this is detected, the scan speed warning display device is configured to display a warning about the scan speed abnormality, so the operator can easily recognize the scan speed abnormality and can capture image data with extremely high accuracy. This has an excellent effect.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of the main parts of a handy image scanner device as an image reading device which is an embodiment of the present invention, and FIG. 2 is a block diagram showing the operation of the handy image scanner device shown in FIG. 1. FIG. 3 is a diagram showing the output timing of each part for explaining the operation of a conventional handy image scanner device. In the figure, 1... encoder output pulse, 2...
ONE 5HOT output, 3...AND output, 4...
・ONE 5HOT circuit, 5...AND circuit, 6・
...Scan speed warning indicator, 7,9...Encoder output, 8.10...Part of image data. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. 1st Figure 1; Encoder output pulse 5: AND circuit 2: ONE 5HOT mn 5: Sffya73t7t'! Tongue AffiH3: AND output 4: ONE 5HOT times% Figure 2

Claims (1)

[Claims] In an image reading device that reads image data by scanning over a subject, when the time interval of the output pulses of the built-in speed detector becomes shorter than a predetermined value, the scanning speed becomes overspeed. An image reading device comprising a scan speed warning indicator that displays.