JPH03215749A - Conveying speed measuring instrument for paper sheets - Google Patents

Abstract

PURPOSE:To easily measure the conveying speed of paper sheets by calculating the conveying speed by utilizing signals obtained from sensors installed on a conveyance path. CONSTITUTION:The signals from 1st and 2nd sensors 3 and 4 are sent to a measuring instrument main body 7, and a 1st timing detection part 11 inputs the signal from the sensor 3 and detects and sends the rising and falling timing points to a holding part 13 and a speed calculation part 15. The holding part 13 inputs the signal from the sensor 4 and holds the values '1' and '0' of the signals at time t1 and time t2 when the rising and falling timing points are detected. Further, a 2nd timing detection part 12 inputs the signals from the sensors 3 and 4 and detects the timing where the values of those signals become equal to each other. Then an inclination deciding part 14 determines the direction of the inclination of the paper sheets with the values held by the holding part 13 at the timing from the detection part 12. Then the speed calculation part 15 calculates the conveying speed from the time t1-t3 when the sensor 3 is covered with the paper sheets according to the detection timing from the detection part 11.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a device for observing the conveyance state of paper sheets in a device for conveying paper sheets, and particularly to a device for measuring the conveyance speed of paper sheets. Regarding.

[Conventional technology]

Conventionally, the conveyance speed in paper sheet conveyance devices has been measured by actually measuring the rotation speed of the motor that drives the conveyance path, regardless of the state of the paper sheets that are actually being conveyed. [Problems to be solved] The conventional measurement method described above requires a tachometer to measure the number of rotations of the motor, and there are measurement points that cannot be measured with a tachometer. The disadvantage is that it cannot be done.

In addition, when paper sheets are conveyed while sliding on the conveyance path, the conveyance speed of paper sheets calculated from the rotation speed of the motor,
There is a drawback that the actual conveyance speed is different.

An object of the present invention is to eliminate the above-mentioned drawbacks and provide a measuring device that can measure the transport speed of paper sheets with high accuracy.

[Means to solve the problem]

The paper sheet conveyance speed measuring device of the present invention detects the time during which the paper sheet covers the sensor based on a sensor installed in the conveyance path of a device that conveys paper sheets and a signal from the sensor. It has a measuring section that measures the conveying speed, and a means to improve the accuracy of calculating the conveying speed by detecting data that deviates from a certain specified value due to overlapping or inclination of paper sheets being conveyed during measurement in the measuring section. There is.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a functional block diagram showing one embodiment of the measuring device of the present invention, and FIG. 2 is a diagram showing the measuring device of FIG. 1 installed on a conveyance path.

The first and second sensors 3,
Install 4 side by side. These sensors 3 and 4 are connected to the measuring device main body 7 by a signal line 5.6. Sensor 3, 4
is a sensor that generates a signal "0" when covered by the paper sheet 2, and generates a signal "1" at other times.

The measuring device includes a first timing detection section 11 inside the main body.
, a second timing detection section 12, a holding section 13, an inclination determining section 14, and a speed calculating section 15.

The first timing detection section 11 detects the timing of the rise or fall of the signal from the first sensor 3.

The second timing detection unit 12 detects the timing when the value of the signal from the first sensor 3 and the value of the signal from the second sensor 4 become equal.

The holding unit 13 holds the value of the signal of the second sensor 4 at the time of detection by the first timing detection unit 11.

The inclination determination unit 14 determines the inclination of the paper sheet 2 based on the value held in the holding unit 13 at the time of detection by the second timing detection unit 12.

The speed calculation section 15 calculates the conveyance speed of the paper sheet 2 based on the signals from the first timing detection section 11 and the inclination determination section 14 .

Next, the operation of this embodiment will be explained. It is assumed that the paper sheet 2 transported by the transport path 1 has a rectangular shape, and a state with no inclination means that the two opposing sides of the rectangle are perpendicular to the transport direction. It means the state where it is located. Then, speed calculation section 1
It is assumed that 5 is given in advance the value of the width in the conveying direction of the rectangular shape.

Now, suppose that the paper sheet 2 is being conveyed by the conveyance path 1 in a state tilted to the left as shown in FIG. 2. When the paper sheet 2 passes through the sensors 3 and 4, 4 outputs the signal shown in FIG. That is, the first sensor 3
The signal obtained from the signal falls from "1" to "0" at time t1, and rises from "0" to "1" at time t3. On the other hand, the signal obtained from the second sensor 4 falls from "1" to "0" at time t2, and rises from "0" to "1" at time t4. The fall of the signal occurs when paper sheets begin to cover the sensor.
The rising edge of the signal indicates the timing when the paper sheet has finished passing through the sensor. Further, the deviation between time 1+ and t2 and the deviation between time t3 and t4 indicate the time at which the signal is deviated due to the inclination of the paper sheet.

Signals from these sensors are transmitted via signal lines 5.6 to the first
It is sent to the main body of the measuring device shown in the figure. The first timing detection unit 11 receives the signal from the first sensor 3, detects the falling timing and the rising timing, and
It is sent to the holding section 13 and the speed calculation section 15.

A signal from the second sensor 4 is input to the holding unit l3, and the value of the signal is “1” at time t when the falling timing is detected by the first timing detection unit l1.
The signal value "0" at the time t when the rising timing is detected by the first timing detection section 1l is held.

The signals from the first sensor 3 and the second sensor 4 are input to the second timing detection section 12, and detects the timing when the values of these signals become equal. That is, the third
In the illustrated time chart, the timings of time t2 and time t4 are detected and sent to the inclination determining section 14. If the paper sheet is not tilted, the timing will not be detected.

The inclination determining section 14 determines the direction of inclination of the paper sheet 2 based on the value held in the holding section 13 at the timing from the second timing detection section 12 . In this case, it is determined from the held values that the paper sheet is tilted to the left. The information on the inclination is sent to the speed calculation section 15.

The speed calculation unit l5 calculates the conveyance speed from the time (t+-tz) during which the first sensor 3 is covered with the paper sheet 2 based on the detection timing from the first timing detection unit 11. At this time, when calculating the conveyance speed based on the data detected when paper sheets are conveyed overlapped or tilted from the above-mentioned tilt measurement, data that deviates from a certain specified value is detected and the conveyance speed is calculated. Errors that occur during calculation can be reduced.

〔Effect of the invention〕

As explained above, the present invention uses a signal obtained from a sensor installed in a conveyance path to calculate the conveyance speed of paper sheets in an apparatus that involves conveyance of paper sheets. This has the effect that the conveyance speed in the device can be easily measured.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a diagram showing how the transport speed measuring device of FIG. 1 is used. FIG. 3 is a time chart of output signals from a sensor. 1... Conveyance path 2... Paper sheets to be conveyed 3... First sensor installed on the conveyance path 4...
Second sensors 5, 6 installed on the conveyance path...Signal line 7...Measuring device main body l1...First timing detection section 12...Second timing detection section 13... Holding section 14...Inclination determining section 15... Speed calculating section

Claims (1)

[Claims] (1) A sensor installed in the conveyance path of a device that conveys paper sheets, a measurement unit that detects the time that the paper sheet covers the sensor based on the signal from the sensor and measures the conveyance speed, A paper sheet conveying speed measuring device having a means for detecting data that deviates from a certain specified value due to overlapping or inclination of sheets being conveyed during measurement at a section, and increasing the accuracy of conveying speed calculation.