JPS6246839A - Running condition monitoring device for paper sheet - Google Patents

Abstract

PURPOSE:To make possible to stably monitor the running of paper sheets to be conveyed without being affected by fluctuating factors, by calculating the travel distance of a conveyer belt in accordance with signals from first and second detectors located at two positions along the conveyer belt, for detecting conveyed paper sheets and a third detector for detecting the feed amount of the belt. CONSTITUTION:A counter 11 in a processor 8 sequentially counts and holds the number of pulses fed from a rotary encoder 10 as a third detector, and a microprocessor 9 in the processor 8 reads in the value of a number (n) on a corresponding counter when it receives a detection signal H from a first optical sensor 6, and reads in the value of a number (m) on another corresponding counter when it received a detection signal H from a second optical sensor 7. Further, the difference S between the values (n, m) is calculated, and if the value S exceeds a set value M, it is determined that an abnormal is terminated and then, a process is started for issuing an alarm, etc. Thus, it is possible stably monitor the running condition even through the drive source is fluctuated due to differences in the performance of the drive source itself and the use condition.

Description

[Detailed Description of the Invention] [Industrial Application] This invention has many uses! ■Prevent stacking, stagnation, loss, etc. of paper sheets, etc. in the running system of devices that count paper sheets, etc. 1.
1-Relates to a method for monitoring the running condition of paper sheets, etc.

[Prior Art] Conventionally, as a method for monitoring the running state of paper sheets, etc. in a running system of a device for counting paper sheets, etc., to prevent overlapping, stagnation, or loss of paper sheets, etc., there are, for example, Two optical sensors are placed in the system, and the time from when a paper sheet, etc. moving in the traveling system blocks the light of the first optical sensor to the time when it blocks the light of the second optical sensor. is set at 4-1, and whether this value is a predetermined value or not is used to monitor whether the IE is running normally or abnormally.

[Problems to be Solved by the Invention] However, in such a conventional method for monitoring the running condition of paper sheets, etc., 1. Differences in the performance of the drive source (motor, etc.) itself or pickpocketing. When a problem occurs, ■ Starting the drive source 11
．． The time it takes for the rotational speed to become constant from 'l', ■ When the rotational speed of the drive system becomes low due to a change in (, 4), ■ Usage conditions (power supply voltage, temperature.

When the drive source fluctuates due to humidity, etc.), the problem is that even if the paper is running constantly, it is judged to be running constantly, making the νΩ vision unstable. be.

[Objective of the Invention] The object of the present invention is to solve the conventional problems described in +)'+, and to enable stable monitoring even in the cases described in (1) to (3) above, and to eliminate the difference (50/ 60H2), it is desirable to have a system for monitoring the running state of paper sheets, etc., which is not affected by differences in the rotational speed of the drive source.

[The first stage of this invention to achieve the first objective is as follows:
A conveyor belt that is driven by rollers to convey paper sheets, etc.;
The first one detects the paper sheet, etc. between two points on this conveyor belt.
1) a third detector for detecting the crossroads of conveyor belt feeding described in 11 above; and a processing device, wherein the processing device includes The movement of the conveyor belt is calculated based on the detection signal of the third detector according to the detection 4r''; System for monitoring the running state of paper sheets, etc. to be monitored [] In the system for monitoring the running state of paper sheets, etc. configured in this way, the third detector for detecting the feed H(of the conveyor belt) detects the feed jj of the conveyor belt. (is detected, and this detection signal is input manually to the processing device. Also, paper sheets etc. that are transported by the transport belt are detected by a first detector and a second detector located at two locations on the transport belt. The detection signals are input to the processing device.The processing device then inputs the detection signals from the third detector in response to the detection signals from the first detector and the second detector. Based on the movement of the conveyor belt
It calculates whether the amount of movement is within a predetermined value or not, and monitors whether the paper sheets, etc. are constantly running or 5'! :11 can be monitored.As a result, stable monitoring can be performed without being affected by various causes of fluctuations regarding feed.

[Embodiment] Hereinafter, one embodiment of the system for monitoring the running state of paper sheets, etc. according to the present invention will be described in detail with reference to the drawings.

1 to 3 show embodiments of the present invention.

FIG. 1 shows a bill running state monitoring system for continuously counting bills such as paper sheets.

As shown in the figure, the banknote 1 is carried by a pair of conveyor belts 2.3.
and transported in the direction of arrow a. The pair of conveyor belts 2 and 3 are respectively connected to the pair of rollers 4 cl +
It moves by 4 b + 51 + 5 b. In addition, a pair of rollers 4a, 4b, 5a+5
The rollers 4a and 5a of the rollers b are connected to a drive motor and rotated.

A first optical sensor 6 and a second optical sensor 7 as detectors are arranged on the pair of conveyor bells l-2 and 3 at locations 2i' and zl where the banknotes 1 pass. be done.

The first optical sensor 6 and the second optical sensor 7 are
A photointerrupter detects the banknote 1 by intercepting the light of the photointerrupter, and the leading edge of the banknote 1 being conveyed while being held by the conveyor belt 2.3 detects the banknote 1 with a detection signal H (high level signal). ; see Figure 2) in the processing device 8.
The data is sent to the microprocessor 9 of the computer.

Next, on the shaft of the roller 4a of one conveyor belt 2, a third
A rotary encoder 10 as a detector is coupled.

This rotary encoder 10 generates a number of pulses (No. 1) proportional to the moving distance of the transport heald 2, and sequentially sends them to the counter 11 of the processing device 8.
A counter 11 counts the number of pulses.

In the multi-view viewing system for paper sheets, etc. configured in this way, the counter 11 sequentially counts and holds the number of pulses sent out from the rotary encoder 10.

- On the other hand, as shown in FIG. 2, the microprocessor 9 of the processing device 8 reads the corresponding counter value n when receiving the detector shift H from the first optical sensor 6,
And when the detector from the second optical sensor 7 receives Fl, the corresponding value m of the counter is read.

Note that L (LOW level) indicates a signal in an undetected state.

FIG. 3 is a flowchart showing the processing by the microprocessor 9 in this case.

First, in step (2), it is determined whether the signal from the first optical sensor 6 is in the "H" state. And step■
When the signal is in the "H" state, the value n of the counter 11 is read. Next, in step (2), it is determined whether the signal from the second optical sensor 7 is in the "H" state. In the next step (2), the value m of the counter 11 is read when the state is "H".

In this way, after finding the values of l and m, step
The difference S between these values is calculated. Then, it is determined whether or not this value is within the range of the set value M, and if it is less than the set value M, it is terminated permanently and waits until the next monitoring time comes.
+Ij: Start similar processing from step ① and repeat.

・If M or more is 1., the process starts to generate an alarm etc. as an abnormal path r.

Here, the set value M is a value obtained by converting the allowable travel distance of the bill from the first optical sensor 6 to the second optical sensor 7 into the number of pulses.

In the case of subroutine processing, processing can be performed according to the flow shown in FIG. 4 in order to shorten processing time.

In the embodiment, the movement value is calculated as a difference value, but it is also possible to clear the counter with the signal from the first detector, read the count value with the second detector, and directly calculate the movement value 5j. Of course.

Further, the third detector is not limited to a rotary encoder, and may detect the moving distance using a celsin or the like, or may directly read the value from a distance scale.

Historically, the counter does not need to be placed separately from the microprocessor; a memory area connected to the microprocessor may be used as the counter.

In addition to banknotes, the paper category includes thin metal plates.

There are plastic cards, securities, tickets, etc.

[Effects of the Invention] As is clear from the explanation in 1-1 below, the method for monitoring the running state of paper sheets, etc. in this invention includes a conveyor belt that is driven by rollers to convey paper sheets, etc., and a conveyor belt that is driven by rollers to convey paper sheets, etc. A first detector and a second detector that detect the paper sheet or the like between two points, a third detector that detects the feed river of the conveyor belt, and a processing device, The apparatus moves the conveyor belt M based on the detection signal of the third detector in response to the detection signals from the first detector and the second detector.
is calculated and monitors whether the amount of movement is within a predetermined value, so if there is a difference in the performance of the drive source (motor, etc.) itself or a slip occurs, the amount of movement is monitored from the time the drive source is started until the rotation speed becomes constant. When the rotational speed of the drive source becomes low due to changes in the load in the traveling system, the usage conditions (power supply voltage, temperature, humidity, etc.)
Therefore, stable monitoring can be performed even when the drive source fluctuates, and it is not affected by a difference in the rotational speed of the drive source due to a difference in the power supply frequency (50/80H2).

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of the method for monitoring the running state of paper sheets, etc. according to the present invention, and FIG. 2 is a timing diagram showing the pulse signal from the encoder and the value of the counter when detecting the banknote 1. FIG. 3 is a flowchart showing processing by the microprocessor, and FIG. 4 is a flowchart showing processing by the microprocessor when performing interrupt processing. 1...Banknotes, 2.3...Transport belt, 4 a
l 4 b+5 a + 5 b...Roller,
6...First optical sensor, 7°...Second optical sensor, 8...Processing device, 9...Microprocessor, 10...Rotary encoder, 1■...・
・・kara/ri. Special 1. 1. Applicant II

Claims (2)

[Claims] (1) A conveyance belt that is driven by a roller to convey paper sheets, etc., a first detector and a second detector that detect the paper sheets, etc. between two points on this conveyance belt, and the conveyance belt. comprising a third detector for detecting the amount of belt feed and a processing device,
The processing device calculates the amount of movement of the conveyor belt based on the detection signal of the third detector in accordance with the detection signals from the first detector and the second detector, and determines that the amount of movement is a predetermined value. A method for monitoring the running state of paper sheets, etc., which monitors whether or not the paper sheets, etc. (2) The processing device consists of a microprocessor and a counter, and the third detector is a rotary encoder,
The counter counts the detection signals of the rotary encoder, and depending on whether the difference between the numerical values of the counter corresponding to the detection signals from the first detector and the second detector is a predetermined value, A system for monitoring the running state of paper sheets, etc. according to claim 1, which monitors the running state of paper sheets, etc.