JPS6155155B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a running detection device for banknotes and the like. That is, in a detection device that detects the running of a bill or the like or double running by detecting a change in the amount of transmitted light between a light emitting element and a light receiving element during light emission, the conventional detection device detects a change in the amount of transmitted light during light emission between a light emitting element and a light receiving element. Check the running detection of banknotes, etc. by inserting a banknote, etc. or a simulated banknote, etc., or check the double running detection by inserting two overlapping banknotes, etc. or a simulated double banknote, etc. as an alternative. However, with this method, it is impossible to check the function of the detection operation every time the detection device starts the operation of detecting the running of banknotes or the like.

The present invention makes it possible to check the operation of the detection device without actually running the bill by replacing the change in the amount of detected light caused by the running of the bill with a change in the light amount of the light source. To provide a function check that can be easily performed every time immediately before or after an operation is performed, and that the reliability of the detection operation can be made higher and stable and reliable running detection can be performed.

Next, the attached example diagrams will be explained.

In FIG. 1, A is a counting light quantity signal transmitted when a counting light quantity button (not shown) is pressed;
B is a double light amount signal transmitted when a double light amount button (not shown) is pressed; 1 is a current adjustment circuit;
2 is a light source LED, 3 is a light receiving sensor, 4 is an amplifier, C1 and C2 are comparators, a is a counting signal, b
indicates a double signal. FIG. 2 is an explanatory diagram of pulses.

Moreover, FIG. 3 shows an example of a current adjustment circuit, and 5
indicates a NAND gate, 6 indicates an inverter, and 7 indicates an OP amplifier. FIG. 4 shows an example of a light receiving circuit.

When the current adjustment circuit 1 receives a signal at the time of bill detection, it passes a current of about 100 mA to the LED 2 of the light source, and when it receives a counting light amount signal A, it passes a current of about 20 mA.
current, and when receiving dual light intensity signal B, approximately
A current of 5mA will be applied to each.

When detecting the passage of banknotes by detecting the amount of transmitted light, when adjusting or checking the detector, generally a white paper cut to the size of a banknote, that is, a mock banknote, is used instead of an actual banknote to adjust the detector. However, in this case, the voltage or current generated in the light receiving sensor 3 is reduced to about one-sixth by cutting off the light source of one simulated banknote, and when two real banknotes are overlapped. When converted into the case of simulated banknotes, the decrease in light intensity corresponds to the overlap of four banknotes, which is about one fourth of the value in the case of one simulated banknote.

In the detection device shown in the attached drawing, the light source LED 2 is used to change the amount of light on the light receiving sensor 3 when the banknote is generally running and to change the amount of light on the light receiving sensor 3 when the bill is running double, without depending on the running of the actual banknote. This can be done by reducing the energizing current by the current adjustment circuit 1, and press either the counting light amount button or the double light amount button (not shown) to send the counting light amount signal A or the double light amount signal to the current adjustment circuit 1. B
By inputting , the current flowing through LED 2 of the light source is changed instantaneously, and by this, it is possible to detect whether the bill is running by checking whether the light receiving circuit has accurately generated the counting signal a or the double signal b. .

Therefore, by replacing the change in the amount of detected light caused by the running of the bill with a change in the amount of light from the light source, it is possible to check the operation of the detection device without actually running the bill.

In FIG. 2, arrows each indicate a related state.

In this way, the present invention reduces the current flowing through the light emitting element by the current adjustment circuit when receiving the counting light amount signal, and further reduces the current flowing through the light emitting element when receiving the double light amount signal than when receiving the counting light amount signal. Therefore, it is possible to check the function of the detection device by changing the amount of light emitted from the light emitting element without running the banknote, so it is easy to check the function every time immediately before or after the movement of the banknote, etc. It has the characteristics that it can achieve higher reliability of detection operation, can perform stable and reliable running detection, and can be carried out suitably.

[Brief explanation of the drawing]

In the accompanying drawings, FIG. 1 is a schematic explanatory diagram of the detection device, FIG. 2 is an explanatory diagram of pulses, FIG. 3 is a current adjustment circuit diagram, and FIG. 4 is a light receiving circuit diagram. A... Counting light amount signal, B... Double light amount signal, 1... Current adjustment circuit, 2... LED of light source, 3... Light receiving sensor, 4... Amplifier, C1, C2... Comparator, a... Counting signal, b... Double Signal, 5...NAND gate, 6...Inverter, 7...OP amplifier.

Claims (1)

[Claims] 1. In a device that detects running or double running of a banknote by comparing the change in the amount of transmitted light during emission between a light emitting element and a light receiving element that receives light from the light emitting element with a reference light amount, the light emitting element is The structure is such that the amount of light emitted can be changed by increasing or decreasing the amount of light emitted, and when a counting light amount signal is transmitted by the operating means operated at the time of function check, the energizing current is decreased from the current flowing at the reference light amount. The amount of light is set to be about the same as the amount of transmitted light when the bill is running, and when a double light amount signal is transmitted, the applied current is further decreased from the current applied at the time of the reference light amount than when the counting light amount signal is received. 1. A running detection device for banknotes, etc., comprising a current adjustment circuit that adjusts the amount of light to be approximately the same as the amount of transmitted light when the banknote double runs.