JPH03214090A - Checkup apparatus of adjustment of paper sheet detecting sensor - Google Patents

Abstract

PURPOSE:To make adjustment checkup quickly and accurately without using hands by storing command values on the amount of emission as adjustment checkup reference values in accordance with a plurality of situations and by conducting the adjustment checkup by taking out the stored values in accordance with the situations. CONSTITUTION:A light-emitting diode 1 of a detecting sensor is supplied with a necessary current from an emission amount control means 7 and an emitted light puts a phototransistor 2 in continuity. A voltage generated therein is given to an input terminal on one side of a comparing means 3, while a variable voltage Vs generated to be a reference voltage by a variable supply voltage control means 5 is given to an input terminal on the other side thereof. Accordingly, the means 3 compares these voltages and gives a comparison result signal to a discriminating means 4. Besides, a control element 6 gives commands to the means 5 and 7 respectively on the basis of the result of discrimination of the means 4. A storage means 9 is provided in the control element 6 and adjustment checkup reference values which are commands for obtaining different amounts of emission from the diode 1 in accordance with situations at the time of adjustment checkup are stored therein. Besides, the means 5 is connected with a command input means 10, whereby the commands of the adjustment checkup reference values stored in the means 9 can be inputted.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention detects the Jl adjustment state of a paper sheet presence/absence detection sensor used in a paper sheet processing device that processes paper type A such as banknotes. The present invention relates to an adjustment confirmation device that checks according to the situation in which the device is placed.

[Conventional technology]

2. Description of the Related Art Paper sheet processing devices such as banknote deposit devices used in financial institutions and the like use a large number of detection sensors that detect the presence or absence of paper sheets in order to control the operation of the device. This detection sensor generally has a light emitter and a light receiver facing each other with a path of paper sheets in between.

An example of a paper sheet processing apparatus will be outlined with reference to FIGS. 11 and 12. FIG. 11 is an external view of the paper sheet processing device, and FIG. 12 is a schematic diagram showing its internal structure.

As shown in FIG. 11, a deposit port 11 for taking in banknotes such as deposited banknotes and a withdrawal port 12 for taking out banknotes from the device as needed are provided at the upper front of the paper sheet processing device. ing. On the left and right sides of the upper front side of the deposit port 11 and the withdrawal port 12, there are operation sections 13 so that two tellers, who are operators, can instruct collection processing, withdrawal processing, counting processing, etc. from both sides of the device. is provided. A display section 14 is provided on the front side of each operation section 13, and the display section 14 displays the number of deposited coins, such as the number of deposits, and the counted amount if necessary. In addition, when an abnormality occurs or when the banknotes in the storage section become empty, a message to that effect can be displayed to notify the operator.

As shown in FIG. 12, the internal structure of this device mainly includes a storage section consisting of a deposit port 11, a withdrawal port 12, a conveyance section 15, a -time storage section 16, and a lower storage section 17, an identification section 19, etc. It is provided as a part.

This paper sheet processing device is capable of various operation modes. For example, in the case of the deposit counting mode, the banknotes set in the deposit slot 11 are taken in and conveyed to the recognition section 19a by the conveyance section 15, and the bills are transferred to the recognition section 19a. , the denomination and authenticity are determined, and after the determination, the conveyance section 15 conveys the corresponding denomination to the temporary holding section 16;
If there is no problem with the identification result in the identification section 19a, the product is stored in the lower storage section 17 provided at the bottom of the temporary storage section 16. When dispensing money, it is dispensed by the dispensing roller 18 provided at the lower part of the storage section 17, the authenticity is checked by the identification section 19b, and the necessary number of coins of the desired denomination are conveyed to the dispensing port 12.
Throw it in. In addition, in the case of counting mode, the deposit port 11
The set banknotes are conveyed to the recognition section 19a, the denominations of which are genuine and false are identified and counted, and the conveyance section 15 dispenses the banknotes to the dispensing port 12.

Such paper sheet processing apparatuses are generally provided with a large number of detection sensors as shown in FIG. These include, for example, banknote presence detection sensors for the deposit port 11 and the withdrawal port 12;
These sensors include a sensor for detecting passage of banknotes on the conveyance path, a storage detection sensor for the minus hour storage section 16 and the lower storage section 17, an empty detection sensor for the lower storage section 17, and the like.

Since the characteristics of each component of this detection sensor vary, it is necessary to adjust the detection operating point in order to appropriately determine the presence or absence of banknotes. For this reason, conventionally, the threshold value for the detection output of the detection sensor is adjusted for each detection sensor. In addition, this 2J adjustment must be performed at regular intervals to prevent misidentification due to aging of the sensor.

FIG. 13 is a circuit diagram showing a conventional adjustment of the detection operating point. In this circuit, a phototransistor 2 receives light emitted from a light-emitting diode 1 when a current is applied with a power supply voltage of +Vc, and a voltage generated when the phototransistor becomes conductive is detected by a comparator 3.
Compared with the variable voltage Vs which becomes the threshold voltage (reference voltage) at
The presence or absence of paper sheets is determined by the discriminating means 4 based on the size of the paper sheet, and the operating point is adjusted by setting the resistor R connected to the emitter side of the phototransistor to :A to adjust the input signal to the comparator. Adjustments are made to the magnitude or reference voltage V 2 entering the comparator. As described above, the operator performs such adjustments one by one for a large number of detection sensors. In addition, 3B adjustment is carried out again at regular intervals to take into account factors such as aging.

On the other hand, to check whether this adjustment has been performed correctly, check the switching operation for the on and off states of the light emitting current for each sensor, and check the sensor level when the current value is reduced in response to dirt. Measurements are performed using a tester or the like.

[Problem to be solved by the invention]

However, the level measurement for this adjustment confirmation is performed by an operator using a tester etc. for each sensor.
The complicated work of confirming that standard values are met is necessary, and even if there is a risk of malfunction due to fluctuations in adjustment values during operation, it is difficult to detect unless level measurements are taken. There is a problem that.

In addition, because the standards for checking adjustments are the same for various situations, such as assembly, shipping, and on-site operation, adjustments that were judged to be normal at the stage may be delayed due to changes in the environment (temperature, power supply noise, etc.). In some cases, it may be determined that the product is defective at this stage, and complicated readjustment may be required.

The present invention was made in order to solve such problems, and it is possible to easily perform i3 confirmation of the operating point of the paper sheet detection sensor using the optimum value depending on the situation of the device. The purpose of the present invention is to provide a paper sheet detection sensor adjustment confirmation device that is possible.

[Means to solve the problem]

According to the present invention, it is possible to confirm the suitability of adjusting the operating point of a detection sensor consisting of a light emitter and a light receiver that receives light emitted from the light emitter and generates a signal depending on the presence or absence of intervening paper sheets. gai'* recognition device for a paper sheet detection sensor, which comprises: a light emission amount adjusting means for adjusting the light emission amount of the light emitter; a comparison means for comparing a detection signal of the detection sensor with a predetermined threshold; and the comparison means. a determination means for determining passage or presence of a paper sheet based on a comparison result; a storage means for storing a plurality of adjustment confirmation criteria for the detection sensor; and an instruction manual for selecting and instructing one of the adjustment confirmation criteria. and a means for changing the light emission amount of the light emitter by the light emission amount adjusting means based on the adjustment confirmation standard selected by the instruction manual means and retrieved from the storage means, and detecting the detection sensor based on the changed light emission amount. The invention is characterized by comprising a control means for confirming the operation of the apparatus.

Immediately after 2gI as adjustment value 2 standards: J8 check standard applied to adjustment check, assembly check standard applied when the device is assembled, check standard applied when the device is shipped, device It is preferable that any two or more of the operational check criteria applied during operation of the system are used.

[For production]

In the automatic adjustment device according to the present invention, the command value of the amount of light emitted from the light emitting device of the detection sensor is stored in advance as an adjustment confirmation reference value corresponding to a plurality of assumed situations when checking the adjustment. The adjusted value is taken out and given to the light emitter depending on the situation, and the adjustment is confirmed based on that value. By using such a method, adjustments can be confirmed effectively, and the standards for later stages of the process are looser, so there are no problems that are judged to be abnormal even though they are normal. Never.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing the basic concept of the configuration of the present invention.

A necessary current IF is supplied to the light emitting diode 1 of the detection sensor from the light emitting amount control means 7, and the emitted light thereby makes the phototransistor 2 conductive. The voltage generated thereby is applied to one input terminal of the comparing means 3.

On the other hand, the other side input terminal of the comparison means 3 is supplied with a variable voltage V 1 which is a threshold voltage (reference voltage) generated by the variable power supply voltage control means 5 . Therefore, the comparing means 3 compares these and provides a comparison result signal to the determining means 4. Further, the control section 6 gives commands to the variable power supply voltage control means 5 and the light emission amount adjustment means 7, respectively, based on the determination result by the determination means 4. A storage means 9 is provided in the control unit 6,
An adjustment confirmation reference value, which is a command value for obtaining a different amount of light emission from the light emitting diode depending on the situation at the time of adjustment confirmation, is stored here. Further, an instruction input means 10 is connected to the control means, and a command regarding which of the adjustment confirmation reference values stored in the storage means 9 is to be used can be input.

FIG. 2 is a more specific version of the configuration shown in FIG. 1, and shows a configuration for automating all adjustments and adjustment checks of a paper sheet detection sensor used in a paper sheet processing apparatus.

First, as shown in FIG. 2, the detection sensor is a transmitted light sensor consisting of light emitting diodes 11 to 1n connected in series and phototransistors 2□ to 2o whose collectors are commonly connected. The command from the control unit 6 is converted from D to A by the D to A converter 7a, and the analog voltage is converted to the V-1 converter 7.
The light emitting current applied to b and generated from this V-1 converter 7b! F is applied to the light emitting diodes 11 to 1□.

In other words, the light emitting diode 1
The light emitting current IF flowing from □ to 1n can be controlled. In addition, the control unit 6 outputs a variable power supply voltage of 1,199
A command is given to the D-A converter means 5 as a means, and from there each comparator 31 to 3o forming the comparing means 3
For the normal input terminal of
A voltage (v81 to ■So) is given to define the voltage. The detection signals of the phototransistors 2□-2, which are the light-receiving side of the detection sensor, are input as input signals vIn to the inverting input terminals of the comparators 31-3.
~3 output signal V. ut is input to the control section 6, and it is determined whether the bill is passing based on whether this output signal (V) is at a high level or ut is at a low level. Note that the determining means 4 shown in FIG. 1 corresponds to the CPU 8 in the actual device, so it is common to the control section 6. Here, the control unit 6 is controlled by the CPU 8. ROM9
a and RAM 9b. Here, the ROM 9a stores a part of the control program and a plurality of adjustment confirmation standards for the detection sensor set f, respectively, and the RAM 9b holds data etc. obtained during adjustment of the detection sensor. This adjustment confirmation standard is for providing a plurality of different amounts of light emission to the light emitting diode, as will be described later. Further, an instruction input means 10 is also connected to the control section 6, and is used to instruct which of a plurality of adjustment confirmation standards to use depending on the situation.

Next, the operation of the circuit shown in FIG. 2 will be explained with reference to the flowchart shown in FIG.

First, the automatic adjustment operation of the threshold voltage (reference voltage) of the comparison circuit will be explained. This automatic adjustment of the threshold voltage is
This is performed when adjustment is required due to a sensor error of the passage detection sensor, when the power is turned on, or when an M adjustment instruction is given by the instruction manual means 10 for periodic adjustment.

First, the voltage applied to the V-1 converter 7b via the D-A converter 7a is controlled based on a command from the control unit 6 so that the light emitting current IF of the light emitting diode is 20% of the normal value (step S1 ). Here, the light emitting current IF
The reason for setting 20% of the normal value is that, as is clear from Figure 4, which shows the input/output characteristics of the comparator, the detection output (VIn-vL) of the detection sensor when detecting the presence of paper sheets is Since it is usually a few percent to 10% of the detection output (VIn-"II) when no detection is being performed, it is certain that the actual threshold value (vv) is within the range of vL and Vll TIIL' Tl1
This is to ensure that it falls within 11. It is assumed that this 20% value is stored in the ROM 9a.

In this way, with the light emitting current IF set to 20% of the normal value, the D-A converter 5 is controlled based on the command from the control unit 6 to first set the variable power supply voltage (V) to O■ (Step S2). Next, gradually raise it (step S3),
Output signal ■. It is confirmed that ut has been reversed (from L to H) (step S4), and when it has been reversed, the V 2 at that time is temporarily stored in the RAM 9b in the control section 6 (step S5).

Subsequently, an adjustment check is performed to confirm whether or not V 2 temporarily stored in the RAM 9b is an appropriate value.

First, the 1.1 i11 section instructs the DA converter 5 to fix V at the value temporarily stored in the RAM 9b. Then, with {circle around (2)} fixed, the light emitting current IF of the light emitting diode is increased by a predetermined amount from the normal 20%, for example, to 25% of the normal light emitting current IF, and the human power signal v1□ is raised (step S6). At this time, the output signal V
. It is confirmed that uL is inverted (HL) (step S7). Next, reduce the light emitting current by a predetermined amount, for example, to 18% of the normal light emitting current! F is lowered and input signals v and n are lowered (step S8). At this time, the output signal V. It is confirmed that ut is inverted (from L to H) (step S9). After setting the threshold "T11" in this way, when the output signal is definitely inverted as the input signal "in" is raised and lowered, the +tJ 'Ffs source voltage V at that time is stored in the RAM 9b as a normal value, The threshold vi adjustment operation ends. On the other hand, when the output signal V does not perform an inversion operation in the confirmation operation, the adjustment operation is restarted from the beginning, and if the adjustment cannot be made even after readjustment (step 511), an adjustment error is detected. Display (step 512) and end.

Such adjustment of the detection sensors is performed sequentially for each detection sensor in a predetermined order.

Next, confirmation of adjustment of the detection sensor will be explained.

In addition to the I3 alignment check that is performed immediately after the automatic adjustment of the detection sensor mentioned above, the adjustment check includes the assembly check (A check) that is performed when the device is assembled, and the device shipment n, 'j.
There are various checks such as a check at the time of shipment (B check) and an operation check (C check) performed during operation of the device, and each has different adjustment confirmation standards. These standards are stored in advance in the ROM 9a. These standards are shown in Figure 5, and check at the time of assembly (A check) → check at the time of shipment (B check)
The confirmation standards are set to become looser and the permissible range becomes wider in the order of the serial use check (C check).

FIG. 6 is a flowchart showing the operation of performing the A adjustment check of the detection sensor. Here, since the check at the time of adjustment is performed after the automatic adjustment is completed, the checking criteria are strict since the check is performed after the adjustment, and as already explained with reference to FIG. 3, it is performed automatically after the adjustment.

On the other hand, checks during assembly, checks during shipment, and checks during operation are performed according to instructions without automatic adjustment. Note that, as described later, the check during operation may be automatically performed when the power is turned on.

First, it is checked whether the power is turned on (step 5).
21) When there is a check instruction (step 522), not when the power is turned on, an interrupt is generated and a transition is made to the #alignment check mode. In this state, wait for manual check (step 523), and check type is manually checked (step 523).
step 524).

On the other hand, when the power is turned on, or when there is a check instruction and there is no manual effort for the check type, the C check can be automatically set (step 525).

The following setting values differ depending on the type of check, and the type of check is determined in step S31. In the case of A check, the light emitting current IF is set to 29% of the normal value (step 532), and B
In the case of a check, the control unit instructs the D-A converter 7a to set the light emitting current IF to 34% of the normal value (Step 5337. In the case of a C check, the control unit instructs the D-A converter 7a to set the light emitting current IF to 50% of the normal value (Step 534). .As a result, the input signal v1□ rises, but the output signal ■ becomes L
level (Stella ut 535).

Next, the type of check is determined again in step S36,
In the case of A check, the light emitting current IF is set to 17% of the normal value (step 537), in the case of B check, the light emitting current IF is set to 15% of the normal value (step 538), and in the case of C check, the light emitting current IF is set to the normal value. The control unit instructs the D-A converter 7a to set the value to 12% (step 839). At this time, the output signal V. It is confirmed that ut is inverted and becomes H level (step 540). When the H level is confirmed in step S40, it is determined that there is no problem with the sensor adjustment check (step 541), and the process ends.

On the other hand, if the predetermined level cannot be confirmed in step S35 and step S40, first check whether or not the readjustment has already been performed n times, which is the limit number of readjustments (step 542), and if there are still n times. If not, readjustment is performed (step 543), and even if the re-adjustment reaches n times, if the A-adjustment is not completed, a sensor error is displayed (step 544) and the process ends.

In this manner, this device can automatically check according to the state of the device using check criteria appropriate to that state.

Next, a comparison circuit that uses the input signal VIn as a threshold value to determine the presence or absence of a comparison banknote will be described with reference to FIG. This comparison circuit compares a human input signal with a threshold value set as a reference value, and generates an output depending on the magnitude thereof. This comparison circuit is affected by noise components in the human input signal VIn and minute fluctuations in the input signal v1o near the threshold.
The input signal vIn and the output signal V are such that the output signal V does not cause malfunction phenomena such as chattering. ut is made to have hysteresis characteristics. The width of the dead zone in this hysteresis characteristic is automatically changed to an appropriate value according to the threshold value. Therefore, it is very effective in devices where the threshold value is not determined in advance and is automatically adjusted.

To explain the configuration of this comparator circuit, the voltage V supplied from the i1 variable voltage power supply 3 is input as input vp1 to the normal rotation side input terminal of the first comparator 21 via the resistor R1, and this input terminal , the output of the second comparator 22 is connected to the resistor R
It is given via 2. Resistors R and R2 form a voltage divider circuit and divide the variable voltage R voltage Vs. Since the input signal VIn is input to the inverting side input terminal of the comparator 21, the output signal VIn, which is the comparison output, is input from the output terminal of the comparator 21.
is taken out and inputted to the normal rotation ut input terminals of the comparator 22 as an input V,2. Further, a power supply voltage of 10 Vc is applied to this output terminal via a resistor R3, and this power supply voltage is applied to resistors R and R5 connected in series.
The voltage is divided by a voltage dividing circuit consisting of the following: The divided voltage is input to the inverting input terminal of the comparator 22. It is given as 2.

Here, the comparator 22 is an oven in which an open output with an infinite resistance value is generated at the output terminal when the normal input is larger than the inverted input, and a ground output is generated at the output terminal when the normal input is smaller than the inverted input. It forms a collector circuit, and its equivalent circuit is shown in FIG. As shown in the figure, this circuit consists of a differential amplifier made up of transistors Q1-Q6 and an output circuit made up of transistors Q7 and Q8.

The voltage V supplied from the variable voltage power supply is input to the positive/inversion input terminal of the first comparator 21 via the resistor R1, and the output of the second comparator 22 is input to this input terminal via the resistor R2.
is given through.

Resistors R and R2 form a voltage divider circuit, and the variable power supply voltage V
divide the pressure.

Therefore, the comparator 22 compares the output signal of the comparator 21 with the divided voltage of the electric current g (V) to produce an output signal (VoUt).
It is determined whether the signal is at a high level or a low level, and the output is switched depending on the result, and the threshold value (VV) Tllll' TIIL that is input to the normal input terminal of the comparator 1 is switched.

The operating principle of this comparison circuit is explained below in Figures 7, 9, and 1.
This will be explained with reference to FIG. Now, in FIG. 7, the input signal (V) entering the inverting input terminal of the comparator 21 is higher than the voltage (V, 1) entering the normal input terminal (vnl>vpl), and its output signal is v
-0 state. In this state, the normal input terminal of the comparator 22 is v-0, and the inverting input terminal is v-0. Therefore, since the input of the inverting input terminal is larger (
vn2>Vp2), the output of the comparator 22 becomes the ground level, and the voltage of is applied to the normal input terminal of the comparator 1.

This voltage is the threshold voltage when the output signal inverts from L to H as the voltage of the input signal (V, , ) decreases, and this threshold voltage ■T
IIL is.

Conversely, the input signal (V, .

) is smaller than the normal input voltage (V , , ) (v × v ), and its output signal is v. ut-+Vcnl
Assume that the state is pl. In this state, the voltage applied to the non-inverting input terminal of the comparator 2 is v,2-+Vc, and the voltage applied to the inverting input terminal is . Therefore, the inverting input terminal is smaller (v.2<V,2), the output of comparator 2 is open, and the normal input terminal of comparator 1 has V, 1-
A voltage of V5 will be applied. This voltage is the input signal (
As the voltage of V, n) increases, the threshold voltage when the output signal is inverted from H to L is THII''vs. Therefore, the width of the dead zone due to the hysteresis characteristic is as follows. This situation is shown in FIG.

As described above, the width of the dead zone is determined by the constants of the 11-bag power supply voltage (V) and the resistance (R1°R2) for setting the threshold voltage, and is in a proportional relationship with the iiJ variable power supply (Vs). Therefore, when the threshold voltage is changed, the width of the dead zone changes accordingly. For example, as shown in Fig. 10, when the threshold voltage is lowered to vTH, the width of the dead zone (E,,') also decreases accordingly. , when the threshold voltage is increased to close vTll, the width of the dead zone (E,,') also increases accordingly, and the width of the dead zone always changes at a constant ratio to the threshold voltage, and the width of the dead zone is determined to be an appropriate width. Therefore, even if the threshold value is not known in advance, the width of the dead zone (E, ) of the hysteresis characteristic can be changed and set according to the variable type [(V) for adjusting the threshold value, so that an appropriate dead zone can always be maintained. settings can be made.

Note that in this example, we explained an inverting comparison circuit, but
Even in a normal comparison circuit in which the inverting input terminal and the normal input terminal are connected in reverse, the width of the dead zone due to the hysteresis characteristic.
Similarly, I+ is the il transformer power supply (Vs) and resistors (R1, R2)
Since it is determined by the constant of , a variable width dead zone can be obtained.

As described above, in this paper sheet processing equipment, it is possible to check whether adjustments have been made to a large number of detection sensors. It is possible to check the 1m accuracy of the detection sensor using the following check criteria.

In the above example, the adjustment confirmation standard values are those equivalent to the check at the time of adjustment, the check at the time of assembly, the check at the time of shipping, and the check at the time of operation. It is also possible to use the A-adjustment confirmation reference value.

Further, although the adjustment confirmation reference value is stored in the ROM in the embodiment, any storage means that can maintain the storage state for a long period of time, such as a battery-backed RAM, may be used. can.

Further, although the above embodiment uses a comparison circuit in which the dead zone due to hysteresis of human output characteristics can be automatically changed by a threshold value, the comparison circuit is not limited to this;
A simple comparator or a conventionally known Schmitt trigger circuit may also be used.

In addition, in the above embodiment, the light emitting current IF was reduced by several percent of the normal value.
~10% is the detection output of banknotes, and the normal 20% in between is used as the threshold standard,
Of course, these values differ depending on the type of sensor and how the sensor is arranged.

In addition, in the above embodiment, as shown in FIG. 2, the detection sensors are connected in series and controlled based on commands from the control section. I converters may be connected in parallel to individually control the detection sensors.

〔Effect of the invention〕

As described above, according to the paper sheet detection sensor adjustment confirmation device according to the present invention, the command value of the light emission amount is stored in advance as the adjustment confirmation reference value according to a plurality of situations, and the command value is stored in advance as the adjustment confirmation reference value according to the situation. Since the stored value is retrieved from the situation and the adjustment is confirmed, it is possible to quickly and accurately confirm the adjustment using an appropriate reference value according to the situation without any manual effort.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the basic concept of the configuration of the present invention, FIG. 2 is an explanatory diagram showing a schematic configuration of a paper sheet processing apparatus that is a more specific version of the configuration in FIG. 1, and FIG. 3 is a comparison diagram. A flow chart explaining the automatic adjustment operation of the threshold voltage (reference voltage) of the circuit, Figure 4 is a graph showing the input/output characteristics of the comparator, Figure 5 is a graph showing the input/output characteristics of the comparator.
The figure is a graph showing each criterion for checking the adjustment of the detection sensor,! Fig. 6 is a flowchart showing the operation when checking the adjustment of the detection sensor, Fig. 7 is a circuit diagram showing the configuration of the comparison circuit that uses the input signal vIn as a threshold value to determine the presence or absence of a comparison banknote, and Fig. 8 is a circuit diagram showing the configuration of the comparator circuit that determines the presence or absence of a comparison banknote. Detailed circuit diagram, FIG. 9 is an explanatory diagram of the dead zone, FIG. 10 is an explanatory diagram showing variation in the width of the dead zone due to the configuration of FIG. 7, FIG. 11 is an external view of the paper sheet processing device,
FIG. 12 is a schematic internal structure diagram thereof, and FIG. 13 is a circuit diagram showing adjustment of a conventional detection sensor. DESCRIPTION OF SYMBOLS 1... Light emitting diode, 2... Phototransistor, 3... Comparison means, 4... Discrimination means, 5... Edible power supply voltage control means, 6... Control part, 7a... D-A
Converter, 7b-V-1 converter, 8-=CP
U, 9a-ROM, 9b...RAM, 21.
22... Comparator.

Claims (1)

[Claims] 1. Appropriateness of adjusting the operating point of a detection sensor consisting of a light emitter and a light receiver that receives the light emitted from the light emitter and generates a signal depending on the presence or absence of intervening paper sheets. A paper sheet detection sensor adjustment confirmation device that performs confirmation includes: a light emission amount adjusting means for adjusting the light emission amount of the light emitter; a comparison means for comparing a detection signal of the detection sensor with a predetermined threshold; and the comparison means. a determination means for determining passage or presence of a paper sheet based on a comparison result; a storage means for storing a plurality of adjustment confirmation standards for the detection sensor; and an instruction input for inputting an instruction to select one of the adjustment confirmation standards. and means for changing the light emission amount of the light emitter by the light emission amount adjusting means based on the adjustment confirmation standard selected by the instruction inputting means and retrieved from the storage means, and the detection sensor based on the changed light emission amount. A control means for checking the operation of a paper sheet detection sensor. 2. Adjustment confirmation standards include adjustment check standards that are applied to adjustment confirmation immediately after adjustment, assembly check standards that are applied when the device is assembled, shipping check standards that are applied when the device is shipped, and 2. The paper sheet detection sensor adjustment confirmation device according to claim 1, wherein any two or more of the operational check standards applied during operation are used.