JPH0769147B2 - Coin outer diameter data measuring device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a coin outer diameter data measuring device for measuring the outer shape of a coin rolled in a coin rolling passage.

[Prior Art] Conventionally, as a device for measuring the outer diameter of a coin to be inserted in a public telephone of a station power supply system, for example, Japanese Patent Application No.
There is one described in 63-276118.

As shown in FIG. 6, this is provided with a plurality of coin outer diameter sorting sensors 3 for sorting the outer diameter of coins, that is, coins, and discriminating the outer diameter of coins according to the ratio of the detection time by the plurality of sensors 3. It is something to do. That is, in FIG. 6, 1 is a coin, 2 is an insertion detection sensor for detecting insertion of the coin 1, 3 is a plurality of coin outer diameter sorting sensors described above, 4
Is a material / thickness selection unit that detects the material and thickness of coins, and 5
Is a distribution magnet, 6 is a distribution lever, and 7 is a passage detection sensor for detecting passage of the coin 1. When the inserted coin 1 is detected by the insertion detection sensor 2,
First, the coin outer diameter sorting sensor 3 sorts, and further,
When the material / thickness is selected by the material / thickness selection unit 4 and it is determined that the coin is a true coin, the coin 1 passes through the passage detection sensor 7 and is accumulated. Further, as a result of coin selection, when it is determined that the coin is not a true coin, the sorting magnet 5 is driven, and as a result, the sorting lever 6 operates and the coin 1 is returned.

Next, FIG. 7 is a detailed block diagram of a coin processing unit that performs processing such as sorting of coins 1. In the figure, the same parts as those in FIG. 6 are designated by the same reference numerals and the description thereof will be omitted. In FIG. 7, 9 is a storage / return processing unit for storing / returning coin 1, 10 is a binary counter, 11 is a CPU, and RST.
Is a reset signal and CK is a clock signal.

Then, as described above, in order to select the outer diameter of coins, a plurality (three) of LEDs 3 _{1 to} 3 ₃ and a plurality of phototransistors 3 ₄ which are arranged facing each other and which receive the light emitted from these LEDs are provided. to 3 ₆ and is provided, so that between these coins 1 measures the outer diameter of the coin 1 by counting the time to block by passing through. That is, while the coin 1 is passing between them LED 3 ₁ to 3 ₃ and the phototransistor 3 _{4-3 6,} the binary counter 10 counts this by inputting the clock signal CK, the count value CPU1
The outer diameter of the coin is measured by reading out by 1 and performing calculation.

However, since this public telephone needs to be operated only by the local power supply, it is necessary to select the outside diameter of these coils.
It does not have enough power to light LEDs 3 _{1 to} 3 ₃ all the time. Therefore, conventionally, the outer diameter of the coin is measured based on the operation explanatory diagram shown in FIG. Since this coin outer diameter data measuring device performs exactly the same process for each coin outer diameter sorting sensor, an example of outer diameter data detection by one sensor will be described on this explanatory diagram.

That is, if in step 50 insertion of a coin is detected by the insertion detection sensor 2, driven by supplying power to the LED 3 ₁ for sorting the outer diameter of the coin at step 51, followed by the binary counter in step 52 10 is reset by the reset signal RST. After that, coin 1 becomes LED3 ₁
And the phototransistor 3 ₄ facing the LED 3 ₁ passes, the clock signal CK is passed through the binary counter 10 during this time.
And the clock signal CK is counted. Then, in step 53, the value of the binary counter 10 is read every predetermined time (every 3.3 ms), and in step 54, it is read whether or not this value has reached the value at which the measurement of the outer diameter of the coin should be started, that is, the previous reading. It is determined whether or not the value of the binary counter 10 and the value read this time do not match. If they match and it is determined as "N", the process returns to step 53 and the value of the binary counter 10 continues. However, when the value of the binary counter 10 does not match the previous value and the coin outer diameter measurement should be started, the coin outer diameter measurement is started.

After that, the value of the binary counter 10 is read every predetermined time (step 55), and the binary counter 10 is read until the read value and the previous read value match, that is, the value at which the outer diameter of the coin is measured. The value of is read. When the value of the coin to be measured is determined to be "Y" in step 56, the outer diameter data of the coin is calculated from the value of the binary counter 10 at the time of starting and ending the measurement (step 57). ), Then step
Turn off the power of LED3 ₁ for measuring outer diameter data of coins at 58. In this way, in the past, since it was necessary to operate with limited power, the LED3 ₁ for measuring the outer diameter is turned on after the coin is detected, and this power is turned off at the end of the measurement. I have to. Also, CPU1
1 is usually in a sleep mode which is a low power consumption mode, and wakes up (wakes up) at predetermined time intervals to perform an outer diameter measurement process of the coin 1.

Thus the prior art, because you have to turn on the LED 3 ₁ after insertion detection of the coin, as shown in FIG. 9,
Although the coin 1 does not pass for 2 to 4 ms after the LED3 ₁ turns on (during the time Y), the binary counter
The value of the binary counter 10 indicates the value A, that is, the initial value X after the data is determined such that 10 operates and the binary counter 10 operates stably and its value becomes a constant value. Therefore, the count value used for actual coin outer diameter measurement is
The initial value X is subtracted from the counter value B after the coin 1 has passed through the coin outer diameter selection sensor 3.

[Problems to be Solved by the Invention] In the conventional coin outer diameter data measuring device described above, the initial value X is stored in the memory in advance as a fixed value, and the fixed initial value X is stored.
Since the outer diameter of the coin is selected based on the above, there is a problem in that the initial value X fluctuates due to variations in elements and changes over time, so that accurate outer diameter selection of the coin cannot be performed.

[Means for Solving the Problem] In order to solve such a problem, a first invention of a coin outer diameter data measuring device according to the present invention is provided in a coin rolling passage immediately before an optical sensor, and is provided with a detection output thereof. Power-on detection means for supplying power to the optical sensor, initial value fixing means for fixing the initial value of the counter for starting the operation simultaneously with power-on of the optical sensor, and storage means for storing the initial value fixed by this means. And means for extracting coin outer diameter data from the counter value when the passage of the coin is confirmed and the initial value of the storage means.

In the second invention, when the counter value read out at a constant cycle after the power supply to the optical sensor becomes the same value, this value is fixed as the initial value.

Further, the third invention is such that the counter value read out after the power supply to the optical sensor is turned on is selected according to the length of the reading cycle and the selected data value is fixed as an initial value. .

[Operation] The coin outer diameter data is obtained from the counter value when it is confirmed that the coin has passed and the initial value determined by the initial value determining means.

Further, when the counter value read out in a constant cycle after the power supply to the optical sensor becomes the same value, this value is fixed as the initial value.

Further, the counter value read after the power supply to the photosensor is turned on is selected according to the length of the read cycle, and the selected counter value is fixed as the initial value.

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

FIG. 1 is a block diagram showing an embodiment of a public telephone to which the coin outer diameter data measuring device of the present invention is applied.

This public telephone is connected to line terminals L ₁ and L ₂ to which a telephone line from an exchange is connected, via a hook switch HS ¹ , a billing signal receiving circuit 21, a diode bridge 22, a power supply circuit 23, and a forced disconnection circuit 24. , A call loop is formed and a call circuit 25 is connected to which a handset
Twenty-six transmitters T and receivers R are connected.

In addition, a control unit 27 (equivalent to the CPU 11 in FIG. 7) including a microprocessor and a memory is provided, and the above-mentioned coin processing unit for selecting, accumulating and storing the billing signal receiving circuit 21 and the coin 1. 29, dial key 30, hook switch HS ^2, etc., a coin processing unit 29, a display unit 32, and an MF signal generator for generating an MF signal by making a control judgment according to each output.
33, the call circuit 25 and the forced disconnection circuit 24 are controlled.

The MF signal generator 33 responds to the output of the dial key 30 and the control of the control unit 27 and follows the operation of the dial key 30.
An MF signal is generated and the MF signal is sent out as a dial signal via the communication circuit 25.

On the other hand, the power supply circuit 23 is a hook switch by off-hook.
When HS ¹ is turned on, the DC loop is closed via the communication circuit 25, and as the loop current of constant polarity is passed by the diode bridge 22, the capacitor is charged by this, and the terminal voltage of the capacitor is set as the power supply V. It is to be supplied to each part.

Therefore, in the case of the first-loop system, when the off-hook is performed, the DC loop is closed, and the control unit 27 sends a permission signal in response to the output of the coin processing unit 29 when the coin 1 is inserted, thereby dialing the dial. Dialing with the key 30 is possible, and the call can be made freely by the response of the other party.

Also, when a charging signal such as a reversing pulse arrives from the exchange according to the response of the other party, this is received by the charging signal receiving circuit 21, and a reception output is generated and given to the control unit 27,
In response to this, the control unit 27 controls the coin processing unit 29 to control the coin 1
When the coins that have been inserted and are on standby are running out, the forced disconnection circuit 24 is controlled to open the DC loop for a certain period of time to restore the exchange and forcibly disconnect the call. Has become.

The display unit 32 displays a prompt to insert the coin 1, a shortage of the coin 1, and an indication that the coin 1 cannot be used due to an abnormality in the stored state of the coin 1.

Next, the operation of the coin outer diameter data measuring device for measuring the outer diameter data of the coin 1 inserted into the public telephone which performs the above-mentioned operation will be described based on the flowchart of FIG. Since this coin outer diameter data measuring device performs exactly the same processing for each coin outer diameter sorting sensor, an example of outer diameter data detection by one sensor will be described here. In addition, the processing of the program based on this flowchart is normally performed by the control unit 27 in the sleep state by 3.3 m in order to reduce the power consumption of the public telephone.
It is waked up by an interrupt signal (not shown) every s, and is executed by the control unit 27 in this interrupt process.

When this program is started, the value of the binary counter 10 is read and stored in step 60. And
Initially, since each state flag described later is not set, it is determined as "N" in any of steps 61 to 63, and as a result, coin insertion detection based on the output of the insertion detection sensor 2 is performed in step 64. to decide. If the insertion of the coin 1 is not detected in step 64, the detection is judged again after 3.3 ms after the end.

If the insertion of coin 1 is detected, step 64
In step 65, the state flag “1” is set, and in step 66, the power of the LED for selecting the outer diameter of the coin 1 is turned on, and in step 67. The binary counter 10 is reset and its value is set to "0".

When the status flag "1" is set in this way, the next 3.3m
After s, this program is executed again, and as a result, the value of the binary counter 10 is read and stored in step 60, and the setting of the status flag "1" is determined to be "Y" in step 61. In this case, in step 68, a subroutine of an initial value finalizing process, which will be described later, is executed, the presence or absence of an initial value finalizing flag due to the execution of the initial value finalizing process is detected, and the initial value finalizing determination is made in step 69. Then, if the initial value is not fixed, the process will be terminated and the judgment will be made again in the next 3.3 ms. However, if the initial value is fixed, the initial value is stored in step 70 and the state is stored in step 71. The flag "2" is set and the process ends.

After the status flag "2" is set in this way, the next 3.3m
After s, this program is executed again, and as a result, the value of the binary counter 10 is read and stored again in step 60, and the setting of the status flag "2" is determined to be "Y" in step 62. In this case, in step 72, the determination of the start of measurement of the coin 1 is made by detecting a mismatch between the data value read this time and the data value that has already been stored as the initial value. If the values match,
Although it will be ended and the judgment will be made again in the next 3.3 ms, if these data values do not match, it is judged that the measurement has started (“Y” in step 72), and the step
The data value read this time is stored in 73, and the state flag "3" is set in step 74, and the process ends.

Also, after the status flag “3” is set, the next 3.3ms
When this program is executed again later, the value of the binary counter 10 is read again and stored in step 60, and the setting of the state flag "3" is determined to be "Y" in step 63. And in this case, step 75
In this case, the judgment of the measurement end of this coin 1 is made by detecting the coincidence between the data value read this time and the data value as the already stored initial value, and as a result, if these data values do not coincide with each other. , And it will be judged again after the next 3.3 ms, but if these data values match, it is judged that the measurement has ended (“Y” in step 75), and then this time is read in step 76. The outer diameter data of the coin 1 is calculated and determined from the data value and the already stored initial value, and the power of the LED 3 for selecting the outer diameter of the coin 1 is turned off in step 77, and step 78 To reset the status flag and exit.

Next, FIG. 3 is a flow chart of the initial value fixing process 1 for explaining the first initial value fixing operation in the subroutine of the initial value fixing process described above.

That is, the previous count value stored in advance in the memory in step 80 is read, and the current count value and the current count value read at the beginning of interrupt processing every 3.3 ms (step 60 in the flowchart of FIG. 2). If the coincidence with the count value is determined in step 81, and if they are determined to be the same value, the initial value confirmation flag is set in step 82.

According to this initial value determination method, when the value of the binary counter 10 after turning on the power to the LED3 ₁ becomes the same value, it is decided as the initial value, but the counter value read every 3.3 ms. As shown in Fig. 5, it takes about 10ms (3.3ms × 3) until the data is confirmed. After the coin 1 is inserted, the coin 1 causes the coin outer diameter sorting sensor 3 to be 10ms or more. It is extremely effective in a device that passes by. However, after inserting coin 1, coin 1
It is conceivable that outer diameter sorting cannot be performed with a device that passes the coin outer diameter sorting sensor 3 in less than 10 ms. FIG. 4 is a flow chart for explaining the second initial value fixing operation applied to such an apparatus.

LED3 ₁ previously stored in memory in step 90 ₁
The value of the read cycle (read cycle) of the count value after the power is turned on is read from the memory, and in step 91 it is determined whether the read cycle is 4 ms or more. When it is determined to be "Y", the data 1 (that is, the count value read this time) is set as the initial value in step 92, the initial value confirmation flag is set in step 93, and the process ends.

If the value of the read cycle is not 4 ms or more, it is determined as “N” in step 91. In this case, the next step is
At 94, it is judged whether or not the value of the read cycle is between 4ms and 2ms, and if it is between these, at step 95, the data 2, that is, the count value read at the next interrupt is set as the initial value. In step 93, the initial value confirmation flag is set, and the process ends.

Further, when the value of the read cycle does not correspond to any of these and is determined to be “N” in step 91 and step 94, the above-described initial value fixing process 1 is executed in step 96.

Thus, among 2~4ms from power-on is detected in the LED 3 ₁ coin 1 is turned on, as shown in FIG. 5,
Since the count value of the binary counter 10 does not become a constant value, the count value read from the binary counter 10 during this period is not used as the initial value, the counter of the binary counter 10 has passed 4ms from more than LED 3 ₁ of the power supply is turned on The count value read after the value becomes a constant value is used as an initial value. As a result, after the coin 1 is inserted, the coin 1 moves the coin outer diameter selection sensor 3 for 10 ms.
The outer diameter of the coin can be sufficiently selected even in a device that passes through the following.

[Effects of the Invention] As described above, the coin outer diameter data measuring device according to the present invention obtains coin outer diameter data from the counter value at the time of confirming the passage of coins and the initial value determined by the initial value determination means. Since the initial value X is taken out as a fixed value, even if the initial value X fluctuates due to variations in elements, aging, etc., the initial value corresponding to this can be determined and an accurate coin can be obtained. There is an effect that the outer diameter can be selected.

Further, when the counter value read out at a constant cycle after the power supply to the optical sensor becomes the same value, this value is set as the initial value, so that the initial value can be set accurately. .

Also, the counter value read after the power supply to the optical sensor is selected according to the length of this read cycle to be fixed as the initial value, so that the inserted coin causes the coin outer diameter sorting sensor to operate at a high speed. There is an effect that the outer diameter of the coin can be reliably selected even in a device that passes by the.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a public telephone to which a coin outer diameter data measuring device according to the present invention is applied, and FIGS. 2 to 4 are flow charts for explaining the operation of this device, and FIG.
FIG. 6 is a diagram for explaining the operation of the binary counter in this device, FIG. 6 is a block diagram of a conventional coin outer diameter data measuring device,
FIG. 7 is a block diagram of this device, FIG. 8 is an operation explanatory diagram for explaining the operation of the conventional device, and FIG. 9 is a diagram for explaining the operation of the binary counter in the conventional device. 1 …… Coin, 2 …… Insertion detection sensor, 3 …… Coin outer diameter sorting sensor, 3 _{1 to} 3 ₃ …… Coin outer diameter sorting LED, 3 _{4 to} 3 ₆ ……
Coin outer diameter sorting phototransistor, 10 …… Binary counter, 11 …… CPU, 27 …… Control section, 29 …… Coin processing section, R
ST …… Reset signal, CK …… Clock signal.

Claims (3)

[Claims] 1. A counter for counting a clock signal by a counter while a coin is passing through an optical sensor provided in a coin rolling passage and reading the contents of the counter at a constant cycle to confirm the passage of the coin. In the coin outer diameter data measuring device for extracting the content of as the outer diameter data, an input detecting means which is provided in the coin rolling passage immediately before the optical sensor and which supplies power to the optical sensor by its detection output,
Initial value fixing means for fixing the initial value of the counter, which starts the operation once when the power supply to the optical sensor is turned on, storage means for storing the initial value fixed by this means, and when the passage of coins is confirmed. A coin outer diameter data measuring device comprising: means for extracting coin outer diameter data from a counter value and an initial value of a storage means. 2. The coin outer diameter data measuring device according to claim 1, wherein the initial value fixing means sets the value of the counter read at a constant cycle after the power supply to the optical sensor to the same value. The coin outer diameter data measuring device is characterized in that the counter value is fixed as an initial value when the coin has reached the limit. 3. The coin outer diameter data measuring device according to claim 2, wherein the initial value fixing means selects a counter value read after powering on the optical sensor according to the length of the reading cycle. In addition, the coin outer diameter data measuring device is characterized in that the selected counter value is fixed as an initial value.