JPS6258995B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a refueling device.

Gasoline and other refueling devices display the amount of refueling, the amount of refueling, or both.Usually, the amount of refueling is displayed in 1/100 liter, and the amount of refueling is displayed in 1 yen, each as a unit price. It can be done. The amount of refueling is due to the calculation of the refueling amount.1
It is preferable that there are no fractions less than a liter, and that the amount of refueling does not have any fractions in the 1 yen digit due to change, etc. Therefore, with normal refueling devices, the amount of refueling or Refueling is stopped (just stopped) based on the amount of money.

By the way, at gas stations, there are generally two types of customers: those who pay in cash (cash customers) and those who sell on credit.Most of the customers who require a relatively small amount of fuel, such as mini bikes, are cash customers; Customers who require a relatively large amount of refueling, such as for cars, are far more likely to be credit customers than cash customers.

The present invention is capable of precisely stopping refueling at a predetermined digit, e.g., 1 yen, with no fractions, and
It is an object of the present invention to provide a refueling device that can selectively switch between stopping refueling at a fractional amount in the liter digit and stopping at a predetermined refueling amount, for example, 3 liters, or a predetermined refueling amount, for example, 500 yen. It is something to do.

That is, the oil supply device of the first invention of the present application includes a flowmeter that measures oil pumped by a pump, a flow rate pulse generator that generates a flow rate pulse corresponding to a measurement unit flow rate of this flowmeter, and a flow rate pulse generator that measures the oil pumped by a pump. a plurality of flow rate pulse counters that count the number of flow rate pulses generated from the device for each digit; a means for converting the flow rate pulses into monetary pulses based on a refueling unit price; and a plurality of flow rate pulse counters that count the number of monetary pulses for each digit. and a detector that detects and generates a detection signal when a certain number of fluctuations in the cycle of the flow rate pulse occur during a certain period of time, and the generation of the detection signal of the detector In a device that is designed to stop refueling without causing a fraction in a predetermined digit of the refueling amount or refueling amount as a condition, the refueling amount is monitored and a monitoring signal is generated when it exceeds a predetermined value. means for selecting a count signal or a carry signal of a counter corresponding to a predetermined digit among the plurality of flow rate pulse counters when the monitoring signal is generated; means for selecting a count signal or carry signal of a counter corresponding to a predetermined digit of the amount pulse counter, and a count signal or digit of the selected flow rate pulse counter or amount pulse counter on the condition that the detection signal is generated; This system also includes means for stopping refueling based on the increase signal.

Furthermore, the refueling device of the second invention monitors the amount of refueling and detects the amount of refueling, instead of the means of monitoring the amount of refueling and generating a monitoring signal when the amount exceeds a predetermined value in the first invention. It is provided with means for generating a monitoring signal when a predetermined value is exceeded.

If the measuring unit of the flow meter is 1/100 liter of oil, the flow pulse generator generates one pulse (1/100 pulse) every time the flow meter measures 1/100 liter. The lowest digit pulse counter among the multiple flow rate pulse counters counts these 1/100 pulses, outputs a count signal every time it counts 1 pulse, and when it counts 10 pulses, carries a carry signal (1/10
The flow rate pulse counter of the next higher digit counts this carry signal, outputs a count signal every time it counts 1 pulse, and outputs a carry signal (1 pulse) when counting 10 pulses. In this way, the flow rate pulse counter of the higher order digit is reached.

On the other hand, the flow rate pulse is converted into a monetary pulse, for example, a 1 yen pulse, depending on the set unit price of oil. These amount pulses are counted by a plurality of amount pulse counters sequentially from the lower digits to the higher digits in the same manner as the flow rate pulses.

When the amount of refueling is less than a predetermined value, e.g. 3 liters (in the case of the first invention), or the amount of refueling is less than a predetermined value, e.g. 500 yen (in the case of the second invention), the monitoring signal is activated. is not generated, the selection means selects the count signal or carry signal of the amount pulse counter.

When the amount of refueling or the amount of refueling exceeds a predetermined value, for example 3 liters or 500 yen, a monitoring signal is generated, and the selection means selects the count signal or carry signal of the flow rate pulse counter.

After receiving the detection signal from the detector, the refueling stop means stops the pump drive motor when receiving the next count signal or carry signal from the amount pulse counter or flow rate pulse counter.

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

In Figure 1, 1 is a refueling nozzle (not shown)
a flow meter for measuring the amount of oil supplied through the 2
is a flow rate pulse transmitter, for example, one flow pulse (1/100
pulse).

C ₁ is a decimal flow rate pulse counter, and transmitter 2
Steps in response to 1/100 pulse from and outputs count
e ₁ (1/100 counting signal) and 10
When counting 1/100 pulses, carry pulse E ₁
(1/10 pulse) is output.

C ₂ , C ₃ , C ₄ , and C ₅ are also decimal flow rate pulse counters, and the carry pulses of the previous counters, that is, 1/10 pulse E ₁ and 1 pulse, respectively.
E ₂ , 10 pulses E ₃ , 100 pulses E ₄ are received, and the count outputs e ₂ (1/10 count signal), e ₃ (1 count signal), e ₄ (10 count signal), e ₅ ( 100 count signal) and receives 10 input pulses (carry pulses _{of the previous counter), carry pulses E 2 ,} E ₃ ,
Generates E ₄ .

The count signals e ₁ to _{e 5} of the flow rate pulse counters C ₁ to _{C 5} are respectively input to the display drive circuit 3, and the count values are sequentially displayed on the oil supply amount display 4.

5 is a fuel unit price setting device, which sets the unit amount (for example, 1 liter) price (for example, regular gasoline 170
yen). This unit price is displayed on the unit price display 7 via the display drive circuit 6.

8 is an arithmetic circuit which receives the flow rate pulse from the transmitter 2, performs arithmetic processing on the unit set by the unit price setter 5, and outputs an amount pulse (1 yen pulse).

C ₁ ' is a decimal amount pulse counter and the calculation circuit 8
Steps in response to 1 yen pulse from and outputs count
e ₁ ′ (1 yen count signal) and counts 10 1 yen pulses, a carry pulse E ₁ ′ (10
outputs a circular pulse).

C ₂ ′, C ₃ ′, C ₄ ′, and C ₅ ′ are also decimal amount pulse counters, and the carry pulse of the previous stage counter, that is, the 10 yen pulse E ₁ ′ and the 100 yen pulse, respectively
E ₂ ′, 1000 yen pulse E ₃ ′, 10000 yen pulse E ₄ ′, steps forward and outputs counting e ₂ ′ (10 yen counting signal),
e ₃ ′ (100 yen counting signal), e ₄ ′ (1000 yen counting signal),
e ₅ ′ (10,000 yen counting signal) is generated, and 10
When receiving input pulses (carry pulses of the previous counter), each of the counters generates carry pulses E ₂ ′, E ₃ ′, and E ₄ ′, except for counter C ₅ ′.

Amount pulse counter C ₁ ′ to C ₅ ′ count signal e ₁ ′ to
_e5 ' is input to the display drive circuit 3', and the counted value is displayed on the refueling amount display 4'.

Reference numeral 9 denotes a pre-operation detection circuit that detects an operation performed by a refueling operator (hereinafter referred to as pre-operation) just to stop the fuel, and receives a 1/100 pulse from the flow rate pulse generator 2, and for example, if the period of this pulse is If it fluctuates more than a certain number of times (for example, twice) within a certain period of time (for example, one second), a detection output a is generated. A pre-operation for just stopping is, for example, repeatedly squeezing and releasing the operating lever of the built-in valve of the refueling nozzle in a short period of time to repeatedly close the built-in valve (throttling or tightening). ), and as this changes the refueling flow rate (flow velocity), the period of the 1/100 pulse from the transmitter 2 changes, so the detection circuit 9 detects this change in period and outputs the output signal (1 pulses) a are generated. Signal a is applied to a selection circuit 10, which will be described later.

11 is a monitoring circuit, which includes a flow rate pulse counter C ₁ ~
C ₅ count signals e ₁ to _{e 5} are received, and the count values (oil supply amount) of these counters are set to the switching amount setting device 12,
For example, it is monitored whether or not the value exceeds 3(), and when the value exceeds 3(), a monitoring signal b is generated and applied to the selection circuit 10. That is, the monitoring circuit 11 monitors whether the amount of refueling exceeds a predetermined set value (3 in the above example) after the start of refueling. Note that the signal b continues until a reset signal (nozzle signal H), which will be described later, is input.

13 is a determination circuit, which compares the count outputs e ₁ to e ₃ from the flow rate pulse counters C ₁ to C ₃ and the set value of the stop digit setter 14, and stops every time both input values match. A signal (one pulse) d is generated. 1
3' is a determination circuit, which compares the count outputs _e1 ' to _e3 ' from the amount pulse counters _C1 ' to _C3 ' and the set value of the stop digit setter 14' in the illustrated example, and compares both input values. A stop signal (one pulse) d' is generated every time the numbers match.

Since pump motors and pumps have inertia, for example, the amount of oil supplied (exact amount of oil supplied) or 1 yen with no fractions in the digits less than 1 liter (both 1/10 liter and 1/100 liter digits are zero) In order to stop refueling exactly at a refueling amount (exact refueling amount) with no fraction (zero) in the digit, it is necessary to de-energize the pump motor just before the refueling amount or just before the refueling amount in anticipation of an overrun. be.

Now, if we assume that the amount of excess oil due to overrun is 0.08 liters or 4 yen, the stop digit setting device 14 will read . 92 (little) and the stop digit setter 14'
Set 6 (yen) for each. Therefore, the determination circuits 13 and 13' each have a counter.
Each time the count signals of C ₂ , C ₁ to 9, 2 and counters C ₁ ' to 6 are received, signals d and d' are generated, respectively.

When the signal b from the monitoring circuit 11 is not input to the selection circuit 10 (while the refueling amount has not reached 3 in the above example after the start of refueling), the selection circuit 10 selects the pre-operation detection circuit 9.
When receiving the signal a from the determination circuit 13', and then receiving the signal d' from the determination circuit 13' (when the 1 yen digit of the refueling amount is 6 yen in the above example), the signal f is generated and the motor control circuit 15 to deenergize the pump motor M. In the above example, the motor M (therefore, the pump) rotates for another 4 yen and then stops due to inertia, so the refueling is stopped exactly at the amount with no fraction (zero) in the 1 yen digit (for example, 240 yen).

If the signal b from the monitoring circuit 11 is input to the selection circuit 10 (in the above example, the amount of refueling after the start of refueling is 3)
When the signal a from the pre-operation detection circuit 9 is received, and then when the signal d from the determination circuit 13 is received (when the oil supply amount is less than 1 and becomes .92 in the above example) ), a signal f is generated and applied to the motor control circuit 15 to deenergize the pump motor M. In the above example, the motor M (and hence the pump) will rotate for another 0.08 minutes and then stop due to inertia, so the amount of oil to be supplied must be zero (zero), for example, 12.00.
Refueling is just stopped at Little.

Reference numeral 16 denotes a refueling nozzle detection switch, which is disposed in relation to, for example, a nozzle case provided in the housing of the refueling device, and is operated in response to the refueling nozzle being connected to or removed from the nozzle case, and its output changes. For example, when the refueling nozzle is removed from the nozzle case, the output signal (nozzle signal) of the nozzle detection switch 16 becomes high level (H), and when the nozzle is hung on the nozzle case, the nozzle signal becomes low level (L). The nozzle signal L→H is applied to the motor control circuit 15 to energize the pump motor M, and is also applied to the counters C ₁ to C ₅ and C ₁ ′ to _{C 5} ′ and the monitoring circuit 11 to return or reset them. do.

In the embodiment shown in FIG. 1, the monitoring circuit 11 monitors the count values of the flow rate pulse counters _C1 to _C5 , and switches between stopping at the amount of refueling and stopping at the amount of refueling, based on a fixed amount of refueling (for example, 3 liters). However, this switching is performed at a fixed refueling amount (for example,
500 yen) is also possible. Second
The figure shows the circuit configuration in that case. In FIG. 2, 11' is a monitoring circuit, and 12' is a switching amount setter, which correspond to 11 and 12 in FIG. 1, respectively, and the other components are the same as in FIG. Since the operation in FIG. 2 can be easily understood from FIG. 1, the explanation will be omitted.

The present invention is not limited to the illustrated embodiment and can be modified in various ways.

For example, in the illustrated embodiment, the count outputs of the counters C ₁ to C 3 and C _{1 '} to C ₃ ' are inputted to the refueling stop refueling amount detection circuit 13 and the refueling stop amount detection circuit 13', respectively. Then, the amount without fractions in the desired digit less than 1 liter, such as 20.00 liters, 15.00 liters, 11.50 liters (in these cases, the setting value on the setting device 14 is, assuming that the pump overrun is 0.08 (liters),
9.92 each. 92、． 02) and the amount of the whole amount in the desired digit below the 100 yen digit, such as 11000 yen, 1400 yen, 230 yen (in these cases, the set value on the setting device 14' If the overrun of is 4 (yen), then each
996, 96, 6) is possible, but the counters C ₄ or C ₄ and C ₅ and C ₄ ' or
C ₄ ′ and C ₅ ′ are also detected by the detection circuits 13 and 13 ′, respectively.
10 liter digit and by connecting to
It is also possible to stop exactly at an amount or amount with no fractions in the digits of 1000 yen or more.

In addition, in the illustrated example, all counting signals _C1 to _C5 or _C1 ' to _C5 ' are input to the monitoring circuit 11 or 11', respectively, but in some cases, the upper digits may be input to the monitoring circuit 11 or 11'. For example, C ₅ , C ₄ , C ₅ ′,
The count output of C ₄ ' may not be input to the circuits 11 and 11'.

Further, in the illustrated embodiment, the refueling amount is stopped exactly when a small amount of refueling is performed, and the refueling amount is stopped exactly when a large amount of refueling is performed, but the selection circuit 10
It is also possible to configure the system in the opposite manner, that is, to stop the refueling amount exactly when refueling a small amount of refueling, and to stop exactly the amount of refueling when refueling a large amount of refueling.

To stop the oil supply, in addition to deenergizing the pump motor, a solenoid valve disposed in the oil flow path may be closed. In this case, consideration will be given to overruns of the motor or pump with respect to the delay in actuation of the solenoid valve.

As described above, according to the present invention, it is possible to effectively refuel without fractions in the lower digits of the amount of refueling or the amount of refueling depending on the object to be refueled.

[Brief explanation of the drawing]

FIGS. 1 and 2 are block diagrams showing schematic configurations of different embodiments of the present invention. 1...Flowmeter, 2...Flow rate pulse transmitter, 4...
...Refueling amount display, 4'...Refueling amount display, 5...
...Unit price setter, 7...Unit price display, 8...Arithmetic circuit, 9...Pre-operation detection circuit, 10...Selection circuit, 11, 11'...Monitoring circuit, 12...Switching amount setter, 12'...Switching amount setting device, 13,1
3'...Judgment circuit, 15...Motor control circuit, 1
6...Nozzle detection switch, _C1 ~ _C5 , C1 _' ~ _C5 '...
...Pulse counter.

Claims (1)

[Claims] 1. A flow meter that measures oil pumped out by a pump;
A flow rate pulse generator that generates a flow rate pulse corresponding to the measurement unit flow rate of the flowmeter; a plurality of flow rate pulse counters that count the number of flow rate pulses generated from the flow rate pulse generator for each digit; a means for converting into a monetary pulse based on a refueling unit price; a plurality of monetary pulse counters that count the monetary pulse number for each digit; and a detector that detects and generates a detection signal, and the refueling is stopped without causing a fraction in a predetermined digit of the refueling amount or refueling amount on the condition that the detection signal of this detector is generated. means for monitoring the amount of oil supplied and generating a monitoring signal when the amount exceeds a predetermined value; means for selecting a counting signal or a carry signal of a corresponding counter, and selecting a counting signal or a carry signal of a counter corresponding to a predetermined digit among the plurality of amount pulse counters when the monitoring signal is not generated; , means for stopping refueling based on the count signal or carry signal of the selected flow rate pulse counter or amount pulse counter on condition that the detection signal is generated. 2. A flow meter that measures the oil pumped out,
A flow rate pulse generator that generates a flow rate pulse corresponding to the measurement unit flow rate of the flowmeter; a plurality of flow rate pulse counters that count the number of flow rate pulses generated from the flow rate pulse generator for each digit; a means for converting into a monetary pulse based on a refueling unit price; a plurality of monetary pulse counters that count the monetary pulse number for each digit; and a detector that detects and generates a detection signal, and the refueling is stopped without causing a fraction in a predetermined digit of the refueling amount or refueling amount on the condition that the detection signal of this detector is generated. means for monitoring the refueling amount and generating a monitoring signal when it exceeds a predetermined value; and a means for generating a monitoring signal when the amount exceeds a predetermined value; means for selecting a counting signal or a carry signal of a corresponding counter, and selecting a counting signal or a carry signal of a counter corresponding to a predetermined digit among the plurality of amount pulse counters when the monitoring signal is not generated; , means for stopping refueling based on the count signal or carry signal of the selected flow rate pulse counter or amount pulse counter on condition that the detection signal is generated.