JPS6258994B2 - - Google Patents

Description

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

Gasoline refueling devices display the amount of refueling, but the unit price is usually 1/100 liter.

By the way, in order to calculate the refueling amount, it is preferable that the amount of refueling does not include any fractions less than 1 liter.In a normal refueling device, refueling is automatically stopped (just stop) at the amount of refueling that does not include any fractions less than 1 liter. manually or manually.

However, if the automatic exactly stop unit is set to one value,
For example, a refueling device that is fixed at 1 liter is not suitable for use when refueling objects such as motorbikes, which normally require a small amount of refueling. For example, until full
If the machine stops at just 2 liters of fuel, even though it can refuel 2.9 liters, not only will it not be able to meet customer demands, but sales will also decrease accordingly.

In view of the above points, the present invention proposes a refueling device that can automatically change the automatic stop unit amount between small-quantity refueling and large-volume refueling.

That is, the oil supply device of the present invention includes a flowmeter that measures the oil pumped out by a pump, a flow pulse transmitter that generates a flow pulse corresponding to the oil volume measured by the flow meter, and a flow pulse transmitter that generates a flow pulse corresponding to the oil volume measured by the flow meter. It has a plurality of pulse counters that count the number of generated flow rate pulses for each digit, and a detector that detects when fluctuations in the period of the flow rate pulse occur a certain number of times within a certain period of time and generates a detection signal. In a device that is designed to stop refueling without causing a fraction to a predetermined digit of the refueling amount based on the detection signal of this detector, when the refueling amount is monitored and it exceeds the predetermined value. means for generating a supervisory signal; and when the supervisory signal is generated, a count signal or a carry signal of a counter corresponding to a relatively high-order digit among the plurality of pulse counters is selected, and the supervisory signal is not generated. means for selecting a count signal or a carry signal of a counter corresponding to a relatively lower digit among the plurality of pulse counters, and a means for selecting a count signal or a carry signal of the selected counter based on the detection signal. This system also includes a means for stopping refueling based on the timing.

If the measurement unit of the flowmeter is 1/100 liter of oil, the flow rate pulse transmitter emits one pulse (1/100 pulse) every time the flowmeter measures 1/100 liter. Then, the pulse counter with the lowest digit among the multiple pulse counters counts these 1/100 pulses, and generates a count signal every time it counts 1 pulse, and when it counts 10 pulses, it generates a carry signal (1/10 pulse ), the pulse counter of the next higher digit counts this carry signal, generates a count signal every time it counts 1 pulse, and outputs a carry signal (1 pulse) when 10 pulses are counted. In this way, the pulse counters of higher digits are reached sequentially.

Since no monitoring signal is generated while the amount of oil supplied is less than a predetermined value, for example 3 liters, the selection means selects the count signal or carry signal of a counter that counts lower digits, for example 1/100 liter pulses. The refueling stop means stops the drive motor of the pump when receiving the next count signal or carry signal from the 1/100 liter pulse counter after receiving the detection signal from the detector.

When the amount of refueling exceeds a predetermined value, for example, 3 liters, the monitoring signal is generated, and the selection means selects the count signal or carry signal of a counter that counts the next higher digit, for example, 1/10 liter pulse. do. The refueling stop means stops the drive motor of the pump when receiving the next count signal or carry signal from the 1/10 little pulse counter after receiving the detection signal from the detector.

Therefore, according to the present invention, when the amount of refueling is less than 3 liters, the stop unit amount can be set to, for example, 1/10 liter, and when the amount of refueling is 3 liters or more, the stop unit amount can be set to 1 liter, for example. It's getting old.

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

In the figure, 1 is a flowmeter that measures the amount of oil supplied through an oil supply nozzle (not shown), and 2 is a flow pulse transmitter, for example, which measures the measured value by the flowmeter.
Every 1/100 liter generates one flow pulse (1/100 pulse).

C ₁ is a decimal counter, 1/100 from transmitter 2
Upon receiving the pulse, it advances and generates a count output e ₁ (1/100 count signal), and when it counts 10 1/100 pulses, it outputs a carry pulse E ₁ (1/10 pulse).

C ₂ , C ₃ , C ₄ , and C ₅ are also decimal counters,
The carry pulse of the previous counter, that is, each
1/10 pulse E ₁ , 1 pulse E ₂ , 10 pulse
E ₃ , receives 100 pulses E ₄ and steps to output count e ₂
(1/10 counting signal), e ₃ (1 counting signal), e ₄ (10
Counting signals), e ₅ (100 counting signals) are generated, and when ₁₀ input pulses (carry pulses of the previous counter) are received, carry pulses E ₂ , E ₃ , Generates E ₄ .

The count signals e ₁ to e ₅ of the counters C ₁ to C ₅ are input to the display drive circuit 3, respectively, and the count values are sequentially displayed on the display 4.

Reference numeral 5 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 it 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, closing (squeezing) or opening the built-in valve repeatedly by repeatedly grasping and releasing the operating lever of the built-in valve of the refueling nozzle in a short period of time. This operation changes the oil supply flow rate (flow velocity), so it is 1/10 of the flow rate from transmitter 2.
Since the period of the 0 pulse changes, the detection circuit 5 detects this change in period and generates an output signal (one pulse) a. Signal a is given to determination circuit 6, which will be described later.

7 is a monitoring circuit that outputs the count signal _e3 of 1 counter _C3 .
Then, it is monitored whether the counted value (oil supply amount) of the counter _C3 exceeds the set value of the setting device 8, for example, 3(), and when it exceeds the set value, a monitoring signal B is generated. That is, the monitoring circuit 7 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.

9 is a selection circuit which receives the carry signal E ₁ (1/10 pulse) of the 1/100 counter C ₁ and the carry signal E ₂ (1 pulse) of the 1/10 counter C ₂ , and receives the signal from the monitoring circuit 7. When b is not input (as long as the refueling amount has not reached 3 in the above example after refueling has started), signal E ₁ (1/10 pulse) is given to the judgment circuit 6, and signal b is input. When (the amount of oil supplied is 3
2), the signal E ₂ (1 pulse) is given to the judgment circuit 6.

After receiving the detection signal a from the pre-operation detection circuit 5, the determination circuit 6 receives the signal (1/10) from the selection circuit 9.
When a pulse or one pulse is received, a signal c is generated, and this signal c is applied to the motor control circuit 10 to deenergize the pump motor M of the refueling machine and stop refueling.

Therefore, the oil supply is stopped exactly at the oil supply amount not fractional to the 1/100th digit, or at the oil supply amount not fractional to the 1/10th and 1/100th digit.

In other words, after the start of refueling, the amount of refueling is constant (3 in the above example).
) until the monitoring signal b from the monitoring circuit 7 is reached.
does not exist, the selection circuit 9 gives the 1/10 pulse from the counter C ₁ to the judgment circuit 6, and after receiving the detection signal a from the pre-operation detection circuit 5, the selection circuit 9 gives the next 1/10 pulse. Since signal c is generated by pulse input to stop motor M, oil supply is reduced to 1/10.
It will be stopped at a refueling amount with no fraction in the 0 digit (for example, 2.80).

After the refueling starts and exceeds the fixed refueling amount (3 in the above example), the monitoring signal b from the monitoring circuit 7 is sent to the selection circuit 9.
Therefore, the selection circuit 9 gives one pulse from the counter _C2 to the judgment circuit 6, and the selection circuit 9
After receiving the detection signal a from the front operation detection circuit 5, the input of the next pulse generates the signal c to stop the motor M, so the oil supply is performed at both 1/10 and 1/100. It will be stopped at the refueling amount (for example, 15.00) with no fraction in the digit.

Reference numeral 11 denotes a refueling nozzle detection switch, which is disposed in association with, for example, a nozzle case provided in the housing of the refueling device, and is operated in response to the connection or disconnection of the refueling nozzle to or 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 11 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 10 to energize the pump motor M, and is also applied to the counters C ₁ -C ₅ and the monitoring circuit 7 to return or reset them to zero.

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

For example, the number of digits displayed on the display 4 is not limited to the five digits shown in the figure, and the number of digits above or below the decimal point is not limited to the illustrated example. Furthermore, the number of digits without a fraction at exactly the stop is not limited to the embodiment.

The displayed numerical value may be the refueling amount instead of or in addition to the refueling amount, and in this case, for example, the 10 yen digit or the 100 yen digit or less can be set to zero.

The oil supply may be stopped by deenergizing the pump motor or by closing a solenoid valve disposed in the oil flow path.

In the illustrated embodiment, the determination circuit 6 includes counters C ₁ and C ₂
Carry signal E ₁ (1/10 pulse) or E ₂ (1
However, when considering overrun of the motor or pump, the judgment circuit 9 uses the count signals e ₁ or e ₂ of the counters C ₁ and C ₂ to deenergize the motor M. The receiving motor M may be deenergized. For example, counter
When the count signal e ₁ of C ₁ (or C ₂ ) becomes 9/100 (little) (or e ₂ becomes 9/10 (little)), the determination circuit 6 gives the signal c to the motor control circuit 10. The motor M may be deenergized and the remaining 1/100 liter (or 1/10 liter) may be supplied by the inertia of the motor (or pump).

As described above, according to the present invention, it is possible to effectively refuel at full capacity without any fraction in the lower digits of the refueling amount in both small and large amounts of refueling using one refueling device.

[Brief explanation of the drawing]

The figure is a block diagram showing a schematic configuration of an embodiment of the present invention. 1...Flowmeter, 2...Flow rate pulse transmitter, 4...
...Display device, 5... Front operation detection circuit, 6... Judgment circuit, 7... Monitoring circuit, 8... Setting device, 9... Selection circuit, 11... Nozzle detection switch, C ₁ to C ₅
...Pulse counter, M...Pump motor.

Claims (1)

[Claims] 1. A flow meter that measures the oil pumped out,
A flow rate pulse transmitter that generates flow pulses corresponding to the measuring unit oil amount of the flowmeter, a plurality of pulse counters that count the number of flow rate pulses generated from the flow rate pulse transmitter for each digit, and and a detector that detects when a periodic fluctuation occurs a certain number of times within a certain period of time and generates a detection signal,
In a device that stops refueling without causing a fraction to a predetermined digit of the refueling amount based on the detection signal of this detector, the refueling amount is monitored and monitored when it exceeds a predetermined value. means for generating a signal, and when the supervisory signal is generated, selecting a count signal or a carry signal of a counter corresponding to a relatively high-order digit among the plurality of pulse counters, and when the supervisory signal is not generated; means for selecting a count signal or carry signal of a counter corresponding to a relatively lower digit among the plurality of pulse counters, and a means for selecting a count signal or carry signal of the selected counter with the detection signal as a condition; A refueling device characterized in that it is also equipped with means for stopping refueling.