JPS6330236B2 - - Google Patents

Description

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

In a refueling device that generates a pulse (flow rate pulse) corresponding to the amount of refueling and calculates and displays the refueling amount based on this flow rate pulse and the refueling unit price, the refueling unit price is set using a mechanical contact type such as a digital switch. A unit price setting device using a switch is often used. With such mechanical contact type switches, the unit price may change arbitrarily due to poor contact in the contacts after years of use, and even if it is not due to poor contact, the unit price may change due to electrical noise. This may cause a disadvantage to the customer or the filling station.

The present invention provides a refueling device that solves these problems, and includes a pulse generator that generates a number of flow pulses corresponding to the amount of refueling, a unit price setting circuit that sets a unit price for refueling, and the unit price setting circuit. a first memory circuit that stores the refueling unit price at the current refueling time set to , a second memory circuit that stores the refueling unit price at the refueling time stored in the first memory circuit, and a second memory circuit that stores the refueling unit price at the time of refueling stored in the first memory circuit; an arithmetic circuit that calculates a refueling amount based on the refueling unit price at the current refueling time stored in a memory circuit; a display that displays at least the refueling amount; and a tolerance setting device that sets a tolerance for change in the refueling unit price; Compares the refueling unit price for the current refueling stored in the first storage circuit with the refueling unit price for the previous refueling stored in the second storage circuit, and outputs a signal when there is a difference other than the tolerance between the two unit prices. The present invention is characterized in that it includes a comparison circuit that performs the following steps.

The illustrated embodiment will be described below.

In FIG. 1, 1 is a housing of a refueling device;
Reference numeral 2 denotes an oil supply pump which is rotationally driven by a motor 3 to pump up oil from an underground oil storage tank (not shown) through a pumping pipe 4 and forcefully send it to oil supply pipes 5 and 7.

Reference numeral 6 measures the amount of oil supplied by a flow meter interposed between the oil feed pipes 5 and 7, and drives the pulse generator 15 to output a pulse (flow rate pulse) corresponding to the amount of oil supplied. 8
is an elbow, 9 is a refueling hose, 10 is a refueling nozzle,
11 is a nozzle case, and 14 is a nozzle detection switch, which is operated when the nozzle is connected or disconnected.The signal (nozzle signal) C from the nozzle switch 14 rises (L→
H), when the nozzle 10 is housed in the case 11, it falls (H→L).

12 is a bypass path of the pump 2 interposed between the pumping pipe 4 and the oil supply pipe 5, and a relief valve 13 is inserted therein.

Reference numeral 16 denotes a control section, and an example of its configuration is as shown in FIG. 17 is a digital switch type refueling unit price setting device attached to the outer surface of the housing 1;
18 is a similar type of tolerance setter. 19 is a display section.

When the nozzle 10 is removed from the nozzle case 11, the nozzle signal C from the nozzle switch 14 rises as described above.
8, the arithmetic circuit 30 and the counting circuit 31 are reset, and the motor 3 is rotated at a reduced speed via the motor control circuit 27.

The rising edge of the nozzle signal C is also input to the first memory circuit 23 and the second memory circuit 29, so that the first memory circuit 23 receives the set unit price from the unit price setting circuit 22, and the second memory circuit 29 receives the 1. The memory contents of the memory circuit 23 are taken in. According to the invention, here:
The second storage circuit 2
It is a little later than the import timing of 9. In other words, after the second memory circuit 29 takes in the memory content of the first memory circuit 23, that is, the refueling unit price at the previous refueling (referred to as the previous unit price) due to the rise of the nozzle signal C, the first memory circuit 23 is adapted to take in the memory contents of the unit price setting circuit 22, that is, the refueling unit price (current unit price) for the current refueling.

The current unit price stored in the first storage circuit 23 is displayed on the unit price display 35 via the display drive circuit 34 and is also provided to the arithmetic circuit 30.

Further, the previous unit price and the current unit price stored in both memory circuits 29 and 23 are compared by the comparison circuit 28, and if there is a difference between the two unit prices other than the tolerance described later, the comparison circuit 28 outputs a signal A. Output. That is, if the refueling unit price changes between the previous refueling time and the current refueling time for some reason, the comparison circuit 28 detects this change in the unit price and outputs a signal A.

The output signal A from the comparator circuit 28 is input to the display drive circuits 34 and 36, and the displayed numbers on the unit price display 35 and refueling amount display 37 blink to notify that the current unit price is different from the previous unit price. do. The output signal A is also guided to the output end 21,
A buzzer or a speaker (not shown) connected to this output terminal 21 is operated to notify that the unit value has changed. As the notification means, not only sound but also visual means may be used.

24 is a tolerance setting circuit operated by the tolerance setting device 18, and a comparison circuit 28 is connected to both memory circuits 2.
3. This is a circuit that gives the tolerance difference between both unit prices when comparing the stored contents of 29 (current unit price and previous unit price),
Even if there is a difference between the two unit prices, the comparator circuit 28 does not output the signal A if the difference is within the tolerance. For example "0"
If the difference between the unit prices of both memory circuits 23 and 29 is other than "0", for example, even if the difference is 1 (yen), the comparator circuit 28 will output signal A, and the difference between the unit prices of both memory circuits 23 and 29 will be "0". ”, signal A is not output.

Further, for example, if the refueling unit price is to be changed by 10 yen between daytime and nighttime, "10" is set as the allowable value in the setting device 18. In this case, the unit price will be changed from 150 yen to 160 yen.
Or even if you change it to 140 yen, signal A will not be output.
However, if the unit price changes from 150 yen to 155 yen or 148 yen, signal A is output. Furthermore, in the case of the tolerance setting value "10", the comparator circuit 2
8 can also be configured. Such a configuration of the comparison circuit 28 is useful for a gas service station that frequently changes unit prices depending on the time.

If the unit price changes frequently, the switch 20 can be opened to disconnect the unit price display drive circuit 34 and the fuel supply amount display drive circuit 36 from the power source S. In this case, the only display is the amount of oil supplied on the oil amount display 33.

As mentioned above, when the nozzle 10 is removed from the nozzle case 11, the nozzle signal C from the nozzle switch 14
The motor 3 starts to rotate at a reduced speed due to the rise of .

When the tip of the nozzle 10 is inserted into the refueling port and the lever of the nozzle is pulled, the rotation of the motor becomes faster, and as the refueling progresses, a flow rate pulse B is output from the transmitter 15, counted by the counting circuit 31, and the counted value ( amount)
is displayed on the display 33 via the display drive circuit 32. The flow rate pulse B is also input to the calculation circuit 30, and the calculation circuit 30 calculates the refueling amount based on the current refueling unit price from the first storage circuit 23 and the flow rate pulse B, and calculates the refueling amount via the display drive circuit 36. The amount is displayed on the amount display 37. In this case, the arithmetic circuit 30
Since the unit value of the first memory circuit 23 is used, even if the contact part of the unit price setter's digital switch etc. has a contact failure due to vibration of the refueling device during refueling and the set unit price changes, there is no effect. do not have.

During refueling, the flow rate pulse B is also given to the determination circuit 26, and the determination circuit 26 determines the flow rate per unit time based on the clock pulse from the clock pulse generator 25. The rotation of the motor 3 is controlled so as to pump the water. This allows the power consumption of the motor 3 to be reduced and the service life of the pump 2 to be extended.

When the nozzle is returned to the nozzle case after refueling, the nozzle signal C falls (from H to L), and the motor 3 is thereby deenergized.

Note that when changing the unit price to a value other than the value set in the tolerance setting circuit 24 or beyond the set range, the refueling nozzle 10 is temporarily connected to the nozzle case 11.
The first memory circuit 23 and the second memory circuit 2 are removed by removing it from the case 11, and then returning it to the case 11 and removing it again.
Since the unit prices of 9 become the same, the unit price can be changed without outputting the signal A.

Since the refueling device of the present invention is as described in detail above, even if the refueling unit price setting value fluctuates due to poor contact, vibration, or any other cause, the fluctuation is immediately notified. Furthermore, even if such fluctuations occur during refueling, they do not affect the calculation of the refueling amount, so there is no disadvantage to the customer or the filling station. Since this is provided, the refueling unit price can be changed without any problem.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the configuration of a refueling device in which the present invention can be implemented, and FIG. 2 is a block diagram showing an example of the configuration of a control section. 2...Refueling pump, 3...Motor, 6...Flowmeter, 9...Refueling hose, 10...Refueling nozzle, 1
DESCRIPTION OF SYMBOLS 1... Nozzle case, 14... Nozzle detection switch, 15... Pulse transmitter, 16... Control unit, 1
7...Unit price setting device, 18...Tolerance setting device, 19
... Display section, 20 ... Power switch, 21 ... Output terminal, 22 ... Unit price setting circuit, 23 ... First memory circuit, 24 ... Tolerance setting circuit, 26 ... Judgment circuit, 27 ... Motor Control circuit, 28... Comparison circuit, 29... Second storage circuit, 30... Arithmetic circuit,
33... Oil supply amount display, 35... Unit price display, 2
7...Refueling amount display.

Claims (1)

[Scope of Claims] 1. A pulse generator that generates a number of flow rate pulses corresponding to the amount of refueling, a unit price setting circuit that sets a refueling unit price, and a unit that stores the refueling unit price for the current refueling set in the unit price setting circuit. a second memory circuit that stores the refueling unit price for the previous refueling that is stored in the first memory circuit; and a second memory circuit that stores the refueling unit price for the current refueling that is stored in the flow rate pulse and the first memory circuit. an arithmetic circuit that calculates the amount of refueling based on the amount of refueling; a display that displays at least the amount of refueling; a tolerance setting device that sets a tolerance for change in the unit price of refueling; and a current refueling time stored in the first storage circuit. a comparison circuit that compares the refueling unit price of and the refueling unit price of the previous refueling stored in the second storage circuit and outputs a signal when there is a difference other than the tolerance between the two unit prices. A refueling device.