JPH021757B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a refueling device in which data is mutually transmitted between a refueling machine and a POS terminal.

At gas stations, POS terminals are often used to process and record refueling-related slips, and for this purpose, refueling information or data such as the amount of refueling is transmitted between the refueling machine and the POS terminal. There is a need.

When attaching a POS terminal to an existing refueling machine,
Since the terminal equipment is usually located in the office of the gas station, it is necessary to dig up the concrete or the like on the site of the gas station in order to install the new transmission line, which requires a lot of work and cost.

In consideration of this point, the present invention utilizes the existing power supply line of the refueling machine to transmit the above data, and the refueling machine and the refueling machine are connected to a POS terminal installed separately. a switch MgA that is inserted into the power supply line between the pump motor of the refueling machine and its power source on the side of the POS terminal and opens and closes the power supply line; and a switch that is inserted into the power supply line on the fueling machine side and opens and closes the power supply line.
MgB, POS terminal side data transmission lines LA ₁ to _{LA 3} that connect the POS terminal to the power supply line near the switch MgB side of the switch MgA, and connect the refueling machine to the power supply line near the switch MgB side of the switch MgB.
Refueling machine side data transmission line connected near the MgA side
LB ₁ to _{LB 3} , and means RA2 inserted into the data transmission line on the POS terminal side and opening/closing this data transmission line.
, a means RB2 for opening and closing this data transmission line inserted into the refueling machine side data transmission line, and a means RB2 for opening/closing this data transmission line inserted into the refueling machine side data transmission line; means RA1C for opening the terminal side data transmission line opening/closing means RA2; means RB3C for opening the refueling machine side data transmission line opening/closing means RB2 in response to the closing of the POS terminal side switch MgA; and a nozzle. means (SW, RB1C,
RB4C) and means (SW, RB1C,
RB4C, RB3C) and the refueling machine side switch MgB
The switch on the POS terminal side detects that current no longer flows through the power supply line due to the opening operation of the switch.
The device is provided with means (CD, RA1C, RA3C) for opening the MgA and closing the data transmission line opening/closing means RA2 on the POS terminal side.

In the refueling machine standby state, the power supply line opening/closing switches MgA and MgB on the POS terminal and refueling machine sides are opened, and the data power transmission line opening/closing means RA2 and RB2 on the POS terminal and refueling machine sides are closed. The side and refueling machine side data transmission lines are connected to each other via the drive power supply line, and the refueling information of the previous refueling is being transmitted or has been transmitted via the power supply line.

When refueling next time, when the POS terminal is operated by inserting a customer card, for example, the POS terminal side data transmission line opening/closing means RA2 is opened and the POS terminal side switch MgA is closed. The refueling machine side data transmission line opening/closing means RB2 is opened. Next, when the nozzle is placed in the refueling position, the refueling machine side switch MgB is closed in response. Therefore, the power source on the pos terminal side is connected to the pump motor on the refueling machine side via the closed switches MgA and MgB by the power supply line, and refueling can be performed by operating the nozzle. When refueling is completed and the nozzle is returned to the standby position, the power supply line opening/closing switches MgA and MgB on the POS terminal side and the fueling machine side are opened, and the data transmission line opening/closing means RA2 and RA2 on the POS terminal side and the fueling machine side are opened.
When RB2 is closed, the data transmission lines on the post terminal side and on the refueling machine side are connected via the power supply line, making it possible to transmit refueling information.

The illustrated embodiment will be described below.
Figure 4 shows different operating states of the configuration in Figure 1, and Figure 2 shows the previous refueling completed and the refueling nozzle returned to the nozzle case (or raised to the standby position) (while sending refueling data. Figure 3 shows the state of waiting for the next refueling (or the transmission has finished), and Figure 3 shows the state of Figure 2 when the information written on the customer card inserted into the POS terminal for refueling (next time) is read. Figure 4 shows the state until the refueling nozzle is removed from the nozzle case (or lowered from the standby position). Indicates the status until the return.

In the figure, A is the office side and B is the oil supply device side. On the oil supply device side B, OD is an oil supply device that pumps oil (not shown) from an oil storage tank (not shown).
While measuring the amount of refueling with a pumping flowmeter (not shown), refueling is carried out through a refueling nozzle (not shown) at the end of the refueling hose. PG is a flow pulse transmitter that emits electric pulses (flow pulses) according to the measured oil amount, CN is a counter that counts flow pulses, and DP
is the display that displays the amount of refueling (and refueling amount if necessary), CL is the control unit, and SW is the nozzle detection switch, which connects and disconnects the refueling nozzle to the nozzle case (for ground-mounted refueling machines), Alternatively, it is opened and closed in response to the nozzle being raised and lowered between the standby position and the refueling position (in the case of a ceiling-hanging refueling machine).

RB1C is the transmission relay coil, and RB4C is the nozzle relay coil, both of which are installed inside the control unit CL. M is a driving motor for the pump.

On office side A, E1 is the power source for power (AC3
Refueling machine via power supply lines L1, L2, L3 at phase 200V)
Supply driving power to the OD pump motor M. E2 is the power supply line for control power (AC single phase 100V)
It is connected to the control unit CL of the refueling machine via L'1 and L'2.

POS is a POS terminal, and RA1C is a POS activation relay coil installed inside the POS terminal.

IFA is the POS terminal side interface,
PCA1 and PCA2 are photocouplers that constitute the interface IFA, and LA ₁ to LA ₃ are the interfaces.
Data transmission lines that connect IFA and power supply lines L1 to L3 on the office side, IFB is the fuel tank side interface, PCB1 and PCB2 are the interfaces
The photocouplers LB1 to LB3 that constitute the IFB are data transmission lines that connect the interface IFB and the power supply lines L1 to L3 on the tanker side B, respectively.
Therefore, the control unit CL of the POS terminal POS and the refueling machine OD is connected to the interface IFA and the data transmission line LA1~
LA3, power supply line L1 to L3, data transmission line LB1
~LB3, connected to each other via interface IFB.

MgA is a magnetic switch, and its interlocking contacts
MgAK is connected to the data transmission line at office side A.
Connection points PA1, PA2, PA3 where LA1, LA2, LA3 are connected to power supply lines L1, L2, L3 and power supply for power
Interposed between E1 and the magnetic switch MgA
The coil MgAC is connected in series with the contact RA1K1 which is operated by the actuating relay coil RA1C across the control power supply lines L'1 and L'2. RA2 is a relay, and its interlocking contact RA2K is connected to the data transmission lines LA1, LA2, and LA3 on the office side, and its coil
RA2C is a post-lock relay contact RA1K2 and a relay coil RA3C that spans control power supply lines L′1 and L′2.
The contact RA3K is connected in series with the contact RA3K. Relay coil RA3C is data transmission line
Connected across LA2 and LA3.

CD is a current detection relay, which is interposed in the power supply line L1 between the power supply E1 and the contact MgAK of the magnetic switch MgA, and opens and closes the contact KA. MgB is a magnetic switch, and its interlocking contacts MgBK are data transmission lines LB1, LB2, LB3 on the fueling machine side B.
Connection point where is connected to power feeder lines L1, L2, L3
The coil of the magnetic switch MgB is interposed between PB1, PB2, PB3 and the pump motor M.
MgBC is a contact operated by transmission relay coil RB1C across control feeder lines L′1 and L′2.
It is connected in series with RB1K1 and contact RB4K operated by nozzle relay coil RB4C.

RB2 is a relay, and its interlocking contact RB2K is connected to the data transmission lines LB1, LB2, and LB3 on the refueling machine side, and its coil RB2C is connected to the transmission relay coil RB1C across the control power supply lines L′1 and L′2. The contact RB1K2 is connected in series with the contact RB1K2 which is actuated by the relay coil RB3C. Relay coil RB3C is connected across data transmission lines LB2 and LB3.

In the above configuration, in the refueling standby state where the previous refueling has finished and the next refueling is waiting, the nozzle is returned to the nozzle case and the nozzle switch SW is open, so the transmission relay coil of the control unit CL
Due to the bias of RB1C, the contact is activated as shown in Figure 2.
RB1K2 is closed and contact RB1K1 is open. Also, since the relay coil RB3C is deenergized at that time and its contact RB3K is closed, the relay is connected to the power supply E2 via the control power supply lines L'1 and L'2.
Coil RB2C of RB2 is energized and its contact RB2K
is closed.

On office side A, both relay coil RB3C and relay coil RB1C are de-energized at that time, and their contacts RA3K and RA1K2 are both closed, so power is supplied via control power supply lines L'1 and L'2.
Coil RA2C of relay RA2 is energized by E2, and its contact RA2K is closed. Therefore, the POS terminal POS and the refueling machine control unit CL are connected to the interface IFA, data transmission lines LA1 to LA3, and connection point PA1.
~Power feed line L1~L3 between PA3 and PB1~PB3,
Data transmission lines LB1 to LB3, interface IFB
The device is connected via , and data transmission is possible, and the transmission of the previous refueling data is continuing or has been completed.

To refuel, first insert the customer card CA into the POS terminal POS and start the operation of the POS terminal. When the POS terminal reads the information written on the card CA, the POS activation relay coil RA1C is energized, which opens contact RA1K2 and deenergizes the coil RA2C of relay RA2, as shown in Figure 3.
Open RA2K to open the data transmission lines LA1 to LA3, and close contact RA1K1 to connect the relay coil of magnetic switch MgA with power supply E2.
Activate MgAC and close its contact MgAK.
As a result, relay coil RA3C is energized by power supply E1 via power supply lines L2 and L3, and contact RA3K is activated.
will be held.

When contact MgAK is closed, relay coil RB3C is energized on fueling machine side B via power supply lines L2 and L3, and contact RB3K is opened to close relay coil RB2.
RB2C is deenergized and its contact RB2K is opened to open the data transmission lines LB1 to LB3. At this time, the coil MgBC of the magnetic switch MgB is not energized yet, so its contact MgBK remains open and the pump motor M is not energized.

In this state, remove the nozzle from the nozzle case, or
Alternatively, when the nozzle is lowered from the standby position (that is, the nozzle is placed in the refueling position), the nozzle switch SW is closed, the nozzle relay coil RB4C is energized, the contact RB4K is closed, and the transmission relay Coil RB1C is deenergized and the contact
RB1K2 is opened, contact RB1K1 is closed, coil MgBC of magnetic switch MgB is energized by power supply E2, contact MgBK is closed, and the office side magnetic switch is first read by card reading (Fig. 3). Since the contact MgAK of the network switch MgA is closed, the power supply lines L1 to L3 are closed and the motor M is energized.

Therefore, it is possible to refuel, so if you operate the nozzle to refuel, the pulse transmitter will activate depending on the amount of refueling.
The PG generates flow rate pulses, which are counted by the counting circuit CN and the amount of oil supplied is sequentially displayed on the display DP.

Note that when current flows through the power supply line L1, the detector CD detects this and closes the contact KA.

When refueling is completed and the nozzle is returned to the nozzle case or raised to the standby position (i.e., the nozzle is returned to the standby position), the nozzle switch SW
will be held. This allows the transmission relay coil to
RB1C is energized and the contact is closed as shown in Figure 2.
Opens RB1K1 and closes contact RB1K2, and also deenergizes nozzle relay coil RB4C and closes contact RB4K.
open.

This allows the coil of the magnetic switch MgB to
Since MgBC is deenergized and contact MgBK is opened, motor M stops. At this time, the current detector CD detects that the current no longer flows through the power supply line L1 and that the current no longer flows through the current detector L1, and opens its contact KA. When contact KA opens, post-actuated relay coil RA1C is deenergized, contact RA1K1 opens, and contact RA1K2 closes.

Magnetic switch is activated by opening contact RA1K1.
Since MgA's coil MgAC is deenergized and contact MgAK is opened, relay coils RA3C and RB3C are deenergized and contacts RA3K and RB3K are closed, respectively. This will cause the coils of relays RA2 and RB2 to
RA2C and RB2C are energized and contacts RA2K and RB2K are closed.

Therefore, the control section of the POS terminal POS and the refueling machine OD
CL is interface IFA, data transmission line LA1
~LA3, connection points PA1~PA3 and PB1~PB3 are connected via power feed lines L1~L3, data transmission lines LB1~LB3, and interface IFB, and power feed lines L1~L3 are connected to the magnetic switch MgA. It is cut off from the power supply E1 by opening.

Therefore, necessary data such as the amount of refueling is sent from the refueling machine OD to the POS terminal POS. The terminal POS performs the necessary data processing, prints out and records the slip, and waits in the state shown in Figure 2 until the card is inserted for the next refueling.

As mentioned above, the present invention can be implemented not only in a ground-mounted refueling device but also in a ceiling-suspended type. In this case, the function of the nozzle switch SW is performed by a hose (nozzle) raising/lowering switch or a display zero return switch.

The data to be transmitted is not limited to the amount of refueling, and the direction of transmission is not limited to transmission from the post terminal to the refueling machine, of course, transmission in the opposite direction is also possible. for example,
The refueling unit price and unit price rank written on the card read by the POS terminal can be sent to the refueling machine and displayed to notify the customer, or the refueling amount and amount can be preset on the POS terminal and the preset values can be sent to the refueling machine. It can also be sent to display and control refueling.

As described above, according to the present invention, an existing power line can be used as a data transmission line, so there is no need to excavate the earth floor of the gas station site or conduct line entry work, reducing equipment costs. Since the power line is cut off from the power supply, it is possible to prevent errors caused by noise during data transmission.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the structure of an embodiment of the present invention, and FIGS. 2, 3, and 4 are diagrams showing different operating states of the structure of FIG. 1. A...Office side, B...Refueling machine side, OD...Refueling machine,
CL...Control unit, PG...Flow rate pulse transmitter, CN...Counting circuit, DP...Display, SW...Nozzle detection switch, M...Pump motor, POS...POS terminal.

Claims (1)

[Scope of Claims] 1. A refueling machine and a post terminal installed separately from the refueling machine, which transmits and receives data between the two, comprising: a pump motor of the refueling machine and its power; a switch MgA that is inserted into the power supply line between the power source and the POS terminal side and opens and closes the power supply line; a switch MgB that is inserted into the power supply line at the fuel supply machine side and opens and closes the power supply line; Connect the POS terminal to the power supply line and the switch.
A data transmission line on the pos terminal side that connects near the switch MgB side of MgA, and a data transmission line on the switch MgB side that connects the refueling machine to the power supply line.
a data transmission line on the refueling machine side connected near the switch MgA side; a means RA2 inserted into the data transmission line on the POS terminal side for opening and closing this data transmission line; and a means RA2 inserted in the data transmission line on the refueling machine side. means RB2 for opening and closing the data transmission line; and means for detecting the start of operation of the POS terminal and closing the switch MgA on the POS terminal side and opening the data transmission line opening/closing means RA2 on the POS terminal side. RA1C; means RB3C for opening the refueling machine side data transmission line opening/closing means RB2 in response to the closing of the switch MgA on the POS terminal side; A means (SW, RB1C, RB4C) for closing the refueling machine side switch MgB, a means for opening the refueling machine side switch MgB upon detecting that the nozzle has been returned to the refueling standby position, and a means for opening the refueling machine side switch MgB, and the data on the refueling machine side. Transmission line opening/closing means
Means for closing RB2 (SW, RB1C, RB4C,
RB3C), detects that current no longer flows to the power supply line due to the opening operation of the refueling machine side switch MgB, opens the POS terminal side switch MgA, and opens the POS terminal side switch MgA, and also opens the POS terminal side data transmission line. Means for closing opening/closing means RA2 (CD, RA1C, RA3C)
A refueling device characterized by being provided with.