JPS6075961A - Transmitter of oil supply information - Google Patents

Abstract

PURPOSE:To transmit assuredly the oil supply information without using a special wiring by transmitting the oil supply information via a distribution line and at the same time using a round-in preventing means to prevent the round-in of signals in a signal transmission mode. CONSTITUTION:The oil supply information is transmitted via a wiring between an oil supply device consisting of an oil supplier 2-1 and an oil supply information transmitter 3-1 and an oil supply data processor POS20. A modulator 27 modulates the series data delivered from a transmission/reception circuit 37 via an AND circuit 45 and supplies the obtained modulation signal to a coupling circuit 29. The circuit 29 transmits the modulation signal to a distribution line 30. While the circuit 37 transfers the data given from the POS20 to a transmission/ reception circuit 36. A round-in preventing means 40 consisting of a transmission signal detecting circuit 42, a reception signal detecting circuit 43 and AND circuits 44, 45 is provided to prevent the round-in of signals between the modulator 27 and a demodulator 28.

Description

Detailed Description of the Invention (Field of Application) The present invention relates to a refueling information transmission device, and in particular, a refueling data processing device (hereinafter referred to as (abbreviated as POS)
The present invention relates to a refueling information transmission device that transmits information via a power distribution line.

(Prior Art) FIG. 1 is a block diagram showing a schematic configuration of a conventional refueling information transmission device for a refueling station.

At a gas station, there are usually a plurality of refueling devices 1-'1.
1-2... are installed. And each refueling Hf&1 1. 1 2... is as shown in the figure,
A switch 10 that sends a refueling request and a refueling end signal, and a switch 10 that measures the amount of gasoline that has been refueled.
A refueling machine 2- has a transmitter 11 that transmits and outputs a number of pulses according to the measured refueling part, a pulse counter 12 that divides the output pulses of the transmitter 11, and a display 14. 1 and the refueling information from the refueling machine to birdie line 19
and a refueling information transmission device 3-1 that sends the information to one 0320 via the refueling information transmission device 3-1.

In the refueling information transmission device 3-1, the micro-amp coater 21 is a general-purpose one, mainly (1) LJ.
23, memo') 22 (ROMJ3 and RAM), human output interface 24, J3, and a common bus 25J with an information transmission path C' between these.

The human output interface 24 is connected to the oil supply controller 2 .

Series) Norcon 1 to ○-ra 26 convert parallel data 11 output from the human output interface 24 of the micro combi coater 21 into serial data, and conversely, convert the data from the outside supplied from the transmitting/receiving circuit 36. The transmitting/receiving circuit 36 transmits the serial data outputted from the roller 26 to the serial controller 1 to the party line 19, and also transmits the received serial data to the serial controller 26.

The signal transmitted on party line 19 is
20, where it is used for various calculations and administrative processing.

In addition, the switch 10 issues a refueling request signal when the nozzle (t) refueling nozzle is removed in a fixed type refueling device d, and when the nozzle is lowered to the refueling position in a suspended type refueling device. .

This drives the pump. Then, after the nozzle is inserted into the car's fuel filler port, when the nozzle valve is pressed, refueling will begin. When refueling is finished and the nozzle is hung on the nozzle hook or raised from the refueling position, the switch 10 issues a refueling end signal.

Since the mechanism for this is well known, illustration thereof is omitted.

Supply 1 large amount of gasoline to the transmitter 1 of the flow meter.
1" and is converted into a corresponding number of pulse signals.

This pulse signal is divided by the pulse counter 121 and supplied to the display 14, where the fuel supply ff1i lfi is displayed.

Then, the refueling information is sent onto the signal line 19 from the refueling information transmission device 3-11 and supplied to the PO 320. P
The OS 20 receives the refueling information signal, calculates the amount of refueling, the charge, etc., processes other sales data, and supervises various matters.

In this J, eel refueling information transmission device, each refueling machine has a signal 8 ax 5119 for data transmission.
The disadvantage is that special wiring work is required for this purpose.

(Purpose) The present invention was made in order to eliminate the above-mentioned drawbacks, and the purpose is to provide reliable information on refueling between the refueling device and the 008 by applying power distribution line carrier communication technology. An object of the present invention is to provide a refueling information transmission device capable of transmitting information.

(Approximately concave) In order to achieve the above object, the present invention is configured to convey the refueling information via a power distribution line, and the signal transmission 1
1! The feature is that a loop prevention means is provided to prevent signals from looping around, thereby ensuring reliable signal transmission.

(Example) The present invention will be described in detail below with reference to the drawings.

FIG. 2 is a block diagram of one embodiment of the present invention, and FIG. 3 is a flowchart t--1 to explain its operation.

In addition, in FIG. 2, regarding the oil supply device 1-1 for one system -
Only C is shown. In this figure, the same reference numerals as in Figure 11 indicate the same or equivalent parts.

In the present invention, the oil supply system ff#1-1 and PO320 (7)
In order to transmit refueling information between the two via the power distribution line 30,
The refueling information transmission Hii:j3-1 is provided with means for coupling the refueling information to the distribution line 30, and means for preventing wraparound that occurs when the refueling information is coupled.

The transmitter/receiver circuit 37 of the information transmitter 103-1 receives the data output from the transmitter/receiver circuit 36, or later transmits the data received from the PO320 side to the transmitter/receiver circuit. Transfer to 36.

The modulator 27 modulates the serial data output from the transmitter/receiver circuit 37 via the AND circuit 45 and supplies the resulting modulated signal to the coupling circuit 29 . A coupling circuit 29 couples the modulated signal to a power distribution m 30 and sends it out.

Power distribution I! The modulated signal transmitted at 300 is received by the PO 320 via the coupling circuit 31, demodulated there, and used for the divine calculations and office processing described in connection with the conventional example.

On the other hand, the demodulator 28 receives the modulated signal transmitted on the power distribution line 30 via the coupling circuit 29 and demodulates it. The demodulated signal is transferred to the transmitter/receiver circuit 36 via the AND circuit 44 and the bus receiver circuit 37.

The demodulated signal is further transmitted to the serial controller 1 to the roller 26.
Then, the data is converted into parallel data at 113 and taken into the microcomputer 21 via the input/output interface 24. CPtJ23, according to the scheduled procedure,
This is processed arithmetic.

The signal transmitted from the transmitting/receiving circuit 36 and received by the transmitting/receiving circuit 37 is modulated by the modulator 27, and then sent to the coupling circuit 29.
It is sent out to the power distribution line 30 via.

In that case, the sent out lc-multiplied signal is supplied to the demodulator 28 via the coupling circuit 2-9, where it is demodulated (transmitted again to the transmitter/receiver circuit 37 - the so-called [1!1 interference phenomenon occurs). , send an accurate signal <'E.

In addition, the signal sent by the reverse power distribution line 30 J:
It is demodulated by the demodulator 28 and sent to the transmitter/receiver circuit 37J and then to the transmitter/receiver circuit 36;
7, the signal goes around to the modulator 27.

In order to prevent this wrap-around phenomenon, the present invention has J, (N1 added to the transmit signal detection circuit/I2, receiver (i)
The loop prevention means 7IO is composed of an i signal detection circuit 43a5 and AND circuits 47I and 45.

Accepts the received signal from PO320 [Before turning on,
When the transmission signal from the transmission/reception circuit 36 is transmitted to the transmission/reception circuit 37 and the signal is sent to the modulator 27, the transmission signal detection circuit 42 detects this and produces an output.

The output is inverted and supplied to the AND circuit 44, which is closed. At the same time, the operation of the received signal detection circuit 43 is prohibited. As a result, the AND circuit /15 is kept open and the AND circuit 44 is kept closed.

Therefore, the signal input to the demodulator 28 by the coupling circuit 29J and the loop-around phenomenon is prohibited from being transmitted to the transmitting/receiving circuit 37.

Also, contrary to the above, the signal from the PO 320 is transmitted to the demodulator 28 via the distribution line 30 and the coupling circuit 29,
The signal demodulated by the demodulator 28 is sent to the transmitting/receiving circuit 37, and the received signal detecting circuit 43 detects this and produces an output.

The output is inverted and supplied to an AND circuit/15,
Close this. At the same time, the transmission signal detection circuit i42
Prohibits the operation of As a result, the AND circuit 44 is kept open and the AND circuit 45 is kept closed.

Therefore, the transmission/reception circuit 37J:
Therefore, the signal is prohibited from being transmitted to the modulator 27 and the coupling circuit 29.

As before, add the signal 1 to the transmitted or received signal.
The AND circuits 7'14 and 45, whose operation is prohibited, are released by the completion of transmission or reception of the signal and return to the normal operating state.

Next, referring to 71 ko 1-chi 1 sea I~ in Fig. 3,
The operation of this embodiment will be explained.

Step S1: Determine whether or not there is a refueling request B from the refueling machine. If there is a refueling request signal, the process advances to step S2.

Step S2... Does the CPU 23 send a refueling request signal?
Overturn the U issue.

Step S3...l) It is determined whether the time limit U signal (FNQ> from the OS 20 has been received).

The alignment signal ENQ is transmitted from the PO 320 and includes a coupling circuit 31, a distribution line 30, two coupling circuits, a demodulator 28,
It is incorporated into the microcomputer 21 via the transmission/reception port 11!836.37J> and the serial controller 26.

When the interval l signal is received from the PO 320, as described above, the reception signal detection circuit 43 of the detour prevention means 40
detects this and prevents the signal from looping around.
The AND circuit 45 is closed and the transmitting/receiving circuit 37 is connected to the modulator 27.
Prohibits signals from being transmitted to

At 11·r, the operation and output of the transmission signal detection circuit 42 is prohibited.

This timing signal ENQ is sequentially transmitted from the PO 320 to the respective refueling stations 11L-1, 1-2, . . . .

Until the timing U signal J-36NQ is received, the microcomputer 21 is in a standby state, waiting to receive this timing signal.

Step S4... When the reception of the timing signal ENQ is confirmed, the CPU 23 sends the refueling 2Y request signal encoded in step S2 to the -C
Serial] is sent to rollers 1 to 26.

The refueling request signal is sent to the modulator 2 via the serial control []-RA PO6 transmitting/receiving circuits 36, 37 and the AND circuit 45.
Sent to 7. The modulator 27 modulates this refueling request signal and sends it to the distribution line 3 via the coupling circuit 29.
0-to and communicated to PO 320.

At this time, the transmitted signal detection circuit 12 outputs an output, which closes the AND circuit 4/Il), and the reception signal
Since the operation and output of the '4 detection circuit 43 are inhibited, the looping of signals is prevented.

The modulated refueling request signal is taken in from the power distribution a30 to the PO320 via the coupling circuit 31. PO320
When the refueling request signal is correctly received, the refueling machine returns a reception confirmation signal (ACK signal @) and a refueling permission signal to the refueling machine.

Step S5...On the fueling machine side, it is determined whether or not a signal has been received at this 80 point. If the reception confirmation signal ○K is not received, the process returns to step S6.

Step S6: Determine whether or not the next timing signal has arrived from the PO 320, and if so, send out the refueling request signal again - that is, repeat step s4.

In step S5, reception 4'("
Acknowledgment S-3ACK and refueling permission signal received 27
If so, proceed to step s7.

Note that until these signals are received, the refueling machine is in a standby state.

Step S7...In the previous step s5, PO3
If the reception of the refueling permission signal from the refueling machine 20 is confirmed, the refueling permission signal is sent to the refueling machine 2-1. As a result, the pump lock is released and the operation of the oil supply pump is started.

As described above, refueling is actually performed and +'+i+
The pulse counter 12 of 1ffl counts the refueling pulses generated according to the amount of refueling, and the amount of refueling is displayed on the display 14.

Step S8: If the refueling is completed or not, it is determined whether or not there is a refueling end signal.

If the refueling end signal is detected, the process advances to the next step S9.

Step S9: Output the Bonn plotter signal.

As a result, the operation of the oil supply pump is stopped and its operation cannot be started. Along with this, pulse counter 1
2 through the input/output interface 24.
) The count value of the pulse counter 12 is taken into U and encoded.

Step S10...Similar to the previous step S3, P
It is determined whether or not the makeshift signal ENQ has been received from the OS 20, and it waits in this state until it is received. If the interval I signal is received, the next step S
Proceed to step 11.

Step S11: Output the encoded pulse counter division value to the serial controller 26.

The coded number of palmeka 1 kunta is received and amplified by the transmitter/receiver circuit 36.37, and then sent to the modulator 27a5.
and is sent to the distribution wheel 3042 via the coupling circuit 29.

When it is received by the multiplex signal POS 20, a reception confirmation signal ACK is sent back to the refueling machine.

Step S12: Determine whether the received If multiplication signal (ACK signal) is returned from the PO 320. If the reception confirmation signal ACK is not transmitted, the process proceeds to step 513.

Step S13: It is determined whether the next inquiry signal from the PO 320 has arrived, and the process of step S11 is repeated for the arriving platform.

In addition, in step S12, if the reception confirmation signal ACK is received from the PO 320, the P
The process 4) of transmitting refueling information to O320 is completed.

At each step, microcoater 21
Kara POS 20 or from Po520 to microphone]: 1 When the signal is transmitted to the microphone coater 21 (
jl, As mentioned above, it is a matter of course that the wrap-around prevention means/IO prevents the wrap-around of No. 13.

L(+-r LL, oil supply device ffi 1-1 empty P
(7) Data transmission (only 11 times, P
Only the platform that could not receive normal data on the O320 side retransmits the same data, but instead, it is possible to transmit data two or more times and have it retransmitted when they do not match, or It is also possible to employ data determined to be correct according to majority logic.

Also, when necessary, the refueling machine sends a transmission request to Po8 ( ) and sends the necessary data after receiving and confirming the permission signal from Po8. Of course it is.

(Effects) As is clear from the above paragraph 31, according to the present invention, the following effects are achieved.

(1) A power distribution line is used to transmit refueling information between the fuel supply system neck and Po8, and since the power distribution line of the pump drive motor can be used as the power distribution line, a separate signal line is provided. There's no need.

(2) Refueling using the power line can be achieved by simply adding a transmitting/receiving circuit, bypass prevention means, demodulator, modulator, coupling circuit, etc. to the conventional party-line type refueling information transmission equipment. Information transmission methods can be applied.

(3) If the signal is not bypassed by the bypass prevention means,
[Kuruma Shun] There will be no more confusion, and information will be transmitted correctly.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a block diagram showing a survey route (1°-1 configuration) of a refueling information transmission device at a conventional refueling station, and Fig. 2 is a block diagram of an embodiment of the present invention. , FIG. 3 is a flowchart for explaining the operation. ]0... SW f, 11... Transmitter, 12...
Pulse counter, 20...POS, 21...Microcomputer, 22...Meshiri, 23...cpu
, 24... Input/output interface, 25... Bath, 29.31... Coupling circuit, 30... Distribution line,
36゜37... Transmission/reception circuit, /10... Detour prevention means, /+2... Transmission signal detection circuit, 43... Reception signal detection circuit Patent attorney Michito Hiraki and 1 other person

Claims (2)

[Claims] (1) A refueling information transmission device for transmitting refueling information inputted to the refueling device to a PO8 connected via a power distribution line, which includes a means for encoding the refueling information, and a means for encoding the refueling information. Means to change the refueling information J1°1, change,,l! ,l
a coupling circuit for transmitting the transmitted signal to a distribution line and receiving the signal transmitted via the distribution line; and means for converting the signal fetched from the coupling circuit into a signal. The present invention includes loop prevention means for inhibiting the output of the demodulation means while the signal to be transmitted is being supplied to the modulation means, and on the other hand, inhibiting the supply of the signal to the modulation means while the demodulation means is producing an output. A refueling information transmission device that is characterized by: (2) A patent system characterized in that the exit of the coded signal from the refueling device onto the distribution line is performed in response to reception of an ENQ signal from the PO3.