JP3374903B2 - Refueling device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for controlling the amount of liquid in an oil storage tank of an oil supply apparatus for metering and selling fuel oil supplied from the oil storage tank.

[0002]

2. Description of the Related Art An oil storage tank buried underground has a substantially circular cross section in terms of strength and the like. Therefore, the liquid level and the liquid amount are measured based on the liquid level data detected by a liquid level gauge. The amount of liquid is calculated from a function that defines the relationship with.

However, since the function that defines the relationship between the liquid surface and the liquid amount contains an error due to manufacturing tolerances and installation posture, a relatively accurate weighing machine can be provided as disclosed in, for example, Japanese Patent Laid-Open No. 1-163621. A calibration characteristic is obtained from the amount of liquid discharged through the device and the data of the liquid level gauge, and the function that defines the relationship between the liquid level and the liquid amount is corrected. That is,
Comparing the actual liquid amount measured by the weighing machine with the liquid amount change estimated from the liquid level data of the liquid level gauge, calculate the calibration data that defines the relationship between them and make a meaningful change to the calibration data. These works are being continued until all of them disappear.

[0004]

However, since these calibration operations are automatically executed by sensing the variation in the amount of liquid in the oil storage tank, it is difficult to manage, and unintended calibration may be executed. There is. The present invention has been made in view of such a problem, and an object of the present invention is to reliably grasp the progress of the calibration work and manage the liquid amount in the oil storage tank with high reliability. An object is to provide an oil supply device.

[0005]

In order to solve such a problem, according to the present invention, oil is supplied by an oil supply nozzle through a measuring mechanism connected to an oil storage tank, and the liquid level and the liquid volume of the tank. A liquid amount for calculating the liquid amount in the oil storage tank by the liquid level detected by the liquid level detection means inserted in the oil storage tank based on the reference data defining the relationship with and outputting the liquid amount to the display means. In a refueling device provided with a calculation means, correction candidate data consisting of a refueling amount by the measuring mechanism and a liquid level at the time of sampling the refueling amount, and the number of the correction candidate data are stored in a storage means, and externally stored. The correction means outputs the number of the correction candidate data to the display means in response to a command from the correction means, and updates the reference data based on the correction candidate data only when the number of the correction candidate data exceeds a predetermined number. It was so equipped.

[0006]

Since the reference data is updated and corrected for the first time after the number of correction candidate data is confirmed by the display means, unintended update can be eliminated and the reference data can be configured with high reliability.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The details of the present invention will be described below with reference to illustrated embodiments. FIG. 1 shows an embodiment of the present invention, in which an oil storage tank 1 buried underground has a liquid level detector 2 for detecting the liquid level. A magnetostrictive linear liquid level detector as shown in Japanese Patent No. 304164 is provided, and fuel oil is supplied to a weighing machine 4 connected by a pipe line 3. Each liquid level detector 2 is connected to the switching means 6 by a cable 5 and outputs a liquid level signal to a liquid amount measuring means 7 described later.

As is well known, the weighing machine 4 is detected by a flow meter connected to a pipe line, an oil supply nozzle 8 connected to the flow meter, a nozzle switch 9 for detecting whether the oil supply nozzle is undocked, and a flow meter. It is composed of a display device 10 for displaying the amount of refueling. In this embodiment, the amount of refueling is transmitted to the POS 12 connected by a cable 11.

The liquid amount measuring means 7 has a function of converting a signal from the liquid level detector 2 into liquid level data, and reference data for defining the liquid level-liquid amount based on the amount of oil supplied from the weighing machine 4. Compensation means 14 for compensating for the tank and display control panel means 15 are provided, and the liquid level of the tank is calculated from the liquid level of the tank 1 selected by the switching means 6 and the reference data and displayed on the display 16. Further, it is configured to correct the reference data according to a command from the display control panel 15.

FIG. 2 is a block diagram showing an embodiment of the above-mentioned liquid amount measuring means. The liquid level detector 2 excites the transmitting coil 21 by the pulse from the drive pulse generating circuit 20,
An elastic wave is generated in the magnetostrictive wire 22, and a first pulse signal is generated when the elastic wave is passed through the receiving coil 23, and an elastic wave reflected by the magnetic body 25 embedded in the float 24 located on the liquid surface is received by the receiving coil. 23, and outputs the second pulse signal.

When the receiving circuit 26 receives the first pulse signal and the second pulse signal, the counter 27 is activated by the first pulse to start counting the clocks from the clock generating circuit 28, and then the second pulse. The count operation is stopped by receiving. This operation is continued until the count counter 29 counts up, and the count value of the counter 27 during that time is integrated by the integration counter 30 and output to the calculation determination means 31.

The calculation determining means 31 receives the amount of refueling by each refueling from the weighing machine 4 or the POS 12 and accumulates and stores it in the storage means 32, so that a change in the liquid level can be reliably detected.
For example, when the amount of fuel exceeds 100 liters, the integrated value and the liquid level at this time are stored in the QH storage means 35 at the end of the refueling, and the integrated value in the storage means 32 is cleared.

The correction means 14 is a reference table storage means 3.
4, Q-H storage means 35, table conversion means 36, and working memory 37. As shown in Table 1, the reference table storage means 34 stores the liquid levels Hm, Hm-1, ... Of points m, m-1 ,.
H2 and H1, and the liquid volume on these surfaces Qm, Qm-1, ... Q2,
Reference data that defines the relationship with Q1 is stored.

[0014]

[Table 1]

The Q-H storage means 35 is a calculation determination means 31.
Integrated values Δq, Δq1, Δ of the storage means 32 output from
.. .DELTA.qn-1, .DELTA.qn and the respective liquid levels h, h1, h2, ... hn-1, hn at the time when the respective integrated values are output are stored.

The table converting means 36 uses the working memory 37 at the time when the liquid level in the tank 1 rises due to the refueling of the fuel oil by the tanker, and the liquid at the point defined by the data in the reference table storing means 34 is used. Hm, Hm-1, ...
The liquid amount for H2 and H1 is calculated, and the result is stored in the working memory 37 until the update is instructed. And
The data in the reference table is updated with the correction candidate data stored in the work memory 37 at the stage instructed by the update switch 38. Further, the contents of the work memory 37 are displayed on the display unit 1 when the display is commanded by the display switch 39.
It is configured to output to 6.

Reference numeral 40 in the figure denotes scanning control means for instructing the switching means 6 to take in data from the liquid level detector of each tank 1.

Next, the operation of the apparatus thus constructed will be described with reference to the flow charts shown in FIGS.
When the refueling nozzle 8 is removed from the nozzle hook and the lever is pulled to start refueling, the refueling amount is measured by the flow meter and the refueling amount is displayed on the display 8 of the weighing machine 4.

When the refueling of the predetermined amount is completed and the refueling nozzle 8 is returned to the nozzle hook and the nozzle switch 9 is turned off (S
T1), when the total refueling amount q from the time when the previous correction candidate data was collected is calculated and exceeds a predetermined amount, for example, 100 liters (ST2), the calculation determining means 31 causes the current liquid level h and refueling. The quantity q and the correction candidate data are stored in the QH storage means 35 (ST3), and at the same time, the number of correction candidate data is incremented.

When such an operation is repeated, as shown in Table 2, the liquid levels h, h1, h2, ... hn-1, hn, and the amount of lubrication Δq, Δq1, Δq2 ,. The relationship between Δqn−1 and Δqn is stored in the QH storage means 35. When the fuel oil in the oil storage tank 1 is consumed and the amount of liquid decreases,
Receive supply from Lori.

[0021]

[Table 2]

When the liquid level rises due to replenishment (ST4),
Table conversion means 3 which received a signal from the calculation determination means 31
6 creates the data of the provisional table based on the correction candidate data stored in the QH storage means 35 (ST
5) Then, this is stored in the work memory 37 (ST6).

That is, the relative liquid amount Δq + Δq1 + at each liquid level h, h1, h2, ...
・ ・ ・ ＋ Δqn-1 + Δqn, Δq1 + ・ ・ ・ ＋ Δqn-1 + Δq
n, Δqn-1 + Δqn, Δq are calculated, and the liquid levels Hm, Hm-1, ... H of the reference data points m, m-1 ,.
2, the relative liquid volumes qm, qm-1, ..., Q2, q1 corresponding to H1 are calculated by the complementary calculation.

The relative liquid amount qm-1 of the liquid level Hm-1 will be described as an example. From the correction candidate data, the liquid levels hm-1 and hm-1 immediately above and below the liquid level Hm-1 in the immediate vicinity. 'And this liquid level (hm-1
-Hm-1 ') and the relative liquid level hm-1' relative to the liquid level (Δqm-1 + ... + Δqn-1 + Δqn) = q'and q '+ {qm / (hm-1-hm -1 ')} {(hm-1 -Hm-
1) / (hm-1-hm-1 ')} is calculated.

Then, the absolute liquid quantity qn at the time when the liquid level rises is added to obtain the liquid levels Hm, Hm-1, ... As shown in Table 3.
... Liquid volume corresponding to H2 and H1 qm + qn = Qm ', qm-1 + q
Temporary data of n = Qm-1 ', ... Q2 + qn = Q2', q1 + qn = Q1 'are obtained.

[0026]

[Table 3]

In this way, when the predetermined number of correction candidate data are stored, the display switch 39 of the liquid amount measuring means 7
When is pressed (ST1 in FIG. 4), information about the correction candidate data collected for each oil storage tank, as shown in FIG.
In other words, the highest and lowest liquid levels from which correction candidate data was collected,
The number of correction candidate data between the reference liquid levels, in this embodiment, the ratio to the total number of correction candidate data is displayed (FIG. 4S).
T2-4).

On the other hand, when the renewal switch 38 is pressed (ST5 in FIG. 4), it is confirmed whether or not the number of data samples between the liquid levels at the points reaches a prescribed rate, for example, 50% or more (ST6 in FIG. 4). If it exceeds, (Fig. 4 ST
7), the table conversion means 36 updates the data of the reference table shown in Table 1 stored in the reference table storage means 34 with the data of the provisional table shown in Table 3 stored in the working memory 37 (see FIG. 4). (ST8), the data in the provisional table is printed out (ST9 in FIG. 4).

On the other hand, when the number of collected data has not reached the reference value, the correction candidate data is further collected without updating the reference table. As a result, it is possible to prevent the reference data from being updated by data having a small number of data and low reliability, and to measure the liquid amount with high reliability.

Although the magnetostrictive liquid level gauge is used as the liquid level detecting means in the above-described embodiment, another type of liquid level detecting means such as a capacitance type level gauge capable of detecting the liquid level with a predetermined accuracy is used. It is clear that the same effect can be obtained by using the liquid level gauge.

[0031]

As described above, according to the present invention, correction candidate data consisting of the amount of refueling by the measuring mechanism and the liquid level at the time of sampling the refueling amount, and the number of correction candidate data are stored in the storage means. stored, and outputs to the display means the number of correction candidate data in accordance with a command from the outside, based on the observed compensation candidate data when the correction candidate number data exceeds the predetermined number
Since a correction means for updating the criteria data, excluded from the check by the display means the number of correction data, for the first time reference data is corrected by inputting a command signal from the outside, unintended correction operation The reference data can be corrected with high reliability.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of an oil supply device of the present invention.

FIG. 2 is a block diagram showing an embodiment of a liquid amount measuring means in the same apparatus.

FIG. 3 is a flowchart showing a provisional data collection step of the same apparatus.

FIG. 4 is a flowchart showing a reference data updating process of the above apparatus.

FIG. 5 is a diagram showing an example of display data of the same device.

[Explanation of symbols]

1 oil storage tank 2 Liquid level detector 4 weighing machine 7 Liquid volume measuring means 12 POS 14 Correction means

Continuation of the front page (56) Reference JP 62-211515 (JP, A) JP 1-163621 (JP, A) JP 9-304164 (JP, A) Actual development Sho 64-51100 (JP , U) Actual Development Sho 60-35224 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B67D 5/60

Claims (2)

(57) [Claims] 1. A refueling nozzle is used for refueling through a metering mechanism connected to the refueling tank, and the refueling nozzle is inserted into the reserving tank based on reference data that defines the relationship between the liquid level and the liquid volume of the tank. In an oil supply device including a liquid amount calculation unit that calculates the liquid amount of the oil storage tank by the liquid level detected by the liquid level detection unit and outputs the liquid amount to the display unit, the amount of oil supplied by the measuring mechanism, The correction candidate data consisting of the liquid level at the time of collecting the amount of refueling, and the number of the correction candidate data are stored in the storage means, and the number of the correction candidate data is output to the display means by an external command, A refueling device comprising a correction means for updating the reference data based on the correction candidate data only when the number of correction candidate data exceeds a predetermined number. 2. The oil supply device according to claim 1, wherein the liquid level detecting means is constituted by a magnetostrictive wire type liquid level detector.