JP3433399B2 - Refueling device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention
Gasoline and light oil, especially to vehicle tanks
The oil type to be refueled and vehicle type
Oil vapor sensor that detects whether the oil type in the tank matches
The present invention relates to a refueling device provided with a fuel supply. [0002] Generally, gasoline is used in gasoline stations and the like.
For each type of oil to be refueled, such as for refueling or light oil refueling
Is equipped with a refueling device. [0003] Therefore, in this type of refueling device, the customer's self
Refueling the vehicle's fuel tank (hereinafter referred to as the vehicle tank)
When lightening gasoline, for example,
It is said that light oil will be supplied using the oil supply device for oil supply
Oil vapor sensor, etc. to prevent
Oil type judgment function to perform oil type judgment
It is becoming. Here, a conventional oil vapor sensor is used.
In general, semiconductor gas sensors are used to
For determining the oil type based on the organic gas concentration of the oil vapor
There is. [0005] Furthermore, another prior art oil vapor sensor.
Is described in Japanese Patent Application Laid-Open No. 4-128192.
Focus on the difference in sound speed depending on the concentration of oil vapor
Then, using a single ultrasonic transmitting / receiving element, the ultrasonic pulse
The time from transmission to reception of the echo,
That is, based on the length of the propagation time of the ultrasonic pulse,
Is long, gasoline with high concentration of oil vapor, or during propagation
If the time is short, it is a light oil with low concentration of oil vapor
Some oil types are determined. [0006] Incidentally, the above-described subordinate
In the future technology, a semiconductor gas sensor will be used for the oil vapor sensor.
However, this gas sensor is susceptible to deterioration and
Response is bad because it must be used in a state
There's a problem. Explosion proof when using gas sensor
Therefore, complicated mechanisms are required, and
There is also the problem of inviting. On the other hand, another conventional oil vapor sensor
Uses a single ultrasonic transmission / reception element to transmit ultrasonic pulses.
The above gas sensor to determine the oil type based on the transport time
Can solve the problem. However, generally, ultrasonic waves are transmitted in a pulse form.
Signal level will be extremely low,
Noise changes due to small changes in propagation time
May cause erroneous detection, resulting in poor detection accuracy
There is a problem. Further, another prior art oil vapor sensor.
Is based on the propagation time of the ultrasonic wave by the ultrasonic reflection echo.
Position of the ultrasonic transmitting and receiving element
High dimensional accuracy is required. Therefore, accurate ultrasonic
In order to obtain a reflected echo, the uniformity and random
It is necessary to take measures to reduce false echo due to
However, there is a problem that the cost is high. The present invention has been made in view of the above-mentioned problems of the prior art.
The present invention has simplified the structure of the oil vapor sensor.
While at the same time greatly improving the accuracy of oil type determination.
It is an object of the present invention to provide a refueling device that can perform the following. Means for Solving the Problems The above-mentioned problems are solved.
The feature of the configuration adopted by the present invention is that the oil vapor sensor
Is an ultrasonic transmission element that transmits ultrasonic waves in the suction line
Are separated from and opposed to the ultrasonic transmission element.
And an ultrasonic receiving element
Another means is that the reception signal of the ultrasonic receiving element and the ultrasonic transmission
Phase difference from the transmission signal of the
Phase difference detection means for outputting a phase difference signal
When the refueling operation by the
For storing the phase difference signal output from the
Quasi-signal storage means, and output from the phase difference detection means.
Calculate the amount of change of the phase difference signal with respect to the reference signal
Corresponding to the amount of change and the type of oil in the vehicle tank.
The configuration is such that the amount of change is compared. According to the structure of the present invention, the transmission from the ultrasonic transmission element is performed.
The transmitted ultrasonic wave propagates in the suction line and the ultrasonic receiving element
Is received by The ultrasonic propagation state at this time is oil vapor
Depends on the concentration of Therefore, the concentration of this oil vapor
To detect the difference, if you detect the propagation state of the ultrasonic wave
Well, the propagation state of the ultrasonic wave is transmitted from the ultrasonic transmission element
Ultrasonic transmission signal and received by the ultrasonic receiving element
Knowing from the amount of change in the phase difference from the ultrasonic reception signal
Can be. Therefore, the ultrasonic wave is detected by the phase difference detecting means.
Position of the transmitted signal of the transmitting element and the received signal of the ultrasonic receiving element
The phase difference is detected, and the refueling work is started from the refueling nozzle first.
Phase difference signal when the oil vapor concentration is low (air
State), the phase difference signal is measured for the amount of change in the phase difference.
A part of the oil type discrimination means as a reference signal for
It is stored in the reference signal storage means. [0014] Thereafter, the oil type discriminating means is based on the reference signal.
The change amount of the phase difference signal output from the phase difference detection means
Calculates the amount of change and the type of oil in the specified vehicle tank.
Is compared with the amount of change corresponding to
Output a match signal. And this match signal
It is determined whether or not to send the oil liquid based on. An embodiment of the present invention will be described below with reference to FIGS.
A description will be given below. First, a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 6, reference numeral 1 denotes a gas station
The refueling device main body 2 is disposed in the refueling device main body 1.
Fixed pipe 2 is shown at one end thereof.
Side is connected to a tank (not shown) buried under the gas station.
The other end is connected to a refueling hose 6 described later.
You. Then, the fixed pipe 2 supplies the oil liquid together with the oil supply hose 6.
A channel for circulation is formed. Reference numeral 3 denotes an oil supply port provided in the middle of the fixed pipe 2.
Pump 4 is a pump motor for driving the refueling pump.
The liquid is fed by the oil supply pump 3 and the pump motor 4 respectively.
Means. The pump motor 4 will be described later.
The drive and stop are controlled by the control device 12.
Swelling. Reference numeral 5 denotes a flow provided in the middle of the fixed pipe 2.
The flow meter 5 measures the amount of refueling.
The oil amount is transmitted to the control device 12. Reference numeral 6 designates one end side of which is attached to the oiling device main body 1.
The refueling hose 7 is provided on the other end side of the refueling hose 6.
Refueling nozzles are shown, and the refueling nozzle 7
The oil liquid sent from the oil pump 3 is supplied to a vehicle tank (not shown).
)). Reference numeral 8 denotes a nozzle provided on a side surface of the fueling device main body 1.
A nozzle storage part, and the nozzle storage part 8
It is something to hang. In addition, the nozzle housing 8 is supplied with water.
Nose that turns on and off in conjunction with the removal and opening of oil nozzle 7
Switch 9 is provided, and the nozzle switch 9
It is electrically connected to the control device 12. And the said
The slip switch 9 is provided when the refueling nozzle 7 is
Turns on when detached, refueling nozzle 7 accommodates nozzle
It turns off when it is applied to the part 8,
An electric signal is transmitted to the control device 12.
You. Numeral 10 is provided on the front panel of the fueling device main body 1.
The display device 10 is mainly used for refueling.
This is to display the quantity. The display device 10 includes:
An alarm is issued to prevent accidents of refueling with different oil types.
Alarm 11 is attached. Reference numeral 12 denotes a control provided in the fueling apparatus main body 1.
Shows the device, the control device 12 is for discharging the oil liquid
Drive control of pump motor 4, measurement of oil supply by flow meter 5
Measurement processing, control of the display device 10, output from the nozzle switch 9.
Receiving the input electric signal, driving the intake pump 20 described later
It has a function to perform dynamic control and the like. The control device 1
2 is a circuit configuration of the sensor circuit 24 as shown in FIG.
The phase difference detection circuit 29, the sample hold circuit 31,
A constant circuit 33 and the like are built in. Here, the refueling nozzle 7 is shown in FIG.
This will be described in detail with reference to FIG. In FIG. 2, reference numeral 13 denotes a nozzle body.
A discharge pipe 14 is provided on the distal end side of the
At the base end of the nozzle body 13, an oil supply hose 6 will be described later.
The second intake pipe 19 is connected. Also, the nose
The control body 15 is provided with an operation lever 15. Reference numeral 16 denotes an intake provided in the nozzle body 13.
The suction chamber 16 has a steam suction hole 16A on the bottom side.
Is formed, and a steam discharge hole 16B is formed on the side surface.
You. The suction chamber 16 is provided with a steam suction hole 16,
Shield from the outside so that there is no air leakage except for the exit hole 16B.
The room was cut off. Numeral 17 is located on the tip side of the discharge pipe 14.
An intake port 18 provided on the peripheral surface of the discharge pipe 14 is a discharge port.
Each of the first intake pipes arranged in the pipe 14
And one end of the first intake pipe 18 is connected to the intake port 1.
7 and the other end is connected to the steam suction hole 1 of the suction chamber 16.
6A. As a result, the intake chamber 16
Through the mouth 17, the suction pipe 18, and the steam suction hole 16A.
To communicate with the outside world. Reference numeral 19 denotes a second intake pipe, and the second intake pipe
One end of the intake pipe 19 is configured to discharge steam from the intake chamber 16.
The other end is extended along the oil supply hose 6
And connected to the suction pump 20 in the refueling device body 1
I have. Here, the intake chamber 16, the first intake pipe 18
And the second intake pipe 19 constitutes a suction conduit.
You. Reference numeral 20 denotes suction provided in the fueling apparatus main body 1.
Shows an intake pump as a means, the intake pump 20 comprising:
The control of driving and stopping is performed by the control device 12.
It has become. When the intake pump 20 is driven,
Since the inside of the suction chamber 16 has a negative pressure, outside air flows into the suction port 17,
1 through the suction pipe 18 and the steam suction hole 16A.
It is sucked into the air chamber 16. That is, the intake pump 20
Mainly, the discharge pipe 14 of the refueling nozzle 7 is connected to the vehicle tank.
When it is inserted, the oil vapor in the vehicle tank is
6 to be sucked. Numerals 21 and 22 denote superconducting members provided in the intake chamber 16.
A sound wave transmitting element and an ultrasonic wave receiving element.
The wave transmitting element 21 and the ultrasonic receiving element 22 use an oil vapor sensor.
Make up. Then, the ultrasonic transmission element 21
Is provided on one side of the intake chamber 16 as shown in FIG.
The ultrasonic receiving element 22 is
To the suction chamber 1 so as to be separated from and opposed to
6 on the other side. And the ultrasonic transmission element
21 and the ultrasonic receiving element 22 are supersonic as an oil vapor sensor.
The sound wave sensor 23 is constituted. Further, the ultrasonic transmission element 21 is provided
It is electrically connected to the transmission circuit 25 via the drive circuit 26.
And based on the transmission signal from the transmission circuit 25
The sound wave signal S is transmitted to the ultrasonic wave receiving element 22. Sa
Further, the ultrasonic receiving element 22 supplies an electric signal to a receiving circuit 27 described later.
And is transmitted from the ultrasonic transmission element 21.
Received ultrasonic signal S, and a received signal S ′ corresponding thereto.
To the receiving circuit 27. Reference numeral 24 denotes an ultrasonic transmitting element 21 and an ultrasonic receiving element
The output signal of the ultrasonic sensor 23 comprising the probe 22 is processed.
The sensor circuit 24 includes a transmission circuit described later.
Circuit 25, drive circuit 26, receiving circuit 27, oil type discrimination
It comprises a circuit 28 and a timing circuit 34. Ma
Further, the sensor circuit 24 controls, for example, the fueling device main body 1.
It is provided in the device 12. Further, the sensor circuit
24 is a lead wire between the refueling nozzle 7 side and the refueling device main body 1 side
And the like, and the lead wire is connected to a refueling hose 6.
It is arranged along. Here, the sensor circuit 2 based on FIG.
4 will be described in detail. Reference numeral 25 outputs a transmission signal to the drive circuit 26.
The transmission circuit 25 performs the following operations.
6 and an AC signal of a predetermined frequency to the phase difference detection circuit 29.
Is output. The transmission circuit 25 is described later.
Start and stop transmission by timing circuit 34
It is controlled. Reference numeral 26 denotes a drive circuit, and the drive circuit
The path 26 is based on the transmission signal output from the transmission circuit 25.
And a circuit for driving the ultrasonic transmission element 21. This
The ultrasonic transmission element 21 transmits a transmission signal from the transmission circuit 25.
To the ultrasonic receiving element 22 at the same frequency.
And send it. Reference numeral 27 denotes a receiving circuit, and the receiving circuit 27
When the ultrasonic receiving element 22 receives the ultrasonic signal S,
Amplifies received signal S 'output from ultrasonic receiving element 22
Amplifying circuit. Reference numeral 28 denotes a signal amplified and output from the receiving circuit 27.
Of the oil liquid in the vehicle tank based on the received signal S '
The ratio between the seed and the oil type of the oil liquid to be refueled from the refueling nozzle 7
Oil type discriminating means for discriminating whether the two match.
The oil type discrimination circuit shown in FIG.
A phase difference detection circuit 29 and a determination processing circuit 30;
Further, the judgment processing circuit 30 includes the sample and hold circuit 3
1, a differentiation circuit 32 and a judgment circuit 33
I have. Reference numeral 29 denotes a phase difference detector as a phase difference detector.
The phase difference detection circuit 29 includes a transmission circuit 25
The transmission signal output from the
Received and amplified by the receiving circuit 27.
Is input. The phase difference detection circuit 29
By comparing the phases of the transmission signal and the reception signal S ',
Outputs a phase difference detection signal having a voltage value corresponding to the phase difference
For example, a phase comparator and L
It is composed of a PF or the like. In addition, the phase difference detection circuit
The phase difference detection signal output from the path 29 is
Circuit 31, the differentiation circuit 32, and the judgment circuit 33, respectively.
Is forced. Here, the signal transmitted from the ultrasonic transmitting element 21 is transmitted.
The ultrasonic signal S is indicated by an arrow indicated by a two-dot chain line in FIGS.
As shown in FIG.
The wave reaches the wave receiving element 22. At this time, the ultrasonic signal S
The propagation speed in the suction chamber 16 varies depending on the concentration of the oil vapor.
It is known. And the propagation speed of the ultrasonic signal S
Is the ultrasonic signal transmitted from the ultrasonic transmission element 21.
No. S and the ultrasonic wave at the time of being received by the ultrasonic receiving element 22
The relative knowledge can be obtained by examining the phase difference with the signal S.
Can be. Based on this, the phase difference detection circuit 29
Is a transmission signal output from the transmission circuit 25 and an ultrasonic reception signal.
Output from the receiving element 22 and amplified by the receiving circuit 27.
By comparing the phase of the received signal S '
A magnitude corresponding to the phase difference between when transmitting and receiving the signal S
It outputs a phase difference detection signal. Therefore, the output from the phase difference detection circuit 29 is
The voltage value of the phase difference detection signal is determined by the propagation speed of the ultrasonic signal S.
Degree, that is, changes corresponding to the concentration of oil vapor in the intake chamber 16.
I do. Reference numeral 31 denotes a sample as a reference signal storage means.
1 shows a hold circuit, and the sample hold circuit 31
The phase difference detection signal output from the phase difference detection circuit 29 is output.
Sampling and holding force voltage
Circuit. Then, the sample hold circuit 31
The output voltage of the stored phase difference detection signal is used as the reference signal.
And outputs it to the determination circuit 33. In addition, the sample
The hold circuit 31 is controlled by the timing circuit 34 to
Timing that samples and holds the output voltage of the difference detection signal
Is controlled. Reference numeral 32 denotes a differentiating circuit.
Is a phase difference detection signal output from the phase difference detection circuit 29
Is differentiated and a differentiated signal is output. This differential signal
The voltage is the voltage per minute time of the phase difference detection signal.
A signal that changes according to the magnitude of the change.
When it is large, it is determined that oil vapor has entered the intake chamber 16
I do. Reference numeral 33 denotes a machine having a built-in CPU, memory, and the like.
FIG. 2 shows a determination circuit configured by an microcomputer,
The output from the phase difference detection circuit 29 is output to the determination circuit 33.
The phase difference detection signal output from the sample and hold circuit 31
Reference signal and the differential signal output from the differentiation circuit 32
Number is entered. In addition, the information stored in the determination circuit 33 is stored.
The storage unit stores the oil liquid supplied by the oil supply device main body 1.
Oil type data is stored. Note that this oil type data
This will be described later. Then, the judgment circuit 33 outputs the phase difference detection signal.
Judgment processing based on signal, reference signal, oil type data, etc.
Perform and determine the oil type. And the oil liquid in the vehicle tank
The oil type and the oil type of the oil liquid to be refueled from the refueling nozzle 7 are
When they match, a match signal is output, and when they do not match,
Outputs a mismatch signal. And the control device 12
Pump mode based on these coincidence and non-coincidence signals.
Drive 4 to control whether or not to send the oil liquid.
You. Reference numeral 34 denotes a timing circuit.
The nozzle circuit 34 is provided with a nozzle switch
The transmission circuit 25 and the sun
A circuit for controlling the drive timing and the like of the pull hold circuit 31
Road. The lubricating apparatus according to this embodiment has the above-described structure.
Next, refueling by the refueling device
The operation at the time will be described with reference to FIGS.
You. In FIG. 5, in step 1, a nozzle switch
Check whether 9 is ON or not, and if it is ON, judge “YES”
To step 2, and if it is OFF, it is determined as "NO".
Step 1 is repeatedly executed. That is, the nozzle switch
When the switch 9 is turned on, the refueling nozzle 7 is
Is removed from the nozzle accommodating portion 8 of the refueling device body 1
And when the refueling operation is started. Next, at step 2, the intake pump 20
When driven, outside air is supplied to the intake port 17, the intake pipe 18 and the like.
And is sucked into the suction chamber 16 through the steam suction hole 16A.
You. Thereby, the inside of the suction chamber 16 is filled with the air in the atmosphere.
It is. At this point, the refueling nozzle 7 is still in the vehicle
It is not inserted into the link. Next, in step 3, the nozzle switch 9
Is turned on, the timing circuit 34
The transmission circuit 25 is driven. Thereby, the transmission circuit 25
The transmission signal is output from the
A wave signal S is transmitted. Then, the signal transmitted from the ultrasonic transmitting element 21 is
Ultrasonic signal S propagates in the air atmosphere in the suction chamber 16
Then, it reaches the ultrasonic receiving element 22. And the ultrasonic signal
The ultrasonic receiving element 22 that has received the signal S
And outputs a reception signal S '.
The signal is amplified by the path 27 and input to the phase difference detection circuit 29. Then, the phase difference detection circuit 29
5 is the ratio of the phase of the transmission signal and the phase of the reception signal S '.
Phase difference detection having a voltage value based on the phase difference between the two signals.
The output signal is output to the sample and hold circuit 31, the differentiation circuit 32,
It is output to each of the constant circuits 33. This time sump
The hold circuit 31 is driven by a timing circuit 34.
(Trigger signal is input) and the phase difference detection signal
Sample and hold the pressure. Hold at this time
The voltage of the detected phase difference detection signal is used as a reference signal in FIG.
Until the oil type determination in step 7 is completed, the memory
Be held. In addition, during steps 2 to 4,
When the refueling operation by the refueling nozzle 7 is started,
The oil nozzle 7 is removed from the nozzle housing 8 and
It is executed before it is inserted. In step 5, the phase difference detection circuit 29
The phase difference detection signal input to the differentiating circuit 32 is
2 and the differential signal output from the differentiation circuit 32
Signal is received by the judgment circuit 33 and the change is started to be monitored.
You. Next, in step 6, the judgment circuit 33
Therefore, the voltage of the differentiated signal of the differentiating circuit 32 becomes higher than a predetermined value.
That is, whether the suction chamber 16 is filled with oil vapor or not.
Is checked to determine whether or not the oil type can be determined. That is, the worker accommodates the fuel supply nozzle 7 in the nozzle.
Remove from the part 8 and insert it into the vehicle tank etc.
The oil vapor inside is sucked into the suction chamber 16 by the suction pump 20.
As a result, the inside of the suction chamber 16 is filled with oil vapor. This
The ultrasonic signal transmitted from the ultrasonic transmitting element 21
S will propagate in the atmosphere of this oil vapor
Therefore, the propagation speed of the ultrasonic signal S changes suddenly. And this
According to the phase difference detection circuit 29
The voltage value of the output signal changes greatly. Therefore, the voltage of the differential signal becomes higher than a predetermined value.
It is found that the refueling nozzle 7 is
Oil vapor is sucked into the suction chamber 16 and
It is possible to determine that the species can be determined
You. Then, in step 6, the voltage of the differential signal is
If the value exceeds a predetermined value, the oil type can be determined.
Therefore, the determination is “YES” and the process proceeds to step 7 in FIG.
I do. On the other hand, when the voltage of the differential signal does not exceed
Means that the refueling nozzle 7 is not inserted into the vehicle tank,
NO is determined because the oil type determination is not yet possible
Return to step 5 and repeat steps 5 and 6
I do. At step 7, the oil type is determined. Oil type
Judgment is made at the point when the phase difference detection
The phase difference detection signal output from the
Change with the reference signal stored and held in the hold circuit 31
Amount, that is, a voltage difference, and this voltage difference is stored in the determination circuit 33 in advance.
By comparing with the oil type data stored
U. That is, the phase at the time when the oil vapor is sucked
The difference detection signal is sucked into the intake chamber 16 from the vehicle tank.
When transmitting and receiving the ultrasonic signal S propagating in the oil vapor atmosphere
Corresponds to the phase difference with Shinto, that is, in an oil vapor atmosphere
Corresponding to the propagation speed of the ultrasonic signal S. On the other hand, the reference signal is immediately before refueling (refueling noise
When the refueling work by the fuel nozzle 7 is started,
7 before being inserted into the vehicle tank).
At the time of transmitting the ultrasonic signal S propagating in the atmosphere of the drawn air
Corresponding to the phase difference between
Corresponding to the propagation speed of the ultrasonic signal S. Here, generally, the propagation speed of the ultrasonic signal
Is air> light oil> gasoline, which is the fastest in the atmosphere, followed by light oil and gasoline.
Is known to be slow. Therefore, the ultrasonic signal S in the air atmosphere is
The phase difference and the phase difference of the ultrasonic signal S in the oil vapor atmosphere
The difference (change amount) between oil vapor is light oil and gasoline
Depending on the time, the amount of change within a predetermined range and
Become. Therefore, the judgment circuit 33 determines whether the refueling operation should be performed.
The ultrasonic signal S propagates through the air atmosphere
Phase difference detection signal (reference signal) and the ultrasonic signal S
With the phase difference detection signal when
Find the voltage difference. The storage unit of the determination circuit 33 stores the ratio
The voltage difference serving as a comparison reference, that is, the refueling device body 1
Voltage difference or oil vapor when the oil type
When the gas is gasoline, the voltage difference etc.
It is stored in advance as enclosed oil type data. Soshi
The determination circuit 33 determines the voltage difference obtained during the refueling operation.
And the oil type data stored in the storage unit of the determination circuit 33.
And the value of the voltage difference obtained during refueling work is
Oil or light oil falls within the permissible range of oil type data
To determine the oil type. Further, the judgment circuit 33 determines whether or not the
Phase difference of sound wave signal S and ultrasonic signal S in oil vapor atmosphere
Oil type is determined based on the difference (change amount) from the phase difference
Of the propagation speed of the ultrasonic signal S depending on the temperature of the atmosphere
Becomes irrelevant. That is, the two factors of oil type determination, large
Phase difference of ultrasonic signal S in oily atmosphere
The phase difference of the ultrasonic signal S was detected under the same temperature condition
The propagation speed of the ultrasonic signal S due to temperature change
The degree errors will cancel each other out. Therefore, the atmosphere
Accurate oil type determination without being affected by air temperature
it can. Next, in step 8, as a result of the oil type determination,
When the oil type to be refueled matches the oil type in the vehicle tank
Determines “YES” and outputs a match signal from determination circuit 33.
And go to step 9. On the other hand,
Determines “NO” and outputs a mismatch signal from the determination circuit 33.
And go to step 14. And step 14
Now, alert the workers that the oil type is different by alerting them.
Alarm 11 and the pump motor
The driving of No. 4 is prohibited so that refueling cannot be performed. Next, at step 9, the operation of the intake pump 20 is started.
Is stopped, and the pump motor 4 is driven in step 10 to stop
At step 11, refueling is started. Next, at step 12, the nozzle switch
It is checked whether or not 9 has been turned off. That is, refueling ends
Then, the worker puts the refueling nozzle 7 on the nozzle housing 8.
Therefore, the nozzle switch 9 is turned off. And no
If the spill switch 9 is turned off, answer "YES".
The process proceeds to step 13 and the nozzle switch 9 is
In the case of N, it is judged as “NO” because refueling is in progress.
Step 12 is repeatedly executed. Next, at step 13
Stops the pump motor 4 and returns in step 15.
You. Thus, according to the present embodiment, the intake chamber 16
The ultrasonic transmitting element 21 and the ultrasonic receiving element 22
And transmitted from the ultrasonic transmitting element 21.
And propagates through the atmosphere of the oil vapor in the intake chamber 16 to produce a supersonic
Oil based on the ultrasonic signal S received by the wave receiving element 22
Since the type determination is performed, the ultrasonic transmission element 21
Even if the installation accuracy of the sound wave receiving element 22 is not increased, the ultrasonic wave
The transmission and reception of the signal S can be performed reliably. Therefore,
As in the case of technology, ultrasound transmission is
The ultrasonic transmission element 2
1, even if the installation accuracy of the ultrasonic receiving element 22 is lowered,
The transmission of the wave signal S can be performed reliably, and the accurate oil type
A determination can be made. This enables processing, assembly, etc.
It can be greatly simplified. Further, according to the present embodiment, the phase difference detecting circuit
29, the ultrasonic transmitting element 21 and the ultrasonic receiving element 2
2 propagates in the atmosphere of the oil vapor in the suction chamber 16.
The phase difference between the transmission and reception of the ultrasonic signal S is obtained, and
Oil type judgment based on the phase difference detection signal corresponding to
The speed of propagation of the ultrasonic signal S
Can greatly increase the accuracy of oil type determination.
be able to. In particular, the ultrasonic reflection echo of the prior art
For those that measure the propagation time of ultrasonic waves using
Judgment of the arrival timing of the echo is difficult, which is erroneously detected
According to the present invention, such a
Propagation speed of the ultrasonic signal S without the need to determine the timing
To greatly improve detection sensitivity and accuracy for changes in
Can be. Thus, according to the present embodiment, the ultrasonic signal S
Of air and light oil with small changes in air propagation speed
It can be carried out. Further, according to the present embodiment, the refueling nozzle 7
Propagation in air atmosphere when refueling work is started
Based on the voltage of the phase difference detection signal based on the ultrasonic signal S
Stored in the sample and hold circuit 31 as a signal,
Phase difference detection based on ultrasonic signal S propagating in steam atmosphere
Oil by the voltage difference (change amount) between the output signal and the reference signal.
Because it is configured to perform species judgment, it depends on the temperature change of the atmosphere.
Oil type determination regardless of the change in the propagation speed of the ultrasonic signal S
It can be carried out. That is, ultrasonic waves under the same temperature conditions
Between the phase difference detection signal based on the phase difference of the signal S and the reference signal.
Because oil type judgment is performed based on the voltage difference (change amount), temperature
The errors in the propagation speed of the ultrasonic signal S due to the quantization cancel each other out.
Will be able to Therefore, when determining the oil type,
Oil type judgment can be performed without being affected by temperature changes.
Performance and reliability of oil type judgment can be greatly improved.
And it is also necessary to provide a processing circuit for temperature compensation.
Therefore, the circuit configuration and the like can be simplified. Next, a second embodiment of the present invention will be described with reference to FIG.
The feature of the present embodiment is that an ultrasonic transmitting element
The provision of the ultrasonic receiving element and the
You. Note that, in this embodiment, the first embodiment described above is used.
The same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
It shall be omitted. In the figure, reference numeral 41 is provided inside the fueling apparatus main body 1.
Shows an intake chamber provided in the middle of the intake pipe 19.
The suction chamber 41 is connected to the ultrasonic transmission element 42 and the ultrasonic reception element.
And an ultrasonic receiving element 43 is provided.
So as to be separated from and opposed to the sound wave transmitting element 42.
Are located. Then, the ultrasonic transmitting element 42 and the ultrasonic
The receiving element 43 is an ultrasonic sensor 4 as an oil vapor sensor
4. During the refueling operation, the suction pump 20
By driving, oil vapor is sucked into the intake chamber 41,
The ultrasonic signal S transmitted from the ultrasonic receiving element 42 is
The ultrasonic wave propagating in the oil vapor atmosphere in the air chamber 41
The child 43 is reached. And it is almost the same as the first embodiment.
Thus, based on the phase difference between the transmission and reception of the ultrasonic signal S,
The oil type is determined. With such a configuration, the first embodiment
The same operation and effect as the embodiment can be obtained. In each of the above embodiments, gasoline is mainly used.
Or, it was stated that the oil type judgment for light oil was performed,
The present invention is not limited to this, but may be used for determining other oil types such as kerosene.
It can be applied in any case. In each of the above embodiments, the
The fixed type lubricating device to which the lubricating device main body 1 is attached is exemplified.
Is an elevated structure such as a gas station ceiling, canopy or beam
The oil supply nozzle up and down via the oil supply hose
The present invention may be applied to a suspension type lubrication device. In this case, refuel
The suction pump that sucks oil vapor from the nozzles
It can be installed inside the hose lifting device.
It may be provided in an itch box. The intake pump 20 is located inside the fueling device main body 1.
The nozzle body 13 of the refueling nozzle 7
It may be built in. In each of the embodiments, the oil type determination is performed.
Although the imaging was performed by the differential signal of the differentiating circuit 32,
If it can be determined that oil vapor is filled in the air chamber 16,
However, the nozzle switch 9 is turned ON and
After the suction by the pump 20 is started, the oil vapor
Set a sufficient time before filling up in advance.
The oil type determination may be performed when the predetermined time has elapsed.
Also, check that the discharge pipe 14 has been inserted into the vehicle tank.
Whether the operating sensor or operating lever 15 is operated
Sensors for detecting the presence or absence of
The oil type may be determined according to the number. In each of the above embodiments, the reference signal and the oil
Voltage with phase difference signal when steam fills intake chamber 16
The oil type was determined based on the difference (change amount), but the present invention
Not limited to this, even if the oil type is determined based on the rate of change of the phase difference signal,
Good. As described in detail above, according to the present invention,
The air sensor transmits an ultrasonic wave that propagates ultrasonic waves in the suction line.
Communication element and the ultrasonic transmission element
And an ultrasonic receiving element provided to
The oil type discriminating means is configured to determine whether the received signal of the ultrasonic receiving element is
The phase difference from the transmission signal of the sound wave transmitting element is detected, and the phase
Phase difference detection means for outputting a phase difference signal based on the difference,
When the oil nozzle starts refueling work, the phase difference is detected.
The phase difference signal output by the means is stored as a reference signal.
Reference signal storage means for performing the phase difference detection means.
Of the phase difference signal output from the reference signal with respect to the reference signal
Is calculated, and the change amount and the oil type of the oil liquid in the vehicle tank are calculated.
We decided to compare the amount of change
Conventional technology for measuring the propagation time of ultrasonic waves using echo
Ultrasonic transmission element, ultrasonic reception element
Even if the placement accuracy of the
It is possible to detect accurately and improve the accuracy of oil type detection.
Can be Therefore, machining and assembly are greatly simplified.
Can be Further, it is possible to reliably prevent erroneous detection of the oil vapor concentration.
And greatly improve the accuracy of oil type determination.
Can be. In particular, ultrasonic reflection echo
In the prior art for measuring the propagation time, the ultrasonic
It is difficult to determine the arrival time of
According to the present invention, such a tie
There is no need to determine
Detection sensitivity and accuracy can be greatly improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall view showing a fueling device according to a first embodiment of the present invention. FIG. 2 is an overall view, partially broken away, showing a fueling nozzle according to a first embodiment of the present invention. FIG. 3 is an enlarged sectional view showing an ultrasonic transmitting element, an ultrasonic receiving element, and the like in FIG. 2; FIG. 4 is a block circuit diagram showing a sensor circuit according to the first embodiment. FIG. 5 is a flowchart showing a refueling operation by the refueling device of the first embodiment. FIG. 6 is a flowchart showing a refueling operation following FIG. 5; FIG. 7 is an overall view showing an oil supply device according to a second embodiment of the present invention. [Description of Signs] 1 Oil supply device main body 2 Fixed piping (flow path) 3 Oil supply pump (liquid supply means) 4 Pump motor (liquid supply means) 6 Oil supply hose (flow path) 7 Oil supply nozzles 16 and 41 Intake chamber (suction pipe) Road) 18, 19 Intake pipe (suction pipe) 20 Intake pump (suction means) 21, 42 Ultrasonic transmitting element (oil vapor sensor) 22, 43 Ultrasonic receiving element (oil vapor sensor) 24 Sensor circuit 28 Oil type discrimination Circuit (oil type determination means) 29 Phase difference detection circuit (phase difference detection means) 30 Judgment processing circuit 31 Sample hold circuit (reference signal storage means) 33 Judgment circuit

Continuation of front page (56) References JP-A-49-84296 (JP, A) JP-A-55-87037 (JP, A) JP-A-56-1347 (JP, A) JP-A-4-128192 (JP) JP-A-4-327193 (JP, A) JP-A-4-339799 (JP, A) JP-A-6-156598 (JP, A) JP-A-6-242084 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B67D 5/00 G01N 29/18

Claims (1)

(57) [Claim 1] A liquid sending means provided in the middle of a flow path one side of which is connected to a tank, and a liquid sending means provided on the other side of the flow path and supplied from the liquid sending means. An oil supply nozzle for discharging the oil oil into the oil storage tank, a suction line having one end open at the tip of the oil supply nozzle, and a suction means connected to the other end for suctioning the atmosphere near the tip of the oil supply nozzle, An oil vapor sensor that is provided in the middle of the pipe and outputs a signal corresponding to the concentration of oil vapor sucked by the suction means when the oil supply nozzle is inserted into the vehicle tank; and an output signal of the oil vapor sensor. The oil type of the oil liquid in the vehicle tank and the oil type of the oil liquid sent by the liquid sending means based on the oil type, and an oil type determining means for determining whether or not the two match. The oil vapor sensor propagates ultrasonic waves in the suction line An ultrasonic transmitting element, and an ultrasonic receiving element provided to be separated from and opposed to the ultrasonic transmitting element, wherein the oil type discriminating means includes a receiving signal of the ultrasonic receiving element and the A phase difference detection unit that detects a phase difference with a transmission signal of the ultrasonic transmission element and outputs a phase difference signal based on the phase difference; and a phase difference detection unit that outputs when a refueling operation by the refueling nozzle is started. Reference signal storage means for storing the obtained phase difference signal as a reference signal,
Calculating a change amount of the phase difference signal output from the phase difference detection unit with respect to the reference signal, and comparing the change amount with a change amount corresponding to an oil type of the oil liquid in the vehicle tank. Refueling equipment.