JP2014025823A - Detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detection device for refueling machines, which is capable of; identifying types of fuel being handled and providing a quick response when a wrong type of fuel is handled; and identifying trapped water and air in fuel and providing a quick response when the trapped water and air are more than certain levels.SOLUTION: An irradiator (2) (such as an optical fiber connected to a laser light source) which emits non-diffusing light (which is light with extremely high directivity such as laser light) and a photoreceptor (6) (such as a photodiode and phototransistor) which receives the non-diffusing light are installed within a refueling system (e.g., in piping, a pump unit, or a fuel filler tube).

Description

  The present invention relates to a detection apparatus that is used in an oil supply apparatus that handles a plurality of oil tumors, for example, gasoline, light oil, kerosene, and the like and that determines the type of oil that is handled by the oil supply apparatus.

Examples of the oil handled at the gas station include gasoline, light oil as fuel for automobiles, and kerosene as fuel for heating. These oils are respectively stored in oil storage tanks provided in the basement of the gas station, and sold to customers by a fueling device.
Here, if you make a mistake in supplying gasoline to a light oil vehicle, or if you make a mistake in supplying light oil to a gasoline vehicle (incorrect fueling), an engine trouble will be caused and a traffic accident will occur. There is a risk of causing it.
In addition, there is a possibility of causing a fire accident if gasoline is mistakenly supplied to the tank of a customer who has purchased kerosene and this oil is supplied to the heater.

If such refueling has been done, contact the customer if the purchased customer is known, or contact the supervisory agency if the customer is unclear, ask for cooperation, and contact the buyer through public relations activities. You need to find and contact them to prevent accidents.
In any case, a great deal of labor is required. Then, it is sufficient that treatment can be performed at a stage before some kind of accident occurs, but there is a possibility of causing an accident as described above if communication with the purchaser is delayed.
In addition, when oil is supplied to the oil storage tank of the gas station, a tank truck is used. At this time, if the wrong type of oil is unloaded from the tank truck to the underground tank, a plurality of types of oil will be mixed in the underground tank. If oil is sold without noticing that it has been unloaded unintentionally, there is a risk of causing an accident as described above.

As a conventional technique, for example, there is a technique in which a vapor concentration is detected by a combustion gas sensor or a semiconductor gas sensor, and an oil type is discriminated using a concentration difference (see Patent Document 1).
However, there are cases in which such a conventional technique (Patent Document 1) cannot be determined. Further, when a water draining agent is used, there is a risk that if the water draining agent has a high vapor pressure and a high vapor concentration, it malfunctions and the oil type is erroneously determined.

JP-A-1-199900

  The present invention has been proposed in view of the above-described problems of the prior art, and is a detection device used in an oil supply device, which determines the type of oil being handled and handles an incorrect oil type. It is an object of the present invention to provide a detection device that can promptly cope with the situation.

  The detection device (1) of the present invention includes an irradiation device (2) that irradiates light that does not diffuse (LX: light with extremely good directivity, for example, laser light) (for example, an optical fiber connected to a laser light source), A light receiving device (6) (for example, a photodiode, a phototransistor, or the like) that receives the light that does not diffuse is provided in an oil supply system (for example, the pipeline 5, the pump unit 27, the lubrication pipe 23, or the like). .

  In this invention, it is preferable that the control unit (8) includes a control unit (8), and the control unit (8) has a function of determining the oil type from the position where the light receiving device (6) receives light that is not diffused.

In carrying out the present invention, the oil supply system is preferably an oil supply pipe.
The oil supply system is preferably a pipe in the pump unit (27).
Alternatively, the oil supply system is preferably an oil supply pipe (23) communicating with an oil storage tank (22) of the oil supply station (21).

In the present invention, the control unit (8) has a function of determining a mixing rate of foreign matters (water, air) mixed in oil in the oil supply system from the amount of light received by the light receiving device (6) that is not diffused. It is preferable to have.
In this case, the control unit (8) determines the type of foreign matter from the amount of fluctuation per unit time of the amount of received light received by the light receiving device (6) (determines whether the foreign matter is water or air). It is preferable to have a function.

According to the present invention having the above-described configuration, the path through which the non-diffusing light (LX: laser light, for example) passes through the oil changes depending on the refractive index of the oil in the oil supply system, and the light receiving device (6) The position (pin point position, point-like position) for receiving the light (LX) that does not diffuse varies depending on the refractive index of the oil in the oil supply system.
Therefore, the refractive index of the oil in the oil supply system can be obtained from the position where the light (LX) that does not diffuse is received in the light receiving device (6). And if the refractive index of the oil in an oil supply system is calculated | required, the oil kind will also be determined.
Thereby, according to this invention, the oil in an oil supply system can be monitored and the oil kind can be discriminate | determined.

In the present invention, a control unit (8) having a function of determining the oil type from the position where the light receiving device (6) receives the light (LX) that does not diffuse is provided, and the detection signal of the light receiving device (6) is sent to the control unit (8 ), The oil type can be immediately identified from the light receiving position of the light receiving device (6).
Even when different types of oils are mixed, the refractive index varies depending on the mixing ratio. Then, the history of the refractive index of the oil in the oil supply system is stored, and by comparing the refractive index fluctuation with the past history, it is determined whether or not different types of oil are mixed. I can do it.

  In the detection device of the present invention, if the oil supply system is an oil supply pipe communicating with an oil storage tank (25) of a gas station (21: a gas station or the like), for example, unloading from the tank truck (31) to the oil storage tank (22) is performed. Even when the wrong oil type is supplied to the oil storage tank (22) (so-called “contamination” occurs), the wrong oil is immediately determined from the refractive index of the oil that has entered the lubrication pipe (23). By detecting that the seeds are supplied, necessary processing such as unloading can be executed.

Here, at the gas station (21), a large amount of water may flow into the oil storage tank (22) provided underground due to the influence of heavy rain. In addition, cracks and holes may be formed in the piping (for example, the lubrication pipe 23) due to piping work and corrosion, and water may enter from there.
If water is mixed for various reasons, fuel oil containing water is supplied to the vehicle and the fuel oil (including water) flows into the combustion chamber of the engine. There is a risk that the engine may stop, possibly resulting in the worst situation of engine damage.

  If the fuel oil (fuel oil mixed with water) is sold without being able to detect that water is mixed in the fuel oil, it is necessary to check the sales customer data and contact each customer. A great deal of effort must be expended in handling or responding to such matters as reporting to the supervisory authorities.

On the other hand, when air is mixed into the fuel oil, the amount of fuel actually supplied to the vehicle (actual oil supply amount) is less than the fuel supply amount (measured value: display value) measured by the flow meter. This will cause a problem of weighing accuracy.
In this way, troubles in underground oil storage tanks and underground piping systems, especially if water or air enters the fuel, may cause serious problems, so monitor and remediate immediately, especially before refueling the vehicle. It is hoped that.

In the present invention, the control unit (8) determines the mixing rate of foreign matters (water, air) mixed in the oil in the oil supply system from the amount of light received by the light receiving device (6) that does not diffuse. If foreign matter is mixed in the oil in the flow path, the foreign matter is mixed in the oil as fine particles, and the laser beam irradiated in the oil is irradiated to the foreign matter. When it is done, the laser beam is reflected. As a result, the amount of laser light reaching the light receiving device is reduced.
Therefore, if the amount of laser light reaching the light receiving device is obtained, it is possible to determine the proportion of foreign matter in the oil, that is, the mixing rate of water, air, etc. (so-called “foreign matter”).

Here, it is known that the amount of light reflected by a foreign object has a small amount of fluctuation when the foreign object is water, for example, but is large when the foreign object is air.
In the present invention, if the control unit has a function of determining the type of foreign matter (determining whether the foreign matter is water or air) from the amount of fluctuation per unit time received by the light receiving device. When determining the contamination rate of foreign matter (water / air), the type of foreign matter (water or air) can be determined from the amount of change in the amount of reflected light due to the foreign matter.

It is a block diagram of a 1st embodiment of the present invention. It is a figure which shows the relationship or characteristic of a refractive index, fuel oil, and a mixing rate. It is a block diagram which shows the control unit which discriminate | determines oil kind in 1st Embodiment. In the first embodiment, it is a flowchart showing an aspect of control for discriminating oil types. It is explanatory drawing of the filling station which incorporated the detection apparatus in the oil supply pipe | tube. It is a top view of the pump unit incorporating a detection apparatus. It is a block diagram of a 2nd embodiment of the present invention. In 2nd Embodiment, it is a block diagram which shows the control unit which calculates | requires the mixing rate of water or air. In 2nd Embodiment, it is a flowchart which shows the control which calculates | requires the mixing rate of water or air.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIGS. 1-6 has shown 1st Embodiment of this invention, and has shown the detection apparatus for identifying oil types, for example, gasoline, light oil, kerosene, etc. FIG.
In FIG. 1, a detection device generally indicated by reference numeral 1 is incorporated in an oil supply system of an oil supply device 25 (see FIG. 5), for example, a pipeline 6.
The detection device 1 includes an irradiation device 2, and the irradiation device 2 includes an optical fiber 4. Light that does not diffuse from the light source 3 through the optical fiber 4 (light with extremely good directivity, for example, laser light, hereinafter) Is transmitted from the end of the optical fiber 4 (right end in FIG. 1) into the pipe 5.
Although not clearly shown in FIG. 1, the light source 3 is provided at a position separated from the fuel supply device (an area where no explosion-proof structure is required).

In the pipe 5, a light receiving device 6 is provided on the opposite side of the irradiation device 2. The light receiving device 6 includes a plurality of light receiving elements (for example, photodiodes, phototransistors, image sensors, etc.) 7a, 7b. A detection signal generated by the light receiving device 6 is sent to the control unit 8 via the signal line SL1, and the control unit 8 performs oil type discrimination.
A signal indicating the type of oil that should be present in the pipeline 5 (the type of oil to be handled) is input to the control unit 8 from the control device 9 of the entire oil supply device via the signal line SL2. On the other hand, a signal indicating the result of oil type discrimination is sent from the control unit 8 to the control device 9 of the entire oil supply device via the signal line SL3. And it is comprised so that safety measures, such as a warning mentioned below and an operation stop, may be performed.
In the second embodiment to be described later, the control unit 8 is configured to have a function of determining the mixing rate of foreign matters such as water and air.

In FIG. 1, a region in the pipe 5 where the irradiation device 2 and the light receiving device 6 are installed is formed of a translucent member so that laser light can pass therethrough.
The laser beam LX irradiated from the optical fiber 4 of the irradiation device 2 is a boundary between the optical fiber 4 and the conduit 5, a boundary between the conduit 5 and the oil 10 in the conduit 5, and between the oil 10 and the conduit 5. The light is refracted at the boundary and irradiated to the light receiving device 6. In the light receiving device 6, the light receiving elements 7a, 7b... Irradiated with the laser light generate detection signals, and the detection signals from the light receiving device 6 are sent to the control unit 8 via the signal line SL1.

Here, the use of the optical fiber 4 connected to the laser light source 3 as the irradiation means of the laser light LX can surely transmit the laser light LX to a place separated from the laser light source 3, This is because an amplifying device is not required, so that it is not necessary to have an explosion-proof structure even if the amplifying device is incorporated as a laser beam LX irradiation means in the oil supply device.
As described above, the laser light source 3 is provided in an area that does not require an explosion-proof structure.

In the light receiving device 6, the position irradiated with the laser light LX varies depending on the refractive index of oil in the pipe 5.
Therefore, the refractive index of the oil in the pipe line 5 can be obtained from the position where the light receiving device 6 is irradiated with the laser light LX, and the oil type of the oil in the pipe line 5 can be determined from the refractive index.

FIG. 2 is a graph showing the refractive indices of winter light oil, summer light oil, kerosene, winter gasoline, and summer gasoline. In this graph, the bar-shaped parts labeled “Winter Light Oil”, “Summer Light Oil”, “Keose Oil”, “Winter Gasoline”, and “Summer Gasoline” are respectively in the case where the mixing rate is 0%. The range of refractive index is shown.
In FIG. 2, a straight line L indicates the characteristics of the refractive index and the kerosene mixing ratio when kerosene is mixed with summer light oil, and the left end of the straight line L indicates the refractive index when summer light oil is 100%. The right end of L indicates the refractive index when kerosene is 100%. As indicated by this straight line L, the refractive index varies depending on the mixing ratio of different types of oil.

In FIG. 1, the refractive index of oil in the pipe 5 is determined from the position where the laser beam LX is irradiated on the light receiving device 6, and it exists in the pipe from the refractive index using the characteristic diagram as shown in FIG. 2. Oil type can be determined.
Although the mixing ratio of different types of oil cannot be obtained from the light receiving range of the light receiving device 6, the history of the refractive index of the oil in the pipe is stored, and the change in the refractive index is compared with the past history. By doing so, it is possible to determine whether or not different types of oil are mixed.

Next, the control unit 8 for oil type discrimination will be described with reference to FIG.
In FIG. 3, the control unit 8 includes a storage block 11, a light receiving position determination block 12, a refractive index determination block 13, an oil type determination block 14, and an alarm determination block 15.
The control unit 8 is connected to the control device 9 of the entire fueling device 25 (see FIG. 5) through signal transmission lines SL2 and SL3 so that signals or information can be transmitted and received.

The storage block 11 of the control unit 8 stores the relationship between the light receiving position and the refractive index, the relationship between the refractive index and the oil type, and the like. Data (characteristic diagram data, chart data, etc.) indicating the relationship between the light receiving position and the refractive index is transmitted to the refractive index determination block 13 via the signal line SL4, and indicates the relationship between the refractive index and the oil type. Data (characteristic diagram data, chart data, etc.) is transmitted to the oil type determination block 14 via the signal line SL5.
The light receiving position determining block 12 determines the light receiving position of the laser beam LX in the light receiving device from the detection signal (light receiving signal) transmitted from the light receiving device 6 via the signal line SL1, and the determined light receiving position is used as the refractive index determining block. 13 to transmit to
The refractive index determination block 13 is based on the light receiving position transmitted from the light receiving position determination block 12 (the light receiving position of the laser beam LX in the light receiving device) and the data indicating the relationship between the light receiving position transmitted from the storage block 11 and the refractive index. The refractive index of the oil in the pipeline 5 is determined, and the determined refractive index (in the refractive index determination block 13) is transmitted to the oil type determination block 14.

Based on the refractive index determined by the refractive index determination block 13 and the data indicating the relationship between the refractive index and the oil type transmitted from the storage block 11, the oil type determination block 14 determines the type of oil in the pipeline 5 ( The oil type) is determined and the determined oil type (in the oil type determination block 14) is transmitted to the alarm determination block 15.
The alarm determination block 15 is configured to be able to receive information or a signal indicating the type of oil that should be in the pipe line 5 from the control device 9 of the entire oil supply device via the signal line SL2. The alarm determination block 15 includes the oil type (the type of oil in the pipe line 5) transmitted from the oil type determination block 14 and the oil to be present in the pipe line 5 transmitted from the control device 9 of the entire oil supply device. It has a function of comparing the seed and transmitting the result to the control device 9 via the signal line SL3.
More specifically, if the oil types match, a signal indicating normality is transmitted from the alarm determination block 15 to the control device 9 via the signal line SL3. On the other hand, if the oil types are different, the alarm determination block 15 supplies the wrong type of oil to the alarm means 17 and the stop means 18 of the control device 9 via the signal line SL3. This signal (error oil type signal) is sent out, an alarm is issued, and the refueling operation is stopped.

Next, a control mode in the first embodiment will be described based on the flowchart of FIG.
In step S <b> 1 of FIG. 4, it is determined whether or not the light receiving device 6 has received the laser light LX emitted from the irradiation device 2. When the laser beam LX emitted from the irradiation device 2 is input to the light receiving device 6 and a light reception signal is input from the light receiving device 6 to the control unit 8 via the signal line SL1 (step S1 is “YES”), the process proceeds to step S2. .
In step S2, the position where the laser light LX is received by the light receiving device 6 is determined by the light receiving position determination block 12 of the control unit 8, and the determined light receiving position (the position where the laser light LX is received by the light receiving device 6) is determined. Then, the process proceeds to step S3.

In step S3, based on the light receiving position determined by the light receiving position determining block 12 and the data indicating the relationship between the light receiving position and the refractive index transmitted from the storage block 11, the refractive index determining block 13 Determine the refractive index of the oil. Then, the determined refractive index is transmitted to the oil type determination block 14, and the process proceeds to step S4.
In step S4, based on the refractive index transmitted from the refractive index determination block 13 and the data indicating the relationship between the refractive index transmitted from the storage block 11 and the oil type, the oil type determination block 14 determines the oil type (pipe 5). The type of oil in the oil is determined, and the determined oil type is transmitted to the alarm determination block 15. Then, the process proceeds to step S5.

In step S5, the oil type determined in the oil type determination block 14 by the warning determination block 15 and the oil type (in the pipe line 5) transmitted from the oil type transmission means 16 of the control device 9 via the signal line SL2. Compare the type of oil that should exist.
If the oil types match (step S5 is “YES”), it is determined that the oil type in the pipeline 5 is correct (normal), and the process proceeds to step S7.
If the oil types are different ("NO" at step S5), it is determined that the type of oil to be supplied is incorrect, and the process proceeds to step S6. In step S6, a signal that “the oil type is different” is transmitted to the alarm means 17 and the stop means 18 of the control device 9 via the signal line SL3, an alarm is issued, and the refueling operation is stopped. Ensure safety. Thereby, it is possible to prevent erroneous oil injection and erroneous oil supply.
In step S7 (when step S5 is “YES”), it is determined whether to continue or end the control for determining whether the oil type is correct or incorrect. When the control is to be ended (step S7 is “YES”), the control is ended as it is. When the control is continued (step S7 is “NO”), step S1 and subsequent steps are repeated.

Next, an installation example of the detection device 1 according to the first embodiment will be described.
FIG. 5 shows an installation example for preventing an accident (so-called “contamination”) that unloads oils of different oil types when unloading from the tank truck 90 to the oil storage tank 22.
In a filling station generally indicated by reference numeral 21, oil is supplied to the oil storage tank 22 by connecting the unloading pipe 32 of the tank truck 31 to the oil supply pipe 23. If the connection between the unloading pipe 32 and the oil supply pipe 23 is wrong, the wrong oil type will be supplied to the oil storage tank 22.

In FIG. 5, if the detection device 1 (see FIGS. 1 to 4) is provided in each oil supply pipe 23, oil different from the oil type to be supplied to each oil storage tank 22 enters the oil supply pipe 23. This is notified to the control device 9 (see FIG. 1) of the oil supply device (not shown), and the oiling operation can be stopped to ensure safety.
Thereby, an accident (so-called “contamination”) that unloads oil of different oil types to the oil storage tank 22 in the gas station 21 can be prevented.

The detection device of the present invention may be incorporated in equipment in the fueling device 25 of the fueling station 21, such as a pump unit 27 or a flow meter (not shown).
FIG. 6 shows an example in which the detection device 1 is incorporated in the pump unit 27, and positions where the detection device 1 is incorporated are indicated by reference numerals P1 and P2.
In FIG. 6, reference numeral P <b> 1 is a position in the vicinity of the inlet portion of the gas-liquid separation cyclone 100, which is a position perpendicular to the paper surface of FIG. 6 and away from the viewer.
Further, the position P2 is a position in the vicinity of the pump discharge port 51, and is a position on the viewer side in a direction perpendicular to the paper surface of FIG.

In FIG. 6, when the detector 1 is provided at any of the positions P <b> 1 and P <b> 2 of the pump unit 27 and oil different from the oil type to be supplied from the oil supply nozzle 30 flows, the control device 9 for oil supply is notified. .
As a result, an alarm is generated in the above-described manner, and the refueling operation is stopped, so that an accident caused by supplying wrong oil is prevented in advance.

Next, a second embodiment of the present invention will be described based on FIGS.
In the first embodiment described above, the oil type in the pipe line 5 is determined. In the second embodiment, in addition to the oil type determination, water, air, or the like (so-called “foreign matter”) is mixed. The rate can be determined.
The detection apparatus 1A described in FIG. 7 has the same configuration as the detection apparatus 1 described in FIG. 1. In FIG. 7, the same reference numerals as those in FIG. It is attached. Therefore, the description of the same configuration as in FIG. 1 is omitted.
Also in the second embodiment, oil type discrimination can be performed. About the structure and effect for oil type discrimination | determination, since it is the same as that of having demonstrated in FIGS. 1-4, duplication description is abbreviate | omitted.

In FIG. 7, the laser light LX irradiated from the optical fiber 4 of the irradiation device 2 is a boundary between the optical fiber 4 and the conduit 5, a boundary between the conduit 5 and the oil 10 in the conduit 5, and the oil 10 and the light reception. The device 6 is installed, refracted at the boundary with the pipe line 5, and irradiated to the light receiving device 6.
When water or air (so-called “foreign matter”) is mixed in the oil in the pipeline 5, the foreign matter is mixed as fine particles P in the oil in the pipeline 5. When the laser beam LX irradiated in the oil hits the particle P, the laser beam LX is reflected, and the amount of the laser beam LX reaching the light receiving device 6 is reduced.
Since there is a correlation between the amount of laser light LX reaching the light receiving device 6 and the number of particles P in the oil, if the amount of laser light LX reaching the light receiving device 6 is determined, foreign matter exists in the oil. The ratio, that is, the mixing ratio of water or air can be determined.
Determination of the contamination rate of foreign matters (water, air, etc.) by such a mechanism is performed by the control unit indicated by reference numeral 8A in FIGS.

  Here, it is known that the amount of reflected light of the laser beam LX is constant when the foreign matter is water, but the amount of reflected light varies when the foreign matter is air. Accordingly, the foreign matter in oil is water if the amount of fluctuation of the amount of received laser light LX reaching the light receiving device 6 is small, and the foreign matter in oil is large if the amount of fluctuation of the received light amount per unit time is large. It can be determined that it is air.

Next, the control unit 8A in the second embodiment will be described with reference to FIG.
In FIG. 8, the control unit 8A has a storage block 41, a received light amount calculation block 42, a mixing rate calculation block 43, a fluctuation amount calculation block 44, a timer 45, a comparison block 46, and an alarm determination block 47.
The control unit 8A is configured to be able to exchange signals or information with the control device 9 of the entire fueling device.

The storage block 41 of the control unit 8 stores the relationship between the amount of received light and the foreign matter (water, air) mixing rate, the threshold value of the amount of fluctuation of the received light amount per unit time (the unit time of the received light amount when the foreign matter is water). Threshold value that distinguishes the amount of fluctuation per unit of time and the amount of fluctuation per unit time of the amount of light received when the foreign matter is air), the threshold value for foreign matter contamination alarm, the threshold value for refueling stop, etc. .
Data on the relationship between the amount of received light and the contamination rate (data such as charts and equations) is transmitted to the contamination rate calculation block 43 via the signal line SL6.
The threshold value data of the fluctuation amount per unit time of the received light amount is transmitted to the comparison block 46 via the signal line SL7.
The data of the foreign matter mixing alarm threshold value and the refueling stop threshold value is transmitted to the alarm determination block 47 via the signal line SL8.

The received light amount calculation block 42 calculates the received light amount (the amount of laser light LX received by the light receiving device 6) from the detection signal (received signal) of the light receiving device 6 received via the signal line SL1, and mixes the calculated received light amount. It has a function of transmitting to the rate calculation block 43 and the fluctuation amount calculation block 44 of the received light amount per unit time.
The mixing rate calculation block 43 is based on the received light amount transmitted from the received light amount calculation block 42 and the data indicating the relationship between the received light amount transmitted from the storage block 41 and the mixing rate, and the mixing rate of foreign matter (water, air). And the function of transmitting the calculated mixing rate to the alarm determination block 47 is transmitted.

The fluctuation amount calculation block 44 of the received light amount per unit time is calculated based on the timing signal of the timer 45 and the received light amount of the light receiving device 6 transmitted from the received light amount calculation block 42 (hereinafter referred to as the fluctuation amount per unit time). (Described as “variation amount”) and the calculated variation amount is transmitted to the comparison block 46.
The comparison block 46 determines whether the foreign matter is water or air based on the fluctuation amount transmitted from the fluctuation amount calculation block 44 and the threshold value of the fluctuation amount per unit time of the received light amount transmitted from the storage block 41. It has a function of determining whether or not there is and transmitting the determination result to the alarm determination block 47.

The alarm determination block 47 includes the comparison result of the comparison block 46, the foreign matter contamination rate transmitted from the contamination rate calculation block 43, the foreign matter contamination alarm threshold value and the refueling stop threshold value transmitted from the storage block 41. Based on this, it has a function of determining whether or not the foreign matter contamination rate is a level that requires an alarm and whether or not the foreign matter contamination rate is a level that requires a refueling stop.
At the same time, the alarm determination block 47 transmits a signal indicating that an alarm should be given to the alarm means 17 of the control device 9 via the signal line SL3 when the foreign matter contamination rate is at a level that requires an alarm, and stops refueling. In the case where the level is required, a signal indicating that refueling should be stopped is transmitted to the stop means 18 of the control device 9 via the signal line SL3.

Next, based on FIG. 9, the control regarding the foreign material mixing rate in 2nd Embodiment is demonstrated.
In step S11 of FIG. 9, whether or not the laser beam LX emitted from the irradiation device 2 is input to the light receiving device 6 and a light reception signal is input from the light receiving device 6 to the control unit 8 via the signal line SL1 and read. Judging. If the light receiving device 6 receives the laser beam LX and a light reception signal is input to the control unit 8 (step S11 is “YES”), the process proceeds to step S12.
In step S 13, the received light amount is calculated by the received light amount calculation block 42, and the calculated received light amount is transmitted to the mixing rate calculation block 43.

In the next step S13, based on the received light amount calculated in the received light amount calculation block 42 and the data indicating the relationship between the received light amount and the mixing rate (data transmitted from the storage block 41), the mixing rate calculating block 43 The foreign matter contamination rate is calculated, and the calculated foreign matter contamination rate is transmitted to the alarm determination block 47. Then, the process proceeds to step S14.
In step S14, the fluctuation amount calculation unit 44 of the received light amount calculates the fluctuation amount (per received unit time) of the received light amount based on the timing signal of the timer 45 and the received light amount obtained by the received light amount calculation block. Then, the calculated fluctuation amount is transmitted to the comparison block 46.

In the next step S15, in the comparison block 46, the fluctuation amount obtained by the fluctuation amount calculation block 44 per short time of the received light amount and the threshold value of the fluctuation amount transmitted from the storage block 41 (when the foreign matter is water) The amount of fluctuation of the received light amount per unit time is compared with a threshold value that classifies the amount of fluctuation of the received light amount per unit time when the foreign object is air.
If the fluctuation amount is equal to or greater than the threshold value (“YES” in step S15), the foreign matter is determined to be air (step S16), and the foreign matter mixing rate calculated in step S13 is determined as the air mixing rate. Then, the process proceeds to step S18.
On the other hand, when the fluctuation amount is smaller than the threshold (step S15 is “NO”), the foreign matter is determined to be water, and the foreign matter mixing rate calculated in step S13 is determined as the water mixing rate. Then, the process proceeds to step S18.

In step S18, in the alarm determination block 47, the foreign matter contamination rate transmitted from the contamination rate calculation block 43 is compared with the foreign matter contamination alarm threshold value and the refueling stop threshold value transmitted from the storage block 41.
If the foreign matter contamination rate is smaller than the alarm threshold (step 18 is “NO”), the water and air contamination rate will not cause knocking or engine failure due to poor combustion, resulting in a problem of weighing accuracy. It is a level without fear, and it is judged that there is no problem. Then, the process proceeds to step S22, and when the control is to be continued (step S22 is “NO”), the process from step S11 is repeated. If the control is not continued, the process ends (step S22 is “YES”).

If the foreign matter contamination rate is equal to or higher than the alarm threshold value in step S18 (step S18 is “YES”), it is determined that either “alarm” or “fuel supply stop” is necessary, and the process proceeds to step S19.
In step S19, the alarm determination block 47 compares the foreign matter mixing rate with the threshold value for stopping fueling. If the foreign matter contamination rate is smaller than the threshold for stopping refueling ("NO" in step S19), it is determined that the foreign matter contamination rate has not reached a level enough to stop refueling, and an alarm is issued. Then, an alarm signal is transmitted to the alarm means 17 (step S21).
If the foreign matter contamination rate is equal to or higher than the threshold for stopping fueling ("YES" in step S19), it is determined that the foreign matter contamination rate is not at a level that requires a warning, but at a level at which fueling must be stopped. Then, a refueling stop signal is sent to the refueling stop means 18 (step S20).

The detection device 1 according to the second embodiment can be provided not only in the pipe line 5 but also at the positions P1 and P2 shown in FIG. However, since air is separated from the oil by the gas-liquid separation cyclone 100 at the position P2, it is not necessary to determine whether the foreign matter is water or air.
Therefore, when the detection device 1A is provided at the position P2, the control unit 8A does not need the fluctuation amount calculation block 44, the timer 45, and the comparison block 46 of the received light amount per unit time, and does not need steps S14 to S17. It is.

Configurations and operational effects other than those described above in the second embodiment are the same as those in the first embodiment.
The second embodiment can be combined with the first embodiment.

  It should be noted that the illustrated embodiment is merely an example, and is not a description of the purpose of limiting the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1, 1A, 1B, 1C ... Detection apparatus 2 ... Irradiation apparatus 3 ... Laser light source 4 ... Optical fiber 5 ... Pipe line 6 ... Light receiving device 7a, 7b ... Light receiving element 8 ... Control unit 9, 9A, 9B ... Control device 10 ... Oil 11 ... Storage block 12 ... Light receiving position determination block 13 ... Refractive index determination block 14 ... Oil type determination Block 15 ... Alarm determination block 16 ... Oil type transmission means 17 ... Alarm means 18 ... Stop means 21 ... Gas station 22 ... Oil storage tank 23 ... Oil filling pipe 24 ... Box 25 ... Oil supply device 26 ... Oil supply pipe 27 ... Pump unit 28 ... Flow meter 29 ... Oil supply hose 30 ... Oil supply nozzle 31 ... Tank truck 32 ... Unloading pipe 41 ... Storage block 42 ... Received light amount calculation block 43・ Mixing rate calculation block 44... Fluctuation amount calculation block 45 of received light amount per unit time... Timer 46... Comparison block 47 .. alarm determination block LX .. laser light SL1, SL2, SL3, SL4, SL5, SL6, SL7, SL8 ... Signal line P ... Particle

Claims (4)

  A detection device comprising: an irradiating device that irradiates light that does not diffuse; and a light receiving device that receives light that does not diffuse.   The detection device according to claim 1, further comprising a control unit, wherein the control unit has a function of determining an oil type from a position where the light receiving device receives light that is not diffused.   The detection device according to claim 2, wherein the control unit has a function of determining a mixing rate of foreign matters mixed in oil in an oil supply system from an amount of light received by light that is not diffused by the light receiving device.   The detection device according to claim 3, wherein the control unit has a function of determining the type of foreign matter from a fluctuation amount per unit time received by the light receiving device.

Images