KR100928067B1 - Lubricator idle detection algorithm and device - Google Patents

Abstract

The present invention relates to a fueling device for a gas station, and more particularly, to a fueling device for determining and treating a state in which only gas is supplied without fuel injection when fueling is performed in a state without oil in a gas storage tank.

To this end, the present invention

A motor, a tank for storing fluid, a pump connected with the motor to receive power from the motor, a pump for drawing fluid from the tank, a flow meter for measuring the amount of fluid from the pump, and a circuit for measuring the amount of rotation of the flow meter. In a well-known oiling device consisting of a whole quantity detector,

The motor may further include a current detector capable of sensing a current input to the motor.

Lubricator, Lubricator, Idle, Idle Detection, Current Detector, Rotation Detector, Liquid, Gas

Description

Lubricator idle detection algorithm and device {Gasoline Dispenser with Sensing Vacant Rotation}

The present invention relates to a lubricator of a gas station, and more particularly, to a lubricator for determining and treating a state in which only gas is supplied without fuel injection when lubricated in a state without oil in a gas storage tank.

The lubricator is a device for injecting oil into a car or the like. In general, a method for moving a fluid such as oil in a gas station is as follows.

Figure 1 schematically shows the principle of a commonly used lubricator, the lubricator is a motor 10 that provides power for moving the fluid, a pump 20 that plays a direct role in generating the flow of the fluid, gasoline (B) a storage tank 30 storing a defined fluid such as diesel oil or water (hereinafter referred to as a 'fluid'), a flow meter 40 for measuring the flow of the fluid, a pressure detector 50, and a rotation amount detector 60; Consists of

The motor 10 is a device for driving the pump 20 because it is connected to the pump 20 and the belt 15 in the lubrication device, the pump 20 is a flow meter 40 for measuring the amount of fluid moving It is a device that supplies constant fluid so that accurate measurements can be made.

The storage tank 30 is a space for storing the defined fluid in the lubricator, and the flow meter 40 measures the flow of the fluid in the lubricator.

The pressure detector 50 is mounted on a specific part of the pump 20 to measure the pressure inside the pump 20. In general, the pressure inside the pump 20 is different depending on whether the fluid moves or the gas moves in the pipe. Therefore, it is possible to determine the oiling state of the lubricator by monitoring and measuring the pressure value of the pump 20.

The rotation amount detector 60 is attached to the flow meter, and the rotation amount detector 60 is a device for monitoring the rotation amount of the flow meter.

The pressure detector 50 described above is generally composed of a cylinder 52 and a contact switch 54. When the fluid and gas discrimination method using the pressure detector is described in more detail with reference to [FIG. 2],

Basically, as mentioned above, the pressure when the fluid inside the pump 20 is different from the pressure when the gas is filled with gas enables the determination of the fluid gas.

In addition, when the fluid is dropped into the pump 20 and filled with gas, bubbles are generated, and the cylinder 52 of the pressure detector is pushed out by the bubbles. At this time, the cylinder is moved at a predetermined interval so that the contact switch 54 located outside the cylinder 52 is in contact, and the contact switch 54 represents the movement state as an electric signal.

When the fluid is moved by the driving of the pump 20 as described above, it is possible to determine whether the contents being lubricated at the time of oiling are fluid or gas by using the values calculated through the above method.

However, the method of determining the contents to be lubricated using the pressure detector 60 in the pump 20 constituting the lubrication device as described above has the following problems.

The pressure is measured by the cylinder 52 of the pressure detector being pushed out by the bubble generated when the fluid is discharged and the gas is filled in the pump 20, but the amount of deviation is very large according to the external temperature and the pressure condition. It is inconvenient to adjust the position of the cylinder differently according to the state, and the time that the bubble is generated by changing from the fluid state to the gas state may take at least 3 minutes to 10 minutes or more depending on external conditions.

And in order to install a pressure detector inside the pump, there is a hassle to drill a connection hole of a certain size.

That is, for the above reasons, it takes a lot of time to detect the state of the inside of the pump is changed from the fluid to the gas, and incorrect information may occur according to mechanical structural changes such as cylinder positioning.

In this case, if the detection time requires more than 3 minutes, the gas station is usually lubricated once, but since the fueling is completed within 1 minute and 30 seconds, it is impossible to check the gas state value and thus it is impossible to measure the correct oil supply. There is a problem.

As to solve the above problems,

An object of the present invention is to distinguish between the fluid and gas present in the lubrication device in a faster time at the time of lubrication, to obtain more accurate lubrication information without changing the structure of the device, and to The present invention is to implement a device that distinguishes gas and measures only fluid supply to ensure accurate oil supply.

As to solve the above problems,

A motor, a tank for storing fluid, a pump connected with the motor to receive power from the motor, a pump for drawing fluid from the tank, a flow meter for measuring the amount of fluid from the pump, and a circuit for measuring the amount of rotation of the flow meter. In a well-known oiling device consisting of a whole quantity detector,

The motor is characterized by further comprising a current detector that can detect the current input to the motor.

From the structural features of the present invention described above,

The oiling apparatus according to the present invention distinguishes the fluid and gas present in the oiling apparatus within a shorter time at the time of oiling, obtains more accurate oiling information without changing the structure of the oiling apparatus, and By distinguishing the fluid and the gas has the effect of measuring only that the fluid is lubricated to achieve accurate lubrication.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

In this embodiment, the fueling device is a motor 110, a pump 120, a storage tank 130, a flow meter 140, a rotation amount detector 160, a current detector 150 and The control unit 200 is configured. (The arrows shown in FIG. 3 indicate the fluid flow direction.)

The motor 110 provides power necessary to supply a fluid to the flow meter 140 under a constant pressure of a pump to be described later, and mostly uses AC220V as a motor driving power source.

Pump 120 is a device that enables the flow of the fluid in the lubrication device by the pressure action, the flow meter 140 for measuring the amount of the moving fluid to supply the fluid constantly so that the accurate measurement, the fluid movement piping It is connected to the storage tank 130 through 170a. The pump is equipped with a belt 115, one side of which is connected to the motor 110, is driven by receiving power from the motor 110.

Storage tank 130 is a storage device for storing a fluid, such as oil, it is preferable to select the material of the storage tank according to the nature of the fluid to be stored in order to store the fluid safely and without alteration during the storage process.

Flow meter 140 is a device for measuring the flow of the fluid in the fueling device, the pump 120 is located in the pipe (170b) for the fluid drawn from the storage tank 130 to the oiler 180.

A specific amount of the flow meter 140 is equipped with a rotation amount detector 160. This rotation amount detector 160 is a device for monitoring the rotation amount of the flow meter, it is possible to accurately calculate the amount of fluid to be moved to the pipe by checking the state of the flow meter.

Next, the current detector 150 will be described.

The current detector 150 is a device for measuring a current value (hereinafter, referred to as a 'motor driving current value') input to the motor 110 that transmits power required to drive a fueling device.

In general, there is a difference between a motor driving current value for driving the pump 120 when the heavier fluid moves and a motor driving current value for driving the pump when the lighter gas moves through the pipe.

The difference is that the motor drive current value when the fluid flows through the pipe is twice or more than the motor drive current value when the gas flows.

Next, the control unit 200 will be described.

The controller 200 includes a microprocessor 230, a counter 210, an ADC 220, a motor controller 240, and an indicator 250, which are illustrated in FIG. 4.

Referring to Figure 4,

The counter 210 is a device for temporarily storing the current rotation data value by storing the pulse value output from the rotation amount detector 160 in the fueling device.

In addition, the ADC 220 is a converter that changes the size of the analog input value into a digital value. The current value of the motor input from the current detector is measured and transmitted to the microprocessor 230 to be described later as a digital value.

The microprocessor 230 is a main control device that calculates and determines various pieces of information input from the outside. At this time, all collected information is temporarily stored in a memory, and the microprocessor 230 controls this again.

The motor controller 240 controls the motor by receiving a command from the microprocessor 230 to control whether the motor is driven or stopped by controlling the power source AC220 or AC110 that drives the motor.

The indicator 250 is a device for displaying the current state value so that the microprocessor 230 can determine the current state and confirm the state.

In addition, the process of inputting the microprocessor through the current detector 150 and the rotation amount detector 160 will be described.

The current signal output from the current detector is transformed into a current (pressure) that is easy to measure using a current (pressure) amplifier circuit, and the output state value is input to the filter to remove noise and input to the microprocessor. do.

The rotation amount data value is set in real time in the rotation data storage place and the rotation speed value of the data is obtained through the rotation speed calculation.

The gas determination process of the present invention consisting of the above components will be described with reference to FIGS. 5 and 6 as an embodiment.

FIG. 5 illustrates a process of determining using only the current detector 150, and FIG. 6 illustrates a process of determining using the current detector 150 and the rotation amount detector 160.

Referring to FIG. 5 as a first embodiment,

In order to judge, first, by measuring the motor driving current value when the gas is injected into the microprocessor 230 of the controller 200 or when the fluid is injected, it is possible to distinguish whether the contents being lubricated are fluid-related delays. Input of the gas judgment current reference value, which is the reference current value, should be preceded. The gas judgment gas current value refers to a current value that serves as a reference for distinguishing whether the contents to be oiled are fluid delays.

The gas judgment current reference value input is not performed every time of lubrication, but only one input.

The determination process first obtains a current value input to the motor 110 during operation of the lubricator through the current detector 150 and checks the current value 410.

Next, the step 420 is performed to compare the derived current value with the gas determination current value. If the current value is greater than or equal to the gas determination current value, it is determined that the fluid is finished. If the current value is less than or equal to the gas determination current reference value, the determination is made to be gas, and the motor is controlled 450.

A second embodiment will be described with reference to FIG. 6.

In FIG. 6, what is to be preceded in order to make a decision is not only to input the gas determination current reference value to the microprocessor 230 as in FIG. 5, but also to input the gas determination reference variation range.

The gas judgment reference variation range refers to a general range of the speed change amount of the fluid as a reference value when determining whether the gas is a gas.

The determination process first obtains a current value input to the motor 110 during operation of the lubricator through the current detector 150 and checks the current value 410.

Next, the step 420 is performed to compare the derived current value with the gas determination current value.

If the current value is greater than or equal to the gas determination current value, it is determined to be a fluid. When the current value is lower than the gas determination reference current value, the determination is made by a predetermined number of times. The measurement is repeated 440.

After the step 440 of repeatedly measuring the amount of rotational speed fluctuating for a predetermined time by a predetermined number of times, the value of the variation in the rotational speed of each measured cycle is greater than or equal to the gas judgment standard variation range. Only when the step 450 is controlled to stop the operation of the motor.

This is to use the characteristics of the fluid and gas that the flow of the fluid is constant so that the change in the rotational speed does not occur largely, and in the case of gas, the flow is not constant.

Example 1 and Example 2 demonstrated above are further demonstrated.

The reason for checking the current value derived from the current detector first is that a faster and clearer judgment can be made.

For example, in the case of gas determination based on the amount of rotation, the amount of rotation can be easily changed not only when the gas is oiled but also by the gas that is occasionally generated in the fluid, but in the case of checking the current value through the current detector, Since the current value does not change significantly when the fluid is lubricated, it is preferable to determine it first.

In addition, it is preferable that the determination using the rotation detector be made several times for the same reason as described above.

In addition, it is possible to determine whether or not the fluid gas by using only the current value as in Example 1 for the above and further reasons, but the same method as in Example 2 may be used for a more reliable determination.

Lubrication air rotation sensing device composed of such a configuration was able to obtain a result that can be determined within 500msec as a result of the experiment, unlike the conventional time required more than 10 seconds.

Although a preferred embodiment of the present invention has been described above, the technical idea of the present invention is not limited to the above-described preferred embodiment, and is implemented as various oiling apparatuses within the scope not departing from the technical idea of the present invention specified in the claims. Can be.

1-Schematic diagram of a conventional oiling device

2-Schematic diagram of a pressure detector mounted in a conventional oiling device

Figure 3-embodiment of the lubricator idle detection device according to the invention

4-Embodiment of a system configuration for determining the inside of the pump according to the present invention

5-Embodiment of a determination unit input process according to the present invention

6-flowchart of the determination process of the determination unit according to the present invention

<Description of Signs of Major Parts of Drawings>

110: motor 115: belt

120: pump 130: storage tank

140: flow meter 150: current detector

160: rotation amount detector

Claims (4)

delete Motor to run the lubrication system A tank for storing fluid A pump connected to the motor and drawing fluid from the tank; Including a flow meter for measuring the amount of content from the pump, It is provided with a current detector for measuring the current value input to the motor, Is connected to the flow meter is provided with a rotation amount detector for measuring the amount of rotation of the flow meter, When the current value obtained from the current detector is lower than the gas determination reference current value, the amount of rotation during which the rotation speed calculated from the rotation amount detector fluctuates for a predetermined time is repeatedly measured by a predetermined number of times to determine the rotation speed of each of the measured times. Oil gas revolution detection device, characterized in that the control unit for stopping the operation of the motor only when the value of the variation amount is greater than the gas determination reference variation range. delete a) checking the current value obtained from the current detector; b) comparing the current value with a gas determination reference current value; c) repeatedly measuring the amount by which the rotational speed calculated from the rotation amount detector fluctuates for a predetermined time only when the current value is lower than the gas determination reference current value by a predetermined number of times; and d) controlling the operation of the motor to be stopped only when the value of the variation in the rotational speed of each cycle is equal to or greater than the gas determination reference variation range.

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