KR102400123B1 - Dispenser and method for precision calculating liquid level in syringe - Google Patents

Abstract

The present invention provides a first proportional control valve connected through a first pipe and a compressed gas source for supplying a gas for discharging a liquid filled in a syringe (Syringe); One side is connected to the first proportional control valve and the second pipe, and the other side is connected to the syringe and the third pipe, and the gas having the pressure adjusted through the first proportional control valve is supplied to the syringe. a discharge valve to determine whether or not; a first pressure sensor installed on one side of a specific pipe among the first to third pipes to sense the pressure of the gas passing through the installation point; a second pressure sensor installed on one side of a specific pipe between the installation point of the first pressure sensor and the compressed gas source among the first to third pipes to sense the pressure of the gas passing through the installation point; And based on the first pressure integral value and the second pressure integral value using the pressure values for each time detected by the first pressure sensor and the second pressure sensor, the estimated value of the remaining amount of liquid remaining in the syringe for each discharge time is corrected and calculated. A dispenser having a micro-quantitative discharge function according to the remaining amount of liquid in a syringe, including a control module for controlling the opening and closing state of the discharge valve according to the estimated remaining amount of liquid, and a method for precisely calculating the remaining amount of liquid in a syringe through the dispenser .

Description

A dispenser and a method of precisely calculating the remaining amount of liquid in a syringe through it {DISPENSER AND METHOD FOR PRECISION CALCULATING LIQUID LEVEL IN SYRINGE}

The present invention relates to a dispenser having a function of precisely calculating the remaining amount of liquid in a syringe and a method for accurately calculating the remaining amount of liquid in a syringe through such a dispenser.

A pneumatic dispenser used in the manufacturing process of various electronic devices including semiconductors is an ultra-precise dispensing device that dispenses a very small amount of liquid in a fixed quantity.

As the structure of the substrate, which is the target of the discharging operation through the dispenser, is gradually integrated and refined according to technological development, the volume of liquid required for dispensing is also gradually becoming finer. How accurately it can deliver will determine the dispenser's performance.

Accordingly, in recent years, many researches and technological developments have been made to enable precise control of the micro-quantitative discharge in response to the reduced liquid discharge demand.

Among the various technologies related to the dispenser's micro-quantitative dispensing, as the dispensing operation progresses, the liquid filled in the syringe gradually decreases and the remaining amount of liquid changes. There is a continuous demand for the development of a technology for controlling the discharging operation condition to be changed according to the remaining amount of liquid.

In this regard, in the prior art document on the prior art prepared to accurately grasp the remaining amount of liquid in a syringe to enable precise control of liquid quantitative discharge, Republic of Korea Patent Publication No. 10-0794641 "Method for detecting remaining amount of liquid in a dispenser" (hereinafter, referred to as 'prior art').

However, in the case of technologies prepared to acquire information on the remaining amount of liquid in a syringe, which is the basis for liquid quantitative discharge control, in the process of dispensing through a dispenser, including prior art, before dispensing or in the middle of dispensing There was a problem in that it was required to perform a task to determine the remaining amount of liquid in a separate syringe, impairing the work speed and efficiency.

Moreover, in the case of techniques prepared to acquire information on the remaining amount of liquid in a syringe, which is the basis for liquid quantitative discharge control in the process of dispensing through an existing dispenser, including the prior art, information on the remaining amount of liquid in the syringe An error occurs in that the numerical values of various information values necessary for deduction differ from the actual values due to environmental factors such as temperature and humidity inside or outside the dispenser, or the device's own factors such as the number of times the dispenser is dispensing. There was a problem in that functional reliability was lowered or was not constant as it affected not only the result value for the remaining amount of liquid, but also the micro-quantitative discharge function itself to perform control based thereon.

The present invention was created to solve the above problems, and an object of the present invention is to provide a more accurate syringe The goal is to provide a technology that can continuously maintain the reliability of the micro-quantitative discharge function through the dispenser at a constant and high level by deriving information on the remaining amount of liquid within it.

In order to achieve the above object, the dispenser having a micro-quantitative discharge function according to the remaining amount of liquid in a syringe of the present invention is a compressed gas source that supplies gas for discharging the liquid filled in a syringe and a first pipe through a first proportional control valve connected; One side is connected to the first proportional control valve and the second pipe, and the other side is connected to the syringe and the third pipe, and the gas having the pressure adjusted through the first proportional control valve is supplied to the syringe. a discharge valve to determine whether or not; a first pressure sensor installed on one side of a specific pipe among the first to third pipes to sense the pressure of the gas passing through the installation point; a second pressure sensor installed on one side of a specific pipe between the installation point of the first pressure sensor and the compressed gas source among the first to third pipes to sense the pressure of the gas passing through the installation point; And based on the first pressure integral value and the second pressure integral value using the pressure values for each time detected by the first pressure sensor and the second pressure sensor, the estimated value of the remaining amount of liquid remaining in the syringe for each discharge time is corrected and calculated. and a control module for controlling the opening/closing state of the discharge valve according to the estimated remaining liquid amount, wherein the control module is configured to control the second pressure sensor to be normally calculated according to the preset gas supply pressure supplied from the compressed gas source. By the ratio of the difference between the normal pressure integral reference value indicating the reference expectation for the second pressure integral value using the pressure value for each time sensed through the 1 The first pressure integral value using the pressure value for each time sensed through the pressure sensor is compensated, and the first pressure integral value is compensated and the discharge cycle is performed based on the preset gas supply pressure supplied from the compressed gas source. Calculate the estimated amount of remaining liquid in the syringe.

Here, the first pressure sensor may be installed between the discharge valve on the third pipe and the syringe to sense the pressure of the gas toward the syringe.

In addition, the second pressure sensor may be installed between the first proportional control valve and the discharge valve on the second pipe to sense the pressure of the gas toward the discharge valve.

According to implementation, the second pressure sensor may be installed between the compressed gas source on the first pipe and the first proportional control valve to sense the pressure of the gas directed toward the first proportional control valve.

More specifically, the dispenser may further include a first air tank having a predetermined surge capacity and disposed on the second pipe, and the second pressure sensor is the first air tank on the second pipe. 1 It is installed between the air tank and the discharge valve to sense the pressure of the gas directed toward the discharge valve.

The control module may include: an information receiving unit configured to receive first detection information on a pressure value sensed by the first pressure sensor and second detection information on a pressure value detected by the second pressure sensor; a first pressure integral value calculating unit for calculating a first pressure integral value for the pressure sensed from the opening time of the discharge valve to a predetermined time based on the first detection information received through the information receiving unit; a second pressure integral value calculating unit for calculating a second pressure integral value for the pressure sensed from the opening time of the discharge valve to a predetermined time based on the second detection information received through the information receiving unit; Calculating a normal pressure integral reference value indicating a reference expected value for a second pressure integral value using the time-based pressure value sensed by the second pressure sensor to be normally calculated according to the gas supply pressure supplied from the preset compressed gas source Normal pressure integral reference value calculation unit; The first pressure integral calculated by the first pressure integral value calculator by the ratio of the difference between the normal pressure integral reference value calculated by the normal pressure integral reference value calculator and the second pressure integral value calculated by the second pressure integral value calculator a liquid residual amount calculating unit for calculating an estimated residual liquid amount in the syringe based on a first pressure integral correction value derived by compensating the value and a preset gas supply pressure supplied from the compressed gas source; and an operation control unit for controlling the opening and closing states of the first proportional control valve and the discharge valve, wherein the operation control unit controls the discharge valve according to a preset condition based on the estimated remaining liquid amount calculated by the remaining liquid amount calculating unit. You can adjust the opening duration.

Here, the operation control unit may increase the opening duration of the discharge valve in proportion to a decrease in the estimated remaining liquid amount calculated by the remaining liquid amount calculating unit.

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On the other hand, in order to achieve the above object, the method for precisely calculating the remaining amount of liquid in a syringe of the present invention is a first proportionality connected through a first pipe and a compressed gas source that supplies a gas for discharging the liquid filled in a syringe (Syringe) control valve; One side is connected to the first proportional control valve and the second pipe, and the other side is connected to the syringe and the third pipe, and the gas having the pressure adjusted through the first proportional control valve is supplied to the syringe. a discharge valve to determine whether or not; a first pressure sensor installed on one side of a specific pipe among the first to third pipes to sense the pressure of the gas passing through the installation point; a second pressure sensor installed on one side of a specific pipe between the installation point of the first pressure sensor and the compressed gas source among the first to third pipes to sense the pressure of the gas passing through the installation point; And based on the first pressure integral value and the second pressure integral value using the pressure values for each time detected by the first pressure sensor and the second pressure sensor, the estimated value of the remaining amount of liquid remaining in the syringe for each discharge time is corrected and calculated. In the method for precisely calculating the remaining amount of liquid in a syringe through a dispenser, comprising: a control module for controlling the opening/closing state of the discharge valve according to the estimated remaining amount of liquid, the operation in the control module according to the discharge operation signal input to the control module A step of controlling the opening and closing states of the first proportional control valve and the discharge valve by a control unit; Step B of receiving, by an information receiving unit in the control module, first detection information and second detection information for a pressure value sensed by the first pressure sensor and the second pressure sensor; C in which the first pressure integral value calculator in the control module calculates the first pressure integral value for the pressure sensed from the time when the discharge valve is opened to a predetermined time based on the first detection information received through the step B step; D in which a second pressure integral value calculation unit in the control module calculates a second pressure integral value for the pressure sensed from the time when the discharge valve is opened to a predetermined time based on the second detection information received through the step B step; A standard for the second integral pressure value using the pressure value for each time detected through the second pressure sensor to be normally calculated according to the gas supply pressure supplied from the compressed gas source preset by the normal pressure integral reference value calculation unit in the control module E step of calculating a normal pressure integration reference value representing the expected value; The residual liquid amount calculation unit in the control module compensates the first pressure integral value calculated in the C step by the ratio of the difference between the normal pressure integral reference value calculated in the E step and the second pressure integral calculated in the D step. F step of deriving a first pressure integral correction value by processing; a G step of calculating an estimated value of the remaining amount of liquid in the syringe based on the first pressure integral correction value derived through the F step and the preset gas supply pressure supplied from the compressed gas source; and an H step in which the operation controller adjusts the opening duration of the discharge valve according to a preset condition based on the estimated remaining liquid amount calculated through the G step.

Here, the H step may be a step in which the operation control unit increases the opening duration of the discharge valve in proportion to a decrease in the estimated remaining liquid amount calculated by the remaining liquid amount calculating unit.

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According to the present invention, there are the following effects.

First, it is possible to accurately estimate the level of the remaining amount of liquid in the syringe based on the integral value information for the pressure value for each time detected through the first pressure sensor installed in front of the discharge valve.

Second, based on a more accurate first pressure integral correction value, through correction that compensates the numerical value of the first pressure integral value by the ratio of the difference between the normal pressure integral reference value calculated for the second pressure sensor and the actual second pressure integral value By accurately estimating the level of the remaining amount of liquid in the syringe, the precise calculation of the remaining amount of liquid in the syringe can be accurately calculated without being affected by environmental factors such as temperature and humidity inside or outside the dispenser, or the device itself such as the number of times the dispenser is discharged. and can be performed consistently.

Third, using the calculated information on the remaining amount of liquid in the syringe, it is possible to exclude the influence of the change in the amount of remaining liquid in the syringe on the reliability of the micro-quantitative dispensing function by changing the opening duration of the discharge valve according to preset conditions. there is.

Fourth, even if the remaining amount of liquid in the syringe varies according to the repeated liquid discharge operation, it is possible to more precisely control the discharge of a small amount in response to the required amount of liquid discharged to a very small amount.

Fifth, it is possible to accurately estimate the level of the remaining amount of liquid in the syringe without being affected by environmental factors such as temperature and humidity inside or outside the dispenser, or by the device's own factors such as the number of times the dispenser is dispensing. The reliability of the function can also be provided with more accuracy and a higher level in any situation.

1 is a configuration diagram showing a pipe and valve connection structure of a dispenser according to the present invention.
2 is a block diagram showing a detailed configuration in the control module of the dispenser according to the present invention.
Figure 3 (a) relates to a graph showing the change of the pressure value detected through the first pressure sensor of the dispenser according to the present invention, versus time for each residual liquid level in the syringe, which changes according to the discharging operation of the dispenser.
3 (b) relates to a graph showing a change in the first pressure integral value using the time-based pressure value sensed by the first pressure sensor according to the change in the remaining amount of liquid in the syringe of the dispenser according to the present invention.
4 is an environmental factor such as temperature and humidity inside or outside the dispenser of the first pressure integral value using the pressure value for each time detected by the first pressure sensor of the dispenser according to the present invention, or the number of times of discharging operation of the dispenser. It is a graph to explain the effect of the results due to the factors of the device itself.
5 is an environmental factor such as temperature and humidity inside or outside the dispenser of the second pressure integral value using the pressure value for each time detected by the second pressure sensor of the dispenser according to the present invention, or the number of times of discharging operation of the dispenser. It is a graph to explain the effect of the results due to the factors of the device itself.
6 and 7 are a first pressure integral value using an hourly pressure value sensed by a first pressure sensor of the dispenser according to the present invention, and a second pressure integral value using an hourly pressure value detected by a second pressure sensor. It is a graph showing the change pattern during the continuous discharge test.
8 is a continuous discharge test in the case of performing a precise calculation of the remaining amount of liquid in a syringe through the dispenser according to the present invention, and then controlling the discharge operation conditions according to the level of the remaining liquid based on this and performing fine quantitative discharge This is a graph showing the results.

A preferred embodiment of the present invention will be described in more detail with reference to the accompanying drawings, but already known technical parts will be omitted or compressed for the sake of brevity of description.

1. Description of the dispenser configuration and piping structure

1, the dispenser 100 of the present invention is a plurality of air tanks 160 and 165 to discharge the liquid filled in the syringe (Syringe, S) using the gas supplied from the compressed gas source (A). ), a plurality of piping structures (111 to 117), a plurality of proportional control valves (120, 125), a plurality of valves (130, 170), a plurality of compression sensors (140, 145), and a control module (150). .

Through this, the dispenser 100 of the present invention is preferentially provided with a function of precisely calculating the remaining amount of liquid in a syringe, and in connection with this, it also has a function of controlling a fine amount of discharge according to the level of the remaining amount of liquid in the syringe.

First, the compressed gas source (A) is an external device connected to the dispenser 100 for micro-quantitative discharge, and generates a compressible gas and injects the gas into a syringe (S) with a pipe structure built in the dispenser 100 for micro-quantity discharge. to be supplied to the syringe (S) so that the pre-filled liquid is discharged at a constant pressure.

The first proportional control valve 120 is connected to the compressed gas source A for supplying gas for discharging the liquid filled in the syringe S and the first pipe 111 through the first pipe 111 .

Here, the first proportional control valve 120 is a regulator for controlling the gas that has been discharged and moved from the compressed gas source (A) to a preset pressure to discharge.

The opening state control according to whether the first proportional control valve 120 is opened or closed and the set pressure at the time of opening is controlled through the operation control unit 154 in the control module 150 to be described below.

One side of the discharge valve 130 is connected through the first proportional control valve 120 and the second pipe 112 , and the other side is connected through the syringe S and the third pipe 113 , the first proportional control It is a solenoid-type valve that determines whether or not to supply gas with a pressure adjusted through the valve 120 to the syringe (S).

Therefore, the discharge valve 130 is a configuration of a valve that determines whether to supply the syringe S of the gas having the pressure adjusted through the first proportional control valve 120 through opening and closing.

Here, a first air tank 160 having a predetermined surge capacity is installed between the first proportional control valve 120 and the discharge valve 130 on the second pipe 112 .

This first air tank 160 has a predetermined surge capacity, is generated from the compressed gas source (A) therein, and then is adjusted to a predetermined pressure through the first proportional control valve 120 to discharge and move the gas. It corresponds to a tank for buffer that can be filled.

The first pressure sensor 140 and the second pressure sensor 145 start with the compressed gas source (A), the first pipe 111 - the first proportional control valve 120 - the second pipe 112 - the discharge valve (130) - the third pipe (113) - a sensor installed at two points on one gas supply line leading to the syringe (S) so that it can be used to derive the integral value by measuring the time change of the pressure value at each point is the composition

Specifically, the first pressure sensor 140 is installed on one side of a specific pipe among the first pipe 111 to the third pipe 112 to sense the pressure of the gas passing through the installation point, and the second pressure sensor 145 . The first pressure sensor 140 is installed on one side of a specific pipe between the installation point of the first pressure sensor 140 and the compressed gas source (A) among the first pipe 111 to the third pipe 112, the installation point sense the pressure of the gas passing through it.

The first pressure sensor 140 and the second pressure sensor 145 have different installation points, so the level of the pressure value and the level of the pressure integral value based thereon are different from each other, but the change in the pressure value and the pressure integral value appear at the same or very similar level.

Therefore, the analysis of the change pattern of the second integral value based on the detection information obtained through the second pressure sensor 145 and the comparison with the reference integral value are the first results based on the detection information obtained through the first pressure sensor 140 . The same can be applied to the analysis of the change pattern of the pressure integral value and the comparison with the reference integral value, so that the precise calculation function can be performed through the correction of the estimated value of the remaining liquid remaining in the syringe (S).

More specifically, it is preferable that the first pressure sensor 140 is installed between the discharge valve 130 and the syringe S on the third pipe 113 to sense the pressure of the gas toward the syringe S.

In addition, the second pressure sensor 145 is installed between the first proportional control valve 120 and the discharge valve 130 on the second pipe 112 according to the implementation to measure the pressure of the gas toward the discharge valve 130 side. Various installations so as to detect or detect the pressure of the gas that is installed between the compressed gas source (A) on the first pipe (111) and the first proportional control valve (120) toward the first proportional control valve (120) side branch can be established.

Among them, most preferably, the second pressure sensor 145 detects the pressure of the gas toward the discharge valve 130 between the first air tank 160 and the discharge valve 130 on the second pipe 112 . can be installed to

The information sensed through the first pressure sensor 140 is transmitted to the information receiving unit 151 in the control module 150 to be described below, and through this, the control module 150 receives the syringe ( S) to check and control the state of the gas discharged and moved.

The information sensed through the second pressure sensor 145 is transmitted to the information receiving unit 151 in the control module 150 to be described below, and through this, the control module 150 operates the first proportional control valve 120 . Through the first air tank 160 of the gas adjusted to a predetermined pressure, the state in which the gas is discharged and moved to the discharge valve 130 is checked and controlled.

The second proportional control valve 125 has a fourth pipe 114 branched from the first pipe 111 connected to one side, and a sixth pipe ( The fifth pipe 115 from which 116 is branched is connected to the other side, and is a regulator that determines whether to maintain a vacuum through the fifth pipe 115 and the sixth pipe 116 .

Here, a second air tank 165 having a predetermined surge capacity between the second proportional control valve 125 on the fifth pipe 115 and the branch point of the fifth pipe 115 and the sixth pipe 116 . ) is installed.

Specifically, the gas moved to the fourth pipe 114 passes through the second proportional control valve 125 and is adjusted to the set pressure, and then the gas is stabilized through the second air tank 165. , the gas moved along the fifth pipe 115 to be evacuated and evacuated by the vacuum ejector maintains a more stable state.

The exhaust valve 170 is branched from the third pipe 113 and connected to one side of the seventh pipe 117 provided for rapid exhaust, and is a solenoid-type valve that determines whether to exhaust through the seventh pipe 117 .

The control module 170 is a syringe (S) for each discharge cycle based on the first pressure integral value and the second pressure integral value using the pressure values for each time detected through the first pressure sensor 140 and the second pressure sensor 145 . ) by correcting and calculating the estimated remaining amount of liquid, and controlling the opening/closing state of the discharge valve according to the calculated estimated remaining amount of liquid.

More specifically, the control module 170 integrates the second pressure using the pressure value for each time sensed through the second pressure sensor 145 to be normally calculated according to the gas supply pressure supplied from the preset compressed gas source A. A difference ratio between the normal pressure integral reference value indicating the reference expected value for the value and the second pressure integral value using the time-based pressure value detected by the actual second pressure sensor 145 is calculated.

After that, the control module 170 compensates the first pressure integral value using the timely pressure value sensed through the first pressure sensor 145 by the difference ratio between the normal pressure integral reference value and the second integral pressure value, and compensates Based on the processed first pressure integral value and the gas supply pressure supplied from the preset compressed gas source A, an estimated value of the remaining liquid amount in the syringe S for each discharge time is calculated.

To this end, the control module 170 includes the information receiving unit 151 , the first pressure integral value calculating unit 152 , the second pressure integral value calculating unit 153 , the normal pressure integral reference value calculating unit 154 , and the remaining liquid amount calculation unit. It includes a unit 155 and an operation control unit 156 .

Here, the information receiving unit 151 is configured to receive, in real time, the sensing information on the pressure value sensed through the first pressure sensor 140 and the second pressure sensor 145 according to a preset period, and record management.

Next, the first pressure integral value calculating unit 152 is configured for a predetermined time (depending on implementation, but preferably 1) from the opening time of the discharge valve 130 based on the first detection information received through the information receiving unit 151 . The first pressure integral value is calculated for the sensed pressure (until the discharge operation is completed or until a certain level is maintained after the rising pattern on the pressure graph).

Next, the second pressure integral value calculating unit 153 is configured for a predetermined time (depending on implementation, but preferably 1) from the opening time of the discharge valve 130 based on the second detection information received through the information receiving unit 151 . The second pressure integral value is calculated for the sensed pressure until the discharge operation is completed or until a certain level is maintained after the rising pattern on the pressure graph).

In addition, the normal pressure integral reference value calculation unit 154 uses the pressure value for each time detected through the second pressure sensor 145 to be calculated normally according to the gas supply pressure supplied from the preset compressed gas source A. Calculate the normal pressure integral reference value representing the reference expectation for the pressure integral value.

In addition, the residual liquid amount calculating unit 155 preferentially between the normal pressure integral reference value calculated through the normal pressure integral reference value calculating unit 154 and the second pressure integral value calculated through the second pressure integral value calculating unit 153 . Calculate the difference ratio.

After that, the liquid residual amount calculator 155 compensates the first pressure integral value calculated through the first pressure integral value calculator 151 by the ratio of the difference between the normal pressure integral reference value and the second pressure integral value. The estimated value of the remaining amount of liquid in the syringe S may be calculated based on the first pressure integral correction value and the preset gas supply pressure supplied from the compressed gas source A.

Finally, the operation control unit 156 controls the operation related to whether the first proportional control valve 120 , the second proportional control valve 125 , the discharge valve 130 , and the exhaust valve 170 are opened and closed or not. It is a configuration that performs control.

The operation control unit 156 adjusts the opening duration of the discharge valve 130 according to a preset condition based on the estimated remaining liquid amount calculated by the remaining liquid amount calculating unit 155 .

More specifically, the operation control unit 156 has a control method of increasing the opening duration of the discharge valve 130 in proportion to the decrease in the estimated remaining liquid amount calculated by the remaining liquid amount calculating unit 155 .

2. Description of the precise calculation of the remaining amount of liquid in the syringe of the dispenser

Hereinafter, through the above-described configurations, the precise calculation function of the remaining liquid amount in the syringe and the fine quantitative discharge control function according to the level of the liquid remaining in the dispenser 100 of the present invention related to the discharge operation will be described in more detail. .

When the discharge operation signal for starting the discharge operation is generated by the operator through a separate signal input means provided in the dispenser 100 and received by the control module 150, the gas supplied from the compressed gas source (A) is the first The pipe 111, the second pipe 112, and the third pipe 113 are moved along the movement path so that a predetermined level of pressure is applied to the syringe S so that the pre-filled liquid is discharged.

When a certain period of time has elapsed after the discharge operation, first, the exhaust valve 170 is opened to the seventh pipe 117, and then the first pipe 111, the second pipe 112, and the third pipe 113 are exhausted. ) to close the movement path and establish and maintain a vacuum state through vacuum exhaust through the fourth pipe 114, the fifth pipe 115, and the sixth pipe 116 to prevent the suction and spillage of the remaining liquid in the syringe (S). Anti-seek repeats a series of processes.

In this process, the remaining amount of liquid in the syringe (S) is gradually reduced. It can only be judged that the remaining amount of liquid is reduced, but it is necessary to know the exact remaining amount of liquid in the past. In the calculation, it is required to analyze the change pattern of the pressure integral value on the piping line moved for the discharge operation of the gas supplied from the compressed gas source (A).

In fact, looking at the change in the pressure level versus time detected through the first pressure sensor 140 as shown in FIG. Based on this, as shown in Fig. 3(b), when looking at the change pattern between the first pressure integral value using the change in the pressure value for each time detected through the first pressure sensor 140 compared to the remaining liquid amount, a proportional pattern of a certain slope is shown. can be known

Through this, it can be seen that if the first pressure integral value is accurately calculated using the change in the pressure value for each time sensed by the first pressure sensor 140, the level of the remaining amount of liquid in the syringe (S) can also be accurately identified. .

Therefore, in order to calculate the remaining amount of liquid in the syringe (S), the dispenser 100 of the present invention is a first pressure integral value using the pressure value for each time detected by the first pressure sensor 140 and the second pressure sensor 145 . and a second integral pressure value.

However, there was a problem in that this pressure integral value was influenced by environmental factors such as temperature and humidity inside or outside the dispenser, or the device itself, such as the number of times the dispenser was discharging, resulting in a difference from the actual value, leading to errors.

These problems do not stop there, and as a result, the reliability of the micro-quantitative discharge control function according to the level of the remaining amount of liquid in the syringe is affected. became more important.

In fact, while the level of gas supply pressure supplied from the compressed gas source (A) and the remaining amount of liquid in the syringe (S) are set to be the same, environmental factors such as temperature and humidity inside or outside the dispenser or dispensing of the dispenser proceed The first pressure integral value and the second pressure integral value using the pressure values for each time detected through the first pressure sensor 140 and the second pressure sensor 145 for each arbitrary discharge condition by varying the device’s own factors such as the number of times. As a result of the measurement, it was shown in FIGS. 4 and 5 .

As shown in FIG. 4 , as the random discharge condition changes, the level of the first pressure integral value using the pressure value for each time detected through the first pressure sensor 140 shows a large difference as indicated by P1, respectively. appeared scattered.

In addition, referring to FIG. 5 , the level of the second integral value using the pressure value for each time sensed by the second pressure sensor 145 as the random discharge condition is changed also shows a large difference as indicated by P2 and is scattered. However, in the mass production of changes according to random discharge conditions between P1 and P2, there was a corresponding regularity.

Accordingly, the level of difference seen by each point of P2 based on the average baseline of P'2 shown in FIG. 5 is the same as the level of difference seen by each point of P1 based on the average baseline of P'1 shown in FIG. 4 . It can be seen that indicating

Therefore, the second pressure value using the hourly pressure value sensed through the first pressure sensor 140 through the actual normal pressure integral value dash difference ratio of the second pressure integral value using the hourly pressure value detected by the second pressure sensor 145 is used. If the correction process through the compensation process of the 1 pressure integral value is performed, the first pressure integral value is more accurately calculated, and based on this, the remaining amount of liquid in the syringe (S) is identified and the level of the remaining liquid in the syringe (S) is calculated. It is also possible to perform the fine-quantity discharge control function according to the

To this end, the dispenser 100 of the present invention specifies the installation positions of the first pressure sensor 140 and the second pressure sensor 145 , and the control module 170 uses the information receiver 151 to calculate the first pressure integral value. Linked between the components, including the configuration including the unit 152 , the second pressure integral value calculation unit 153 , the normal pressure integration reference value calculation unit 154 , the liquid residual amount calculation unit 155 , and the operation control unit 156 . designed to perform a function.

Specifically, the normal pressure integration reference value calculating unit 154 calculates the normal pressure integration reference value by substituting the gas supply pressure supplied from the preset compressed gas source into Equation 1 below.

Here, Equation 1 is equal to 'C=aX+b' (C: normal pressure integration reference value, X: preset gas supply pressure, 1600<a<1650, 21500<b<22000), corresponding to a constant value a and b are specified within the appropriate range according to the installation positions of the first pressure sensor 140 and the second pressure sensor 145, and the first pressure sensor 140, which is the most preferred embodiment, is the third pipe 113 When installed between the upper discharge valve 130 and the syringe S, and the second pressure sensor 145 is installed between the first air tank 160 and the discharge valve 130 on the second pipe 112, each For the constant value, an appropriate range may be more specifically specified as 1611<a<1612, 21710<b<21712.

In addition, the liquid residual amount calculating unit 155 is a ratio of a difference between the normal pressure integral reference value calculated through the normal pressure integral reference value calculating unit 154 and the second pressure integral value calculated through the second pressure integral value calculating unit 153 . The first pressure integral corrected value is calculated by compensating the first pressure integral value calculated by the first pressure integral value calculating unit 152 as shown in Equation 2 below.

Here, Equation 2 is 'A'=A×{1+(C-B)/C}' (A': first pressure integral correction value, A: first pressure integral value, B: second pressure integral value, C : Same as normal pressure integration standard value).

In fact, as shown in FIG. 6 , the change pattern P1 of the first pressure integral value using the pressure value for each time sensed through the first pressure sensor 140 and the pressure over time sensed through the second pressure sensor 145 . When the change pattern P2 of the second pressure integral value using the value is compared with each other, the same pattern is shown.

Accordingly, as shown in FIG. 7 , the line P′2 indicating the normal pressure integration reference value calculated by the normal pressure integration reference value calculating unit 154 and the hourly pressure detected through the second pressure sensor 145 . Change pattern (P1) of the first pressure integral value using the pressure value for each time detected through the first pressure sensor 140 by the degree of difference (r2) for each time between the change patterns (P2) of the second pressure integral value using the value If the calibration is performed by performing the compensation process (r1) for each hour on the A more accurate first pressure integral value P'1 may be derived.

Subsequently, the liquid residual amount calculating unit 155 calculates the first pressure integral correction value derived by performing a compensation process on the first pressure integral value and the gas supply pressure supplied from the preset compressed gas source A in Equation 3 below. Substitute into to calculate the estimated value of the remaining amount of liquid in the syringe (S).

Here, Equation 3 is 'Z=(A'+cX+d)/(eX-f)' (Z: liquid residual amount estimate value, A': first pressure integral correction value, X: preset gas supply pressure, 1300 <c<1350, 21000<d<21500, 4<e<5, 9<f<10 ), and c, d, e and f corresponding to constant values are the first pressure sensor 140 and the second It is specified within the appropriate range according to the installation position of the pressure sensor 145 .

The first pressure sensor 140, which is the most preferred embodiment, is installed between the discharge valve 130 and the syringe S on the third pipe 113, and the second pressure sensor 145 is installed on the second pipe 112. 1 When installed between the air tank 160 and the discharge valve 130, each constant value is more specifically titrated as 1327<c<1328, 21376<d<21378, 4.4<e<4.5, 9.2<f<9.3. A range may be specified.

Through this, the operation control unit 154 adjusts the opening duration of the discharge valve 130 according to a preset condition based on the estimated remaining liquid amount calculated by the remaining liquid amount calculating unit 153 .

Specifically, the operation control unit 154 is opened in accordance with the discharge pressure value preset in the discharge operation signal input to the operation control unit 154 in proportion to the decrease in the estimated remaining liquid amount calculated by the remaining liquid amount calculating unit 153 . A type of control that increases the opening duration of the discharge valve is performed.

Through this, the dispenser 100 of the present invention accurately calculates the remaining amount of liquid in a syringe without being affected by environmental factors such as temperature and humidity inside or outside the dispenser, or device itself such as the number of times the dispenser is discharged. Not only can it be performed, but furthermore, it is possible to provide a more accurate and high level of reliability of the micro-quantitative discharge control function according to the level of the remaining amount of liquid in the syringe in any situation.

In fact, as shown in Fig. 8, when the syringe (S) is filled with the liquid according to the operation of each function and continuous discharge is performed until the entire amount is discharged, a continuous discharge test that analyzes the change in the discharge amount according to the remaining amount of liquid The results are as follows.

As shown in Fig. 8 (a), after the precise calculation of the remaining amount of liquid in the syringe (S) of the control module 150 is performed through the dispenser 100 of the present invention, a fine quantitative discharge control function according to the level of the remaining liquid is performed. In this case, on the other hand, the discharge amount is kept constant during the continuous dispensing process, but as shown in FIG. It can be seen that, in the case of performing the fine-quantitative discharge control function according to the following, the discharge pattern including irregular and numerous errors appears in the continuous discharge process.

In addition, as shown in Fig. 8(c), the function of precisely calculating the remaining amount of liquid in the syringe (S) of the control module 150 is performed through the dispenser 100 as shown in Fig. 8(c). When continuous dispensing is performed without It can be seen how the provision and advancement of the micro-quantitation discharge control function greatly affects the micro-quantitation discharge result.

The embodiments disclosed in the present invention are intended to explain, not to limit the technical spirit of the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments. The scope of protection should be construed by the claims below, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100 : dispenser
111: first pipe 112: second pipe
113: third pipe 114: fourth pipe
115: fifth pipe 116: sixth pipe
117: seventh pipe 120: first proportional control valve
125: second proportional control valve 130: discharge valve
140: first pressure sensor 145: second pressure sensor
150: control module
151: information receiving unit 152: first pressure integral value calculating unit
153: first pressure integral value calculation unit
154: Normal pressure integral reference value calculation unit
155: liquid residual amount calculation unit 156: operation control unit
160: first air tank 165: second air tank
170: exhaust valve
A: compressed gas source
S: syringe

Claims (15)

a first proportional control valve connected to a compressed gas source for supplying a gas for discharging the liquid filled in the syringe and a first pipe;
One side is connected to the first proportional control valve and the second pipe, and the other side is connected to the syringe and the third pipe, and the gas having the pressure adjusted through the first proportional control valve is supplied to the syringe. a discharge valve to determine whether or not;
a first pressure sensor installed on one side of a specific pipe among the first to third pipes to sense the pressure of the gas passing through the installation point;
a second pressure sensor installed on one side of a specific pipe between the installation point of the first pressure sensor and the compressed gas source among the first to third pipes to sense the pressure of the gas passing through the installation point; and
Based on the first pressure integral value and the second pressure integral value using the pressure values for each time detected by the first pressure sensor and the second pressure sensor, the estimated value of the remaining amount of liquid remaining in the syringe for each discharge cycle is corrected and calculated. It includes; a control module for controlling the opening/closing state of the discharge valve according to the estimated value of the remaining amount of liquid;
The control module is a normal pressure integral representing a reference expectation value for a second pressure integral value using the time-based pressure value sensed through the second pressure sensor to be normally calculated according to the gas supply pressure supplied from the preset compressed gas source. Compensating the first pressure integral value using the hourly pressure value sensed through the first pressure sensor by the ratio of the difference between the reference value and the second pressure integral value using the hourly pressure value actually sensed through the second pressure sensor, Compensation-processed first pressure integral value and the preset gas supply pressure supplied from the compressed gas source, characterized in that calculating the estimated value of the remaining amount of liquid in the syringe for each discharge time
A dispenser with a function to accurately calculate the remaining amount of liquid in a syringe.
According to claim 1,
The first pressure sensor is installed between the syringe and the discharge valve on the third pipe, characterized in that it senses the pressure of the gas toward the syringe side
A dispenser with a function to accurately calculate the remaining amount of liquid in a syringe.
3. The method of claim 2,
The second pressure sensor is installed between the first proportional control valve and the discharge valve on the second pipe, characterized in that it senses the pressure of the gas toward the discharge valve side
A dispenser with a function to accurately calculate the remaining amount of liquid in a syringe.
3. The method of claim 2,
The second pressure sensor is installed between the compressed gas source on the first pipe and the first proportional control valve, characterized in that it senses the pressure of the gas toward the first proportional control valve.
A dispenser with a function to accurately calculate the remaining amount of liquid in a syringe.
4. The method of claim 3,
The dispenser is
A first air tank having a predetermined surge capacity and disposed on the second pipe; further comprising,
The second pressure sensor is installed between the first air tank and the discharge valve on the second pipe, characterized in that it senses the pressure of the gas toward the discharge valve side
A dispenser with a function to accurately calculate the remaining amount of liquid in a syringe.
According to claim 1,
The control module is
an information receiving unit configured to receive first detection information on a pressure value sensed by the first pressure sensor and second detection information on a pressure value sensed by the second pressure sensor;
a first pressure integral value calculating unit for calculating a first pressure integral value for the pressure sensed from the opening time of the discharge valve to a predetermined time based on the first detection information received through the information receiving unit;
a second pressure integral value calculating unit for calculating a second pressure integral value for the pressure sensed from the opening time of the discharge valve to a predetermined time based on the second detection information received through the information receiving unit;
Calculating a normal pressure integral reference value indicating a reference expectation value for a second pressure integral value using the time-based pressure value sensed through the second pressure sensor to be normally calculated according to the gas supply pressure supplied from the preset compressed gas source Normal pressure integral reference value calculation unit;
The first pressure integral calculated by the first pressure integral value calculator by the ratio of the difference between the normal pressure integral reference value calculated by the normal pressure integral reference value calculator and the second pressure integral value calculated by the second pressure integral value calculator a liquid residual amount calculating unit for calculating an estimated residual liquid amount in the syringe based on a first pressure integral correction value derived by compensating the value and a preset gas supply pressure supplied from the compressed gas source; and
and an operation controller for controlling the opening and closing states of the first proportional control valve and the discharge valve;
wherein the operation control unit adjusts the opening duration of the discharge valve according to a preset condition based on the estimated remaining liquid amount calculated by the remaining liquid amount calculating unit
A dispenser with a function to accurately calculate the remaining amount of liquid in a syringe.
7. The method of claim 6,
wherein the operation control unit increases the opening duration of the discharge valve in proportion to a decrease in the estimated remaining liquid amount calculated by the remaining liquid amount calculating unit
A dispenser with a function to accurately calculate the remaining amount of liquid in a syringe.
delete delete delete a first proportional control valve connected to a compressed gas source for supplying a gas for discharging the liquid filled in the syringe and a first pipe; One side is connected to the first proportional control valve and the second pipe, and the other side is connected to the syringe and the third pipe, and the gas having the pressure adjusted through the first proportional control valve is supplied to the syringe. a discharge valve to determine whether or not; a first pressure sensor installed on one side of a specific pipe among the first to third pipes to sense the pressure of the gas passing through the installation point; a second pressure sensor installed on one side of a specific pipe between the installation point of the first pressure sensor and the compressed gas source among the first to third pipes to sense the pressure of the gas passing through the installation point; And based on the first pressure integral value and the second pressure integral value using the pressure values for each time detected by the first pressure sensor and the second pressure sensor, the estimated value of the remaining amount of liquid remaining in the syringe for each discharge time is corrected and calculated. In a method of precisely calculating the remaining amount of liquid in a syringe through a dispenser comprising a; a control module for controlling the opening/closing state of the discharge valve according to the estimated remaining amount of liquid,
A step of controlling the opening and closing states of the first proportional control valve and the discharge valve by the operation control unit in the control module according to the discharge operation signal input to the control module;
Step B of receiving, by an information receiving unit in the control module, first detection information and second detection information for a pressure value sensed by the first pressure sensor and the second pressure sensor;
C in which the first pressure integral value calculator in the control module calculates the first pressure integral value for the pressure sensed from the time when the discharge valve is opened to a predetermined time based on the first detection information received through the step B step;
D in which a second pressure integral value calculation unit in the control module calculates a second pressure integral value for the pressure sensed from the time when the discharge valve is opened to a predetermined time based on the second detection information received through the step B step;
The reference for the second integral pressure value using the pressure value for each time sensed through the second pressure sensor to be normally calculated according to the gas supply pressure supplied from the compressed gas source preset by the normal pressure integral reference value calculation unit in the control module E step of calculating a normal pressure integration reference value representing the expected value;
The residual liquid amount calculation unit in the control module compensates the first pressure integral value calculated in the C step by the ratio of the difference between the normal pressure integral reference value calculated in the E step and the second pressure integral calculated in the D step. F step of deriving a first pressure integral correction value by processing;
a G step of calculating an estimated value of the remaining amount of liquid in the syringe based on the first pressure integral correction value derived through the F step and the preset gas supply pressure supplied from the compressed gas source; and
and an H step in which the operation control unit adjusts an opening duration of the discharge valve according to a preset condition based on the estimated remaining amount of liquid calculated through the G step;
A method of precisely calculating the amount of liquid remaining in a syringe through a dispenser.
12. The method of claim 11,
The H step is a step in which the operation control unit increases the opening duration of the discharge valve in proportion to a decrease in the estimated remaining liquid amount calculated by the remaining liquid amount calculating unit.
A method of precisely calculating the amount of liquid remaining in a syringe through a dispenser.
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