KR20110065613A - Effective-area measurement for air-operated actuator - Google Patents

Abstract

PURPOSE: A effective cross-sectional area measure system of air-driven is provided to measure the effective cross-sectional area with signal received from the pressure measuring sensor and power measuring element in the state putting on air-driven on the measuring device part by the data acquisition unit, and to improved the accuracy of the measurement on the effective cross-sectional area of air-driven. CONSTITUTION: The effective cross-sectional area measure system of air-driven includes: a measurement base(100); an air supply part; a pressure measurement sensor; and a data acquisition unit. In the state where the measurement base separates the connection bridge(12) of the air-driven(10), The power measuring element is included in order to measure the deformation of the power actuating on the stem(13). The air supply part supplies within air-driven while diversifying the supply quantity of the compressed air. In order to measure the pressure gradient within air-driven in the air supply part with the provided compressed air, the pressure measurement sensor is connected. The data acquisition unit obtains the effective cross-sectional area of air-driven by analyzing and data processing the measurement signal which is input from the pressure measurement sensor and power measuring element. The measurement base includes: an eat plate(120); a stand(130); a support plate(140); an elevating member(150); and a power measuring element. The stand supports the seat plate from the surface. The support plate is connected to the seat plate to be arranged at the lower part of the operation ball(122). The elevating member is ascended and descended installed in the support plate. The power measuring element, which is connected in between the elevating member and stem, measures the change of the power actuating in stem.

Description

Effective area measuring device for air actuators {EFFECTIVE-AREA MEASUREMENT FOR AIR-OPERATED ACTUATOR}

The present invention relates to an apparatus for measuring an effective area of an air driver, and more particularly, to an apparatus for measuring an effective area of an air driver that can improve the accuracy of measurement while conveniently and easily measuring the effective area of an air driver.

As is well known, the air driver delivers large compressed air to the air drive valve, which is provided with a stem connected to the air drive valve, and has a spring built in to restore the stem.

The above-described air actuator can be used by connecting to a suitable air drive valve to know the value of the parameter for the effective cross-section, if the value of the parameter for the effective cross-sectional area of the air actuator is not provided or provided, as shown in Figure 1 The effective area was calculated by measuring the housing inner diameter (D) of the air actuator 10 and substituting it into Equation 1 below.

(Equation 1)

However, this method of measuring the effective cross-sectional area of the air driver 10 has a problem that the measured value of the effective cross-sectional area is not accurate due to the measurement error of the contact surface of the diaphragm elastically deformed with the bent portion inside the housing.

In addition, the process of measuring the inner diameter of the housing of the air driver 10 is not only complicated and cumbersome, but there is a problem in that the measured value may not be accurate.

The present invention has been made to solve the above-mentioned conventional problems, an object of the present invention is to measure the effective cross-sectional area of the air actuator and to improve the accuracy of the measurement while improving the accuracy of the measurement of the effective area of the air actuator To provide.

In order to achieve the above object, the present invention, in the air driver 10 is provided with a plurality of connecting legs 12 and the stem 13 to be connected to the air driving valve, the connecting legs of the air driver 10 A measuring table 100 equipped with a force measuring element 110 to measure the deformation of the force acting on the stem 13 in a state where the fixing 12 is detachably fixed, and supply of compressed air into the air driver 10. Pressure supply sensor 300, the pressure measurement sensor 300 is connected to measure the change in the pressure in the air driver 10 by the compressed air supplied from the air supply unit 200, supplying a change And a data acquisition unit 400 for analyzing the measurement signal input from the force measuring element 110 and processing the data to obtain an effective cross-sectional area of the air driver 10.

Here, the measuring base 100 is a seat plate for drilling the operating hole 122 so that the stem 13 is operated up and down to secure the connecting leg 12 of the air driver 10 by means of fixing means. 120, a stand 130 supporting the seat plate 120 from the ground, a support plate 140 connected to the seat plate 120 to be disposed below the operation hole 122, and the support plate 140. The elevating member 150 is mounted to be movable up and down, and the force measuring element 110 is connected between the elevating member 150 and the stem 13 to measure a change in force acting on the stem 13.

The fixing means includes a through hole 124 formed in the seat plate 120 so that the first male screw 12a and the first male screw 12a provided at the lower end of the connecting leg 12 of the air driver 10 pass through the fixing member 12a. ), A first female screw 12b screwed to the first male screw 12a penetrated by the through hole 124 to detachably fix the connecting leg 12.

In addition, the elevating member 150 is mounted to the support plate 140 to be elevated, the screw screw to secure the lead screw 152, the lead screw 152 supporting the bottom of the force measuring element 110 It consists of a screw nut 154.

In particular, the force measuring element 110 is made of a load cell, the first coupling groove 112 is formed on the lower surface of the load cell to be coupled to the upper end of the lead screw 152, the stem 13 on the upper surface of the load cell The second coupling groove 114 may be formed to be coupled to the lower end of the.

On the other hand, the air supply unit 200, the compressor 210 for generating the compressed air, the air pressure of the compressed air generated by the compressor 210 to be supplied to the air driver 10 while changing in accordance with the signal of the data acquisition unit It consists of a connected regulator 220.

According to the present invention implemented by the above means, since the data acquisition unit conveniently and easily measures the effective cross-sectional area by the signal received from the pressure measuring sensor and the force measuring element while the air actuator is placed on the measuring base, There is a very useful effect that can improve the accuracy of the measurement of the effective area of the actuator.

In addition, the present invention, there is an effect that can accurately measure the effective cross-sectional area of the air driver even if the position of the stem of the air driver according to the lifting of the lifting member in any state of the R state or E state.

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

The effective cross-sectional measuring device of the air driver of the present invention is a force measuring element 110 to measure the deformation of the force acting on the stem 13 in a state in which the connecting leg 12 of the air driver 10 is detachably fixed. The pressure change in the air driver 10 by the air supply unit 200, the compressed air supplied from the air supply unit 200, the air supply unit 200 to supply while changing the supply amount of compressed air into the measuring table 100, the air driver 10 equipped with Data acquisition unit for obtaining the effective cross-sectional area of the air driver 10 by analyzing and data processing the measurement signal input from the pressure measuring sensor 300, the pressure measuring sensor 300 and the force measuring element 110 connected to measure the What constituted 400 is made into the technical idea.

First, a vertical stem 13 is provided to protrude from the lower center of the air driver 10 so as to be connected to an air driving valve (not shown). In this specification, the stem 13 is operated upwards to provide a housing. The state of being fully retracted into the inside of (11) is defined as R (Retracted), and the state of the stem 12 being operated downward and completely drawn out of the housing 11 is defined as E (Extended). In addition, a plurality of connecting legs 12 are provided on the bottom of the air driver 10 at predetermined intervals, and are fixed to the measuring base 100, and a first male screw 12a is provided at the lower end of each connecting leg 12. .

Measuring base 100 is a fixedly mounted air actuator 10 to measure the deformation of the force acting on the stem 13, this measuring base 100 is operated so that the stem 13 is operated up and down A hole 122 is drilled and disposed under the seat plate 120, a stand 130 for supporting the seat plate 120 from the ground, and a working hole 122 to secure the connecting leg 12 with a fixing means. The support plate 140 connected to the seat plate 120, the elevating member 150 mounted on the support plate 140 to be elevated, and the elevating member 150 and the stem 13 are connected to each other in the stem 13. It is composed of a force measuring element 110 for measuring a change in the force acting.

The seat plate 120 is formed in a disk shape of an appropriate size to match the housing 11 of the air driver 10, the operating hole 122 is perforated so as to pass through the top and bottom in the center, a plurality of through A ball 124 is formed to penetrate the connecting leg 12 of the air driver 10. Thus, the first female screw 12b is connected to the first male screw 12a of the connecting leg 12 penetrated by the through hole 124. Is screwed to securely connect the connection leg 12 to the seat plate 120. That is, the first male screw 12a, the through hole 124, and the first female screw 12b described above form a component that implements a fixing means for detachably fixing the connecting leg 12.

Stand 130 is to support the seat plate 120 to achieve a predetermined height from the ground, the stand 130 is a plurality of support legs 132, the support legs 132 for supporting the bottom of the seat plate 120 It is mounted to the lower end of the support leg 132 consists of a flow preventing ring 134 to prevent the flow of the left and right or front and rear. The upper end of the vertical support leg 132 is connected to the bottom of the seat plate 120, the lower end is connected to the ring-shaped flow prevention piece 134 to form a predetermined thickness, the flow prevention piece 134 As a result, a phenomenon in which the support leg 132 and further, the seat plate 120 flows in all directions is prevented.

The support plate 140 is formed smaller than the diameter of the seat plate 120 and is disposed below the operation hole 122. For this purpose, the support plate 140 is formed with a plurality of sleeves 142 to form the seat plate 120. A plurality of stud bolts 144 connected to the bottom of the fitting is inserted, the fixing nut 146 is screwed to the lower end of the stud bolt 144 penetrating the sleeve 142 to support plate 140 seat plate 120 Fasten firmly to the In addition, a guide nut 148 is provided at the center of the support plate 140 so as to be connected up and down.

The elevating member 150 is mounted on the support plate 140 so as to elevate and adjust the height of the force measuring element 110. The elevating member 150 is screwed to the guide nut 148 of the support plate 140. Lead screw 152 coupled to support the bottom of the force measuring element 110, the screw screw 154 is screwed to secure the elevated lead screw 152 to the support plate 140. Accordingly, the lead screw 152 is screwed to the guide nut 148, the upper end of which is coupled to the first coupling groove 112 formed on the bottom of the force measuring element 110, the bottom of the force measuring element 110 At the lower end, the screw nut 154 is screwed to firmly fix the lead screw 152 that adjusts the height of the force measuring device 110. That is, the force measuring device 110 is raised or lowered by the rotation of the lead screw 152.

The force measuring element 110 is interposed between the lead screw 152 and the stem 13 of the elevating member 150 to measure the change in the force acting on the stem 13, such a force measuring element 110 It is preferable to be implemented as a load cell, the first coupling groove 112 is formed on the bottom surface of the load cell is coupled to the upper end of the lead screw 152, the second coupling groove 114 is formed on the upper surface of the stem 13 The lower end of is combined. The outer surface of the lower end of the first coupling groove 112 is more firmly supported by the support nut 156 screwed to the upper end of the lead screw 152.

The air supply unit 200 supplies compressed air into the air driver 10. The air supply unit 200 changes the air pressure of the compressed air generated by the compressor 210 and the compressor 210 to generate the compressed air. While being configured as a regulator 220 to discharge to the air driver (10). The regulator 220 discharges the compressed air supplied from the compressor 210 while changing from low pressure to high pressure or high pressure to low pressure according to the signal output from the data acquisition unit 400.

The data acquisition unit 400 obtains the effective cross-sectional area of the air driver 10 by analyzing and data processing the measurement signals input from the pressure measuring sensor 300 and the force measuring element 110. 400 is preferably implemented as a Data Acquisition System (DAS). That is, the DAS is applied to the regulator 220 while changing the current signal within the range of 4 ~ 20㎃ to supply pressure to the inside of the air driver 10 from 0 to a predetermined pressure (psi), based on the pressure The measurement signal input from the measuring sensor 300 and the force measuring element 110 is analyzed and data processed to output numerical data. At this time, the behavior of the measurement signal input from the pressure measuring sensor 300 is shown as shown in Figure 5 (a), the behavior of the measurement signal input from the force measuring element 110 as shown in Figure 5 (b). appear. Extracting the linear section of the input pressure measurement signal and the force measurement signal as described above is converted to a distributed graph as shown in Figure 6, and thus the slope of the graph indicates that the effective area of the air driver 10. 6 (a) is the effective cross-sectional area when the stem 13 of the air driver 10 supplies the air pressure in the R state, (b) is the air pressure in the R state of the stem 13 of the air driver 10 a graph showing the effective area at the time of discharge, (a) shows a ^{230.65 (in 2), (b} ) in Fig. 6 in Fig. 6 are given the effective area of 230.67 (in ^2).

When described in detail with reference to the accompanying drawings the overall operating relationship of the present invention configured as described above.

First, the connecting leg 12 of the air driver 10 is penetrated by the through hole 124 of the seat plate 120, and then the first female screw 12b is screwed to the first male screw 12a to thereby provide an air driver 10. ) And then, the stem 13 is coupled to the second coupling groove 114 of the force measuring element 110.

Subsequently, the lead screw 152, which is the elevating member 150, is rotated to be coupled to the first coupling groove 112 of the force measuring element 110 to firmly fix the force measuring element 110 at the top and the bottom thereof.

Here, referring to FIG. 7, (a) is a cross-sectional view for measuring the effective cross-sectional area of the air driver 10 in the R state of the stem 13 of the air driver 10 mentioned above, and (b) is the air driver 10. A cross-sectional view showing the effective cross-sectional area of the air actuator 10 in the E state of the stem 13, which clearly indicates that the effective cross-sectional area of the air actuator 10 can be measured in this way.

When the data acquisition unit 400 is operated in this state, the current signal is applied to the regulator 220 while varying the current signal within the range of 4 to 20 mA, and the pressure inside the air driver 10 is set from 0 to a predetermined pressure (psi). And then, the measurement signal input from the pressure measuring sensor 300 and the force measuring element 110 based on this analysis and data processing to output the numerical data as shown in FIG.

The present invention is not limited only to the above-described embodiments, and various modifications, changes, substitutions, and additions can be made in various forms without departing from the spirit of the present invention. I can understand. If such improvement, change, replacement, or addition is carried out within the scope of the following claims, it is obvious that the technical idea also belongs to the present invention.

1 is a cross-sectional view of a general air driver.

Figure 2 is an exploded cross-sectional view of the present invention.

Figure 3 is a cross-sectional view of the combination of the present invention.

4 is a block diagram of the present invention.

5 is a graph showing the behavior of the measurement signal of the present invention.

Figure 6 is a graph showing the effective cross-sectional area of the air actuator of the present invention.

Fig. 7 is a sectional view showing an R state and an E state of the stem of the present invention.

♠ Explanation of symbols on the main parts of the drawing ♠

10 air driver 13 stem

100: measuring base 110: force measuring element

120: seat plate 122: operating hole

130: stand 140: support plate

150: lifting member 152: lead screw

200: air supply unit 210: compressor

220: regulator 300: pressure measuring sensor

400: data acquisition unit

Claims (6)

In the air driver 10 is provided with a plurality of connecting legs 12 and the stem 13 to be connected to the air driving valve, Measuring base 100 with a force measuring element 110 to measure the deformation of the force acting on the stem 13 in a state in which the connecting leg 12 of the air driver 10 is detachably fixed, the air Pressure measuring sensor 300 connected to measure the change in pressure in the air driver 10 by the air supply unit 200 to supply while changing the supply amount of compressed air into the driver 10, the compressed air supplied from the air supply unit 200 ), And a data acquisition unit 400 for acquiring the effective cross-sectional area of the air driver 10 by analyzing and data processing the measurement signals input from the pressure measuring sensor 300 and the force measuring element 110. Effective area measurement device for air actuators. The method according to claim 1, The measuring base 100, The seat plate 120 and the seat plate 120 are drilled so that the stem 13 is operated up and down to secure the connecting leg 12 of the air driver 10 with a fixing means. Stand 130 supporting the ground from the ground, the support plate 140 connected to the seat plate 120 to be disposed below the operating hole 122, the elevating member 150 mounted on the support plate 140 to be elevated And a force measuring element (110) connected between the elevating member (150) and the stem (13) to measure a change in force acting on the stem (13). The method according to claim 2, The fixing means, The through hole 124 formed in the seat plate 120 to pass through the first male screw 12a and the first male screw 12a provided at the lower end of the connecting leg 12 of the air driver 10. An effective cross-sectional area measuring device for an air actuator, comprising: a first female screw (12b) detachably fixed to a connecting leg (12) by screwing into a first male screw (12a) penetrated by a 124). The method according to claim 2, The lifting member 150, It is composed of a lead screw 152 which is mounted to the support plate 140 to be lifted and lowered to support the bottom surface of the force measuring element 110, screw nut 154 is screwed to secure the lead screw 152. An effective cross-sectional measuring device for an air actuator. The method according to claim 4, The force measuring element 110 is made of a load cell, The first coupling groove 112 is formed on the lower surface of the load cell to be coupled to the upper end of the lead screw 152, and the second coupling groove 114 is formed on the upper surface of the load cell to be coupled to the lower end of the stem 13. An effective cross-sectional measuring device for an air actuator. The method according to claim 1, The air supply unit 200, Compressor 210 for generating compressed air, characterized in that consisting of a regulator 220 connected to supply to the air driver 10 while changing the air pressure of the compressed air generated by the compressor 210 according to the signal of the data acquisition unit Effective area measuring device of air actuator.

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