KR100793918B1 - Gas measuring device - Google Patents

Abstract

A gas measuring device is provided to reduce the overall size of the device by integrating a sensor sensing smell or gas in the air, a pump guiding the air flow actively, and a measuring chamber, and by placing an optical waveguide sensor within the chamber. A gas measuring device comprises a chamber(100), a moving plate(140), a magnet(145), a plurality of coils(130), and a sensor(160). The chamber includes a plurality of gas inlets(110) on the bottom. The moving plate is elastically supported by a spring(150) within the chamber. The vertically mounted magnet is protruded upward in the center of the moving plate. The coils, mounted on an outer periphery of the magnet, are protruded downward on a circuit board(120) defined in an area except for a moving path of the magnet. The sensor is disposed on the bottom of the chamber. The coils are cylindrical to surround the outer periphery of the magnet, or provided in plural at regular intervals along the outer periphery of the magnet. The upper surface of the chamber, corresponding to the position of the magnet, allows entrance of the magnet.

Description

Gas measuring device {GAS MEASURING DEVICE}

1 is a front view showing a gas measuring apparatus structure according to the prior art.

2 is a block diagram of another gas measuring apparatus according to the prior art.

3 is a perspective view showing the structure of a gas measuring apparatus according to a first embodiment of the present invention;

4 is a cross-sectional view taken along line IV-IV ′ of FIG. 3.

5 is a view showing in detail the position of the coil according to the first embodiment of the present invention.

6 is a cross-sectional view showing a modification of the gas measuring device according to the first embodiment of the present invention.

7 is a cross-sectional view for explaining the operation of the gas measuring apparatus according to the first embodiment of the present invention.

8 is a perspective view showing the structure of a gas measuring apparatus according to a second embodiment of the present invention;

9 is a cross-sectional view taken along the line VII-VII ′ of FIG. 8.

10 is a view showing in detail the position of the coil according to the second embodiment of the present invention.

11 is a cross-sectional view for explaining the operation of the gas measuring apparatus according to the second embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: chamber 105: locking jaw

110: gas entrance hole 120: circuit board

130: coil 140: fluid plate

145: magnet 150: spring

160: sensor 170: airtight space

The present invention relates to a gas measuring apparatus, and more particularly, to integrate a sensor for measuring the smell or gas in the air, a pump for inducing the flow of air and a measuring chamber, and a sensor using an optical waveguide in the chamber. The present invention relates to a gas measuring device capable of improving the measuring speed and accuracy by reducing the size.

In general, air contains gases having chemical components such as various odors. These odor or gaseous constituents in the air can harm people directly or indirectly in various forms, and conversely can give a great deal of useful information.

Accordingly, it is conventionally used to detect odors or gaseous components in the air, which is useful for food quality, human disease, discrimination of imported agricultural and livestock products, drug detection, detection of harmful substances such as dioxins, biochemical terrorism prevention, and military fields. In order to provide information, we are investigating how to detect gases with chemical components in the air.

Next, a gas measuring apparatus according to the prior art will be described in detail with reference to FIGS. 1 and 2.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front view showing the structure of a conventional gas measuring apparatus disclosed in Fig. 2 of Prior Art Document 1 (Japanese Laid-Open Patent Publication No. 2005-127743).

Referring to FIG. 1, a conventional gas measuring apparatus includes a conventional sensor box 40 as ammonia gas measuring apparatus, a resin base (not shown) that serves as a bottom of the sensor box 40, and the base. Three terminals 10 ₁ , 10 ₂ , 10 ₃ and 30, which penetrate 30 and protrude into and out of the sensor box 40 and the terminals 10 ₁ , 10 ₂ , 10 ₃ from platinum or a platinum alloy A sensing unit A including a gas body (not shown) for connecting and fixing the combined heater and core wire electrodes 20 ₁ , 20 ₂ , and 20 ₃ to be formed, and installed on an upper surface of the sensor box 40. It consists of the stainless steel wire mesh 41 for gas introduction.

The gas measuring device as described above operates as follows.

The electric resistance value between the electrodes 20 ₁ , 20 ₂ , and 20 ₃ positioned in the sensing unit A is measured, and at this time, the gas is introduced into the gas introduction wire mesh 41 based on the measured electric resistance value. Detected ammonia gas concentration.

However, the conventional gas measuring apparatus as described above has a wire mesh 41 which is an inlet through which air can flow into the sensing unit A, and detects only ammonia gas in the air introduced into the sensing unit A through the wire mesh 41. It does not have a function of inducing the flow of ambient air to the wire mesh 41, that is, the sensing unit A, and also does not have a function of actively discharging the air introduced into the sensing unit A.

In other words, the gas measuring apparatus according to the prior art is not passive, and because it is passive, does not have excellent performance in speed and accuracy capable of measuring the gas distributed in the surrounding air, and quickly and completely discharges the gas in the sensing unit A. It is difficult to have a disadvantage in that the error range is wide and repeated measurement time is long.

In order to solve this problem, as disclosed in FIG. 1 of the prior art document 2, a gas measuring apparatus having a pump capable of actively introducing and discharging gas has been proposed. Figure 2 is a schematic diagram showing a conventional gas measurement apparatus structure disclosed in Figure 1 of the prior art document 2 (US Patent No. 6212938).

The conventional gas measuring apparatus shown in FIG. 2 is provided with a separate pump for actively inducing the flow of air in order to analyze the gases in the air quickly and accurately.

However, when a separate pump is provided as described above, the size of the gas measuring device becomes large, which makes it difficult to downsize.

In addition, the conventional gas measuring device equipped with a pump has a problem of low accuracy because it does not have a closed measuring space so that the gas can be measured stably without being influenced by the external environment such as air flow and temperature during measurement. have.

Accordingly, an object of the present invention is to provide a miniaturized integrated gas measuring apparatus including a pump capable of actively inducing air flow, a measuring chamber and a sensor in order to solve the above problems.

In order to achieve the above object, the present invention provides a chamber having a plurality of gas access holes at the bottom, a flow plate elastically supported by a spring inside the chamber, and a magnet installed vertically protruding upward from the center of the flow plate And a coil disposed on an outer circumferential surface of the magnet, the coil protruding downward from a circuit board formed in an area excluding the magnet transfer path of the upper surface of the chamber, and a sensor disposed on the bottom surface of the chamber.

In the gas measuring apparatus of the present invention, the coil may be formed in a cylindrical shape surrounding the outer circumferential surface of the magnet, or a plurality of coils may be formed at equal intervals along the outer circumferential surface of the magnet.

In addition, in the gas measuring device of the present invention, the upper surface of the chamber corresponding to the position of the magnet is preferably protruded upward to enable the upper flow of the magnet.

In addition, in the gas measuring apparatus of the present invention, the chamber is preferably located on the inner circumferential surface of the position higher than the gas entrance hole is a locking step formed so as to span a portion of the outer peripheral portion of the flow plate. In more detail, the locking jaw may be uniformly protruded along the inner circumferential surface of the chamber, or a plurality of protrusions having a uniform height may be formed at equal intervals.

In the gas measuring apparatus of the present invention, it is preferable that the coil generates an electromagnetic force in a gap with a magnet located inside by applying an external power source so that the magnet is vertically conveyed inside the bean.

In addition, in the gas measuring device of the present invention, the chamber is preferably formed with an opening of the lower opening, it is coupled to the lower plate sealing the opening.

In the gas measuring apparatus of the present invention, the chamber is preferably formed in a cylindrical shape.

In the gas measuring apparatus of the present invention, the sensor is preferably manufactured using an optical waveguide.

Another object of the present invention for achieving the above object is a chamber having a plurality of gas access holes at the bottom, the elastic plate is elastically supported by a spring in the interior of the chamber, a magnetic plate, and a circuit formed on the upper surface inside the chamber The present invention provides a gas measuring apparatus including a coil protruding downwardly from a bottom surface of a substrate and a sensor disposed on the bottom surface of the chamber.

In the gas measuring apparatus of the present invention, the coil is preferably formed at least one protruding from the lower surface of the circuit board toward the flow plate.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. Like reference numerals designate like parts throughout the specification.

A gas measuring apparatus according to an embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

Example  One

First, the structure of the gas measuring apparatus according to the first embodiment of the present invention will be described in detail with reference to FIGS. 3 to 6.

3 is a perspective view showing the structure of a gas measuring apparatus according to a first embodiment of the present invention, Figure 4 is a cross-sectional view taken along the line IV-IV 'of FIG.

As shown in FIGS. 3 and 4, the gas measuring apparatus according to the first embodiment of the present invention includes a chamber 100, a fluid plate 140, a magnet 145, a coil 30, and a sensor. It consists of 160.

The chamber 100 has a plurality of gas inlet and outlet 110 for intake and discharge of air in the lower portion. At this time, the gas inlet and outlet 110 is preferably formed at equal intervals on parallel lines along the lower outer circumferential surface of the chamber.

In particular, the chamber 100 according to the present embodiment has an opening with a lower portion, and is composed of a combination with a lower plate 100a for sealing the opening. This is to facilitate the repair or cleaning of the interior of the chamber 100, it is not an essential component for achieving the technical problem of the present invention.

In addition, although the chamber 100 has a cylindrical shape in the present embodiment, this is not limited thereto and may be changed according to the use space and use characteristics of the chamber 100.

In addition, the chamber 100 according to the present embodiment preferably includes a protrusion 103 protruding upward so that the upper surface corresponding to the position of the magnet to be described later can be introduced into the magnet.

The flow plate 140 is elastically supported by a spring 150 formed inside the chamber 100. That is, the gas may be sucked or discharged through the gas access hole 110 formed in the lower portion of the chamber 100 by the vertical movement of the flow plate 140.

On the other hand, when the flow plate 140 moves up and down for the inflow of gas, the flow plate 140 to block the gas entrance hole 110 of the chamber 100 to prevent the intake and discharge of air Should be prevented.

Therefore, as shown in FIG. 6, the chamber 100 according to the present exemplary embodiment includes a latching jaw formed to cover a portion of the outer circumferential edge of the flow plate 140 on an inner circumferential surface of a position higher than the gas access hole 110. 105). 6 is a cross-sectional view showing a modification of the gas measuring apparatus according to the first embodiment of the present invention.

 In more detail, the locking jaw 105 may be formed as a closed curve enclosed in parallel along the inner circumferential surface of the chamber 100, or may be formed in plural at equal intervals on the parallel line along the inner circumferential surface of the chamber 100.

The magnet 140 is vertically installed to protrude upward to face the upper surface of the chamber 100 at the central portion of the flow plate 140.

The coil 130 is positioned on the outer circumferential surface of the magnet 140 and protrudes downward from the circuit board 120 formed in an area excluding the transfer path of the magnet 140 on the upper surface of the chamber 100.

More specifically, the coil 130 is preferably formed in a cylindrical shape surrounding the outer circumferential surface of the magnet 145 (see Fig. 5). 5 is a view showing in detail the position of the coil according to the first embodiment of the present invention.

On the other hand, since the coil 130 is located on the outer circumferential surface of the magnet 145 to form a magnetic field with the magnet 145, the coil 130 is not limited thereto, but the magnet (not shown) A plurality of 145 may be formed along the outer circumferential surface at equal intervals.

That is, the coil 130 and the magnet 145 are formed to function as a pump by moving the flow plate 140 up and down by a magnetic field.

The sensor 160 is disposed on the bottom surface of the chamber 100, that is, the upper surface of the lower plate 100a. Accordingly, the sensor 160 actively enters the air through the gas access hole 110 into the sealed space 170 formed between the bottom surface of the flow plate 140 and the bottom surface of the chamber 100. The gas component, concentration, etc. in the measurement can be measured accurately and stably.

Preferably, the sensor 160 is composed of a sensor manufactured by using an optical waveguide to improve the sensitivity to the gas to be measured, thereby allowing more accurate gas measurement.

Hereinafter, the operation of the gas measuring apparatus according to the first embodiment of the present invention will be described in detail with reference to FIG. 7.

7 is a cross-sectional view for explaining the operation of the gas measuring apparatus according to the first embodiment of the present invention.

First, a constant current is applied to the coil 130 located on the outer circumferential surface of the magnet 145 through the circuit board 120.

Then, a magnetic field is formed between the magnet 145 and the coil 130, the magnet 145 is a linear movement under the influence of this magnetic field to move upwards, the fluid plate 140 connected thereto is also upward Will be moved. Accordingly, the volume of the interior of the chamber 100 is instantaneously increased and the pressure is lowered to allow the outside air to be sucked into the sealed space 170 through the gas entrance hole 110.

Next, the outside air sucked into the sealed space 170 is measured through the sensor 160.

Then, when the application of the current to the coil 130 is stopped, the magnetic field formed between the coil 130 and the magnet 145 disappears. Therefore, the magnet 145 moves downward to return to its original position and is supported by the locking jaw 105. At this time, the volume of the space inside the chamber 100 is instantaneously reduced and the pressure is increased so that the internal air located in the closed space 170 through the gas entrance hole 110 is discharged to the outside.

The present invention can increase the gas detection speed of the sensor by actively performing the suction and discharge of the air containing the gas to be measured on the basis of the above principle, it is possible to fast recovery (recovery) operation for the next operation .

In addition, since the internal space of the chamber 100 in which the sensor 160 is located is a closed space, it is possible to measure a stable and accurate gas without being affected by the surrounding environment of the chamber 100.

In addition, since the gas entrance hole 110 is formed on the outer circumferential surface of the chamber 100, since the air sucked or discharged does not directly affect the sensor 160 disposed on the bottom surface, it is sensitive to the flow of air. The sensor 160 may be protected.

Example  2

Next, a gas measuring apparatus according to a second exemplary embodiment of the present invention will be described with reference to FIGS. 8 to 11.

First, the structure of the gas measuring apparatus according to the second embodiment of the present invention will be described in detail with reference to FIGS. 8 and 9. 8 is a perspective view illustrating a structure of a gas measuring apparatus according to a second exemplary embodiment of the present invention, and FIG. 9 is a cross-sectional view taken along the line VII-VII 'of FIG. 8.

As shown in FIG. 8 and FIG. 9, the gas measuring apparatus according to the second embodiment of the present invention includes a chamber 100, a fluid plate 140 made of magnetic material, a coil 30, and a sensor 160. Consists of.

The chamber 100, like the first embodiment, has a plurality of gas inlet and outlet 110 for intake and discharge of air in the lower portion. At this time, the gas inlet and outlet 110 is preferably formed at equal intervals on parallel lines along the lower outer circumferential surface of the chamber.

In particular, the chamber 100 according to the present embodiment has an opening with a lower portion, and is composed of a combination with a lower plate 100a for sealing the opening. This is to facilitate the repair or cleaning of the interior of the chamber 100, it is not an essential component for achieving the technical problem of the present invention.

In addition, although the chamber 100 has a cylindrical shape in the present embodiment, this is not limited thereto and may be changed according to the use space and use characteristics of the chamber 100.

The flow plate 140 is elastically supported by a spring 150 formed inside the chamber 100. That is, the air may be sucked or discharged through the gas access hole 110 formed in the lower portion of the chamber 100 by the vertical movement of the flow plate 140.

On the other hand, when the flow plate 140 moves up and down for the inflow of gas, the flow plate 140 to block the gas entrance hole 110 of the chamber 100 to prevent the intake and discharge of air In order to prevent the chamber 100 according to the present embodiment has a locking step 105 formed to cover a portion of the outer periphery of the flow plate 140 on the inner peripheral surface of the position higher than the gas entrance hole 110.

 In more detail, the locking jaw 105 may be formed as a closed curve enclosed in parallel along the inner circumferential surface of the chamber 100, or may be formed in plural at equal intervals on the parallel line along the inner circumferential surface of the chamber 100.

The coil 130 protrudes downward from the lower surface of the circuit board 120 formed on the upper surface of the chamber 100.

More specifically, the coil 130 is preferably formed to protrude at least one toward the flow plate 140 from the lower surface of the circuit board 120. Referring to FIG. 10, three coils 130 are uniformly formed on the bottom surface of the circuit board 120. 10 is a view showing in detail the position of the coil according to the second embodiment of the present invention.

On the other hand, since the coil 130 is intended to form a magnetic field with the fluid plate 140 made of a magnetic material, it is not limited thereto, and although not shown, along the outer circumferential surface of the magnet 145. Multiple pieces may be formed at equal intervals.

That is, the fluid plate 140 formed of the coil 130 and the magnetic material is formed to function as a pump by a magnetic field.

The sensor 160 is disposed on the bottom surface of the chamber 100, that is, the upper surface of the lower plate 100a. Accordingly, the sensor 160 actively enters the air through the gas access hole 110 into the sealed space 170 formed between the bottom surface of the flow plate 140 and the bottom surface of the chamber 100. The gas component, concentration, etc. in the measurement can be measured accurately and stably.

Preferably, the sensor 160 is composed of a sensor manufactured by using an optical waveguide to improve the sensitivity to the gas to be measured, thereby allowing more accurate gas measurement.

Hereinafter, an operation of the gas measuring apparatus according to the second exemplary embodiment of the present invention will be described in detail with reference to FIG. 11.

11 is a cross-sectional view for explaining the operation of the gas measuring apparatus according to the second embodiment of the present invention.

First, a constant current is applied to the coil 130 through the circuit board 120.

Then, a magnetic field is formed between the coil 130 and the fluid plate 140 made of a magnetic material, and the fluid plate 140 is linearly moved under the influence of the magnetic field, and moves upwards. The chamber 100 ) The volume of the inner space is instantaneously increased and the pressure is lowered so that the outside air is sucked into the sealed space 170 through the gas entrance hole 110.

Next, the outside air sucked into the sealed space 170 is measured through the sensor 160.

Then, when the application of current to the coil 130 is stopped, the magnetic field formed between the coil 130 and the flow plate 140 made of a magnetic material disappears. Therefore, the flow plate 140 moves downward to return to its original position, and is supported by the locking step 105. At this time, the volume of the space inside the chamber 100 is instantaneously reduced and the pressure is increased so that the internal air located in the closed space 170 through the gas entrance hole 110 is discharged to the outside.

Although the preferred embodiments of the present invention have been described in detail above, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Accordingly, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concept of the present invention as defined in the following claims also fall within the scope of the present invention.

As described above, the present invention can provide a miniaturized integrated gas measuring apparatus including a pump capable of actively inducing air flow, a measuring chamber and a sensor.

In addition, the present invention can increase the gas detection speed of the sensor by actively inhaling and discharging the air to be measured, and a fast recovery operation for the next operation is possible.

In addition, the present invention is provided with a separate separate chamber for measurement, it is possible to measure a stable and accurate gas without being affected by the surrounding environment of the chamber.

In addition, the present invention is because the gas entrance hole is formed on the outer circumferential surface of the chamber, the gas to be sucked or discharged does not directly affect the sensor disposed on the bottom surface, it is effective to protect the sensor sensitive to the flow of gas There is.

Claims (17)

A chamber having a plurality of gas access holes in the lower portion; A flow plate elastically supported by a spring in the chamber; A magnet installed vertically to protrude upward from a central portion of the flow plate; A coil positioned on an outer circumferential surface of the magnet and protruding downward from a circuit board formed in an area excluding a magnet transfer path of an upper surface of the chamber; And A sensor disposed on the bottom surface of the chamber; Gas measuring apparatus comprising a. The method of claim 1, The coil is a gas measuring device, characterized in that formed in a cylindrical shape surrounding the outer peripheral surface of the magnet. The method of claim 1, The coil is a gas measuring device, characterized in that formed in plural at equal intervals along the outer peripheral surface of the magnet. The method of claim 1, The upper surface of the chamber corresponding to the position of the magnet is protruded upwards to enable the upper flow of the magnet. The method of claim 1, The chamber is a gas measuring device, characterized in that the locking step formed so as to span a portion of the outer peripheral portion of the flow plate on the inner peripheral surface of the position higher than the gas entrance hole. The method of claim 5, The locking jaw, the gas measuring device, characterized in that a plurality of protrusions are uniformly protruded along the inner circumferential surface of the chamber, or projections of uniform height are formed at equal intervals. The method of claim 1, The coil is a gas measuring device, characterized in that by applying an external power source generates an electromagnetic force in the gap with the magnet located inside so that the magnet is vertically transferred in the coil. The method of claim 1, The chamber has a gas opening, the opening is formed in the lower portion, characterized in that coupled to the lower plate sealing the opening. The method of claim 1, The chamber is a gas measuring device, characterized in that formed in a cylindrical shape. The method of claim 1, The sensor is a gas measurement device, characterized in that the production using an optical waveguide. A chamber having a plurality of gas access holes in the lower portion; A fluid plate elastically supported by a spring in the chamber and made of a magnetic material; A coil protruding downward on a lower surface of the circuit board formed on the upper surface of the chamber; And And a sensor disposed on the bottom surface of the chamber. The method of claim 11, And at least one coil is formed to protrude from the lower surface of the circuit board toward the flow plate. The method of claim 11, The chamber is a gas measuring device, characterized in that the locking step formed so as to span a portion of the outer peripheral portion of the flow plate on the inner peripheral surface of the position higher than the gas entrance hole. The method of claim 13, The locking jaw, the gas measuring device, characterized in that a plurality of protrusions are uniformly protruded along the inner circumferential surface of the chamber, or projections of uniform height are formed at equal intervals. The method of claim 11, The chamber has a gas opening, the opening is formed in the lower portion, characterized in that coupled to the lower plate sealing the opening. The method of claim 11, The chamber is a gas measuring device, characterized in that formed in a cylindrical shape. The method of claim 11, The sensor is a gas measurement device, characterized in that the production using an optical waveguide.

Images