JP6156792B2 - measuring device - Google Patents

Description

  The present invention relates to a measuring apparatus, and for example, relates to a measuring apparatus that measures temperature, humidity, and the like that have a simple structure and stable measurement accuracy.

  In order to carry out accurate temperature observation, it is necessary to install a temperature sensor in the case or shelter to prevent the effects of direct sunlight. In addition, since this type of measuring device such as temperature is usually installed in a radiant environment such as solar radiation, the air temperature in the case and shelter is higher than the surrounding air during the day, and the case and Since the temperature of the air in the shelter is lower than the ambient air, ventilation and ventilation in the case and the shelter are required. A temperature measuring device equipped with a general shelter has a structure in which air is introduced from one side by a fan and discharged from the opposite side.

  Further, as a conventional temperature measuring device for measuring this type of temperature, there is a field server 10 for long-term humidity measurement, which includes a measurement chamber 11, an outside air suction chamber 12, an outside air intake preparatory chamber 13, and a hygroscopic chamber. When the electric fan 12a in the outside air suction chamber 12 rotates, the outside air is sucked from the two outside air intake holes 13c of the outside air intake preparatory chamber 13 and passes through the filter portion 14, The outside air is introduced into the measurement chamber 11, passes through the internal humidity sensor 11x and the internal temperature sensor 11y, is discharged to the outside through the outer peripheral gap of the upper lid 11r, and the airflow flows upward from below (for example, Patent Document 1).

JP 2008-64591 A

  By the way, in the air temperature measuring device having the above structure, the outside air introduced by the electric fan 12a is discharged from the outside air intake preparatory chamber 13 through the filter unit 14, the outside air suction chamber 12, and the measuring chamber 11 to the outside. However, there has been a problem that the apparatus cost becomes high. Further, since the outside air taken into the outside air taking-in preliminary chamber 13 is taken into the wide space from the two outside air taking holes 13c, 13c, the air inside the space is retained and the temperature distribution is not constant, There is a problem that the external airflow is not stable, which may affect the measurement accuracy of temperature and humidity.

  The present invention has been made in view of such problems, and the object of the present invention is to simplify the structure and reduce the cost, and to stabilize the air flow that flows in to ventilate the internal air of the case and the shelter. In addition, an object of the present invention is to provide a measuring apparatus in which a temperature distribution is constant in a space where a sensor or sensor sensing unit is installed, and measurement accuracy can be improved.

To achieve the above object, the measuring apparatus according to the present invention is to accommodate the sensing portion of Rousset capacitors to measure the temperature and humidity of the air at the top, for housing the fan for introducing air into the bottom to the feeling unit a measuring device comprising a case, wherein the case includes a plurality of openings for the air introduced into the outer surface, a plurality of intermediate communicating path communicating with said plurality of openings, an intermediate communication path of the plurality of merged has a merge space center, the opening of the air discharge opening to the bottom of the merging space, the front Symbol feeling unit is installed before Kigo flow space, or at the bottom of the merging space At the same time, the fan is disposed in the air discharge opening below the sensing part .

In the measuring apparatus of the present invention configured as described above, the air introduced from the plurality of openings that open to the outer surface of the case is mixed and stirred in the central merging space through the plurality of intermediate communication paths. . Sensitive part of the sensor is placed at the bottom of the space or merge space, a plurality of air flow is merged, merged by airflow passes through the sensing portion of the sensor, the case from the opening of the air discharge of the lower Since it is discharged outside, the distribution of the temperature and humidity of the merged air becomes a constant state, so that the temperature and humidity can be measured stably.

  Further, as a preferred specific aspect of the measuring apparatus according to the present invention, the fan is disposed adjacent to the downstream of the merge space of the plurality of communication paths, and discharges the air in the merge space to the outside of the case. It is characterized by being a suction type fan. According to this configuration, the air merged in the merge space through the plurality of communication paths communicating from the plurality of openings is discharged to the outside of the case by the suction type fan, and the air flow sucked from the openings is a laminar flow Since the flow is stable and is stirred uniformly in the merge space, accurate measurement can be performed.

  Furthermore, as another preferable specific aspect of the measuring apparatus according to the present invention, the cross-sectional area of the plurality of communication passages is gradually increased from the cross-sectional area of the plurality of openings to the cross-sectional area of the portion communicating with the merge space. It is characterized by being configured to be smaller. According to this configuration, the air introduced from the plurality of openings increases in flow rate through the plurality of communication passages, is stirred at high speed in the merge space, and measures the temperature and humidity of the stirred uniform air. Accuracy is stable.

  As a still further preferred embodiment of the measuring apparatus according to the present invention, the plurality of communication paths extend in a horizontal direction from the plurality of openings to the merge space. According to this structure, since the communicating path extended from the opening part which takes in external air extends in a horizontal direction, thickness reduction and size reduction of a case can be achieved.

  Moreover, it is preferable that the plurality of openings and the plurality of communication passages are formed in four, and are formed radially symmetrically on the outer peripheral side of the merge space. According to this configuration, outside air is taken in from openings in four directions, and the outside air is introduced into the merging space through the communication passages in four directions, so that the air flow is stable, well agitated, and accurate measurement is possible. It becomes.

  As another specific aspect, the case preferably includes a solar cell panel that supplies power to the sensor and the fan. With this configuration, the measurement apparatus can be installed in a place where there is no power source.

  As yet another specific aspect, it is preferable that the plurality of openings are configured to include a foreign matter entry preventing mesh. With this configuration, foreign matter can be prevented from entering the case, and accurate measurement can be performed over a long period of time.

  In the measuring apparatus of the present invention, the sensor for measuring temperature and humidity or the sensor's sensitive part is installed in a space where the air flows flowing in through a plurality of communication passages communicating with the plurality of openings merge to stabilize the air flow. Since it is agitated and becomes a uniform state, measurement accuracy such as temperature and humidity can be increased. Further, the configuration is simple, the cost can be reduced, and maintenance management becomes easy.

The top view of one Embodiment of the measuring device which concerns on this invention. The front view of FIG. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. BB sectional drawing of FIG. CC sectional view taken on the line of FIG. The vertical direction sectional view of other embodiments of the measuring device concerning the present invention. Sectional drawing of the state which decomposed | disassembled the measuring apparatus shown in FIGS. The schematic diagram for operation | movement description of the measuring apparatus shown in FIGS. The schematic diagram for operation | movement description of other embodiment of the measuring apparatus which concerns on this invention. The state which installed the measuring apparatus which concerns on this invention on the ground is shown, (a) is a side view, (b) is a top view, (c) is the principal part which removed the solar cell panel of (a) and was fixed to the attachment pillar. Side view. The horizontal direction sectional view of other embodiments of the measuring device concerning the present invention. The vertical direction sectional view of other embodiments of the measuring device concerning the present invention.

  Hereinafter, an embodiment of a measuring apparatus according to the present invention will be described in detail with reference to the drawings. 1 to 5 and FIGS. 7 and 8, the measuring device 1 includes a sensor 2 that measures the temperature (air temperature) and humidity of air, a case 10 that houses the sensor 2 or the sensor's sensitive part 2 a, and the sensor 2 or A fan 3 for introducing air into the sensitive part 2 a of the sensor 2 is provided, and the sensor 2 and the fan 3 are arranged in the case 10. The case 10 is composed of three members: an upper case 11 located at the upper part, an intermediate plate 15 located in the middle, and a lower case 20 located at the lower part. In the present embodiment, the case 10 made of three members is formed of a plastic molded product, but is not limited thereto.

  The upper case 11 has a shape of a lower opening in which the ridge is turned upside down, a square columnar through portion 12 is formed at the center, and a solar cell panel 13 is attached to a step portion on the upper surface. Further, the upper case 11 is formed with a connecting boss 14 for connecting the middle plate 15 and the lower case 20 so as to protrude downward. The middle plate 15 located in the middle has a circular disc shape on the outer periphery, and a square hole 16 through which the quadrangular columnar through portion 12 at the center of the upper case 11 is inserted is formed at the center. A through-hole 17 through which a connecting set screw is inserted is formed at a position corresponding to the connecting boss 14 of the upper case 11. On the outer periphery of the upper case 11, a step portion is formed in which the outer periphery of the intermediate plate 15 is fitted.

  The lower case 20 located below the upper case 11 and the middle plate 15 is formed in a substantially columnar shape, is set to the same outer diameter as the outer diameter of the upper case 11, and the outer peripheral surface is continuous between the upper case 11 and the lower case 20. It becomes the shape to do. An internal space is formed between the upper case 11 and the middle plate 15, and although not shown, a storage battery that stores the electric power generated by the solar cell panel 13, a control circuit, and the like are installed. In addition, a measuring unit of the sensor 2 such as a temperature sensor or a humidity sensor can be installed in the internal space.

  A plurality of air introduction openings 21, 21,... Are formed on the outer peripheral surface of the lower case 20, and in this embodiment, four openings having the same opening area are formed at intervals of 90 degrees. .. Are formed from the four air introduction openings 21, 21... Toward the center of the case. The communication paths 22, 22... Are formed radially at intervals of 90 degrees from the center of the lower case 20. A joining portion of the communication passages 22, 22... Serves as a joining space S, and the sensor 2 or the sensor sensing portion 2 a is installed in the joining space S. Various elements such as a thermocouple, a platinum resistor, and a thermistor can be used as the sensitive part of the sensor. In this way, the lower case 20 is formed with four openings 21, 21... And four communication paths 22, 22... Communicating with the openings on the outer surface of the case. 22 is formed in the part where it merges.

  The communication paths 22, 22... Are formed by wall surfaces 23, 23 (see FIG. 3) on both sides, a bottom surface 24 (see FIG. 4) on the lower side, and an intermediate plate 15 positioned above, and the bottom surface 24 gradually moves from the outer periphery toward the center side. The wall surfaces 23 on both sides are formed so as to be squeezed with an arc surface or a paraboloid surface from the outer peripheral side toward the center side. With this configuration, the communication passages 22, 22... Gradually move from the outer peripheral side toward the center from the outer peripheral side toward the center from the cross-sectional area of the air introduction openings 21, 21. It is formed to be smaller.

  The sensor 2 or the sensing part 2a of the sensor is installed in the merging space S where the plurality of communication passages 22, 22... Merge, or downstream of the merging space S. The merge space S is formed in the same quadrangular prism shape as the quadrangular prism-shaped through portion 12 at the center of the upper case 11, and both are formed as a communication space. The merge space S in the case 10 is divided into upper and lower parts, and the fan 3 is fixed below with screws or the like. The merge space S may be one in which the sensor 2 itself is installed. The fan 3 is a motor fan having a rectangular parallelepiped shape, and is configured such that an air flow is generated from the top to the bottom when the central impeller is rotated. An air discharge opening 27 is formed in the bottom surface 24 of the lower case 20 below the fan 3.

  Therefore, when the fan 3 is rotated, the air flowing in from the air introduction openings 21, 21... Passes through the communication passages 22, 22. It is configured to be discharged out of the case from the lower air discharge opening 27. Further, the merge space S is located adjacent to the upstream (windward) side of the fan 3. In other words, the fan 3 is downstream of the merge space S where the plurality of communication paths 22, 22. It is a suction type fan that is arranged adjacent to the leeward side and discharges the air in the merging space S to the outside of the case.

  The four air introduction openings 21, 21,... Are fitted with a mesh 25 for preventing foreign matter such as dust and insects from entering, and the mesh outer periphery is fitted in a groove formed around the opening 21. Fixed together. A mesh 26 for smoothly discharging the introduced air is mounted on the upper portion of the fan 3 located in the merge space S at the center of the case, and the sensor 2 is placed and fixed on the mesh 26. This mesh is placed and fixed on the top of the fan 3. The mesh 26 may be fastened with a set screw for fixing the fan 3.

  The sensor 2 for measuring temperature and humidity is installed as it is when it can be mounted in the merge space S as it is, and when the sensor is large and does not enter the merge space S, the sensor body is installed inside the case 10, for example. Only the sensor sensing part may be arranged in the merge space S. In the case of a commercially available sensor such as “Ondoritori”, if the sensor sensitive part is different, the sensor sensitive part is fixed in the merge space S inside the case 10, and the main body part is fixed outside the case 10. Temperature measurement or the like may be performed.

  In the present embodiment, the upper case 11, the middle plate 15, and the lower case 20 of the case 10 are coupled by four set screws. Specifically, a connecting boss 14 having a screw hole downward from the upper case 11 is formed, and a through hole 17 is formed in the middle plate 15 so as to face the connecting boss of the upper case 11. A connecting boss 28 having a through-hole is formed upward from the inclined bottom surface 24, and is screwed into the connecting boss 14 of the upper case 11 through the through-hole 17 of the intermediate plate 15 through the set screw from the lower connecting boss 28. It is the composition which is combined.

  The upper case 11 has a structure having a through-hole 12 at the center. However, in the measuring apparatus 1A shown in FIG. 6, the lower portion of the solar cell panel 13 is closed like the upper case 11A. The intermediate plate 15A located in the middle is formed in a disc shape having no through hole in the center, and the merge space S has a shape closed at the top. Also in this modified example, the air flow introduced from the plurality of openings 21, 21... For introducing air in four directions increases in flow velocity through the plurality of communication passages 22, 22. Since the air flow is agitated and the air flow is agitated, the temperature and humidity become uniform, and accurate measurement is possible.

  The operation of the measuring apparatus 1 of the present embodiment configured as described above will be described below. When the fan 3 located in the case 10 is rotated, the air flowing in from the four air introduction openings 21, 21... Located on the circumference flows into the four communication paths 22, as indicated by arrows Y 1 to Y 4. 22... Flows from four directions toward the center of the lower case 20, is accelerated because the cross-sectional area of the communication path gradually decreases from the inlet, and is merged in the merge space S in which the sensor 2 a of the center sensor 2 is installed. The The combined four air flows are stirred by being combined in the central space in the case 10, and the temperature and humidity of the air flow flowing in from the four directions are uniform in the space, and are sucked into the fan 3 and below. From the air discharge opening 27 as shown by arrows Y5 to Y7.

  The sensor 2 of the present embodiment has a built-in sensor sensing portion 2a, and the sensor sensing portion 2a is installed in the confluence space S in the center of the case 10 where the temperature and humidity are uniform. The measured air temperature and humidity are stable. When the measuring apparatus 1 is installed outdoors, the air flowing from the opening 21 on the side receiving solar radiation and the air flowing from the opening 21 on the opposite shade side are slightly higher on the solar radiation side. Also, when there is a wind and there is an air intake port on the leeward side and when there is an intake port on the leeward side, the air flow state in the space where the sensor's sensitive part is located is different and the measured value is different However, in this measuring apparatus 1, air of an equal flow rate is introduced from four directions on the outer periphery of the case 10, and the external airflow is obtained by merging and stirring in the space S where the sensor-sensitive part at the center is installed. As a result, the temperature and humidity can be measured stably. In addition, since the four openings 21, 21,..., And the four communication passages 22, 22, are formed to extend in the horizontal direction, the overall height of the case 10 can be reduced.

  Since the meshes 25, 25,... Are attached to the inlet portions of the air introduction openings 21, 21,... That open to the outer peripheral surface of the case 10, entry of foreign matter such as insects and dust into the case 10 can be prevented. . In addition, the joining space S where the sensor part of the sensor at the center of the case 10 is located is fitted with a mesh 26 at the boundary with the lower fan 3, and the joined air flow is out of the case 10 in a uniform state. Can be discharged. For this reason, an air flow flows uniformly around the sensor 2 fixed on the mesh 26, and a stable temperature measurement becomes possible.

  Moreover, since the measuring apparatus 1 of this embodiment has a small number of parts and a simple configuration as described above and can be easily assembled, the cost of the measuring apparatus can be reduced and maintenance management is facilitated. Furthermore, since it can be made small and light, it is easy to install equipment outdoors. Further, by providing the solar cell panel and the storage battery, installation in a place where there is no external power supply is possible.

  In the measuring apparatus 1 of the present invention, the electric power generated by the solar cell panel 13 mounted on the upper surface of the upper case 11 of the case 10 is stored in a storage battery (not shown) installed inside the case 10, It is used for the fan 3 and the sensor 2 that introduce air into the air. That is, the output of the sensor 2 and various sensors is displayed on a display device (not shown) by the power stored in the storage battery.

  As shown in the schematic diagram of FIG. 8, the air flow flows into the merge space S located at the center of the case from four directions as indicated by arrows Y1 to Y4, and merges in the merge space S, and the air flow is stirred. The Then, the stirred air flow is discharged downward by the fan 3 as indicated by arrows Y5 to Y7. The sensor 2 shown in FIG. 8 includes a sensor sensing portion 2a inside the slit portion of the main body case, and the air in the merge space S is stirred by the fan 3 so that the temperature and humidity are uniform. Therefore, accurate and stable measurement is possible. Measurement data can be read and measured on the display unit of the main body case.

  A temperature sensor 30 shown in FIG. 9 is a commercially available general small temperature sensor of a type in which the sensor sensing part is extended from the main body case, and the sensor sensing part 32 is extended from the main body part 31. In the temperature sensor shown in this example, the sensor sensing unit 32 is installed in the merge space S, and the temperature can be measured by reading the display unit of the main body unit 31 outside the case 10.

  When the temperature sensor 2 itself is small and can be accommodated in a space where a plurality of communication passages merge, the small temperature sensor is accommodated in the merge space S and a measured value such as temperature is read from the outside. You may comprise. In this case, for example, the temperature sensor display unit is accommodated in the merged space facing upward, and a window such as transparent glass is formed in place of the solar cell panel, thereby reading the measured and displayed temperature from the outside. Can do. Further, the sensor 2 can transmit measurement data wirelessly, and can be used as a data logger by being configured to read the measurement data with an external receiver.

  When the measuring apparatus 1 of the present embodiment configured as described above is installed in, for example, a farm field, the measuring apparatus 1 is attached to an attachment apparatus 40 placed on the ground as shown in FIG. Specifically, a U-shaped pedestal 42 in plan view is fixed at an intermediate position of the support column 41, and the measuring apparatus 1 is fixed on the pedestal as shown in FIG. At this time, the solar cell panel 13 fixed to the upper part of the measuring device 1 can be removed from the case 10 and tilted toward the south surface and fixed as shown in FIG.

  Another embodiment of the measuring apparatus according to the present invention will be described in detail with reference to FIG. FIG. 11 is a horizontal sectional view of another embodiment of the measuring apparatus according to the present invention. This embodiment is different from the above-described embodiment in that the shape of the fan is different and the shapes of the plurality of communication paths are different. Other substantially equivalent configurations are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the measuring apparatus 1 of the above-described embodiment, the fan 3 has a flat rectangular parallelepiped shape, but in the measuring apparatus 1B of this embodiment, the fan 3A has a flat cylindrical shape. In accordance with the cylindrical fan 3A, the shape of the upper merge space SA is also formed in a cylindrical shape. Moreover, the shape of the four communicating paths formed radially is such that the surfaces constituting the wall surface 23 are linear.

  Also in the measuring apparatus 1B of this embodiment, four openings 21, 21,... Are provided on the outer surface of the case, and the four communication paths 22, 22... Communicate with the openings, and the communication paths 22, 22. Since the merging portion is a merging space and is formed so that the cross-sectional area gradually decreases from the inlet opening 21 to the outlet merging space SA, the outside air flowing in from the opening flows into four air streams Y1 to Y1. Y4 is accelerated, merged in the central merge space SA, and stirred, so that the temperature and humidity are uniform. As a result, the temperature and humidity measured based on the sensor sensing part placed in the merging space SA have high measurement accuracy and can be stably measured.

  Next, still another embodiment of the measuring apparatus according to the present invention will be described with reference to FIG. In the measurement apparatus 1C shown in this embodiment, the position of the fan 3 that introduces air into the sensor 2 or the sensor sensing part 2a is located below the case 10 as compared with the two embodiments described above. This is characterized in that a confluence space where the communication passages of the two are merged is widely formed, and the sensor 2 or the sensor sensing portion 2a is located downstream of the confluence space. That is, the fan 3 is disposed adjacent to the downstream of the merge space SB of the plurality of communication passages 22, 22.

  In the measuring apparatus 1C of this embodiment, the airflows that flow in from the four directions indicated by the arrows Y1 to Y4 through the communication passages 22, 22, are joined together in the joining space SB. The airflows facing each other out of the airflow collide at the center and are stirred, and then sucked downward, and there is also an airflow sucked directly, so that the stirring becomes uniform. In this merging space SB, the position of the fan 3 is below and the distance in the vertical direction is set large. Therefore, after the air flow introduced from the four directions is stirred, it is bent downward, and the air flow is downstream. Is more agitated, and the combined state becomes more uniform. And since the sensor 2 or the sensing part 2a of the sensor is located on the downstream side of the merge space SB, the temperature and humidity on the downstream side of the uniform merge space SB are measured, so that more stable measurement is possible. It becomes.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various designs can be made without departing from the spirit of the present invention described in the claims. It can be changed. For example, in the above-described embodiment, the case structure includes the upper case 11, the middle plate 15, and the lower case 20, but the present invention is not limited to this. Of course, the above structure may be adopted.

  Although the example of four communicating paths was shown as a plurality of communicating paths which introduce air into merging space S with fan 3, it is not restricted to this, Three communicating paths may be sufficient, and five or more communicating paths are included. It may be used. Alternatively, the entire periphery of the outer peripheral surface of the case 10 may be an opening, and the upper case and the lower case may be connected by a plurality of pillars to form a communication path that communicates from substantially the entire outer periphery to the confluence space in the center. Furthermore, although the example of the shape where a cross-sectional area reduces gradually from the opening of an inlet_port | entrance to the opening of a confluence | merging space was shown for the shape of a some communication path, you may use the straight communication path which a cross-sectional area does not change.

  Although an example made of plastic is shown as the case, it may be a case made of a plurality of metal members or other materials, or a case using a plurality of members made of metal and plastic. Moreover, although the example which formed the several opening part and the several communication path in the lower case was shown, it is not restricted to this, You may make it form in another case member.

  As an application example of the present invention, this measuring device can be used to measure weather conditions such as temperature and humidity, and it can be used for environmental measurement by attaching a sensor that measures the gas concentration and gas components in the air. Is also applicable.

  1, 1A, 1B, 1C: measuring device, 2: sensor, 2a: sensor sensitive part, 3: fan, 10: case, 11: upper case, 13: solar panel, 15: middle plate, 20: lower case , 21: plural openings, 22: plural communication paths, 25, 26: mesh, S, SA, SB: confluence space, 30: sensor, 32: sensor sensitive part

Claims (7)

It accommodates the sensitive portion of Rousset capacitors to measure the temperature and humidity of the air at the top, a measuring device comprising a case containing a fan for introducing air into the bottom to the sense unit,
The case includes a plurality of openings for the air introduced into the outer surface, a plurality of intermediate communicating path communicating with said plurality of openings, and the merging space of the center to join the middle of the communication path of the plurality, the merging An opening for discharging air that opens at the bottom of the space ,
Before SL sensitive part, before Kigo flow space, or while being installed at the bottom of the merging space,
The fan is disposed in the air discharge opening below the sensing part .   The said fan is a suction type fan arrange | positioned adjacent to the downstream of the confluence | merging space of these communication paths, and exhausting the air of the said confluence | merging space to the exterior of the said case. Measuring device.   3. The cross-sectional area of the plurality of communication passages is configured to be gradually reduced from a cross-sectional area of the plurality of openings to a cross-sectional area of a portion communicating with the merge space. The measuring device described. Wherein the plurality of communication passage, measuring device according to any one of claims 1 to 3, characterized in that horizontally extending from the plurality of openings to said merge space. Wherein the plurality of openings, and the plurality of communicating passages are four forms, according to any one of claims 1 to 4, characterized in that it is formed symmetrically radially outer peripheral side of the merging space Measuring device. Wherein the case, the measurement device according to any one of claims 1 5, characterized in that it comprises a solar panel to supply power to the sensor and the fan. Wherein the plurality of openings, measuring device according to any one of claims 1 6, characterized in that it comprises a mesh for foreign matter intrusion preventing.

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