Arrangement structure and arrangement method of sensor

Abstract

To provide a sensor arrangement structure capable of determining occurrence of condensation on an earthen floor with a simple configuration.SOLUTION: A sensor arrangement structure (3) is for arranging sensors to determine occurrence of condensation on an earthen floor (23) in a non-air-conditioned building. The sensor arrangement structure (3) includes a crack inducing joint (30) formed in the earthen floor (23) to induce cracks, and a sensor (40) arranged in the crack inducing joint (30).SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a sensor arrangement structure and method, and more particularly to an arrangement structure and method for arranging sensors to determine the occurrence of condensation on an earthen floor in a non-air-conditioned building. [Background technology]

[0002] Condensation on concrete floors is a problem in non-air-conditioned buildings such as warehouses. Condensation on floors occurs when the surface temperature (floor temperature) of the floor falls below the dew point temperature of the air. It often occurs under weather conditions where the outside temperature and absolute humidity change (rise) suddenly after a period of low outside air temperatures. Usually, measures begin to be taken when condensation is confirmed by visual inspection, but measures are taken too late, and there is a risk of damage such as stored items getting wet or rusting or mold growing.

[0003] Therefore, it is possible to measure the surface temperature of parts of a building that are prone to becoming cold, and if the surface temperature is below the dew point temperature, it is possible to determine that there is a high risk of condensation on the earthen floor. In such cases, a surface temperature sensor is used to measure the surface temperature of parts that are prone to becoming cold. Also, a water leakage sensor is used to determine whether condensation has actually occurred on the earthen floor. In order to measure the occurrence of condensation water with a water leakage sensor, it is necessary to install the water leakage sensor in the location where condensation actually occurs.

[0004] On the other hand, cutter joints made by a concrete cutter are provided on the earthen floor as induction joints for controlling the positions of cracks. JP 2008-38360 A (Patent Document 1) is an example of a document disclosing such a technique.

[0005] Patent Document 1 discloses a structure in which mortar is embedded in crack-inducing joints in concrete structures such as floors, concentrating cracks in the mortar area due to the difference in drying shrinkage rates between the concrete and mortar, while at the same time making the presence of the joints less noticeable from the outside. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2008-38360 A Summary of the Invention [Problem to be solved by the invention]

[0007] Surface temperature sensors are generally installed near walls to avoid disruption to operations, but the temperature difference in a warehouse is so large that installing them near walls makes it impossible to accurately predict the occurrence of condensation. Therefore, in order to make an accurate prediction, it is necessary to measure the surface temperature of the earthen floor. Also, if a water leakage sensor is used, it is possible to measure whether condensation has actually occurred, but it must be installed in a location where condensation actually occurs.

[0008] Therefore, although both the surface temperature sensor and the water leakage sensor need to be installed on the dirt floor, it is difficult to install them on the dirt floor because it would cause problems when operating the facility.

[0009] On the other hand, in the induction joint structure of Patent Document 1, the crack induction joints are filled with mortar from the standpoint of design, and the crack induction joints are not utilized effectively.

[0010] The present invention has been made to solve the above-mentioned problems, and its object is to provide a sensor arrangement structure and arrangement method that is simple in configuration and can determine the occurrence of condensation on an earthen floor. [Means for solving the problem]

[0011] One embodiment of the present invention provides a sensor arrangement structure for determining the occurrence of condensation on an earthen floor in a non-air-conditioned building, the sensor arrangement structure comprising a crack induction joint formed in the earthen floor for inducing cracks, and a sensor arranged within the crack induction joint.

[0012] Preferably, the sensor includes a sensing portion and a cable portion connected to the sensing portion, the sensing portion and the cable portion extending along the crack inducing joint.

[0013] The sensing unit is desirably placed in a crack induction joint located below a group of stored items stored in a non-air-conditioned building.

[0014] Preferably, the sensor is a surface temperature sensor for measuring the surface temperature of the earthen floor, or a water leakage sensor for detecting the occurrence of condensation on the earthen floor.

[0015] Preferably, the crack inducing joint includes a bottom wall, a pair of side walls rising from both ends of the bottom wall, and an inclined wall connected to the upper ends of the pair of side walls and widening toward the surface of the earthen floor.

[0016] It is desirable that the sensor arrangement structure further includes a bottom raising member arranged between the bottom wall and the pair of side walls, and a guide portion arranged on the inclined wall and extending toward the sensor.

[0017] One embodiment of the present invention provides a sensor placement method for placing sensors to determine the occurrence of condensation on an earthen floor in a non-air-conditioned building, the method comprising the steps of providing a plurality of crack induction joints on the surface of the earthen floor, determining locations on the earthen floor for placing stored items, and placing sensors in the crack induction joints located below the locations for the stored items. Effect of the Invention

[0018] According to the sensor arrangement structure and arrangement method of the present invention, the occurrence of condensation on an earthen floor can be determined with a simple configuration. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a plan view showing an arrangement structure of sensors according to a first embodiment of the present invention. [Diagram 2] 2 is an enlarged view of a portion enclosed by a dashed dotted line in FIG. 1. [Diagram 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. [Figure 4] FIG. 3 is an enlarged view of a portion enclosed by a dashed dotted line in FIG. 1, showing an embodiment different from that in FIG. 2. [Diagram 5] 1(A) to 1(C) are diagrams illustrating the mechanism by which condensation occurs in general concrete. [Figure 6] FIG. 1 is a diagram showing the mechanism by which condensation occurs on an earthen floor. [Figure 7] 10A and 10B are diagrams showing a sensor arrangement structure according to a second embodiment of the present invention, where (A) is a diagram corresponding to FIG. 3, and (B) is an enlarged perspective view showing only a guide portion. [Figure 8] 11(A) to 11(D) are diagrams showing how to arrange the sensors. [Figure 9] FIG. 1 is a schematic cross-sectional view showing an indoor space of a typical building. [Figure 10] FIG. 1 is a schematic cross-sectional view showing an indoor space of a typical building. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference characters and their description will not be repeated.

[0021] First, prior to describing the sensor arrangement structure of this embodiment, a brief description will be given of condensation that occurs in non-air-conditioned buildings such as general factories, warehouses, and temporary facilities with reference to Figures 9 and 10.

[0022] The building 100 is typically a warehouse, and stores various kinds of goods in an indoor space 110. As shown in Fig. 9, the building 100 includes wall materials 121, 121, a ceiling material 122 supported by the wall materials 121, 121, a concrete floor 123 provided opposite the ceiling material 122, and a ventilation fan 124, which is a type of ventilation device, provided in the wall material 121. The ventilation fan 124 is normally operated at all times, and outside air is taken into the building 100. The wall material 121 and the ceiling material 122 separate the indoor space 110 and the outdoor space 111.

[0023] In such a building 100, during the rainy season when the outside air is humid, condensation may occur on the earthen floor 123 if the earthen floor 123 is at a low temperature. As described above, the concrete earthen floor 123 has a large heat capacity and changes in temperature slowly, so that if the temperature rises suddenly during the rainy season, the surface temperature of the earthen floor 123 may be lower than the outside air. In such a situation, if the outside air becomes humid due to rainfall or the like, humid air is drawn into the indoor space 110 by the ventilation fan 124, and condensation occurs on the low-temperature earthen floor 123.

[0024] 10, a large number of stored items 91 are stored at room temperature in an indoor space 110 of the building 100. The stored items 91 are piled up on an earthen floor 123, and are managed in a plurality of groups (sets). A group of the stored items 91 arranged in the indoor space 110 is referred to as a stored item group 9.

[0025] Gaps 90 are provided between adjacent stored object groups 9 in a plan view so that people can pass through. Gaps 90 represent gaps between adjacent stored objects 91 in the horizontal direction. In addition, since the stored objects 91 are not placed directly on the earthen floor 23 but on breathable pallets 92, a gap is also provided between the earthen floor 123 and the stored objects 91.

[0026] The place where condensation is most likely to occur on the floor 123 of such a building 100 is under the pallet 92, where wind does not easily pass through. As described above, the temperature of the floor 123 changes slowly, so the temperature of the floor 123 under the pallet 92 remains low. In contrast, moisture is widely diffused in the indoor space 110. Therefore, condensation occurs quickly on the floor 123 under the pallet 92.

[0027] The location of the sensor is important to determine the occurrence of condensation on the earthen floor 123. In this embodiment, the sensor for detecting the occurrence of condensation is placed in the crack inducing joint that is inevitably formed on the earthen floor. Such a sensor arrangement structure 3 will be described in detail below.

[0028] <Embodiment 1> A sensor arrangement structure 3 according to the present embodiment will be described with reference to Figures 1 to 6. The sensor arrangement structure 3 according to the present embodiment is arranged in a building 1 such as the above-mentioned warehouse.

[0029] As shown in Fig. 1, a building 1 in which a sensor arrangement structure 3 according to this embodiment is arranged is surrounded by multiple wall materials 21 and includes a ceiling material (not shown), multiple pillars 25 supporting the ceiling material, and a concrete floor 23 arranged opposite the ceiling material. Generally, cracks inevitably occur in concrete structures after construction, so "crack induction joints" are formed in order to manage the positions of the cracks.

[0030] In the earthen floor 23 of this embodiment, crack inducing joints 30 are also formed on its surface, an example of which is shown by the dashed line in FIG. 2. In the following description, the crack inducing joints are simply referred to as "joints." Although not shown in FIG. 1, it is assumed that the joints 30 are formed in each of the sections 26. In addition, the joints 30 do not necessarily have to be provided in each section 26, and may be formed over the entire surface of the earthen floor 23. In addition, the section 26 is an area surrounded by the pillars 25 or the wall material 21.

[0031] As shown in FIG. 2, the joint 30 includes a plurality of horizontal joints 30a and vertical joints 30b perpendicular to the horizontal joints 30a. The interval W1 between the horizontal joints 30a and the vertical joints 30b is preferably, for example, 2 m or more and 4 m or less. The interval W2 between the stored items 9 is, for example, in the range of 3 m square or more and 5 m square or less. Therefore, by setting the interval W1 between the horizontal joints 30a and the vertical joints 30b to, for example, 2 m or more and 4 m or less, it is possible to ensure that the joints 30 are always provided below the stored items 9 even if the stored items 9 is placed at an arbitrary location. In FIG. 2, the stored items 9 is shown with light ink, but the stored items 9 may be placed at an arbitrary location.

[0032] As shown in FIG. 3, the joint 30 is generally U-shaped in cross section and includes a bottom wall 31 and a pair of side walls 32 rising upward from both ends of the bottom wall 31. The width W3 of the joint 30 is 3 mm or more and 20 mm or less. If it is less than 3 mm, it is too thin to place the sensor 40. If it exceeds 20 mm, it is too wide for the width of the joint 30, making construction difficult. The depth D of the joint 30 is 10 mm or more and 40 mm or less. If it is less than 10 mm, the sensor 40 is too close to the surface of the earthen floor 23 and is exposed from the joint 30. If it exceeds 40 mm, condensation may occur inside the joint 30 after condensation occurs on the surface of the earthen floor 23.

[0033] The sensor 40 is a surface temperature sensor that measures the surface temperature of the earthen floor 23. Although the surface temperature sensor 40 cannot directly detect the occurrence of condensation on the earthen floor 23, the risk of condensation occurrence can be measured using the measurement value measured by the surface temperature sensor 40. Specifically, the risk of condensation can be determined based on the measurement value of the surface temperature sensor 40 and the measurement value of the dew point temperature sensor, based on whether or not the surface temperature is below the dew point temperature. From this perspective, the surface temperature sensor 40 can determine the occurrence of condensation on the earthen floor 23.

[0034] 2, the surface temperature sensor 40 includes a sensing unit 41 that acquires the surface temperature, a joint unit 43 connected to the sensor body, and a cable unit 42 having one end connected to the sensing unit 41 and the other end connected to the joint unit 43. A sensor joint 50 connected to the body of the surface temperature sensor 40 is attached to the pillar unit 25 in advance. The sensing unit 41 is installed in the joint 30, the cable unit 42 is aligned along the joint 30, and the joint unit 43 is connected to the sensor joint 50 provided on the nearest pillar unit 25. This makes it possible to measure the surface temperature of the earthen floor 23 beneath a group of stored items 9 installed at any location.

[0035] Since the surface temperature sensor 40 needs to be connected to the sensor body by wire, it is installed on the pillar 25 so as not to interfere with the operation of the facility. However, the dew point temperature in the warehouse 1 varies, and in order to predict the risk of condensation on the earthen floor 23, it is preferable to measure the surface temperature of the earthen floor 23. Furthermore, among the earthen floors 23, the earthen floor 23 below the stored items 9 has a high risk of condensation. Therefore, the surface temperature sensor 40 of this embodiment can arrange the sensing unit 41 and the cable unit 42 in the joint 30. As a result, by installing the surface temperature sensor 40 in the joint 30 located below the stored items 9, the risk of condensation on the earthen floor 23 can be accurately predicted.

[0036] As shown in FIG. 4, the sensor 40A may be a water leakage sensor that detects whether or not condensation has actually occurred on the earthen floor 23. The water leakage sensor 40A is a sensor for determining the occurrence of condensation, similar to the surface temperature sensor 40. The water leakage sensor 40A is composed of, for example, a pair of electrodes, and when water is detected, electricity is passed through the electrodes to change the resistance value, thereby measuring water leakage. The water leakage sensor 40A includes a sensing unit 41A having two electrodes, a display unit 45A that is installed on the pillar 25 and displays whether or not a water leakage has been detected, and a cable unit 42A having one end connected to the sensing unit 41A and the other end connected to the display unit 45A. The sensing unit 41A and the cable unit 42A are disposed in the joint 30.

[0037] The dew point temperature within the warehouse 1 varies, and the temperature of the floor 23 below the stored items 9 is lower than that of the floor 23 where the stored items 9 are not placed, so condensation occurs earlier below the stored items 9. Therefore, by installing the water leakage sensor 40A in the joint 30 located below the stored items 9, the occurrence of condensation on the floor 23 can be detected early.

[0038] The process by which condensation occurs in typical concrete will be described with reference to Figures 5(A) to (C). It is generally said that the lower the density of concrete and the more voids there are, the less likely condensation will become apparent. As shown in Figure 5(A), in a normal state where no condensation has occurred on the floor 23, no condensed water accumulates in the voids V in the concrete. When the floor 23 is exposed to humid air while remaining in a low temperature state, the voids V in the concrete are gradually filled with condensed water C1 as shown in Figure 5(B), and after all the voids V are filled with condensed water C, condensation appears on the surface of the floor 23 as shown in Figure 5(C).

[0039] In the concrete floor 23, a tool such as a trowel is used for pressing and finishing, so that the surface is dense but becomes coarse toward the inside (lower). Specifically, as shown in FIG. 6, there are few voids V at the surface and many voids V at the inside (lower). In particular, the concrete is coarse at the bottom wall 31 of the joint 30, and condensation water is difficult to become apparent. Therefore, even if condensation is apparent on the surface of the floor 23, condensation may not occur in the joint 30, and the water leakage sensor 40A arranged in the joint 30 may not detect it. In order to solve such problems, the sensor arrangement structure 3B according to the second embodiment has been invented.

[0040] <Embodiment 2> With reference to Figures 7(A) and 7(B), a sensor arrangement structure 3B according to embodiment 2 will be described. Figure 7(A) is a cross-sectional view of the sensor arrangement structure 3B according to the embodiment of the present invention, and Figure 7(B) is an enlarged perspective view showing only the guide portion.

[0041] The joint 30B in this embodiment includes a bottom wall 31B, a pair of side walls 32B rising from both ends of the bottom wall 31B, and an inclined wall 33B continuing to the upper ends of the pair of side walls 32B and widening toward the surface of the earthen floor 23. That is, in addition to the joint 30 in the first embodiment, a V-shaped inclined wall 33B is provided. A guide portion 34B is attached on the inclined wall 33B of the joint 30B to guide condensation water directly to the sensor.

[0042] As shown in FIG. 7B, the guide portion 34B includes a pair of inclined surfaces 35B along the inclined wall 33B, an opening 36B provided between the inclined surfaces 35B, and a pair of ends 37B connecting both ends of the pair of inclined surfaces 35B in the longitudinal direction. The guide portion 34B is a component made of, for example, aluminum. The inclined surface 35B of the guide portion 34B extends toward the bottom wall 31B side beyond the inclined wall 33B of the joint 30B. The lower end of the inclined surface 35B extends toward the water leakage sensor 40A and may abut against the water leakage sensor 40A. It is desirable that the guide portion 34B be shorter than the width direction length of the inclined wall 33B.

[0043] As shown in Fig. 7(A), a bottom-raising material 38B is disposed between the bottom wall 31B and the pair of side walls 32B of the joint 30B. The bottom-raising material 38B is, for example, a sponge. The sensor 40 is raised upward by the bottom-raising material 38B, so that the lower end of the inclined surface 35B of the guide portion 34B abuts against the sensor 40. Furthermore, by disposing the bottom-raising material 38B on the bottom wall 31B, it is possible to prevent the water leakage sensor 40A from directly abutting against the bottom wall 31B, which is made of coarse concrete.

[0044] The sensor arrangement structure 3B of this embodiment allows condensation water that has appeared on the surface of the earthen floor 23 to flow along the inclined surface 35B and the inclined surface 35B of the guide portion 34B and reach the water leakage sensor 40A, thereby enabling the appearance of condensation water on the earthen floor 23 to be accurately measured.

[0045] <Sensor placement method> Next, a method for disposing the surface temperature sensor 40 in a joint will be described with reference to FIG.

[0046] First, as shown in Fig. 8(A), a plurality of crack inducing joints 30 are provided on the surface of the earthen floor 23 of the building 1. In this case, it is preferable to provide more joints, specifically 1.5 times more joints, than would be provided for crack inducing joints 30 in a typical building 1. The joints 30 are formed, for example, by a concrete cutter or the like.

[0047] 8(B), a sensor joint 50 for connecting to the sensor main body of the surface temperature sensor 40 is provided on the building 1. In this embodiment, the sensor joint 50 of the surface temperature sensor 40 is attached to the pillar 25 of the building 1, but it may be attached to any location in the building 1, such as the wall material 21, as long as it is easy to connect to the main body of the surface temperature sensor 40.

[0048] As shown in Fig. 8(C), a location is determined for the group of stored items 9, where luggage is placed on the dirt floor 23. The location of the group of stored items 9 is determined in accordance with the operation of the building 1, but because there are more joints 30 than usual, no matter which location is selected, the joints 30 will be located below the location of the group of stored items 9.

[0049] Finally, as shown in Fig. 8(D), the sensing unit 41 of the surface temperature sensor 40 is placed in the joint 30 that is located below the location where the group of stored items 9 is arranged. Furthermore, the cable unit 42 is placed in the joint 30, and the joint unit 43 is connected to the sensor joint 50 that has been attached in advance to the column unit 25. This allows the sensing unit 41 of the surface temperature sensor 40 to be located below the location where the group of stored items 9 is arranged, without the cable unit 42 of the surface temperature sensor 40 getting in the way.

[0050] The process of providing the sensor joint 50 to the column portion 25 may be performed after the placement location of the storage items 9 has been determined.

[0051] In the above-mentioned sensor arrangement method, a method of arranging the surface temperature sensor 40 in a joint has been described, but the method of arranging the water leakage sensor 40A can be performed in a similar manner. Specifically, in the method of arranging the water leakage sensor 40A, after the joint 30 is created, the arrangement location of the stored items 90 is determined, and the sensing unit 41A and cable unit 42A of the water leakage sensor 40A are arranged in the joint 30 arranged below the arrangement location of the stored items 9, and then the display unit 45A is attached to the column part 25.

[0052] Although the sensor in the above embodiment has been described as being the surface temperature sensor 40 or the water leakage temperature sensor 40B, any sensor for determining the occurrence of condensation on the earthen floor 23 may be used.

[0053] Although the embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited to the illustrated embodiment. Various modifications and variations can be made to the illustrated embodiment within the same scope as the present invention or within an equivalent scope. [Explanation of symbols]

[0054] 1 Building, 3,3B Sensor layout structure, 9 Storage items, 23 Earthen floor, 30,30B Crack induction joint (joint), 31,31B Bottom wall, 32,32B Side wall, 33B Sloping wall, 34B Guide part, 35B Sloping surface, 36B Opening, 38B Bottom raising material, 40 Surface temperature sensor (sensor), 40A Water leakage sensor (sensor), 41,41A Sensing part, 42,42A Cable part, 100 Building, 123 Earthen floor.

Claims

1. A layout structure for arranging sensors to determine the occurrence of condensation on an earthen floor in a non-air-conditioned building, A crack inducing joint for inducing cracks formed in the earthen floor; A sensor arrangement structure comprising: a sensor arranged in the crack induction joint.

2. The sensor includes a sensing portion and a cable portion connected to the sensing portion, The sensor arrangement structure according to claim 1 , wherein the sensing portion and the cable portion extend along the crack inducing joint.

3. The sensor arrangement structure according to claim 2 , wherein the sensing unit is arranged in the crack induction joint located below a group of stored items stored in the non-air-conditioned building.

4. 4. The sensor arrangement structure according to claim 1, wherein the sensor is a surface temperature sensor for measuring the surface temperature of the earthen floor.

5. 4. The sensor arrangement structure according to claim 1, wherein the sensor is a water leakage sensor for detecting the occurrence of condensation on the earthen floor.

6. The sensor arrangement structure described in claim 5, wherein the crack induction joint includes a bottom wall, a pair of side walls rising from both ends of the bottom wall, and a sloping wall connected to the upper ends of the pair of side walls and widening toward the surface of the earthen floor.

7. A bottom raising member disposed between the bottom wall and the pair of side walls; The sensor arrangement structure according to claim 6 , further comprising a guide portion disposed on the inclined wall and extending toward the sensor.

8. A method for arranging sensors to determine the occurrence of condensation on an earthen floor in a non-air-conditioned building, comprising: Providing a plurality of crack inducing joints on the surface of the earthen floor; A step of determining a location for arranging a group of stored items on the earthen floor; A sensor placement method comprising a step of placing the sensor in the crack induction joint located below the placement location of the stored items.

Images