JP2018109926A - Building material selecting device, building material selecting method, program, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a building material selecting device with high design flexibility and capable of selecting an appropriate building material with sufficient consideration of reflected light in a building material used in a roof and the like.SOLUTION: A building material selecting device 1 is a computer for selecting a building material used in a building, and includes a control unit 10. The control unit 10 comprises a light-receiving condition setting unit 11, a reflection surface condition setting unit 12, a reflection angle calculating unit 13, a date and time condition setting unit 14, an external condition setting unit 15, a direct sunlight intensity calculating unit 16, an incident angle calculating unit 17, a luminance threshold value setting unit 18, a reflection characteristic threshold value calculating unit 19, a reflection characteristic minimum value determining unit 20, and a material selecting unit 21. The control unit is configured to be able to implement a function of each of the above elements by appropriately reading a program stored in a storage unit 30 for execution.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a building material selection device, a building material selection method, a program, and a recording medium, and more particularly, a building material selection device, a building material selection method, and a program for executing the method for selecting a building material used for a roof, an outer wall, or an inner wall of a building, And a recording medium for storing the program.

  Conventionally, in order to mitigate the heat island phenomenon, measures to prevent heat storage in the building itself and measures to efficiently use energy in the lighting, air conditioning equipment, and electrical / electronic equipment in the building have been studied and implemented. ing. For example, a roof material with a highly reflective paint applied to the roof of a building, or a composite glass material such as heat-reflective glass or Low-E glass is used on the outer wall (building) of the building, so By reducing the amount of heat transferred to the house and restraining the rise in room temperature, the use of natural energy is effectively reduced while reducing electric energy consumption in summer and the like, thereby reducing the environmental burden. In recent years, more and more buildings have been built from a design viewpoint while using energy-saving building materials that reflect sunlight.

However, when roof materials and outer walls that reflect sunlight with high reflectivity are used, the reflected light reflected by the roof materials and outer walls is visually recognized by neighboring residents, passers-by, automobile drivers, etc. There are many cases that are dazzling or troublesome and cause problems. Regarding such a problem, as a method of selecting the plate glass used for the outer wall of the building, input the shape data of the outer wall of the building, the optical characteristic data of the plate glass used for the wall surface of the building, the calculation target time, etc. The solar radiation reflection simulation which calculates | requires the reflection angle of sunlight of the plate glass used for glass and the position of sunlight reflection, and calculates | requires the total amount of reflected solar radiation (W / m < ² >) is proposed (for example, patent document 1). .

JP 2001-155502 A

  However, in the above-mentioned Patent Document 1, it is only to estimate the thermal influence of the reflected light on the building periphery by paying attention to the outer wall of the building, particularly the plate glass, and it is disclosed to select a roof material that is likely to generate reflected light. It has not been. In addition, the directivity of reflected light varies depending on the properties of the reflective surface, and this directivity affects the amount of reflected solar radiation. Is required to do. Furthermore, since the threshold value of the amount of reflected solar radiation can vary depending on the environment of the light receiving position of the reflected light, for example, what kind of building portion exists at the light receiving position, a design freedom in building material selection is desired.

  An object of the present invention is to select an appropriate building material in consideration of reflected light from a building material used for a roof or the like, and to have a high degree of design freedom, a building material selection device, a building material selection method, a program, and a record To provide a medium.

  In order to achieve the above object, a building material selection device according to the present invention is a building material selection device for selecting a building material to be used in a building, and sets a light receiving condition indicating a light receiving position of reflected light generated by the reflecting surface of the building material. A light receiving condition setting unit, a reflecting surface condition setting unit for setting a reflecting surface condition including an angle and a direction of the reflecting surface, and a reflection angle from a reflecting surface satisfying the reflecting surface condition to a light receiving position satisfying the light receiving condition. A reflection angle calculation unit to calculate, a date and time condition setting unit to set date and time conditions, an external condition setting unit to set external conditions including the latitude and longitude of the building, and weather conditions in the latitude and longitude of the building, and Based on the date and time conditions and the external conditions, the solar position in the latitude and longitude of the building and the direct sunlight intensity calculating unit for calculating the intensity of direct sunlight, and based on the solar position An incident angle calculation unit that calculates an incident angle of the sunlight to the reflection surface, a luminance threshold setting unit that sets a threshold value of the luminance of the reflected light, the reflection angle, the intensity and the incident angle of the direct sunlight, and A reflection characteristic threshold value calculation unit that calculates a reflection characteristic threshold value on the reflection surface of the direct sunlight based on the luminance threshold value of the reflected light; and a reflection characteristic minimum value determination unit that determines a minimum value of the reflection characteristic threshold value; It is characterized by providing.

  Further, the building material selection device compares the maximum value of the reflection characteristic threshold value with reflection direction characteristic information indicating the reflection direction characteristic for each material of the building material acquired in advance, and selects the material for the reflection surface. A selection unit is further provided.

  In order to achieve the above object, a building material selection device according to the present invention is a building material selection device for selecting a building material to be used in a building, and includes a material setting unit for setting the material of the building material and a reflective surface of the building material. From the light receiving condition setting unit for setting the light receiving condition indicating the light receiving position of the generated reflected light, the reflecting surface condition setting unit for setting the reflecting surface condition including the angle and direction of the reflecting surface, and the reflecting surface satisfying the reflecting surface condition A reflection angle calculation unit that calculates a reflection angle of reflected light to a light receiving position that satisfies a light reception condition, a date and time condition setting unit that sets a date and time condition, the latitude and longitude of the building, and the weather condition at the latitude and longitude of the building An external condition setting unit for setting an external condition including: a direct position for calculating the solar position and the intensity of direct sunlight on the latitude and longitude of the building based on the date and time condition and the external condition A light intensity calculator, an incident angle calculator that calculates an incident angle of the direct sunlight on the reflecting surface based on the sun position, the reflection angle, the intensity of the direct sunlight, and the incident angle; A reflection surface luminance calculation unit that calculates the luminance of the reflection surface viewed from a light receiving position, and a luminance maximum value determination unit that determines a maximum value of the luminance of the reflection surface.

  Moreover, the said material setting part sets the material of the reflective surface in the said building material based on the reflection directional characteristic information which shows the reflection directional characteristic for every material of the said building material acquired previously.

  Further, the building material selection device includes a luminance threshold setting unit that sets a threshold value of the reflected light, and whether or not the annual maximum value of the luminance of the reflecting surface is equal to or less than the threshold value of the reflected light. And a luminance determining unit for determining

  In order to achieve the above object, a building material selection method of the present invention is a building material selection method for selecting a building material to be used for a building, which is executed by a computer, and a light receiving position of reflected light generated by a reflecting surface of the building material. A light receiving condition setting step for setting a light receiving condition to be indicated, a reflecting surface condition setting step for setting a reflecting surface condition including an angle and a direction of the reflecting surface, and a light receiving position satisfying the light receiving condition from a reflecting surface satisfying the reflecting surface condition A reflection angle calculating step for calculating a reflection angle to the object, a date and time condition setting step for setting a date and time condition, and an external condition including a latitude and longitude of the building and an external condition including a weather condition in the latitude and longitude of the building Based on the setting step, the date and time condition and the external condition, the solar position and the intensity of direct sunlight at the latitude and longitude of the building A direct sunlight intensity calculating step for calculating; an incident angle calculating step for calculating an incident angle of the direct sunlight on the reflecting surface based on the sun position; and a luminance threshold setting step for setting a threshold value of the luminance of the reflected light; A reflection characteristic threshold value calculating step for calculating a reflection characteristic threshold value on the reflection surface of the direct sunlight based on the reflection angle, the intensity and the incident angle of the direct sunlight, and the luminance threshold value of the reflected light; and And a reflection characteristic minimum value determining step for determining a minimum value of the reflection characteristic threshold value.

  In order to achieve the above object, a building material selection method of the present invention is a building material selection method for selecting a building material used for a building, which is executed by a computer, and a material setting step for setting a material of the building material, A light receiving condition setting step for setting a light receiving condition indicating a light receiving position of reflected light generated by the reflecting surface of the building material, a reflecting surface condition setting step for setting a reflecting surface condition including an angle and a direction of the reflecting surface, and the reflecting surface condition A reflection angle calculation step for calculating a reflection angle of reflected light from a reflection surface satisfying the light reception condition to the light receiving position satisfying the light reception condition, a date and time condition setting step for setting a date and time condition, the latitude and longitude of the building, and the building An external condition setting step for setting external conditions including weather conditions in latitude and longitude, and the building based on the date and time conditions and the external conditions A direct sunlight intensity calculating step for calculating the solar position and the intensity of direct sunlight at the latitude and longitude, an incident angle calculating step for calculating an incident angle of the direct sunlight on the reflecting surface based on the solar position, and the reflection A reflection surface luminance calculation step for calculating the luminance of the reflection surface viewed from the light receiving position based on the angle, the intensity of the direct sunlight, and the incident angle; and a luminance maximum value for determining a maximum value of the luminance of the reflection surface And a determining step.

  In order to achieve the above object, a program of the present invention is a program recorded on a computer-readable recording medium, which causes a computer to execute a building material selection method for selecting a building material to be used in a building. A light receiving condition setting step for setting a light receiving condition indicating a light receiving position of reflected light generated by the surface, a reflecting surface condition setting step for setting a reflecting surface condition including an angle and a direction of the reflecting surface, and a reflection that satisfies the reflecting surface condition A reflection angle calculating step for calculating a reflection angle from a surface to a light receiving position satisfying the light receiving condition, a date and time condition setting step for setting a date and time condition, the latitude and longitude of the building, and the weather condition at the latitude and longitude of the building An external condition setting step for setting an external condition including: the building based on the date and time condition and the external condition A direct sunlight intensity calculating step for calculating the solar position and the intensity of direct sunlight at latitude and longitude; an incident angle calculating step for calculating an incident angle of the direct sunlight on the reflecting surface based on the solar position; and the reflected light A threshold value setting step for setting a threshold value of brightness, a reflection characteristic of the direct sunlight on the reflecting surface based on the reflection angle, the intensity and incident angle of the direct sunlight, and the brightness threshold value of the reflected light A reflection characteristic threshold value calculating step for calculating a threshold value; and a reflection characteristic minimum value determining step for determining a minimum value of the reflection characteristic threshold value.

  In order to achieve the above object, a program according to the present invention is a program recorded on a computer-readable recording medium that causes a computer to execute a building material selection method for selecting a building material to be used in a building. A material setting step, a light receiving condition setting step for setting a light receiving condition indicating a light receiving position of reflected light generated by the reflecting surface of the building material, and a reflecting surface for setting a reflecting surface condition including an angle and a direction of the reflecting surface A condition setting step, a reflection angle calculation step for calculating a reflection angle of reflected light from a reflection surface satisfying the reflection surface condition to a light receiving position satisfying the light reception condition, a date condition setting step for setting a date condition, and the building External condition setting step for setting external conditions including weather conditions in the latitude and longitude of the building and the latitude and longitude of the building Direct sunlight intensity calculating step for calculating the solar position at the latitude and longitude of the building and the intensity of direct sunlight based on the date and time conditions and the external condition, and to the reflecting surface of the direct sunlight based on the solar position An incident angle calculating step for calculating the incident angle, and a reflecting surface luminance calculating step for calculating the luminance of the reflecting surface viewed from the light receiving position based on the reflection angle, the intensity of the direct sunlight, and the incident angle; A luminance maximum value determining step for determining a maximum value of the luminance of the reflection surface.

  Furthermore, a computer-readable recording medium in which the program is recorded is provided.

  ADVANTAGE OF THE INVENTION According to this invention, while considering the reflected light in the building materials used for a roof etc. fully, an appropriate building material selection can be performed and the freedom degree of design can be made high.

It is a block diagram showing roughly the composition of the building material selection device concerning a 1st embodiment of the present invention. It is a schematic diagram which shows the relationship between the building to which the building material selection process performed with the building material selection apparatus of FIG. 1 is applied, and a light reception position. It is a graph which shows an example of the reflection directivity characteristic data of the reflective surface used by building material selection processing. It is a flowchart of the building material selection process performed with the building material selection apparatus of FIG. It is a flowchart which shows the modification of the building material selection process of FIG. It is a block diagram which shows roughly the structure of the building material selection apparatus which concerns on 2nd Embodiment of this invention. It is a flowchart of the building material selection process performed with the building material selection apparatus of FIG. It is a flowchart which shows the modification of the building material selection process of FIG.

Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram schematically showing the configuration of the building material selection device according to the first embodiment. The configuration of FIG. 1 shows an example thereof, and the configuration to which the building material selection apparatus according to the present invention is applied is not limited to that of FIG.

  1 is a computer that selects a building material to be used for a building that is planned or under construction, and includes a control unit 10, a storage unit 30, a communication I / F 41, an input unit 42, and an output unit. 43 and the display part 44 are comprised. The building material selection apparatus 1 is configured to be able to select a building material such as a roof, an outer wall, or an inner wall that can form a sunlight reflecting surface.

  The control unit 10 is configured by a CPU (Central Processing Unit) or MPU (Micro-Processing Unit) processor. The control unit 10 includes a light receiving condition setting unit 11, a reflecting surface condition setting unit 12, a reflection angle calculation unit 13, a date and time condition setting unit 14, an external condition setting unit 15, a direct sunlight intensity calculation unit 16, an incident angle calculation unit 17, and a luminance. Each of the above-mentioned elements includes a threshold setting unit 18, a reflection characteristic threshold calculation unit 19, a reflection characteristic minimum value determination unit 20, and a material selection unit 21, and appropriately reads and executes a program stored in the storage unit 30. The function is configured to be realized. Details of each function executed by each element of the control unit 10 will be described later.

  The storage unit 30 stores programs and data necessary for the control unit 10 to execute processing. The storage unit 30 is configured of a non-transitory and computer-readable storage medium. The storage unit 30 stores a light reception condition parameter group 31, a reflection surface condition parameter group 32, an external condition parameter group 33, a brightness threshold parameter group 34, and the like, and also stores reflection directivity characteristic data 35.

  The light reception condition parameter group 31 is data indicating the light reception position of the reflected light on the building material of the building, and a light reception condition described later is set based on the data. As shown in FIG. 2, the light receiving position A1 is usually determined by the latitude and longitude of the surrounding area of the building B, and the light receiving position A2 corresponding to the upper floor of the building is determined by the latitude, longitude, and altitude. The light reception condition parameter group 31 may be data based on map information acquired from an external device.

  The reflecting surface condition parameter group 32 is data including the angle and direction of the reflecting surface D in the building material C used for the roof, and reflecting surface conditions described later are set based on the data. In addition to the roof, the reflection surface condition parameter group 32 may include data including the angle and direction of the reflection surface of each building material such as an outer wall and an inner wall.

  The external condition parameter group 33 is data including the latitude and longitude of the building B and the weather conditions at the latitude and longitude of the building B, and external conditions to be described later are set based on the data. The external condition parameter group 33 may be data acquired from a database of the Japan Meteorological Agency via the Internet.

  The luminance threshold parameter group 34 is data indicating the threshold value of the luminance of the reflected light determined based on the environment in the surrounding area of the building B and the like. The environment in the surrounding area indicates, for example, what kind of building part or person exists at the light receiving point.

  The reflection directivity characteristic data 35 is data (reflection directivity characteristic information) indicating the reflection directivity characteristics of various materials, and each material is associated with the reflection directivity characteristics when the material is used as a reflection surface. The reflection directivity characteristic is a reflectance per unit solid angle for each reflection angle of −90 degrees to 90 degrees as shown in FIG. 3 and is shown for each incident angle. The reflection directivity characteristic can also be indicated by the luminance for each reflection of −90 degrees to 90 degrees with respect to the illuminance of the reflecting surface of incident light. The reflection directivity characteristic data 35 includes data indicating the reflection directivity characteristics of the reflection surface when various materials are applied to the reflection surface, and the reflection directivity of the reflection surface when various shapes are applied to the reflection surface. Data indicating characteristics can be included.

  FIG. 4 is a flowchart of the building material selection process executed by the building material selection apparatus 1 of FIG. In this flowchart, a process for selecting a building material to be used for the roof of a building scheduled for construction will be described as an example. The main building material selection process is executed by the control unit 10, and various data stored in the storage unit 30 is read according to each step of the main process.

  First, the light receiving condition indicating the light receiving position of the reflected light generated by the reflecting surface of the roof is set, and the reflecting surface condition including the angle and direction of the reflecting surface is set, and the light receiving from the reflecting surface satisfying the reflecting surface condition is set. The reflection angle to the light receiving position that satisfies the condition is calculated (step S11). Specifically, the latitude, longitude and altitude indicating the light receiving position of the reflected light generated by the reflecting surface of the building material used for the roof are set, and the angle and direction of the reflecting surface are set, and the set angle and direction are set. The reflection angle from the reflection surface to the light receiving position of the set latitude, longitude and altitude is calculated.

  Next, date and time conditions are set in consideration of changes in the orbit of the sun throughout the year (step S12). The date and time may be set as date and time, such as “00, 00, 00, 0:00 am”, or for each season of spring, summer, autumn and winter, or monthly. Good.

  Then, external conditions including the latitude and longitude of the building and the weather conditions at the latitude and longitude of the building are set. Based on the date and time condition and the external condition, the solar position and the direct sunlight of the building The intensity is calculated (step S13). For example, the latitude and longitude of the building are set as “north latitude 00 degrees, east longitude XX degrees”, and the atmospheric transmittance is set as external conditions. When calculating not only direct sunlight but also diffuse sunlight, the weather conditions at the latitude and longitude of the building are, for example, “sunny” (the amount of clouds covering the whole sky is 20% to 80%), “cloudy” (entire sky) And the weather conditions are added to the external conditions. Then, the solar position at the latitude and longitude of the installed building at the set date and time, and the intensity of direct sunlight at the set latitude and longitude of the building are calculated using the following equations, respectively. In addition, the following formula is an example, and the intensity of the direct sunlight can be calculated using another formula.

  Thereafter, the threshold value of the brightness of the reflected light on the reflecting surface is set by inputting from the input unit 42 or reading from the brightness threshold parameter group of the storage unit 30, and the reflection angle calculated above, the intensity of direct sunlight, and Based on the incident angle and the threshold value of the brightness of the set reflected light, a reflection characteristic threshold value on the reflection surface of the direct sunlight is calculated (step S15). The reflection characteristic threshold value is, for example, a threshold value of reflectance on the reflection surface of direct sunlight. For example, when a reflection characteristic function is used as the threshold value, the reflection characteristic threshold value is calculated using the following formula. Note that the reflection characteristic function may be set as a threshold value, and the reflectance that is an integrated value thereof may be set as the threshold value. Also, the following formula is an example, and the intensity of the direct sunlight can be calculated using another formula.

  And the process of step S12-step S15 is repeated, for example, a time unit, a day unit, a month unit, the number is a month unit, a season unit, a year unit, or a unit of several years, and is performed for a predetermined period. The minimum value in the predetermined period of the reflection characteristic threshold value calculated in (1) is determined (step S16), and this process ends. For example, when the reflection characteristic threshold value calculated in step S15 is the reflectance, the designer uses the reflection directivity characteristic data stored in the storage unit 30 as the minimum value of the reflectance determined in step S16 for a predetermined period. By comparing with the luminance distribution indicated by (see FIG. 3), a material having reflection specific data that does not exceed the minimum reflectance in the total reflection direction of −90 degrees to 90 degrees can be selected. In addition, the process of these steps may be performed only once, without repeating the process of step S12-step S15, and the minimum value of a reflective characteristic threshold value may be determined. That is, the minimum value of the reflection characteristic threshold value in the present invention includes the reflection characteristic threshold value calculated when the steps S12 to S15 are performed only once.

FIG. 5 is a flowchart showing a modification of the building material selection process of FIG. Steps S21 to S26 in the building material selection process in FIG. 5 are the same as steps S11 to S16 in FIG. 4, and different parts will be described below.
As shown in FIG. 5, after determining the annual minimum value of the reflection characteristic threshold in step S <b> 26, the reflection directivity characteristic data (FIG. 3) (step S27). Among the plurality of reflection directivity data stored in association with various materials, by determining the reflection directivity data that does not exceed the minimum reflectance at a total reflection angle of −90 degrees to 90 degrees, The material of the reflective surface can be selected.

  As described above, according to the present embodiment, the control unit 10 sets the light receiving condition indicating the light receiving position of the reflected light generated by the reflecting surface of the building material, and sets the reflecting surface condition including the angle and direction of the reflecting surface. Set, calculate the reflection angle from the reflecting surface satisfying the reflecting surface condition to the light receiving position satisfying the light receiving condition (step S11), set the date and time condition (step S12), the latitude and longitude of the building, and the above External conditions including weather conditions at the latitude and longitude of the building are set, and based on the date and time conditions and the external condition, the solar position and the intensity of direct sunlight at the latitude and longitude of the building are calculated (step S13), An incident angle of the direct sunlight to the reflection surface is calculated based on the sun position (step S14), a threshold value of the brightness of the reflected light is set, and the reflection angle and the direct sunlight are calculated. The reflection characteristic threshold value on the reflection surface of the direct sunlight is calculated based on the angle and the incident angle, and the luminance threshold value of the reflected light (step S15), and the minimum value of the reflection characteristic threshold value in a predetermined period is calculated. Since it determines (step S16), the appropriate building material selection can be performed in consideration of the reflected light from the building material used for the roof. Further, since the threshold value of the brightness of the reflected light can be set, the threshold value of the brightness can be changed according to the application area of the light receiving position, and the degree of freedom in design can be increased.

  Further, since the control unit 10 calculates the minimum value of the reflection characteristic threshold value in a predetermined period and compares it with the reflection directivity characteristic data stored in the storage unit 30 (step S27), the total reflection of −90 degrees to 90 degrees is performed. It is possible to discriminate reflection characteristic data that does not exceed the minimum reflectance by the angle, and it is possible to quickly and easily select the material of the reflective surface on the roof.

FIG. 6 is a block diagram schematically showing the configuration of the building material selection device according to the second embodiment of the present invention. The construction of the building material selection device in FIG. 6 is basically the same as the device in FIG. 1, so the description of the same configuration will be omitted, and different parts will be described below.
6, the building material selection apparatus 2 includes a control unit 50, and the control unit 50 includes a material setting unit 51, a reflecting surface condition setting unit 52, a light receiving condition setting unit 53, a reflection angle calculation unit 54, and date / time conditions. A setting unit 55, an external condition setting unit 56, a direct sunlight intensity calculating unit 57, an incident angle calculating unit 58, a reflecting surface luminance calculating unit 59, a luminance maximum value determining unit 60, a luminance threshold setting unit 61, and a luminance determining unit 62 are provided. Yes. The reflecting surface condition setting unit 52, the light receiving condition setting unit 53, the reflection angle calculation unit 54, the date and time condition setting unit 55, the external condition setting unit 56, the direct sunlight intensity calculation unit 57, and the incident angle calculation unit 58 are the same in FIG. Same as name element.

FIG. 7 is a flowchart of the building material selection process executed by the building material selection apparatus 2 of FIG.
In FIG. 7, first, the material of the reflective surface in the building material is set based on the reflection directivity characteristic information indicating the reflection directivity characteristic for each material of the building material acquired in advance. Specifically, predetermined reflection directivity data is selected from a plurality of reflection directivity characteristics data (see FIG. 3) stored in the storage unit 30, and a material associated with the reflection directivity characteristics data is selected as a roof. Is set as a building material (step S31).

  Next, while setting the light receiving condition indicating the light receiving position of the reflected light generated by the reflective surface of the roof, and setting the reflective surface condition including the angle and direction of the reflective surface, from the reflective surface satisfying this reflective surface condition The reflection angle to the light receiving position that satisfies the light receiving condition is calculated (step S32).

  In addition, the date and time conditions are set in consideration of changes in the orbit of the sun throughout the year (step S33), and external conditions including the latitude and longitude of the building and the weather conditions at the latitude and longitude of the building are set. Based on the date and time conditions and the external conditions, the solar position and the intensity of direct sunlight at the latitude and longitude of the building are calculated (step S34). Furthermore, based on the sun position calculated above, the incident angle of the direct sunlight on the reflection surface is calculated (step S35). In addition, the process from step S32 to step S35 in this process is the same as the process from step S11 to step S14 in the flowchart of FIG.

  Thereafter, the brightness of the reflecting surface viewed from the light receiving position is calculated based on the reflection angle, the intensity of the direct sunlight, and the incident angle (step S36). The luminance of the reflecting surface is the luminance of the direct sunlight reflecting surface, and is calculated using the following formula. The following formula is an example, and the intensity of the reflecting surface can be calculated using another formula.

  Further, by repeating the steps S33 to S36, the date and time conditions are changed for a predetermined period, for example, in units of time, days, months, months, seasons, years or years, The maximum value of the calculated luminance in a predetermined period is determined (step S37), and this process ends. Note that the maximum luminance value may be determined by performing the processing of these steps only once without repeating the steps S33 to S36. That is, the maximum luminance value in the present invention includes a luminance value calculated when the steps S33 to S36 are performed only once. Then, the designer determines whether or not the maximum value of the brightness of the reflecting surface determined in step S37 is acceptable according to the use area of the light receiving position, and selects the material set in step S31. By doing so, the material of the reflecting surface can be selected.

FIG. 8 is a flowchart showing a modification of the building material selection process of FIG. Steps S41 to S46 in the building material selection process in FIG. 5 are the same as steps S31 to S66 in FIG. 4, and different parts will be described below.
As shown in FIG. 8, after calculating the luminance of the reflecting surface viewed from the light receiving position in step S46, the processes of steps S43 to S46 are repeated for a predetermined period, and the predetermined reflection characteristic threshold value calculated above is determined. Determine the maximum value over time.

  Next, the control unit 50 sets a threshold value of the luminance of the reflected light on the reflecting surface, and determines whether or not the maximum value of the luminance of the reflecting surface in a predetermined period is equal to or lower than the threshold value of the reflected light. (Step S47). When the maximum value of the luminance of the reflecting surface in the predetermined period exceeds the threshold value of the luminance of the reflected light, the process returns to step S41 and the subsequent steps are performed. If the maximum value is less than or equal to the threshold value of the reflected light brightness, the material set in step S41 is determined as the material of the reflecting surface (step S48).

  According to the present embodiment, the control unit 50 sets the material of the roof (step S41), sets the light receiving condition indicating the light receiving position of the reflected light generated by the reflective surface of the roof, and sets the angle of the reflective surface and The reflecting surface condition including the direction is set, the reflection angle of the reflected light from the reflecting surface satisfying the reflecting surface condition to the light receiving position satisfying the light receiving condition is calculated (step S42), and the date and time condition is set (step S43). Set the external conditions including the latitude and longitude of the building and the weather conditions at the latitude and longitude of the building, and based on the date and time condition and the external condition, the solar position and the direct sunlight of the building An intensity is calculated (step S44), an incident angle of the direct sunlight on the reflecting surface is calculated based on the sun position (step S45), the reflection angle, Based on the intensity of sunlight and the incident angle, the luminance of the reflecting surface viewed from the light receiving position is calculated (step S46), and the maximum value of the luminance of the reflecting surface in a predetermined period is determined. Appropriate building material selection can be performed with sufficient consideration of reflected light from the building materials used. In addition, it is possible to appropriately determine whether or not the designer can tolerate the maximum value of the luminance in the predetermined period, and the degree of design freedom can be increased.

  Further, the control unit 50 sets a threshold value of the brightness of the reflected light on the reflecting surface, and determines whether or not the maximum value of the brightness of the reflecting surface in a predetermined period is equal to or less than the threshold value of the reflected light. (Step S47) When the maximum value of the luminance of the reflecting surface in the predetermined period is not more than the threshold value of the luminance of the reflected light, the material set in Step S41 is determined as the material of the reflecting surface (Step S48). The material of the reflective surface on the roof can be selected quickly and easily.

  The building material selection device, the building material selection method, the program for executing the method, and the recording medium according to the above embodiment have been described above, but the present invention is not limited to the described embodiment, and the technology of the present invention. Various modifications and changes can be made based on the idea.

  The object of the present invention is achieved by executing the following processing. That is, a non-transitory storage medium that records software program codes that implement the functions of the above-described embodiments is supplied to a system or apparatus, and a computer (or CPU, MPU, or the like) of the system or apparatus stores the storage medium. This is a process of reading the program code stored in.

  In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the program code and the storage medium storing the program code constitute the present invention.

  Moreover, the following can be used as a storage medium for supplying the program code. For example, floppy (registered trademark) disk, hard disk, magneto-optical disk, CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD + RW, Blu-ray (registered trademark), magnetic A tape, a nonvolatile memory card, a USB memory, a ROM, and the like. Alternatively, the program code may be downloaded via a network.

  Further, the present invention includes a case where the function of the above-described embodiment is realized by executing the program code read by the computer. In addition, an OS (operating system) running on the computer performs part or all of the actual processing based on an instruction of the program code, and the functions of the above-described embodiments are realized by the processing. Is also included.

  Furthermore, a case where the functions of the above-described embodiment are realized by the following processing is also included in the present invention. That is, the program code read from the storage medium is written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer. Thereafter, based on the instruction of the program code, the CPU or the like provided in the function expansion board or function expansion unit performs part or all of the actual processing.

  The building material selection device of the present invention includes a house, a store, a station building, an office, a school, a library / museum, an elderly / welfare home, a nursery school, a public bath, a clinic, a hospital, a dispatch station, a post office, a branch office / branch, a factory, It can be applied to various buildings such as amusement halls, gymnasiums, hotels and inns, warehouses, theaters, restaurants, and processing facilities.

DESCRIPTION OF SYMBOLS 1 Building material selection apparatus 2 Building material selection apparatus 10 Control part 11 Light reception condition setting part 12 Reflecting surface condition setting part 13 Reflection angle calculation part 14 Date and time condition setting part 15 External condition setting part 16 Direct sunlight intensity | strength calculation part 17 Incident angle calculation part 18 Brightness Threshold setting unit 19 Reflection characteristic threshold calculation unit 20 Reflection characteristic minimum value determination unit 21 Material selection unit 30 Storage unit 31 Light receiving condition parameter group 32 Reflecting surface condition parameter group 33 External condition parameter group 34 Luminance threshold parameter group 35 Reflection directivity characteristic data 41 Communication I / F
42 Input unit 43 Output unit 44 Display unit 50 Control unit 51 Material setting unit 52 Reflective surface condition setting unit 53 Light receiving condition setting unit 54 Reflection angle calculation unit 55 Date and time condition setting unit 56 External condition setting unit 57 Direct sunlight intensity calculation unit 58 Incident Angle calculation unit 59 Reflection surface luminance calculation unit 60 Luminance maximum value determination unit 61 Luminance threshold setting unit 62 Luminance discrimination unit A1 Light reception position A2 Light reception position B Building C Building material D Reflection surface

Claims (10)

A building material selection device for selecting a building material used for a building,
A light receiving condition setting unit for setting a light receiving condition indicating a light receiving position of reflected light generated by the reflecting surface of the building material;
A reflecting surface condition setting unit for setting reflecting surface conditions including the angle and orientation of the reflecting surface;
A reflection angle calculation unit for calculating a reflection angle from a reflection surface satisfying the reflection surface condition to a light receiving position satisfying the light reception condition;
A date and time condition setting section for setting date and time conditions;
An external condition setting unit that sets external conditions including the latitude and longitude of the building, and weather conditions in the latitude and longitude of the building;
Based on the date and time conditions and the external conditions, a direct sunlight intensity calculation unit that calculates the solar position and the intensity of direct sunlight at the latitude and longitude of the building;
An incident angle calculator that calculates an incident angle of the direct sunlight on the reflecting surface based on the sun position;
A luminance threshold value setting unit for setting a luminance threshold value of the reflected light;
Based on the reflection angle, the intensity of the direct sunlight and the incident angle, and the threshold value of the brightness of the reflected light, a reflection characteristic threshold value calculation unit that calculates a reflection characteristic threshold value on the reflection surface of the direct sunlight; and
A reflection characteristic minimum value determining unit for determining a minimum value of the reflection characteristic threshold;
A building material selection device comprising:   Comparing the maximum value of the reflection characteristic threshold value with the reflection directivity characteristic information indicating the reflection directivity characteristic for each material of the building material acquired in advance, the apparatus further includes a material selection unit that selects the material of the reflection surface. The building material selection device according to claim 1. A building material selection device for selecting a building material used for a building,
A material setting unit for setting the material of the building material;
A light receiving condition setting unit for setting a light receiving condition indicating a light receiving position of reflected light generated by the reflecting surface of the building material;
A reflecting surface condition setting unit for setting reflecting surface conditions including the angle and orientation of the reflecting surface;
A reflection angle calculation unit for calculating a reflection angle of reflected light from a reflection surface satisfying the reflection surface condition to a light receiving position satisfying the light reception condition;
A date and time condition setting section for setting date and time conditions;
An external condition setting unit that sets external conditions including the latitude and longitude of the building, and weather conditions in the latitude and longitude of the building;
Based on the date and time conditions and the external conditions, a direct sunlight intensity calculation unit that calculates the solar position and the intensity of direct sunlight at the latitude and longitude of the building;
An incident angle calculator that calculates an incident angle of the direct sunlight on the reflecting surface based on the sun position;
Based on the reflection angle, the intensity of the direct sunlight, and the incident angle, a reflection surface luminance calculation unit that calculates the luminance of the reflection surface viewed from the light receiving position;
A luminance maximum value determining unit for determining a maximum value of luminance of the reflecting surface;
A building material selection device comprising:   The building material according to claim 3, wherein the material setting unit sets a material of a reflective surface in the building material based on reflection directivity characteristic information indicating a reflection directivity characteristic for each material of the building material acquired in advance. Selection device. A luminance threshold value setting unit for setting a luminance threshold value of the reflected light;
A brightness discriminating unit that discriminates whether or not the maximum value of the brightness of the reflecting surface is equal to or less than a threshold value of the brightness of the reflected light;
The building material selection device according to claim 3, further comprising: A building material selection method for selecting a building material to be used for a building, which is executed by a computer,
A light receiving condition setting step for setting a light receiving condition indicating a light receiving position of reflected light generated by the reflecting surface of the building material;
A reflecting surface condition setting step for setting reflecting surface conditions including the angle and orientation of the reflecting surface;
A reflection angle calculating step of calculating a reflection angle from a reflection surface satisfying the reflection surface condition to a light receiving position satisfying the light reception condition;
A date and time condition setting step for setting the date and time condition;
An external condition setting step for setting external conditions including the latitude and longitude of the building, and weather conditions in the latitude and longitude of the building;
Based on the date and time conditions and the external conditions, a direct sunlight intensity calculating step for calculating the solar position and the intensity of direct sunlight at the latitude and longitude of the building;
An incident angle calculating step of calculating an incident angle of the direct sunlight on the reflecting surface based on the solar position;
A luminance threshold setting step for setting a threshold of luminance of the reflected light;
Based on the reflection angle, the intensity of the direct sunlight and the incident angle, and the brightness threshold of the reflected light, a reflection characteristic threshold value calculating step for calculating a reflection characteristic threshold value on the reflection surface of the direct sunlight; and
A reflection characteristic minimum value determining step for determining a minimum value of the reflection characteristic threshold;
A construction material selection method characterized by comprising: A building material selection method for selecting a building material to be used for a building, which is executed by a computer,
A material setting step for setting the material of the building material;
A light receiving condition setting step for setting a light receiving condition indicating a light receiving position of reflected light generated by the reflecting surface of the building material;
A reflecting surface condition setting step for setting reflecting surface conditions including the angle and orientation of the reflecting surface;
A reflection angle calculation step of calculating a reflection angle of reflected light from a reflection surface satisfying the reflection surface condition to a light receiving position satisfying the light reception condition;
A date and time condition setting step for setting the date and time condition;
An external condition setting step for setting external conditions including the latitude and longitude of the building, and weather conditions in the latitude and longitude of the building;
Based on the date and time conditions and the external conditions, a direct sunlight intensity calculating step for calculating the solar position and the intensity of direct sunlight at the latitude and longitude of the building;
An incident angle calculating step of calculating an incident angle of the direct sunlight on the reflecting surface based on the solar position;
A reflection surface luminance calculation step for calculating the luminance of the reflection surface viewed from the light receiving position based on the reflection angle, the intensity of the direct sunlight, and the incident angle;
A luminance maximum value determining step for determining a maximum luminance value of the reflecting surface;
A construction material selection method characterized by comprising: A program recorded on a computer-readable recording medium for causing a computer to execute a building material selection method for selecting a building material to be used in a building,
A light receiving condition setting step for setting a light receiving condition indicating a light receiving position of reflected light generated by the reflecting surface of the building material;
A reflecting surface condition setting step for setting reflecting surface conditions including the angle and orientation of the reflecting surface;
A reflection angle calculating step of calculating a reflection angle from a reflection surface satisfying the reflection surface condition to a light receiving position satisfying the light reception condition;
A date and time condition setting step for setting the date and time condition;
An external condition setting step for setting external conditions including the latitude and longitude of the building, and weather conditions in the latitude and longitude of the building;
Based on the date and time conditions and the external conditions, a direct sunlight intensity calculating step for calculating the solar position and the intensity of direct sunlight at the latitude and longitude of the building;
An incident angle calculating step of calculating an incident angle of the direct sunlight on the reflecting surface based on the solar position;
A luminance threshold setting step for setting a threshold of luminance of the reflected light;
Based on the reflection angle, the intensity of the direct sunlight and the incident angle, and the brightness threshold of the reflected light, a reflection characteristic threshold value calculating step for calculating a reflection characteristic threshold value on the reflection surface of the direct sunlight; and
A reflection characteristic maximum value determining step for determining a minimum value of the reflection characteristic threshold;
The program characterized by having. A program recorded on a computer-readable recording medium for causing a computer to execute a building material selection method for selecting a building material to be used in a building,
A material setting step for setting the material of the building material;
A light receiving condition setting step for setting a light receiving condition indicating a light receiving position of reflected light generated by the reflecting surface of the building material;
A reflecting surface condition setting step for setting reflecting surface conditions including the angle and orientation of the reflecting surface;
A reflection angle calculation step of calculating a reflection angle of reflected light from a reflection surface satisfying the reflection surface condition to a light receiving position satisfying the light reception condition;
A date and time condition setting step for setting the date and time condition;
An external condition setting step for setting external conditions including the latitude and longitude of the building, and weather conditions in the latitude and longitude of the building;
Based on the date and time conditions and the external conditions, a direct sunlight intensity calculating step for calculating the solar position and the intensity of direct sunlight at the latitude and longitude of the building;
An incident angle calculating step of calculating an incident angle of the direct sunlight on the reflecting surface based on the solar position;
A reflection surface luminance calculation step for calculating the luminance of the reflection surface viewed from the light receiving position based on the reflection angle, the intensity of the direct sunlight, and the incident angle;
A luminance maximum value determining step for determining a maximum luminance value of the reflecting surface;
The program characterized by having.   A computer-readable recording medium on which the program according to claim 8 or 9 is recorded.

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