JP2011196985A - Method of measuring environment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly, precisely, and easily measure concentration of gas to be measured.SOLUTION: As a metal thin film, for example an alloy composition thin film is created (S1), an exposure test of the alloy composition thin film is executed for each different kind of corrosive gas (S2), a change in a color image of the entire thin film with time is photographed (S3), and an alloy composition candidate where a curve in which image data are expanded onto an rgb color space does not cross is selected (S4). A compound gas test of an object gas is performed to verify the absence of a mutual influence (S6). A test at a different gas concentration is executed for each corrosive gas with a determined alloy composition, a calibration curve is created, and a plurality of travel distance data for each concentration indicating results where a relationship between a travel distance of three stimulus values traveling on the calibration curve is obtained for each concentration are stored (S7). Under exposure of the corrosive gas the concentration of which is unknown, the travel distance where the three stimulus values travel along the calibration curve, and exposure time are observed, and the concentration of a corrosive gas the concentration of which is unknown is calculated, based on the observation result and a plurality of stored travel distance data for each concentration (S8).

Description

  The present invention relates to an environment measuring method, an environment measuring apparatus, and an environment measuring element for measuring the concentration of a specific gas in the environment.

  If there are a lot of corrosive gas, sea salt particles, dust, etc. in the surrounding environment where electronic / electric equipment is installed, the deterioration of the equipment progresses unexpectedly and may suffer from corrosion problems soon after delivery. For this reason, it is common to perform environmental evaluation for the purpose of grasping the influence of the installation environment on the device before the device is installed. In addition, when an unexpected corrosion problem occurs after delivery, environmental assessment is often performed to investigate the cause and grasp the environmental improvement effects.

  For example, the corrosive gas concentration in an environment where electronic / electrical equipment is installed is almost as low as 1 ppm or less, so it cannot be easily measured with a gas detector tube. Is adopted.

  Conventional environmental assessment methods include sampling the atmosphere of the target environment and chemically analyzing the gas contained in it, and exposing a specific substance to the environment for a certain period of time, It is divided roughly into the method of examining. The latter method is generally performed by exposing a single or a plurality of metal plates and examining their weight changes. Alternatively, a method of chemically examining the amount of adsorption by exposing a filter paper soaked with a gas adsorbing drug and causing the gas and the drug to react with each other is also performed. In recent years, there has been proposed a method for obtaining a change in weight of a substance deposited on a crystal oscillator from a change in frequency as disclosed in Patent Document 1. Further, Patent Document 2 discloses a method of forming an environment evaluation from changes in transmitted light, reflected light, and electric resistance by forming two or more types of metal thin films on one insulating substrate. Further, as disclosed in Patent Document 3, a method for determining the color change of corrosion of a metal test piece based on a determination table divided into a plurality of environmental levels by numerical values of RGB colors is disclosed. Since this method makes a determination for each color of RGB, if the environmental level of each color is different, the environmental level is determined by averaging the respective determination results. However, any of these methods is a method that takes a long time to obtain a result or a method that does not have high accuracy, and the concentration of the gas to be measured cannot be measured accurately and simply in a short time.

  On the other hand, Patent Document 4 includes two or more types of metals having different reactivities depending on the type of gas, and the composition is continuously or intermittently different for each position on the substrate surface. There has been proposed an environmental measuring element in which thin films having different colors after reaction are formed on the substrate surface depending on the type. Further, in Patent Document 5, the relationship between the tristimulus value of the color of the coloring member whose color development state changes in response to the temperature and the temperature is displayed in a three-dimensional color space, and the color of the color over the entire coloring range is displayed. There has been proposed a technique for measuring temperature over a wide range by associating tristimulus values with temperature in a monovalent function.

JP 2001-99777 A JP 2003-294606 A Japanese Patent No. 3350578 JP 2006-145390 A Japanese Patent No. 3376237

  Patent Document 4 is an excellent technique for specifying the type of gas and the like, and Patent Document 5 is an excellent technique for measuring the temperature of an object. However, even if these techniques are used, it is not easy to measure the concentration of the gas to be measured accurately and simply in a short time.

  The present invention has been made in view of the above circumstances, and provides an environmental measurement method, an environmental measurement device, and an environmental measurement element capable of measuring the concentration of a gas to be measured accurately and simply in a short time. For the purpose.

  The environmental measurement method according to an aspect of the present invention includes a first element that is exposed to at least one specific gas and changes in color with time, and is exposed to the specific gas having a known concentration. A trajectory in which a color change with time is photographed by an imaging device, and the tristimulus values of the color of the first element move in a three-dimensional color space having three coordinate axes in which one coordinate axis corresponds to each stimulus value. The curve that corresponds to the curve and does not intersect itself in the three-dimensional color space is defined as a calibration curve, and the relationship between the moving distance of the tristimulus values of the color moving on the calibration curve and the exposure time is obtained for each concentration. A plurality of moving distance data by concentration obtained by exposing the second element having the same composition as the first element to the specific gas having an unknown concentration, and the tristimulus values of the color of the second element Move along the calibration curve in the three-dimensional color space. Based on the observation results obtained by observing the distance between the exposure time and the concentration and obtains the concentration of the unknown specific gas.

  According to another aspect of the present invention, there is provided an environment measuring apparatus that is photographed by an imaging device in a state where a first element that is exposed to at least one specific gas and changes its color with time is exposed to the specific gas. The three-stimulus value of the color of one element is a curve corresponding to a trajectory moving in a three-dimensional color space having three coordinate axes in which one coordinate axis corresponds to each stimulus value, and the three-dimensional color space A plurality of movement distance data for each concentration obtained by calculating the relationship between the movement distance of the tristimulus values of the color moving on the calibration curve and the exposure time for each concentration. A storage means for storing in a storage medium; a holding unit that allows the second element having the same composition as the first element to be placed and exchanged; an illumination that applies predetermined light to the second element; An imaging device capable of photographing the color change of the second element; The distance and exposure that the tristimulus value of the color of the second element moves along the calibration curve in the three-dimensional color space with the second element exposed to a specific gas of unknown Gas concentration calculating means for observing time and obtaining the concentration of a specific gas whose concentration is unknown based on the observation result and a plurality of movement distance data for each concentration of the storage means To do.

  An environment measurement element according to another aspect of the present invention is an environment measurement element having a metal thin film whose color changes with time when exposed to a specific gas. The metal thin film is exposed to the specific gas. When the color changes with time, the color change has a metal composition that forms a curve that does not intersect with itself in a three-dimensional color space having the tristimulus values of the color as coordinate axes.

  According to the present invention, it is possible to easily and accurately measure the concentration of a gas to be measured in a short time.

The block diagram which shows an example of a structure of the environment measuring apparatus which concerns on the 1st Embodiment of this invention. The conceptual diagram which shows an example of the metal thin film used for an environmental measuring apparatus. The graph which shows the change of rgb value accompanying the color change of a thin film. The graph which shows a mode that the change of the rgb value accompanying the color change of a thin film was expand | deployed on rgb three-dimensional color space. The figure which shows an example of the curve which cannot be used as a calibration curve. The figure which shows another example of the curve which cannot be used as a calibration curve. The conceptual diagram which shows the tolerance range of a calibration curve. The graph which converts the color change when Cu60% -Ag20% -Sn20% is vapor-deposited on a glass substrate, and is corroded in hydrogen sulfide gas, and converts into a rgb value. The graph which shows a mode that the color change of FIG. 8 was re-expanded on rgb color space. The graph which shows a mode that the progress degree of a color change advances depending on gas concentration. The graph which shows that gas concentration and exposure time have a linear relationship (inverse proportional relationship). FIG. 9 is a conceptual diagram showing how the movement distance (cumulative value) for each exposure time in the three-dimensional color space of rgb is obtained from the color change (calibration curve) for each concentration shown in FIG. 9 and compared according to the gas concentration. . The graph for demonstrating the method of identifying the gas concentration of a measuring object. The graph for demonstrating raising the precision of identification density | concentration by increasing a calibration curve. The graph for demonstrating the method of evaluating the density | concentration change (a sudden increase in density | concentration etc.) of object gas. The graph for demonstrating that it can be determined whether the density | concentration became more than a reference density, even when there is one calibration curve. The conceptual diagram for demonstrating that it is difficult to make a surface state uniform at the time of metal thin film production | generation. The graph which shows a mode that the allowable range of data was narrowed and the rgb value of the pixel in the range was overlapped on the calibration curve. The graph for demonstrating identifying the exposure time of the selection area | region by calculating | requiring the frequency distribution with respect to exposure time, and calculating an average value. The flowchart which shows the basic procedure of the environmental measurement method which concerns on the embodiment. The block diagram which shows an example of a structure of the environment measurement apparatus which concerns on the 2nd Embodiment of this invention. The conceptual diagram which shows the 1st example of the environment measuring element which concerns on the same embodiment which concerns on the 3rd Embodiment of this invention. The conceptual diagram which shows the 2nd example of the environment measuring element which concerns on the same embodiment. The conceptual diagram which shows the 3rd example of the environmental measurement element which concerns on the same embodiment. The conceptual diagram which shows the 4th example of the environment measuring element which concerns on the same embodiment. The block diagram which shows an example of a structure of the environmental measurement apparatus which measures the density | concentration of corrosive gas using the environmental measurement element which concerns on the same embodiment.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
First, a first embodiment of the present invention will be described.

  FIG. 1 is a block diagram showing an example of the configuration of the environment measuring apparatus according to the first embodiment of the present invention.

  The environment measurement apparatus shown in FIG. 1 can be realized as a portable terminal, for example, and includes, as constituent elements, a metal thin film 1, a CCD camera 2, a data creation unit 3, a storage unit 4, and a gas concentration calculation unit. 5 and an output device 7. In addition, although not shown in the figure, illumination for applying predetermined light to the metal thin film 1 and a holding unit that allows the metal thin film 1 to be mounted and replaced are provided.

  The metal thin film 1 is a metal thin film deposited on a substrate, and is an element that is exposed to at least one specific gas and has a tendency to change in color with time. For example, it can be applied to two or more types of corrosive gases, includes three types of metals that have different reactivities depending on the type of corrosive gas, and the composition varies continuously or intermittently at each position. In addition, an alloy composition gradient thin film having a different color tone after reaction depending on the type of corrosive gas that reacts with the composition is employed. For example, as shown in FIG. 2, the alloy composition gradient thin film has a Cu-Ag-Sn composition gradient thin film formed on a glass substrate, and the Cu-Ag-Sn composition gradient thin film has a Cu content on the surface thereof. It is configured to change in the x-axis direction, the Ag content rate to change in the y-axis direction, and the Sn content rate to change in the z-axis direction.

  In this way, as a metal that changes color due to corrosion, a metal thin film is applied instead of a metal plate, and the time of color changes due to corrosion of a metal thin film deposited on a flat substrate surface that reacts with corrosive gas. Can be observed. Since the metal thin film composition is difficult to observe in a composition in which the calibration curve (calibration curve) of the tristimulus values of the color does not change or change in the three-dimensional color space of the tristimulus values described later, A composition that produces the most wavy calibration curve and an easily observable curve is adopted. In order to realize the optimum metal composition, it is desirable to use the alloy composition gradient thin film as described above. When the alloy composition gradient thin film is a ternary composition gradient thin film as in the above example, all alloy compositions of the three elements can be formed on one substrate. By exposing this substrate to a corrosive gas atmosphere and expressing the color change in a three-stimulus value three-dimensional color space described later for each alloy composition, the optimum composition can be easily selected. The metal composition thin film adopted in this way is a highly reactive thin film metal composition, and therefore has the effect of shortening the measurement time.

  The corrosive gas to which the metal thin film 1 is exposed is a main corrosive gas existing in the environment, and examples thereof include sulfurous acid gas, hydrogen sulfide gas, chlorine gas, ammonia gas, and nitrogen oxide gas. . The nitrogen oxide gas here includes dinitrogen monoxide, nitric oxide, dinitrogen trioxide, nitrogen dioxide, dinitrogen tetroxide, dinitrogen pentoxide, and the like.

  In manufacturing and using the metal thin film 1, various techniques shown in the above-mentioned Patent Document 4 may be applied.

  The CCD camera 2 is an imaging device that can capture a color change with time at each position of the metal thin film 1 as a color image.

  The information processing unit 6 having the data creation unit 3, the storage unit 4, and the gas concentration calculation unit 5 can be realized as, for example, a computer including a processor that executes a program and a memory.

  The data creation unit 3 has a function of calculating the tristimulus values of the color of the metal thin film 1 photographed by the CCD camera 2, and three coordinate axes in which the tristimulus values correspond to one coordinate axis for each stimulus value. Among the functions for obtaining each trajectory moving in a three-dimensional color space having a function, the function for creating a curve corresponding to the trajectory, and the position of the metal thin film 1, the curve itself is in the three-dimensional color space. A function of performing a test for selecting a predetermined position that does not intersect and separately exposing the metal thin film 1 to a specific gas having a different concentration and a known concentration, and the tristimulus value of the color at the selected position in the test. A curve corresponding to the locus moving in the three-dimensional color space is used as a calibration curve (calibration curve), and the relationship between the moving distance of the tristimulus value of the color moving on the calibration curve and the exposure time is obtained for each concentration. Obtained Having like storing function to degrees by a plurality of mobile distance data storage medium. Further, such a calibration curve and a plurality of related movement distance data are created for each corrosive gas. Thereby, the density | concentration of desired gas can be measured for every corrosive gas based on a corresponding calibration curve and several movement distance data.

  The color change in the corrosion reaction of the metal by the corrosive gas has a low change rate when the concentration is low and a high change rate when the concentration is high, but the tendency of the color change is almost the same. Therefore, by preparing the movement distance data regarding the calibration curve for each concentration as described above, it is possible to measure an arbitrary gas concentration at an arbitrary exposure time.

  In the present embodiment, the tristimulus values of the color in the three-dimensional color space are expressed by the equation r = R / (R + G + B), g = G, where the tristimulus values in the RGB color system are R, G, B. / (R + G + B), b = B / (R + G + B). Thus, when the rgb value is adopted as the tristimulus value, there is an advantage that the difference in lightness at the time of color measurement can be easily canceled as compared with the case where the RGB value is adopted as the tristimulus value. Of course, in addition to the RGB color system and the L * a * b * color system, the HSI color system, the XYZ color system, and the like can be applied.

  In the present embodiment, the calibration curve in the three-dimensional color space is formed in a tubular shape with a certain allowable width based on the trajectory along which the tristimulus values of the color move.

  The color change of the metal due to the corrosive gas is not uniform, and even when the test is performed under the same exposure conditions, the color change varies somewhat. This is because the corrosion reaction does not proceed in exactly the same state due to slight differences in surface roughness of metals, differences in the degree of oxidation, or variations in the concentration of corrosive gases, variations in flow, variations in temperature and humidity, etc. is there. Even if the test conditions are controlled to be constant, the discoloration of the metal surface does not become one color. Therefore, when the corrosion level is determined based on the color change, it is necessary to provide a robust determination system. For this purpose, it is desirable that the calibration curve has an allowable width (allowable error range) as described above.

  In forming and using a curve in the three-dimensional color space, various techniques disclosed in the above-mentioned Patent Document 5 may be applied.

  The storage unit 4 is a storage medium that stores, as a database, calibration curve data created by the data creation unit 3 and a plurality of movement distance data for each concentration. The stored database is used by the gas concentration calculation unit 5.

  The gas concentration calculation unit 5 moves the tristimulus values of the color at the selected position along the calibration curve in the three-dimensional color space in a state where the metal thin film 1 is exposed to a specific gas whose concentration is unknown. The moving distance and the exposure time are observed, and the concentration of a specific gas whose concentration is unknown is obtained based on the observation result and a plurality of moving distance data for each concentration stored in the storage unit 4. In this case, between the observation results and the plurality of movement distance data for each concentration, the movement distance in the same exposure time is compared to determine the ratio of the movement distance, and based on the ratio, from a plurality of known concentrations, The concentration of the specific gas whose concentration is unknown is obtained.

  In addition, the gas concentration calculation part 5 is further provided with the following various functions.

  That is, the gas concentration calculation unit 5 observes the change in the moving distance along which the tristimulus value of the color at the selected position moves along the calibration curve in the three-dimensional color space, so that the concentration is unknown. It has a function to catch the time change of the concentration of the specific gas. Further, the data creation unit 3 compares the travel distance at the same exposure time between at least one of the observation result and the plurality of travel distance data for each concentration, so that the concentration of the specific gas whose concentration is unknown. Has a function of determining whether or not exceeds a reference value. Further, it has a function of outputting an alarm indicating a warning when the concentration of the specific gas whose concentration is unknown exceeds a reference value.

  The output device 7 corresponds to a display that displays information on a screen, a printer that prints and outputs information, and the result of processing performed by the data creation unit 3 and the gas concentration calculation unit 5 and a storage unit. The information stored in 4 can be output.

  In addition, although the example using an alloy composition gradient thin film was shown in the above-mentioned description, the said alloy composition gradient thin film is not necessarily required when implementing this invention. As will be described later, the concentration of a specific gas may be measured using an element in which an optimum alloy composition for forming a calibration curve is selected and a thin film having the selected alloy composition is deposited on a glass substrate. In that case, the above-described gas concentration calculation unit 5 may be, for example, another element (second element) having the same alloy composition as the alloy composition of the element (first element) at the position on the metal thin film selected by the data creation unit 3. The concentration of the specific gas is measured using the element. At this time, the second element is placed on the above-described holding unit, and predetermined light is applied by the above-described illumination.

  Hereinafter, a method for measuring the concentration of a gas having an unknown concentration will be described with a specific example.

  Here, for hydrogen sulfide gas, a Cu-Ag-Sn ternary composition gradient thin film (a film in which all three elements are formed on one substrate) in hydrogen sulfide gas at 2 ppm of hydrogen sulfide gas. Cu60% -Ag20% -Sn20% (hereinafter abbreviated as “Cu60Ag20Sn20”), which is corroded and has the most remarkable color change, is selected as the measurement metal composition. An image file obtained by photographing a color change when a metal thin film is deposited on a glass substrate and corroded with 2 ppm of hydrogen sulfide gas with a CCD camera is converted into RGB values. An rgb value normalized to a constant brightness is obtained from the RGB values. The rgb values are calculated as r = R / (R + G + B), g = G / (R + G + B), and b = B / (R + G + B), respectively.

  Here, the change of the rgb value accompanying the color change of a thin film is shown in FIG. As can be seen from FIG. 3, the rgb value changes smoothly according to the exposure time. However, when the rgb value is captured two-dimensionally with respect to the exposure time as described above, a multivalent function problem occurs. For example, when paying attention to the b value, the exposure times for b = 35 are in the vicinity of 2 hours and 12 hours, and in order to solve these multivalent problems, processing such as complicated case classification becomes necessary. . Therefore, FIG. 4 shows a result in which these data are respectively interpolated with respect to the exposure time and developed in the rgb three-dimensional color space. By capturing the same data in a three-dimensional color space in this way, the color change of the Cu60Ag20Sn20 composition metal film with respect to hydrogen sulfide gas exhibits a smooth rgb characteristic of one connection.

  Corrosion gas concentration is measured using this curve developed in the three-dimensional color space of rgb as a calibration curve. The color change in the corrosion reaction of the metal by the corrosive gas has a low change rate when the concentration is low, and a high change rate when the concentration is high, but has almost the same color change. Therefore, the gas concentration can be determined by capturing the color change rate of the metal thin film, that is, the progress rate of the calibration curve.

  In order to determine the gas concentration by this method, if the curves developed in the three-dimensional color space of rgb intersect or do not change, they cannot be used as a calibration curve. For example, FIG. 5 and FIG. 6 show the results of developing the color change of a pure copper thin film and a pure silver thin film in 2 ppm of hydrogen sulfide gas in a three-dimensional color space of rgb by the same method, respectively. In both cases, the curves intersect or pass through the same place. Such a curve cannot be a calibration curve.

  Further, as described above, the color change due to the corrosion reaction of the metal is not uniform, and even when tested under the same corrosion condition, the color change has some variation. This is because the corrosion reaction does not proceed in exactly the same state due to slight differences in surface roughness of metals, differences in the degree of oxidation, or variations in the concentration of corrosive gases, variations in flow, variations in temperature and humidity, etc. is there. Therefore, it is necessary to provide an allowable error range for color change in the calibration curve for determining the corrosive gas concentration. The allowable error range is determined by repeated evaluation under different gas test conditions. Measurement values that exceed the allowable error range cannot be determined.

  A conceptual diagram of an allowable error range of the calibration curve is shown in FIG. As shown in FIG. 7, the calibration curve 11 formed in the rgb three-dimensional color space has a certain allowable error range 12. In this case, data within the allowable error range 12 is handled as the determinable data 13, while data not within the allowable error range 12 is treated as the non-determinable data 14.

  In addition to hydrogen sulfide gas, for sulfurous acid gas and chlorine gas, which affect electrical equipment, select the optimal metal thin film composition using the same method, acquire calibration curves in advance, and create a database. The gas concentration of the gas can be determined. The same applies to the mixed gas. Thus, the concentration of a plurality of gases can be measured by selecting the measurement thin film composition to be exposed according to the type of the measured corrosive gas.

  Next, an example of the concentration identification method will be described.

  FIG. 8 is a graph showing the color change when the Cu60% -Ag20% -Sn20% (that is, "Cu60Ag20Sn20") is vapor-deposited on the glass substrate and corroded in hydrogen sulfide gas, and converted into rgb values. is there. FIG. 8 shows color changes when the gas concentration is 0.1 ppm, 0.7 ppm, and 1.5 ppm. FIG. 9 shows these color changes re-developed in the rgb color space. As can be seen from FIG. 9, the color of the Cu60Ag20Sn20 thin film shows almost the same color change regardless of the gas concentration, and changes from silver to purple to dark blue to blue to light blue depending on the exposure time. It was confirmed. Further, as shown in FIG. 10, it was found that the degree of progress of this color change proceeds depending on the gas concentration. That is, it was found that when the gas concentration is low (0.1 ppm), the color change is slow, and conversely, when the gas concentration is high, the color change is accelerated. For example, reaching the same blue color takes about 3 hours at a concentration of 0.1 ppm, whereas it takes about 1 hour at a concentration of 1.5 ppm.

  In order to further clarify the relationship between gas concentration and exposure time, using the color change obtained at different gas concentrations for the same sample data, the exposure time to reach a predetermined color at each gas concentration The results of measuring are shown in FIG. As shown in FIG. 11, it was found that the gas concentration and the exposure time are in a linear relationship (inverse proportional relationship). That is, these relationships mean that the gas concentration can be estimated from the color change according to the exposure time by using a calibration curve obtained at a constant gas concentration.

  FIG. 12 shows the movement distance (cumulative value) for each exposure time in the three-dimensional color space of rgb from the color change (calibration curve) for each concentration shown in FIG. 9, and compared according to the gas concentration. It is. As shown in FIG. 12, it can be seen that the moving distance changes according to the gas concentration. The greater the gas concentration, the greater the travel distance on the calibration curve. Therefore, the gas concentration of the measurement target is determined in advance by calculating the cumulative distance in the color space of the color of the metal thin film (test piece) corroded for a certain period of time in the measurement target gas atmosphere. It can be identified as shown in FIG. 13 from comparison with the cumulative distance of the calibration curve (proportional calculation). For example, it is assumed that the moving distance of the color in the rgb color space is 8 when the test piece is corroded with the target gas for 1.5 hours. On the other hand, it is assumed that the moving distance on the calibration curve is 2 when corroded with 0.1 ppm gas for 1.5 hours. Similarly, assuming that the moving distance on the calibration curve when corroded for 1.5 hours with 1.5 ppm gas is 13, the concentration of the gas to be measured can be determined by the following equation.

Concentration of target gas = 0.1 ppm + (1.5−0.1) ppm / (13-2) × (8-2) = 0.86 ppm
In this case, two calibration curves with known gas concentrations are required. However, it is possible to increase the accuracy of the identified concentration by increasing the calibration curves as shown in FIG.

  In addition, the color change of the test specimen in the measurement target gas atmosphere is obtained over time, and the change in the target gas concentration (such as a rapid increase in concentration) is obtained by determining the change in the cumulative distance in the three-dimensional color space. It can also be evaluated as 15.

  Further, as shown in FIG. 16, even when there is only one calibration curve, this can be used as a threshold value for issuing an alarm when a concentration higher than the reference value is detected. By determining the cumulative travel distance in the color space for each exposure time and examining the travel distance in the color space for this value and the color change of the target gas, it is determined whether the concentration has exceeded the reference concentration and whether there is a danger. Can be used to do.

In actual color measurement, a CCD camera is often used. In this case, a measurement object is captured by hundreds of thousands to millions of pixels. Suppose that a camera with about 1 million pixels is used and a test piece of about 20 mm ² is photographed with 1200 × 900 pixels. Even if an area of about 3 mm ² with few illumination spots is selected from the image, the number of pixels is 180 × 135 = 24000. FIG. 17 shows the rgb value of each of these pixels checked and superimposed on the calibration curve described above. As can be seen from FIG. 17, since it is actually difficult to make the surface state uniform when forming a metal thin film, the progress of corrosion differs in a minute region, and many colors appear even in a region of 3 mm ^2. It will be. Therefore, in the present embodiment, the gas concentration is identified by using only the color information of the pixels having a good coloration condition by determining the data allowable range as shown in FIG. FIG. 18 shows a graph in which the allowable range of data is narrowed (for example, within 1% distance of variation) and the rgb values of the pixels in the range are superimposed on the calibration curve. Then, by using only the data within the allowable range, the frequency distribution with respect to the exposure time is obtained as shown in FIG. 19, and the average value is calculated to identify the exposure time of the selected region.

  Next, a basic procedure of the environment measurement method according to the embodiment will be described with reference to FIG.

  For example, the aforementioned alloy composition thin film is prepared as the metal thin film 1 (step S1). Next, an exposure test of the alloy composition thin film is carried out for each of different types of corrosive gases (step S2), and the time change of the color image of the entire thin film is photographed by the CCD camera 2 (step S3). Thus, an alloy composition candidate that does not intersect the curves when the image data is developed in the rgb color space is selected (step S4).

  When processing for all necessary corrosive gases is completed (step S5), a composite gas test of the target gas is performed to confirm that there is no mutual influence. The alloy composition candidates are evaluated, and an alloy composition having no mutual influence is determined (step S6).

  Subsequently, the data creation unit 3 creates a calibration curve by performing tests with different gas concentrations for each corrosive gas with the determined alloy composition. Further, a plurality of movement distance data for each concentration indicating the result of obtaining the relationship between the movement distance of the tristimulus values moving on the calibration curve and the exposure time for each concentration is stored in the storage unit 4 (step S7).

  After the preparation for actual measurement is thus completed, the gas concentration calculation unit 5 moves the tristimulus value along the calibration curve described above under the exposure of the corrosive gas whose concentration is unknown. The exposure time is observed, and the concentration of the corrosive gas whose concentration is unknown is calculated based on the observation result and a plurality of movement distance data for each concentration stored in the storage unit 4 (step S8).

  According to the first embodiment, it is possible to easily and accurately measure the concentration of the gas to be measured in a short time. At the same time, it is possible to capture changes in the gas concentration over time and determine whether the gas concentration exceeds a reference value.

(Second Embodiment)
Next, a second embodiment of the present invention will be described.

  In addition, the same code | symbol is attached | subjected to the element which is common in the above-mentioned 1st Embodiment, and the overlapping description is abbreviate | omitted. Below, it demonstrates centering on a different part from the above-mentioned 1st Embodiment.

  FIG. 21 is a block diagram showing an example of the configuration of the environment measuring apparatus according to the second embodiment of the present invention.

  The environment measurement apparatus shown in FIG. 21 further includes an illumination 21, an image acquisition control unit 22, a holding unit with a rotation mechanism 23, and a light shielding box 24 in addition to the various elements 1 to 7 shown in FIG. The image acquisition control unit 22 is provided in the information processing apparatus 6, for example.

  The illumination 21 irradiates the metal thin film 1 with predetermined light suitable for photographing.

  The image acquisition control unit 22 automates photographing by the CCD camera 2 and realizes unattended image data collection. The image acquisition control unit 22 has a function of controlling the illumination 21 to be turned on only when the metal thin film 1 is photographed. For example, the image acquisition control unit 22 monitors the tristimulus values of the color at an arbitrary location on the metal thin film 1, and all the tristimulus values or any one of the tristimulus values is a certain amount or more from the value when the illumination is turned off. It is possible to control so that the illumination 21 is turned on and photographing is performed when there is a large change.

  The holding unit 23 with the rotation mechanism holds the metal thin film 1, and the surface of the metal thin film 1 is prevented so that light from the illumination 21 is reflected on the surface of the metal thin film 1 and enters the CCD camera 2. It has a rotating mechanism to tilt.

  The light shielding box 24 is installed as necessary, and houses the metal thin film 1, the CCD camera 2, the illumination 21, and the holding unit 23 with a rotation mechanism, and can block light in the measurement environment and the outside air. The same gas atmosphere can be maintained. The light shielding box 24 is provided with a plurality of ventilation openings A and fans B.

  In general, there is not always lighting suitable for photographing at a place where the environment is measured. When there is no illumination, the illumination 21 is provided. The illumination 21 does not need to be constantly turned on, but only needs to be turned on when photographing the color change of the metal thin film 1 with time. If always lit, there will be problems with the life of the lighting and the heat generated by the lighting. For example, in the case of shooting at an interval of 1 hour, the illumination timer may be set so that it is lit for 1 minute before and after the shooting time, as long as the lighting is on at the shooting time. In this case, since the lighting time is only 2/60 compared to the constant lighting, the life of the illumination 21 is 30 times longer. In addition, since the lighting time is short, heat generation can be reduced.

  Here, a method for further shortening the lighting time of the illumination 21 will be described. For example, the image acquisition control unit 22 acquires one RGB value of a camera image every second, for example. When the RGB value changes more than the RGB reference value, the illumination 21 is turned on, the metal thin film 1 is photographed, and the illumination 21 is turned off after photographing. In this way, the lighting time of the illumination 21 can be shortened to several seconds. Moreover, the lighting time of the illumination 21 can be shortened as much as possible by setting the acquisition interval of RGB values short. The RGB reference value is, for example, the RGB value when the illumination is turned off, and the illumination 21 is turned on when all the RGB values or any of the values fluctuate by, for example, 10%. In addition, since the suitable timing which lights the illumination 21 depends on the kind of illumination, it is not limited to said 10%. Further, the above control has an advantage that both the operations are not shifted because the lighting of the illumination 21 and the image acquisition of the CCD camera 2 are synchronized.

  On the other hand, the holding part 23 with the rotation mechanism that holds the metal thin film 1 has a rotation mechanism that can tilt the surface of the metal thin film 1. That is, since the surface of the metal thin film 1 is a mirror surface, on the CCD camera 2 side, an object existing in the vicinity or the front CCD camera 2 itself may be copied or an image may be lit. In such a case, the metal thin film 1 is slightly tilted by the rotation mechanism of the holding unit 23, thereby avoiding unnecessary objects from being copied or reflecting light. For example, a mechanism is adopted in which when the screw is loosened, the entire holding portion 23 is inclined. Thereby, the metal thin film 1 can be easily arrange | positioned in the state with little influence of light.

  Further, when there is a large variation in illumination of the measurement environment, it is desirable to provide the light shielding box 11 and to photograph the metal thin film 1 inside the light shielding box 11. In the light shielding box 11, a metal thin film 1, a CCD camera 2, an illumination 21, and a holding unit 23 with a rotation mechanism are housed. On the other hand, the information processing unit 6 including the image acquisition control unit 22 is placed outside the light shielding box 11. The light shielding box 11 has a plurality of ventilation openings A because the atmosphere must be able to freely enter and exit. These ventilation openings A are equipped with openable doors so that the influence of light on the metal thin film 1 can be reduced in various installation environments, and environmental measurements can be made with some of them open. It can be implemented. Further, a fan B may be attached to the light shielding box 11 to forcibly introduce / exhaust air into the box. In that case, the corrosive gas concentration in the box is the same as the measurement environment, but the wind speed increases. Therefore, when the introduced air directly hits the metal thin film 1, the absolute amount of corrosive gas in contact with the metal thin film increases, and corrosion occurs. Progresses quickly. For this reason, a windshield is provided so that the introduced air does not directly hit the metal thin film 1, or the relationship between the fan introduction atmospheric speed and the speed at which the tristimulus values of the color of the metal thin film 1 move in the three-dimensional color space. It is desirable to check and correct the measured value when determining the corrosive gas concentration.

  In the observation of the color image of the metal thin film 1, as described in the first embodiment, the image file captured by the CCD camera 2 is converted into RGB values, and the RGB values are normalized to a constant brightness. The converted rgb value is obtained. The rgb values are calculated as r = R / (R + G + B), g = G / (R + G + B), and b = B / (R + G + B), respectively. Thus, when the rgb value is adopted as the tristimulus value, there is an advantage that the difference in lightness at the time of color measurement can be easily canceled as compared with the case where the RGB value is adopted as the tristimulus value. Note that the shading box 11 may not be used if the illumination fluctuation in the measurement environment is not extremely large.

  According to the second embodiment, it is possible to further improve the accuracy of gas concentration measurement while suppressing the cost of illumination and the like.

(Third embodiment)
Next, a third embodiment of the present invention will be described.

  In the third embodiment, an environmental measurement element including a thin film having the same metal composition as the metal composition selected as the optimum calibration curve in the first or second embodiment described above, and this An environment measuring apparatus for measuring the concentration of corrosive gas using an environment measuring element will be described.

  First, a specific example of the environment measuring element will be described with reference to FIGS.

  Each of the environment measuring elements shown in FIGS. 22 to 25 includes a metal thin film having the same metal composition as the metal composition selected as the most suitable for forming the calibration curve. That is, the metal thin film used here is a curve that does not intersect with itself in a three-dimensional color space whose coordinate axis is the tristimulus value of the color when the color changes over time when exposed to a specific gas. It has a metal composition which forms. The metal thin film is formed, for example, by vapor deposition on a glass (or acrylic) substrate. Further, the metal thin film may be configured to be sandwiched between two glass (or acrylic) plates.

  FIG. 22 is a conceptual diagram showing a first example of the environment measuring element according to the present embodiment.

  This environment measuring element includes a metal thin film 31 for detecting a specific gas A on the surface thereof. The metal thin film 31 for detecting the specific gas A has a metal composition that forms a curve that does not intersect with itself in a three-dimensional color space when the color changes with time when exposed to the specific gas A (for example, sulfurous acid gas). According to this example, it is possible to realize an environment measuring element capable of measuring the concentration of the specific gas A with a simple configuration.

  FIG. 23 is a conceptual diagram showing a second example of the environment measuring element according to the present embodiment.

  The environment measuring element includes a standard white substrate 40 in addition to the above-described metal thin film 31 for detecting a specific gas A on the surface. The standard white substrate 40 is a substrate for color tone correction (for white balance), and serves as a reference when correcting the color tone of the specific gas A detection metal thin film 31 after photographing (when white balance is adjusted). It provides a white color. According to this example, it is possible to realize an environment measuring element capable of performing color tone correction in addition to measuring the concentration of the specific gas A with a simple configuration. Since there is a standard white substrate 40, the environmental measurement device for measuring the gas concentration using the environmental measurement element has a color tone sensitivity different from that of the environmental measurement device used when creating the calibration curve described above. Even in this case, the concentration of the specific gas A can be measured with high accuracy by correcting the color tone of the specific gas A detecting metal thin film 31 using the color tone of the standard white substrate 40.

  FIG. 24 is a conceptual diagram showing a third example of the environment measuring element according to the present embodiment.

  The environmental measuring element includes the specific gas A detecting metal thin film 31, the specific gas B detecting metal thin film 32, the specific gas C detecting metal thin film 33, and the specific gas D detecting metal thin film 34 on the surface thereof. Yes. That is, the metal thin films 31, 32, 33, and 34 are exposed to different types of specific gases, and show different color changes over time. The metal thin film 32 for detecting the specific gas B has a metal composition that forms a curve that does not intersect with itself in the three-dimensional color space when the color changes with time when exposed to the specific gas B (for example, hydrogen sulfide gas). . The metal thin film 33 for detecting the specific gas C has a metal composition that forms a curve in which the color change with time when exposed to the specific gas C (for example, nitrogen oxide gas) does not intersect with itself in the three-dimensional color space. Have. The metal thin film 34 for detecting the specific gas D has a metal composition that forms a curve in which the color change with time when exposed to the specific gas D (for example, chlorine gas) does not intersect with itself in the three-dimensional color space. According to this example, it is possible to realize an environment measuring element that can simultaneously measure the concentrations of four types of specific gases A, B, C, and D with a simple configuration.

  FIG. 25 is a conceptual diagram showing a fourth example of the environment measuring element according to the present embodiment.

  The environmental measuring element includes a standard white substrate 40 in addition to the specific gas A detecting metal thin film 31, the specific gas B detecting metal thin film 32, and the specific gas C detecting metal thin film 33 on the surface thereof. . The standard white substrate 40 provides a white color that serves as a reference when correcting the color tone of the specific gas A detection metal thin film 31, the specific gas B detection metal thin film 32, and the specific gas C detection metal thin film 33 after photographing. Is. According to this example, it is possible to realize an environment measuring element that can perform color tone correction in addition to simultaneously measuring the concentrations of the three types of specific gases A, B, and C with a simple configuration. Since there is a standard white substrate 40, the environmental measurement device for measuring the gas concentration using the environmental measurement element has a color tone sensitivity different from that of the environmental measurement device used when creating the calibration curve described above. Even if it exists, it is specified by correcting the color tone of the specific gas A detection metal thin film 31, the specific gas B detection metal thin film 32, and the specific gas C detection metal thin film 33 using the color tone of the standard white substrate 40. The concentrations of gases A, B, and C can be measured with high accuracy.

  The environment measurement element shown in FIGS. 21 to 25 may include an adhesion mechanism on the back surface. Examples of the adhesion mechanism include an adhesive mechanism such as a double-sided tape. If comprised in this way, an environmental measurement element can be easily attached to a desired measurement location via an adhesion mechanism, and can also be removed easily. The adhesion mechanism is not limited to an adhesive mechanism such as a double-sided tape.

  Moreover, the environment measurement element shown in FIGS. 21-25 may be accommodated in the package so that the entire environment measurement element is shielded from the atmosphere before use. The package may be a bag or a wrap as long as it can be shielded from the atmosphere. Note that the package is not limited to these examples.

  FIG. 26 shows an example of the configuration of an environment measuring apparatus that measures the concentration of corrosive gas using the environment measuring element according to the present embodiment.

  The environment measurement device shown in FIG. 26 has the environment measurement element 101 (for example, one of the environment measurement elements shown in FIGS. 21 to 25) exposed to a specific gas whose concentration is unknown. An image measuring unit 200 that captures a color change of the upper metal thin film with a CCD camera, and a moving distance by which tristimulus values of the captured color move along the calibration curve in the three-dimensional color space described above. An information processing unit 106 for observing the exposure time and obtaining the concentration of the specific gas whose concentration is unknown from the observation result and a plurality of movement distance data for each concentration is provided, and an output device 107 is provided. The calibration curve and the plurality of movement distance data for each concentration in this case are information corresponding to the metal thin film on the environment measurement element 101, and are created by the method described in the first embodiment or the second embodiment. It has been done.

  The information processing unit 106 may be, for example, a personal computer or a server device. In this case, the image measurement unit 200 and the information processing unit 106 are connected through a wireless or wired communication medium so that information captured by the image measurement unit 200 is transmitted to the information processing unit 106 through the communication medium. It has become. Examples of communication media include a LAN and a USB cable. The information processing unit 106 may be installed anywhere as long as communication with the image measurement unit 200 is possible. Since the information processing unit 106 can be installed separately from the image measurement unit 200, the information processing unit 106 can be downsized.

  The information processing unit 106 may be built in the image measurement unit 200. By incorporating the information processing unit 106 into the image measuring unit 200 as, for example, a chip-shaped microcomputer, the information processing unit 106 can be reduced in size, and a compact and handy environment measurement device can be realized. Become.

  The image measurement unit 200 includes an illumination 121 and a CCD camera 102, and the information processing unit 106 includes a data creation unit 103, a storage unit 104, and a gas concentration calculation unit 105.

  The illumination 121 and the CCD camera 102 in FIG. 26 have functions equivalent to those of the illumination 21 and the CCD camera 2 in FIG. Similarly, the data creation unit 103, the storage unit 104, and the gas concentration calculation unit 105 in FIG. 26 have the same functions as the data creation unit 3, the storage unit 4, and the gas concentration calculation unit 5 in FIG. It is. Further, the output device 107 in FIG. 26 has the same function as the output device 7 in FIG. However, the data creation unit 103 further includes an area determination unit 301 and a color tone correction unit 302 as described later. 26 may further include an element having functions equivalent to those of the image acquisition control unit 22, the rotation mechanism holding unit 23, and the light shielding box 24 in FIG. The CCD camera 102 may be replaced with a camera equipped with a CMOS sensor instead of a CCD sensor.

  A light shielding cover 201 is provided on the environment measurement element 101 side of the image measurement unit 200. With this light shielding cover 201, it is possible to correctly observe the color tone of the metal thin film or the like on the environment measuring element 101 by using only the illumination light provided in the main body of the image measuring unit 200 while preventing the incident of extra light. As a result, the accuracy of gas concentration measurement can be improved.

  The area determination unit 301 is based on, for example, information stored in advance in the database of the storage unit 4 or a difference in color tone shown in an image photographed by the CCD camera 102, or a metal thin film area or a standard white substrate in the image. Has a function of determining the position of the region.

  When the color tone correction (white balance adjustment) of the image is required, the color tone correction unit 302 is different from, for example, the environment measurement device used here when creating the calibration curve or the like. Used when having color tone sensitivity. The color tone correction unit 302 corrects the color tone of the metal thin film photographed by the CCD camera 102 using the color tone of the standard white substrate photographed by the CCD camera 102, and the color change accurately follows the calibration curve described above. Has a function to enable observation. The color tone correction unit 302 may be provided in the CCD camera 102, for example, instead of being provided in the data creation unit 103.

  Since a specific method for measuring the concentration of a gas whose concentration is unknown has already been described in the first embodiment, the description thereof is omitted here.

  According to the third embodiment, with a simple configuration, it is possible to simultaneously measure the concentration of one type or a plurality of types of specific gases according to the application, or to perform color tone correction as necessary. It is possible to provide an environmental measurement element. Moreover, it is possible to provide an environment measurement device that can perform concentration measurement of a specific gas with an unknown concentration with high accuracy using such an environment measurement element and can perform color tone correction as necessary. it can.

  The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  DESCRIPTION OF SYMBOLS 1 ... Metal thin film, 2 ... CCD camera, 3 ... Data preparation part, 4 ... Memory | storage part, 5 ... Gas concentration calculating part, 6 ... Information processing part, 7 ... Output device, 11 ... Calibration curve, 12 ... Allowable error range , 13: Determinable data, 14: Non-determinable data, 21: Illumination, 22 ... Image acquisition control unit, 23 ... Holding unit with rotating mechanism, 24 ... Shading box, 31 ... Metal thin film for detecting specific gas A, 32 ... Specific Metal thin film for detecting gas B, 33 ... Metal thin film for detecting specific gas C, 34 ... Metal thin film for detecting specific gas D, 40 ... Standard white substrate, 101 ... Environmental measuring element, 102 ... CCD camera, 103 ... Data creation unit, DESCRIPTION OF SYMBOLS 104 ... Memory | storage part, 105 ... Gas concentration calculating part, 106 ... Information processing part, 107 ... Output device, 200 ... Image measuring part, 201 ... Light-shielding cover, 301 ... Area | region determination part, 302 ... Color tone correction part.

Claims (19)

The color change of the first element is photographed with an imaging device in a state where the first element exposed to at least one specific gas and the color changes with time is exposed to the specific gas having a known concentration. The three-stimulus value of the color of the first element is a curve corresponding to a trajectory moving in a three-dimensional color space having three coordinate axes in which one coordinate axis corresponds to each stimulus value, and the three-dimensional color A plurality of movement distance data for each concentration obtained by determining the relationship between the movement distance of the tristimulus values of the color moving on the calibration curve and the exposure time for each concentration, using a curve that does not intersect in the space as a calibration curve. When,
A second element having the same composition as the first element is exposed to the specific gas whose concentration is unknown, and tristimulus values of the color of the second element are applied to the calibration curve in the three-dimensional color space. A method for measuring an environment, comprising: obtaining a concentration of a specific gas whose concentration is unknown based on an observation result obtained by observing a moving distance moving along with an exposure time.   Between the observation results and the plurality of movement distance data for each concentration, the movement distance at the same exposure time is compared to determine the movement distance ratio, and based on the ratio, the concentration is calculated from a plurality of known concentrations. 2. The environment measuring method according to claim 1, wherein the concentration of the unknown specific gas is obtained.   The tristimulus values of the color in the three-dimensional color space are expressed by equations r = R / (R + G + B), g = G / (R + G + B), b = when the tristimulus values in the RGB color system are R, G, B. It is represented by the value obtained from B / (R + G + B), The environment measuring method of Claim 1 or 2 characterized by the above-mentioned.   The calibration curve in the three-dimensional color space is formed in a tubular shape with a certain allowable width based on a trajectory in which the tristimulus values of the color move. Environmental measurement method.   By observing a change in the moving distance in which the tristimulus value of the color of the second element moves along the calibration curve in the three-dimensional color space, the time change of the concentration of the specific gas whose concentration is unknown The environment measurement method according to any one of claims 1 to 4, wherein   Whether the concentration of the specific gas whose concentration is unknown exceeds a reference value by comparing the movement distance at the same exposure time between at least one of the observation results and the plurality of movement distance data by concentration. The environmental measurement method according to claim 1, wherein the environmental measurement method is determined.   An alloy composition showing a color change with time suitable for forming the calibration curve is selected, and the concentration of a specific gas is measured using an element in which a film of the selected alloy composition is arranged on a substrate. Item 7. The environmental measurement method according to any one of Items 1 to 6. Tristimulus values of the color of the first element captured by the imaging device in a state where the first element, which is exposed to at least one kind of specific gas and changes its color with time, is exposed to the specific gas, corresponds to each stimulus value. A curve corresponding to a trajectory that moves in a three-dimensional color space having three coordinate axes corresponding to one coordinate axis and that does not intersect in the three-dimensional color space is defined as a calibration curve. Storage means for storing, in a storage medium, a plurality of movement distance data for each concentration obtained by obtaining the relationship between the movement distance of the tristimulus values of the color moving on the calibration curve and the exposure time for each concentration;
A holding part for mounting and replacing a second element having the same composition as the first element;
Illumination that shines predetermined light on the second element;
An imaging device capable of photographing the color change of the second element;
A moving distance by which the tristimulus values of the color of the second element move along the calibration curve in the three-dimensional color space in a state where the second element is exposed to a specific gas whose concentration is unknown; Gas concentration calculating means for observing the exposure time and obtaining the concentration of the specific gas whose concentration is unknown based on the observation result and the plurality of movement distance data for each concentration of the storage means Environmental measuring device.   The environment measuring apparatus according to claim 8, further comprising a control unit that controls the illumination so that the illumination is turned on only when the second element is photographed.   The control means monitors the tristimulus values of the color at an arbitrary position of the second element, and all or any of these tristimulus values have greatly changed by a certain amount or more from the value when the illumination is turned off The environment measuring apparatus according to claim 9, wherein control is performed so that the illumination is sometimes turned on and photographing is performed.   The environment measuring apparatus according to claim 8, wherein the holding unit includes a rotation mechanism that tilts a surface of the second element.   The second element, the holding unit, and the imaging device are housed in a light shielding box that can block light in a measurement environment and maintain the same gas atmosphere as the outside air, and the color change of the second element 9. The environment measuring apparatus according to claim 8, wherein the camera can be photographed under a certain illumination condition in the light shielding box.   An environmental measurement element having a metal thin film on a surface, the color of which changes with time when exposed to a specific gas, wherein the metal thin film is exposed to the specific gas and changes its color with time. An environment measuring element having a metal composition that forms a curve that does not intersect with itself in a three-dimensional color space having a tristimulus value of color as a coordinate axis.   The environment measuring element according to claim 13, wherein a plurality of the metal thin films are provided, and each of the metal thin films is exposed to different types of specific gases to show different color changes with time.   The environment measuring element according to claim 13, further comprising a standard white substrate for color tone correction.   An image measuring means having an imaging device for photographing the color change of the metal thin film in a state where the environment measuring element according to any one of claims 13 to 15 is exposed to a specific gas whose concentration is unknown. , Observing a moving distance and an exposure time in which tristimulus values of colors photographed by the imaging device move along the curve in the three-dimensional color space, and the specific gas whose concentration is unknown from the observation result And an information processing means for obtaining the concentration of the environment. The environmental measurement element includes a standard white substrate for color correction,
The environment measuring device according to claim 16, further comprising means for correcting a color tone of the metal thin film photographed by the imaging device using a color tone of the standard white substrate photographed by the imaging device. . The image measurement means and the information processing means are connected through a wireless or wired communication medium,
The environment measurement apparatus according to claim 16 or 17, wherein the information photographed by the image measurement unit is transmitted to the information processing unit through the communication medium.   The environment measuring device according to claim 16 or 17, wherein the information processing means is built in the image measuring means.

Images