JP2012057976A - Spectrum measurement device and spectrum measurement method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spectrum measurement device and a spectrum measurement method that eliminate the need to install a color filter, a reference object, etc., and acquire a spectrum of environmental light in a periphery of a moving body such as a vehicle.SOLUTION: The spectrum measurement device 11 recognizes an object to be measured based upon spectrum data on observation light detected by a spectrum sensor 20 mounted on a vehicle 10. The spectrum measurement device 11 includes a meteorological information acquisition device 14 which acquires meteorological information about a periphery of the vehicle 10, and an environmental light spectrum estimation part 26 which estimates a spectrum of environmental light that the object to be measured is irradiated with based upon the meteorological information, and additionally takes an influence of the spectrum of the environmental light, estimated by the environmental light spectrum estimation part 26, into consideration for recognition of the object to be measured based upon the spectrum data of the observation light.

Description

  The present invention relates to a spectrum measuring apparatus and a spectrum measuring method for recognizing a measuring object from a spectrum of the measuring object measured by a spectrum sensor mounted on a vehicle, particularly a moving body such as an automobile.

  In recent years, in a mobile body such as an automobile, practical application of a technique for recognizing a measurement target based on a spectrum of the measurement target measured by a spectrum sensor mounted on the mobile body has been studied.

  By the way, since the spectrum sensor is a sensor that measures the spectrum of reflected light reflected by the measurement target, the measured spectrum directly reflects the influence of the spectrum of the ambient light irradiated on the measurement target. Become. This ambient light changes due to the influence of sunlight, illumination light, etc. irradiated on the measurement object, and also changes due to the influence of the weather, an object around the measurement object, and the like. Therefore, in recognition of the measurement object based on the spectrum, the improvement of the recognition accuracy does not remain unless the influence of the ambient light irradiated on the measurement object is taken into consideration.

  For these reasons, a technique for acquiring a spectrum included in ambient light has been proposed, and an example thereof is described in Patent Document 1. In the spectrum measuring apparatus described in Patent Document 1, color filters such as R, G, and B are attached to a colorimeter to measure environmental light, and the spectral characteristics of the environmental light source are obtained from the colorimetric data. . Then, based on the obtained spectral characteristics of the environmental light source and the spectral characteristics of the standard light source, data indicating a matrix for correcting the environmental light source is generated. After that, when the object color of the object under the standard light source and the object color stored in the image memory is displayed on the color monitor calibrated with the standard light source, the data indicating the generated matrix for correcting the environmental light source Color correction based on As a result, the object color of the article displayed on the color monitor can be displayed on the color monitor as the object color of the environmental light source, not the object color of the standard light source.

Japanese Patent Laid-Open No. 2004-070228

  According to the spectrum measuring apparatus, although the spectrum of the environmental light source can be acquired by a colorimeter equipped with color filters such as R, G, and B, for that purpose, the measuring apparatus also irradiates with ambient light. It is necessary to provide a color filter having a known spectral characteristic at a position to be separated from the spectrum sensor. However, in the case of a moving body such as an automobile, the range in which the ambient light is irradiated, such as the vehicle space, is limited. Therefore, such a color filter or any reference object corresponding thereto is limited to the vehicle body. If it is installed in the range, it is unavoidable that the design of the automobile is deteriorated and the cost is disadvantageous.

  The present invention has been made in view of such circumstances, and its purpose is to make it possible to obtain a spectrum of ambient light in the vicinity of a moving body such as a vehicle without installing a color filter or a reference object. An object of the present invention is to provide a spectrum measuring apparatus and a spectrum measuring method.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
In order to solve the above-mentioned problem, the invention according to claim 1 is a spectrum measuring apparatus for recognizing a measurement object based on spectrum data of observation light detected by a spectrum sensor mounted on a moving body, A meteorological information acquisition unit for acquiring meteorological information around the moving body; and an ambient light spectrum estimation unit for estimating the spectrum of the ambient light irradiated on the measurement object based on the weather information, and the spectral data of the observation light In summary, the influence of the spectrum of the ambient light estimated by the ambient light spectrum estimator is added to the recognition of the measurement object based on.

  According to such a configuration, as the spectrum of the ambient light irradiated to the measurement target, the weather (temperature, atmospheric pressure, humidity, and so on) before the measurement target is irradiated with the spectrum of the light source emitted from the light source such as the sun or illumination. A spectrum that has changed under the influence of cloudiness, precipitation, etc.) is estimated. As a result, the ambient light spectrum can be acquired without providing a device or the like for measuring the ambient light spectrum irradiated to the measurement object in the vehicle space of the automobile as the moving body. That is, since it is not necessary to provide a moving object with an apparatus for measuring observation light, for example, a reference object such as a reflector with a known spectrum, it is possible to increase the degree of freedom related to the design of the moving object, It is also effective in reducing costs.

In addition, the spectrum measuring apparatus can appropriately maintain the recognition accuracy of the measurement object by estimating the spectrum of the ambient light in this way.
According to a second aspect of the present invention, in the spectrum measuring apparatus according to the first aspect, the ambient light spectrum estimation unit is a parameter that indicates light easiness from the weather information acquired by the weather information acquisition unit. The gist is to estimate the atmospheric state and estimate the spectrum of the ambient light irradiated to the measurement object by a calculation including information on the estimated atmospheric state.

  Usually, the spectrum of ambient light varies greatly depending on the atmospheric conditions, especially the moisture content in the atmosphere. For this reason, as in this configuration, by calculating the ambient light spectrum in consideration of the atmospheric conditions, it is possible to suitably estimate the ambient light spectrum corresponding to various weather conditions. become able to. As a result, the spectrum measuring apparatus can recognize the measurement object with high accuracy.

  The invention according to claim 3 is the spectrum measuring apparatus according to claim 1, further comprising a spectrum storage unit in which the spectrum of the ambient light is stored in association with the weather information, and the ambient light spectrum estimation unit The gist is to select a spectrum obtained by searching the spectrum storage unit based on the weather information acquired by the weather information acquisition unit as the spectrum of the ambient light to be estimated.

  According to such a configuration, it becomes possible to retrieve and acquire the spectrum of the ambient light corresponding to each weather information from the spectrum storage unit based on the input of the weather information, and thus adapt to various weather conditions. The spectrum of ambient light can be easily estimated. Thereby, also as a spectrum measuring device, it becomes possible to recognize the measurement object accurately and easily.

  The invention according to claim 4 is the spectrum measurement apparatus according to any one of claims 1 to 3, further comprising a position detection unit that acquires a current position of the mobile body, wherein the ambient light spectrum estimation unit is The gist of the present invention is to estimate the spectrum of the ambient light irradiated to the measurement object by further taking into account the current position of the moving body acquired by the position detection unit.

  According to such a configuration, even if the ambient light spectrum varies depending on the position of the moving body, the ambient light spectrum corresponding to the current position of the moving body is accurately estimated. For example, since the relative positional relationship between the moving body and the light source can be known from the current position of the moving body, the change in the spectrum of the ambient light based on the direction and angle of the light from the light source irradiated on the moving body can be obtained. become. As a result, the spectrum measuring apparatus can recognize the measurement object with higher accuracy.

  The invention according to claim 5 is the spectrum measurement device according to claim 4, further comprising a time acquisition unit for acquiring a current time, wherein the ambient light spectrum estimation unit is configured to detect the observation light irradiated on the measurement target. The gist of the present invention is to estimate the spectrum by further taking into account the current time acquired by the time acquisition unit.

  According to such a configuration, the spectrum of observation light suitable for the current time is preferably estimated. For example, the spectrum of observation light can be based on sunlight during daytime, and the spectrum of observation light can be based on street light (artificial lighting) at night.

  The invention according to claim 6 is the spectrum measuring device according to claim 4 or 5, further comprising a map information storage device having information on the spectrum of the artificial light source respectively associated with the map information, wherein the ambient light spectrum The estimation unit acquires information on the spectrum of the corresponding artificial light source from the map information storage device based on the current position acquired by the position detection unit, and takes into account the influence of the acquired spectrum of the artificial light source The gist is to estimate the spectrum of the ambient light irradiated to the measurement object.

  According to such a configuration, since the spectrum of the ambient light is estimated in consideration of the influence of the spectrum of the artificial light source (artificial illumination), the spectrum of the ambient light irradiated to the measurement target can be estimated more suitably. It becomes like this.

  According to a seventh aspect of the present invention, in the spectrum measurement device according to the sixth aspect, the map information storage device further includes information on the surrounding environment that affects the spectrum of the ambient light for each position, The ambient light spectrum estimation unit acquires information on the corresponding surrounding environment from the map information storage device based on the current position acquired by the position detection unit, and considers the acquired information on the surrounding environment in the measurement. The gist is to estimate the spectrum of ambient light irradiated to the object.

  For example, even if the light source is a single sun, if there is a glass-walled building around the driving environment, the reflected light from the glass-walled building will also be irradiated to the measurement object. A plurality of lights are input to the object. As described above, depending on the traveling environment, the spectrum of the ambient light applied to the measurement target may be affected by the traveling environment. Therefore, according to such a configuration, in order to estimate the spectrum of the ambient light in consideration of the influence of the traveling environment on the spectrum, it is possible to more accurately estimate the spectrum of the ambient light irradiated to the measurement target. Will be able to.

The invention according to claim 8 is the spectrum measuring apparatus according to any one of claims 4 to 7, wherein the ambient light spectrum estimation unit is provided at a position away from the moving body, and the moving body. And the ambient light spectrum estimation unit is provided with a communication unit that wirelessly communicates with each other, and the ambient light spectrum estimation unit receives information indicating the current position transmitted from the mobile body via the communication unit. The gist is to receive and estimate the spectrum of the ambient light at the received position and to transmit the estimated spectrum of the ambient light to the moving body via the communication unit.

  According to such a configuration, since the ambient light spectrum estimation unit is provided outside the mobile body such as a base station, it is easy to improve the processing capability as an apparatus for estimating the ambient light spectrum. That is, it is easy to improve calculation capacity and increase storage capacity. In addition, since the configuration on the moving body side is simplified, it is possible to reduce the number of parts, reduce the size, and the like, and it becomes easier to reduce costs.

In addition, it is good also as a structure which provides an ambient light spectrum estimation part in the mobile body side, and uses an external environment light spectrum estimation part only when mutual communication is possible.
In order to solve the above problem, the invention according to claim 9 is a spectrum measurement method for recognizing a measurement object based on spectrum data of observation light detected by a spectrum sensor mounted on a moving body, A meteorological information obtaining step for obtaining meteorological information around the moving body, and an ambient light spectrum estimating step for estimating the spectrum of the ambient light irradiated to the measurement object based on the obtained weather information, the spectrum of the observed light The gist is to consider the influence of the estimated spectrum of the ambient light to the recognition of the measurement object performed based on the data.

  According to such a method, as the spectrum of ambient light irradiated to the measurement target, the weather (temperature, atmospheric pressure, humidity, and so on) before the measurement target is irradiated with the spectrum of the light source emitted from the light source such as the sun or illumination. A spectrum that has changed under the influence of cloudiness, precipitation, etc.) is estimated. As a result, the ambient light spectrum can be acquired without providing a device or the like for measuring the ambient light spectrum irradiated to the measurement object in the vehicle space of the automobile as the moving body. That is, since it is not necessary to provide a moving object with an apparatus for measuring observation light, for example, a reference object such as a reflector with a known spectrum, it is possible to increase the degree of freedom related to the design of the moving object, It is also effective in reducing costs.

In addition, according to this spectrum measurement method, the spectrum of the ambient light is thus estimated, so that the recognition accuracy of the measurement object can be suitably maintained.
According to a tenth aspect of the present invention, in the spectrum measurement method according to the ninth aspect, the ambient light spectrum estimating step estimates an atmospheric state that is a parameter indicating light passage from the acquired weather information. The gist of the present invention is to estimate the spectrum of the ambient light irradiated to the measurement object by a calculation that takes into account information related to the estimated atmospheric state.

  Usually, the spectrum of ambient light varies greatly depending on the atmospheric conditions, especially the moisture content in the atmosphere. Therefore, as in this method, the ambient light spectrum corresponding to various weather conditions can be suitably estimated by calculating the ambient light spectrum in consideration of the atmospheric condition. become able to.

  According to an eleventh aspect of the present invention, in the spectrum measurement method according to the ninth aspect, the mobile body includes a spectrum storage unit in which the information on the spectrum of the ambient light is stored in association with the weather information. The gist of the ambient light spectrum estimation step is to select a spectrum obtained by searching the spectrum storage unit based on the acquired weather information as the spectrum of the ambient light to be estimated.

  According to such a method, it becomes possible to retrieve and acquire the spectrum of the environmental light corresponding to each weather information from the spectrum storage unit based on the input of the weather information, and thus adapt to various weather conditions. The spectrum of ambient light can be easily estimated. As a result, this spectrum measurement method can easily and accurately recognize the measurement target.

  The invention according to claim 12 is the spectrum measurement method according to any one of claims 9 to 11, further comprising a position detection step of acquiring a current position of the mobile body, wherein the ambient light spectrum estimation step includes: The gist of the present invention is to estimate the spectrum of the ambient light irradiated to the measurement object by further taking into account the current position acquired by the position detection step.

  According to such a method, even when the ambient light spectrum varies depending on the position of the moving body, the ambient light spectrum corresponding to the current position of the moving body is accurately estimated. For example, since the relative positional relationship between the moving body and the light source can be known from the current position of the moving body, the change in the spectrum of the ambient light based on the direction and angle of the light from the light source irradiated on the moving body can be obtained. become. Thereby, also as a spectrum measurement method, a measurement object can be recognized with higher accuracy.

  The invention according to claim 13 is the spectrum measurement method according to claim 12, further comprising a time acquisition step of acquiring a current time, wherein the ambient light spectrum estimation step includes a spectrum of ambient light irradiated to the measurement target The gist is to further estimate the current time acquired in the time acquisition step.

  According to such a method, the spectrum of the observation light suitable for the current time is preferably estimated. For example, the spectrum of observation light can be based on sunlight during daytime, and the spectrum of observation light can be based on street light (artificial lighting) at night.

  According to a fourteenth aspect of the present invention, in the spectrum measurement method according to the twelfth or thirteenth aspect, the mobile body further includes a map information storage device having information on a spectrum of an artificial light source respectively associated with the map information. The ambient light spectrum estimation step acquires information on the spectrum of the corresponding artificial light source from the map information storage device based on the acquired current position, and considers the influence of the acquired spectrum of the artificial light source. Then, the gist is to estimate the spectrum of the ambient light irradiated on the measurement object.

  According to such a method, since the estimation of the ambient light spectrum is performed by taking into account the influence of the spectrum of the artificial light source (artificial lighting), the ambient light spectrum irradiated on the measurement target is more preferably estimated. Will be able to.

  According to a fifteenth aspect of the present invention, in the spectrum measurement method according to the fourteenth aspect, the map information storage device further includes information on the surrounding environment that affects the spectrum of ambient light for each position, The ambient light spectrum estimation step acquires information on the corresponding surrounding environment from the map information storage device based on the acquired current position, and irradiates the measurement target with information on the acquired surrounding environment. The gist is to estimate the ambient light spectrum.

  For example, even if the light source is a single sun, if there is a glass-walled building around the driving environment, the reflected light from the glass-walled building will also be irradiated to the measurement object. A plurality of lights are input to the object. As described above, depending on the traveling environment, the spectrum of the ambient light applied to the measurement target may be affected by the traveling environment. Therefore, according to such a method, in order to estimate the spectrum of the ambient light in consideration of the influence of the traveling environment on the spectrum, the spectrum of the ambient light irradiated to the measurement target is more accurately estimated. Will be able to.

According to a sixteenth aspect of the present invention, in the spectrum measurement method according to any one of the twelfth to fifteenth aspects, the ambient light spectrum estimation step is processed by a processing device provided at a position away from the moving body. In addition, the mobile unit and the processing device are provided with a communication unit that performs wireless communication with each other, and the ambient light spectrum estimation step indicates a current position transmitted from the mobile unit via the communication unit. The gist is to receive the information, estimate the ambient light spectrum at the received position, and transmit the estimated ambient light spectrum to the moving body via the communication unit.

  According to such a method, since the ambient light spectrum estimation step is processed by a processing device provided outside the mobile body such as a base station, the processing capability of the device that estimates the ambient light spectrum using this method. It becomes easy to improve. That is, it is easy to improve the processing capability of the ambient light spectrum estimation step because it is easy to improve the calculation capability of the processing device and increase the storage capacity. In addition, since the configuration on the movable body side can be simplified, it is possible to reduce the number of parts, reduce the size, and the like, and it is easier to reduce the cost.

  In addition, it is good also as a method of providing an ambient light spectrum estimation process also in the mobile body side, and using an external environment light spectrum estimation process only when communication is possible.

The block diagram which shows the schematic structure about 1st Embodiment which actualized the vehicle provided with the spectrum measuring apparatus concerning this invention. The figure which shows the ambient light spectrum data memorize | stored in association with weather information etc. by the spectrum measuring apparatus of the embodiment by a list. The flowchart which shows the process of the spectrum estimation process of the ambient light by the spectrum measuring apparatus of the embodiment. The block diagram which shows the schematic structure about 2nd Embodiment which actualized the vehicle provided with the spectrum measuring apparatus concerning this invention. The figure which shows the theoretical light spectrum data memorize | stored for every kind of light source in the spectrum measuring apparatus of the embodiment by a list. The flowchart which shows the process of the spectrum estimation process of the ambient light by the spectrum measuring apparatus of the embodiment. The flowchart which shows the process of the process about the process which calculates the basic light spectrum in the spectrum estimation process of the embodiment. The flowchart which shows the process of the process about the process which calculates the correction | amendment light spectrum in the spectrum estimation process of the embodiment. The block diagram which shows the schematic structure about 3rd Embodiment which actualized the vehicle provided with the spectrum measuring apparatus concerning this invention. The flowchart which shows the process of the spectrum estimation process of the ambient light by the spectrum measuring apparatus of the embodiment. The flowchart which shows the process of the process about the process which calculates the synthetic light spectrum in the spectrum estimation process of the embodiment. The flowchart which shows the process of the process about the surrounding environment spectrum in the spectrum estimation process of the embodiment. The block diagram which shows the schematic structure about 4th Embodiment which actualized the vehicle provided with the spectrum measuring apparatus concerning this invention. The flowchart which shows the process of the spectrum estimation process of the ambient light by the spectrum measuring apparatus of the embodiment. The block diagram which shows the schematic structure about 5th Embodiment which actualized the vehicle provided with the spectrum measuring apparatus concerning this invention. The flowchart which shows the process of the spectrum estimation process of the ambient light by the spectrum measuring apparatus of the embodiment. The block diagram which shows the schematic structure about 6th Embodiment which actualized the vehicle provided with the spectrum measuring apparatus concerning this invention. The flowchart which shows the process of the spectrum estimation process of the ambient light by the spectrum measuring apparatus of the embodiment. The flowchart which shows the process of the process about other embodiment which actualized the spectrum correction process of the observation light by the spectrum measuring device concerning this invention.

(First embodiment)
1st Embodiment which actualized the vehicle 10 provided with the spectrum measuring apparatus concerning this invention is described according to FIGS. 1-3. FIG. 1 is a block diagram schematically showing the configuration of a vehicle 10 provided with a spectrum measuring device 11.

  As shown in FIG. 1, the spectrum measuring apparatus 11 is mounted on a vehicle 10 as a moving body such as an automobile. That is, the vehicle 10 is provided with a spectrum measurement device 11 that acquires light information including visible light and invisible light outside the vehicle and recognizes a measurement target. Further, the vehicle 10 reflects the recognition information output from the spectrum measurement device 11 to the passenger of the vehicle 10 and the recognition information output from the spectrum measurement device 11 to vehicle control. A vehicle control device 13 is provided.

  The human machine interface 12 communicates a vehicle state and the like to a passenger, particularly a pilot, through light, color, sound, and the like, and an operation device such as a push button or a touch panel is provided so that the intention of the passenger is input through a button or the like. It is a known interface device provided.

  The vehicle control device 13 is one of the control devices mounted on the vehicle, and can transmit necessary information to and from other various control devices mounted on the vehicle, such as an engine control device. Connected to each other directly or via an in-vehicle network. When the recognition information or the like is input from the connected spectrum measurement device 11, the vehicle control device 13 transmits the recognition information to other various control devices, and is requested according to the measurement target indicated by the recognition information. Driving assistance is executed by the vehicle 10.

  By the way, in the present embodiment, the measurement object is recognized from the spectrum of the observation light of the measurement object, and the influence of the spectrum of the ambient light irradiated to the measurement object is taken into account in the recognition of the measurement object. First, a configuration for recognizing a measurement object from spectrum data of observation light will be described with reference to FIG.

  The spectrum measuring device 11 is provided with a spectrum sensor 20 that detects spectrum data of the observation light, and a spectrum data processing device 21 that receives the spectrum data of the observation light detected by the spectrum sensor 20 and processes the data.

  The spectrum sensor 20 separates observation light as light composed of visible light and invisible light into a predetermined wavelength band. Then, the observation light is wavelength information as information indicating each wavelength constituting the spectral wavelength band, and light intensity information as information indicating the light intensity of the spectral observation light at each wavelength for each wavelength. And output as spectrum data.

The spectrum data processing device 21 is configured mainly with a microcomputer having, for example, an arithmetic device and a storage device. The spectrum data processing device 21 receives spectrum data of observation light detected by the spectrum sensor 20. The spectrum data processing device 21 recognizes the observed measurement object and outputs the result based on the spectrum data of the input observation light, and outputs the result to the human machine interface 12 and the vehicle control device 13. .

  The spectrum data processing device 21 includes a storage device 22 in which spectrum data of each of a plurality of measurement objects is stored as dictionary data, and an operation for recognizing the measurement object based on comparing the observation light spectrum data with the dictionary data. A device 25 is provided.

  The storage device 22 stores spectrum data of a plurality of measurement objects as dictionary data (not shown). The storage device 22 includes all or part of a storage area provided in a known storage device, and spectrum data as dictionary data is stored in the storage area. The dictionary data is made up of spectrum data of measurement objects as objects to be recognized, and is prepared in advance for the number of measurement objects to be recognized. That is, the storage area as the storage device 22 may be composed of storage areas of one or a plurality of storage devices so that a storage capacity capable of storing a plurality of dictionary data prepared in advance is satisfied.

  The computing device 25 is provided with a spectrum recognition unit 27 for recognizing a measurement object from spectrum data of observation light. The spectrum recognizing unit 27 recognizes a measurement target from the spectrum data of the observation light based on a comparison operation that compares the spectrum data of the observation light subjected to predetermined processing and the like with dictionary data. That is, the measurement object is recognized by the spectrum recognition unit 27, and the recognition result is output to the human machine interface 12 and the vehicle control device 13 as the measurement object recognition result by the spectrum measurement device 11.

Next, a configuration for estimating the spectrum of ambient light irradiated on the measurement target will be described.
The spectrum measurement device 11 further includes a weather information acquisition device 14 as a weather information acquisition unit that acquires weather information that is an external environment of the vehicle 10, and specifies the current position of the vehicle 10 and based on the specified current position. A position detection unit for selecting and acquiring map information and a car navigation 15 as a time acquisition unit are provided.

  The meteorological information acquisition device 14 acquires meteorological information of the external environment of the vehicle 10, for example, each information corresponding to each item of temperature, atmospheric pressure, humidity, cloud cover, and precipitation, and the acquired meteorological information is subjected to spectrum data processing. Output to the device 21. In the present embodiment, the weather information acquisition device 14 acquires weather information such as temperature, atmospheric pressure, humidity, cloud cover, and precipitation in the travel region of the vehicle 10 based on a weather information notification service notified by wireless communication. is doing. That is, the weather information is reported to the vehicle 10 by data communication using a communication line such as a mobile phone or data communication using broadcasting such as television, radio, and beacon. It is acquired by the information acquisition device 14.

  The car navigation 15 detects the current position of the vehicle 10 and informs the passenger and the like by showing the current position on the map of the display panel, and outputs the detected position information of the vehicle 10 to the spectrum data processing device 21. To do. In addition, the car navigation 15 acquires the current time, indicates the current time to the passenger by displaying it on the display panel, and outputs the acquired current time to the spectrum data processing device 21. The car navigation 15 has a GPS (Global Positioning System) and the like, and acquires the current position and the current time using the GPS. In addition, the car navigation 15 specifies the current position by combining the position information acquired from the map equipment, the speed of the vehicle 10 or the ground equipment that reports the position information, in addition to the position information based on the GPS. May be. In addition, the current time may be acquired from a separately provided clock as long as the time calibrated within a predetermined error can be acquired.

The storage device 22 further includes an ambient light spectrum list 23 as a spectrum storage unit.
Is stored. FIG. 2 is a diagram showing the ambient light spectrum list 23 in a list format. As shown in FIG. 2, the ambient light spectrum list 23 includes a plurality of ambient light spectrum data LS01, LS02, LS03,.

  By the way, it is generally known that the spectrum of ambient light irradiated to the measurement object changes depending on time, position, and atmospheric conditions even if the light source is sunlight. For example, the spectrum of ambient light based on sunlight changes according to the time because the red component is strong at dawn and evening, but is not irradiated at night. Moreover, since the spectrum of the environmental light based on sunlight changes also with the irradiation angle of the sun with respect to a measuring object, the spectrum of sunlight changes according to the current position of the vehicle 10. Furthermore, the spectrum of ambient light based on sunlight has a high shielding rate due to clouds and rain, and changes greatly depending on the state of moisture contained in the atmosphere. For this reason, the ambient light spectrum list 23 is set in the ambient light spectrum list 23 as described above, which is ambient light spectrum data based on sunlight that changes according to time, position, and atmospheric conditions. On the other hand, if the light source is illumination, if it is not illuminated in the daytime, the presence or absence of irradiation is determined from the time, and also changes depending on weather conditions. For this reason, the ambient light spectrum list 23, which is the ambient light spectrum data based on illumination, is also set in the ambient light spectrum list 23.

  That is, each ambient light spectrum data LS01, LS02, LS03,... Is obtained by changing the spectrum distribution of the sunlight based on the time, position, and weather when the measurement object is irradiated. In the ambient light spectrum list 23, each ambient light spectrum data LS01, LS02, LS03,... Is associated with each corresponding time, position, and weather condition. For example, the ambient light spectrum data LS01 is associated with a date DT01 as a time and a time TM01, and is associated with a longitude LG01 and a latitude LA01 as positions. The ambient light spectrum data LS01 is associated with the temperature TE01, the atmospheric pressure AP01, the humidity HM01, the cloud amount CL01, and the precipitation PR01 as weather conditions.

  Further, for example, the ambient light spectrum data LS02 is associated with the date DT02 as the time and the time TM02, and is associated with the longitude LG02 and the latitude LA02 as the positions. The ambient light spectrum data LS02 is associated with the temperature TE02, the atmospheric pressure AP02, the humidity HM02, the cloud amount CL02, and the precipitation PR02 as weather conditions.

  Further, for example, the ambient light spectrum data LS03 is associated with the date DT03 as the time and the time TM03, and is associated with the longitude LG03 and the latitude LA03 as the positions. The ambient light spectrum data LS03 is associated with the temperature TE03, the atmospheric pressure AP03, the humidity HM03, the cloud amount CL03, and the precipitation PR03 as weather conditions.

  That is, the ambient light spectrum list 23 can acquire observation light spectrum data associated with the conditions from the time, position, and weather conditions. Note that it is difficult to associate observation light spectrum data with all times, positions, and weather conditions due to restrictions such as the capacity of the storage device. Is set in the ambient light spectrum list 23 preferentially.

As shown in FIG. 1, the computing device 25 is further provided with an ambient light spectrum estimation unit 26 that estimates the spectrum of the ambient light irradiated on the measurement target. The ambient light spectrum is
Since the measurement object is irradiated, the spectrum of the observation light detected from the measurement object is affected. The ambient light spectrum estimation unit 26 estimates the spectrum of the ambient light based on the weather information acquired by the weather information acquisition device 14, the current position detected by the car navigation 15, the current time, and the like.

  The ambient light spectrum estimation unit 26 is provided with an ambient light spectrum search unit 30. The function of the ambient light spectrum search unit 30 is exhibited by executing the observation light spectrum data search program in the arithmetic unit 25. That is, the ambient light spectrum search unit 30 acquires the ambient light spectrum data associated with the weather information, the current position, and the current time from the storage device 22 based on the weather information, the current position, and the current time. . Specifically, the ambient light spectrum search unit 30 acquires the ambient light spectrum data associated with the input time, position, and weather information by searching the ambient light spectrum list 23. For example, the ambient light spectrum search unit 30 uses the date DT01 and time TM01 as time, the longitude LG01 and latitude LA01 as positions, the temperature TE01, the atmospheric pressure AP01, the humidity HM01, the cloud amount CL01, and the precipitation PR01 as weather conditions. Is entered as When the search condition is input, the ambient light spectrum search unit 30 searches the ambient light spectrum data LS01 associated with the condition from the ambient light spectrum list 23. Accordingly, the ambient light spectrum search unit 30 acquires the ambient light spectrum data LS01 based on the search condition.

  The spectrum recognizing unit 27 receives the ambient light spectrum data LS01 acquired by the ambient light spectrum estimating unit 26 and the spectrum data of the observation light, and the spectrum data of the observation light corrected based on the ambient light spectrum data LS01 is dictionary data. The measurement object is recognized by comparing with. As a result, the influence of the ambient light included in the spectrum data of the observation light is reduced, and the recognition process of the measurement object with the less influence of the spectrum of the ambient light is performed based on the spectrum data of the observation light. Recognition accuracy is improved. The spectrum recognizing unit 27 receives the ambient light spectrum data LS01 acquired by the ambient light spectrum estimating unit 26 and the spectrum data of the observation light, and compares the dictionary data to be compared with the spectrum data of the observation light with the ambient light spectrum data LS01. The measurement object recognition process may be performed by correcting based on the above.

  Next, the environment light spectrum estimation process (environment light spectrum estimation process) performed by the environment light spectrum estimation unit 26 will be described with reference to FIG. FIG. 3 is a flowchart showing the process steps of the ambient light spectrum estimation process. The ambient light spectrum estimation process is executed at predetermined time intervals.

  As shown in FIG. 3, when the ambient light spectrum estimation process is started, the ambient light spectrum estimation unit 26 acquires the current position and current time from the car navigation 15 (step S10 in FIG. 3: position detection step and Together with the time acquisition step, current weather information is acquired from the weather information acquisition device 14 (step S11 in FIG. 3: weather information acquisition step). In the ambient light spectrum estimation process, the current position, current time, or current weather information only needs to be acquired before they are used in the estimation process. It is not limited to the order or timing of steps.

When the current time, current position, and current weather information are acquired, the ambient light spectrum estimation unit 26 uses the acquired current position, current time, and current weather information as a set of search conditions as a set of search conditions. The ambient light spectrum data corresponding to this search condition is retrieved from the ambient light spectrum list 23 (step S12 in FIG. 3). In other words, the ambient light spectrum estimation unit 26 compares the search condition with a combination of the position, time, and weather information set in the ambient light spectrum list 23, so that the position and time corresponding to the search condition are compared. , And a combination of weather information are detected from the ambient light spectrum list 23. Then, when a combination of position, time, and weather information corresponding to the search condition is detected, the ambient light spectrum estimation unit 26 supports the ambient light spectrum data associated with the detected combination in accordance with the search condition. The ambient light spectrum data to be selected from the ambient light spectrum list 23 is acquired.

  When searching for ambient light spectrum data, a combination of the position, time, and weather information set in the ambient light spectrum list 23 that matches the above search conditions or is within a predetermined range from the search conditions. Selected from. For example, when the current time including the date as the search condition is the date DTc and the time TMc, the range corresponding to the current time is set as the date DTc ± 2 days and the time TMc ± 15 minutes, and the same set range Is searched from the ambient light spectrum list 23. Further, for example, when the current position as the search condition is longitude LGc and latitude LAc, the range corresponding to the current position is set as longitude LGc ± 1 minute and latitude LAc ± 1 minute, and the position within the set range Is retrieved from the ambient light spectrum list 23. Further, for example, when the current weather conditions as search conditions are the temperature TEc, the atmospheric pressure APc, the humidity HMc, the cloud amount CLc, and the precipitation PRc, the ranges corresponding to the current weather conditions are the temperature TEc ± 2 degrees and the atmospheric pressure APc ± 5. Hectopascal, humidity HMc ± 2%, cloud amount CLc ± 1, and precipitation amount PRc ± 1 mm are set. Then, the ambient light spectrum estimation unit 26 searches the ambient light spectrum list 23 for weather conditions within the set range. The range set for each item is preset in the storage device 22 or the like corresponding to each item.

  In the search for the ambient light spectrum data, the ambient light spectrum estimation unit 26 determines whether the ambient light spectrum data corresponding to the search condition exists in the ambient light spectrum list 23 (step S13 in FIG. 3). When it is determined that the ambient light spectrum list 23 has the ambient light spectrum data corresponding to the search condition (YES in step S13 in FIG. 3), the ambient light spectrum estimation unit 26 stores the ambient light spectrum data corresponding to the search condition. Obtained from the ambient light spectrum list 23 (step S14 in FIG. 3). Then, the ambient light spectrum estimation unit 26 transmits the acquired ambient light spectrum data to the spectrum recognition unit 27 as the estimated ambient light spectrum, and ends the ambient light spectrum estimation process.

  On the other hand, when it is determined that there is no ambient light spectrum data corresponding to the search condition in the ambient light spectrum list 23 (NO in step S13 in FIG. 3), the ambient light spectrum estimation unit 26 extracts the ambient light from the ambient light spectrum list 23. Spectral data cannot be acquired. In this case, the ambient light spectrum estimation unit 26 transmits, for example, predetermined standard ambient light spectrum data to the spectrum recognition unit 27 and ends the ambient light spectrum estimation process.

  Thereby, when the spectrum recognition unit 27 recognizes the measurement object from the spectrum data of the observation light, the spectrum recognition unit 27 can recognize the measurement object in consideration of the influence of the ambient light spectrum data on the spectrum data of the observation light. .

As described above, according to the spectrum measuring apparatus of the present embodiment, the effects listed below can be obtained.
(1) The weather (irradiation temperature, atmospheric pressure, humidity, cloud cover, and cloud amount) until the measurement object is irradiated based on the spectrum of the light source emitted from the light source such as the sun or illumination as the spectrum of the ambient light irradiated to the measurement object Estimated spectrum that has been affected by precipitation). As a result, the ambient light spectrum can be acquired without providing a device or the like for measuring the ambient light spectrum irradiated to the measurement object in the vehicle space of the vehicle 10 as a moving body. That is, since it is not necessary to provide the vehicle 10 with a device for measuring observation light, for example, a reference object such as a reflector having a known spectrum, the degree of freedom related to the design of the vehicle 10 can be increased. It is also effective in reducing costs. Also, the spectrum measuring apparatus 11 can suitably maintain the recognition accuracy of the measurement object by estimating the spectrum of the ambient light in this way.

  (2) Since the ambient light spectrum corresponding to each weather information can be retrieved and obtained from the ambient light spectrum list 23 based on the weather information input, it is easy to obtain the ambient light spectrum that suits various weather conditions. Can be estimated. As a result, the spectrum measuring apparatus 11 can easily recognize the measurement target with high accuracy.

  (3) The ambient light spectrum corresponding to the current position of the vehicle 10 is accurately estimated even when the ambient light spectrum varies depending on the position of the vehicle 10. As a result, the spectrum measuring apparatus 11 can recognize the measurement object with higher accuracy.

  (4) The observation light spectrum suitable for the current time is preferably estimated. For example, the spectrum of observation light can be estimated based on sunlight during daytime, and the spectrum of observation light can be estimated based on artificial lighting such as a street lamp at night.

(Second Embodiment)
A second embodiment embodying the present invention will be described with reference to FIGS.
The spectrum measurement apparatus 11 of the present embodiment is different from the first embodiment in the configuration of the storage device 22 and the ambient light spectrum estimation unit 26. Specifically, in contrast to the first embodiment, the storage device 22 is provided with a theoretical light spectrum list 24 instead of the environment light spectrum list 23, and the environment light spectrum estimation unit 26 includes the environment light spectrum list 24. A difference is that a basic light spectrum calculation unit 31 and a corrected light spectrum calculation unit 32 are provided instead of the spectrum search unit 30. Since other configurations are the same as those in the first embodiment, differences will be mainly described here. For convenience of explanation, the same components are denoted by the same reference numerals and the description thereof will be omitted. Omit.

  The theoretical light spectrum list 24 is set with standard spectrum data set according to the type of light source. As shown in FIG. 5, for example, theoretical light spectrum data TS01 is associated with sunlight as a light source type, while theoretical light spectrum data TS02 is associated with illumination A as a light source type. Further, theoretical light spectrum data TS03 is associated with illumination B as the light source type, while theoretical light spectrum data TS04 is associated with illumination C as the light source type. Furthermore, theoretical light spectrum data TS04 is associated with the illumination D as the light source type. The illuminations A to D are artificial illuminations such as mercury lamps, sodium lamps, metal halide lamps, halogen lamps, incandescent lamps, fluorescent lamps, and LED lamps.

The basic light spectrum calculation unit 31 is a spectrum in which only the influence of the current position and the current time is considered by a predetermined calculation in which the current position and the current time are added to the theoretical light spectrum data of the light source selected from the theoretical light spectrum list 24. A basic light spectrum is calculated. Then, the basic light spectrum calculation unit 31 transmits the calculated basic light spectrum to the corrected light spectrum calculation unit 32. Since the light source is usually sunlight during daytime, the basic light spectrum calculation unit 31 acquires theoretical light spectrum data TS01 using sunlight as a light source from the theoretical light spectrum list 24. The basic light spectrum calculation unit 31 calculates a relative variation coefficient as a coefficient indicating the influence of the current position and current time acquired from the car navigation 15 on the optical spectrum in the acquired theoretical light spectrum data TS01. The basic light spectrum is calculated by performing a predetermined calculation in consideration of the calculated relative variation coefficient. In other words, a basic light spectrum is calculated by adding changes that occur according to the relative direction and angle of the sun to the sunlight spectrum irradiated to the vehicle 10 to the theoretical light spectrum data TS01 of sunlight. On the other hand, when artificial light is used as the light source, the basic light spectrum calculation unit 31 acquires the type of light source from the car navigation 15 in addition to the current position and current time, so that the artificial light is used as the light source from the theoretical light spectrum list 24. The theoretical light spectrum data TS02 to be obtained can be acquired. Then, the basic light spectrum calculation unit 31 calculates a relative variation coefficient based on the current position and the current time on the obtained theoretical light spectrum data TS02 and performs a predetermined calculation in consideration of the calculated relative variation coefficient. The light spectrum is calculated.

  The corrected light spectrum calculation unit 32 receives the basic light spectrum from the basic light spectrum calculation unit 31, and estimates the input basic light spectrum based on the weather information acquired from the weather information acquisition device 14. The calculation of the state is performed to calculate the spectrum of the ambient light irradiated on the measurement object. In general, the optical spectrum is attenuated, diffused, or absorbed depending on the amount of water in the atmosphere and the water vapor density. From this, by estimating the amount of moisture and water vapor density in the atmosphere as parameters indicating the atmospheric condition, which is a parameter indicating the ease of passage of light in the atmosphere from the current weather condition, the tendency of changes that occur in the optical spectrum can be observed. Can be estimated. That is, the corrected light spectrum calculation unit 32 estimates the amount of moisture and water vapor density in the atmosphere indicating the atmospheric state, and shows the tendency of changes that the estimated amount of moisture and water vapor density in the atmosphere cause in the optical spectrum. Calculate the atmospheric variation coefficient as the coefficient shown. Then, the corrected light spectrum calculation unit 32 calculates a corrected light spectrum obtained by correcting the basic light spectrum output from the basic light spectrum calculation unit 31 based on the atmospheric variation coefficient.

As a result, the ambient light spectrum estimation unit 26 determines the corrected light spectrum calculated by the corrected light spectrum calculation unit 32 as the estimated ambient light spectrum.
Next, the ambient light spectrum estimation process performed by the ambient light spectrum estimation unit 26 will be described with reference to FIGS. 6 to 8 are flowcharts showing the processing steps of the ambient light spectrum estimation process. The ambient light spectrum estimation process is executed at predetermined time intervals. Further, step S10 and step S11 in FIG. 6 are the same as step S10 or step S11 in FIG. 3 in the first embodiment, and thus detailed description thereof will be omitted for convenience of description. In the present embodiment, a case where the ambient light is based on sunlight will be described.

  As shown in FIG. 6, when the ambient light spectrum estimation process is started, the ambient light spectrum estimation unit 26 acquires the current position and current time (step S10 in FIG. 6) and also acquires current weather information. (Step S11 in FIG. 6). When the current time, the current position, and the current weather information are acquired, the ambient light spectrum estimation unit 26 calculates a basic light spectrum (step S20 in FIG. 6).

As shown in FIG. 7, in the basic light spectrum calculation step, the ambient light spectrum estimation unit 26 calculates the position of the sun based on the current position and the current time (step S <b> 21 in FIG. 7) and is calculated as the vehicle 10. The relative positional relationship (direction and angle) with the sun position is calculated (step S21 in FIG. 7). That is, when the relative direction and relative angle of the sun with respect to the vehicle 10 are calculated, the ambient light spectrum estimation unit 26 changes changes that occur in the spectrum of sunlight irradiated to the vehicle 10 according to the relative direction and relative angle of the sun. The relative variation coefficient shown is calculated (step S23 in FIG. 7). When the relative variation coefficient is calculated, the ambient light spectrum estimator 26 corrects the solar theoretical light spectrum data TS01 based on the calculated relative variation coefficient, so that the relative solar light is obtained from the solar theoretical light spectrum data TS01. A basic light spectrum corresponding to the direction and relative angle is calculated. In this way, by calculating each basic light spectrum according to the relative direction and relative angle of the sun from the theoretical light spectrum data TS01 of the sun, between the solar light based on the theoretical light spectrum data TS01 of one sun. It becomes possible to calculate a basic light spectrum corresponding to various relative directions and relative angles.

As shown in FIG. 6, when the basic light spectrum calculation step is completed, the ambient light spectrum estimation unit 26 calculates a corrected light spectrum (step S30 in FIG. 6).
As shown in FIG. 8, in the corrected light spectrum calculation step, the ambient light spectrum estimation unit 26 estimates the atmospheric state based on the weather information (step S31 in FIG. 8), and based on the estimated atmospheric state. An atmospheric variation coefficient indicating a change occurring in the optical spectrum is calculated (step S32 in FIG. 8). When the atmospheric variation coefficient is calculated, the ambient light spectrum estimation unit 26 corrects the basic light spectrum based on the sun based on the calculated atmospheric variation coefficient, thereby responding to the atmospheric state from the basic light spectrum based on the sunlight. The corrected light spectrum is calculated. Thus, by calculating each correction light spectrum corresponding to the atmospheric state from the basic light spectrum based on sunlight, it is possible to calculate the correction light spectrum corresponding to various atmospheric conditions based on one basic light spectrum. become.

  As shown in FIG. 6, when the corrected light spectrum is calculated in step S30, the ambient light spectrum estimation unit 26 sets the calculated corrected light spectrum as the estimated ambient light spectrum, The estimation process ends.

  As described above, according to the present embodiment, the effects equivalent to or equivalent to the effects (1) to (4) of the first embodiment can be obtained, and the effects listed below can be obtained. Be able to.

  (5) Usually, the spectrum of ambient light varies greatly depending on the state of the atmosphere, especially the state of moisture contained in the atmosphere. For this reason, the ambient light spectrum is calculated in consideration of the atmospheric conditions. As a result, the spectrum of the ambient light corresponding to various weather conditions can be suitably estimated, so that the spectrum measuring apparatus 11 can recognize the measurement object with high accuracy.

(Third embodiment)
A third embodiment embodying the present invention will be described with reference to FIGS.
The spectrum measurement apparatus 11 of the present embodiment is different from the first embodiment in the configuration of the storage device 22 and the ambient light spectrum estimation unit 26. Specifically, in contrast to the first embodiment, the storage device 22 is provided with a theoretical light spectrum list 24 instead of the environment light spectrum list 23, and the environment light spectrum estimation unit 26 includes the environment light spectrum list 24. A difference is that a basic light spectrum calculation unit 31, a synthesized light spectrum calculation unit 33, and an ambient environment spectrum calculation unit 34 are provided instead of the spectrum search unit 30. Further, the car navigation 15 is different from the first embodiment in that a storage device 16 as a map information storage device is illustrated. Since other configurations are the same as those in the first embodiment, differences will be mainly described here. For convenience of explanation, the same components are denoted by the same reference numerals and the description thereof will be omitted. Omit. The theoretical light spectrum list 24 and the basic light spectrum calculation unit 31 are the same as the theoretical light spectrum list 24 and the basic light spectrum calculation unit 31 described in the second embodiment, respectively. Omitted.

  The storage device 16 of the car navigation 15 stores map information (not shown), illumination information 17 associated with the map information, and structure information 18 associated with the map information. The storage device 16 is composed of all or a part of a storage area provided in a known storage device, and map information, illumination information 17, structure information 18 and the like are stored as data in the storage area.

The lighting information 17 includes information on the installation position and the type of the lighting for each of the artificial lightings that are a plurality of artificial lighting devices existing in the road environment, and the installation position of each artificial lighting is used as map information. It can be associated. Thereby, from the current position of the vehicle 10, the presence / absence of artificial illumination at the position and the type of illumination when there is artificial illumination can be acquired.

  The structure information 18 includes information on the installation position and the influence on the spectrum of ambient light such as sunlight for each of a plurality of peripheral structures such as the structure of the road itself and buildings around the road. The installation positions of the surrounding structures can be associated with the map information. As a result, information on surrounding structures that affect the spectrum of ambient light can be acquired from the current position of the vehicle 10.

  The combined light spectrum calculation unit 33 calculates a combined light spectrum by combining the spectra of a plurality of light sources. The combined light spectrum calculation unit 33 receives a basic light spectrum that is a spectrum based on sunlight calculated by the basic light spectrum calculation unit 31, and the combined light spectrum calculation unit 33 stores the storage device 16 of the car navigation 15. The information on the artificial lighting corresponding to the current position is acquired from the lighting information 17 included in. Thereby, the synthesized light spectrum calculation unit 33 calculates the theoretical light spectrum data of the artificial illumination acquired from the theoretical light spectrum list 24 based on the input basic light spectrum and the information of the artificial illumination acquired from the illumination information 17. And synthesize. Thereby, the synthesized light spectrum calculation unit 33 calculates a synthesized light spectrum based on sunlight and artificial illumination.

  The surrounding environment spectrum calculation unit 34 adds the influence of the surrounding structure in the traveling environment to the combined light spectrum input from the combined light spectrum calculation unit 33, so that the surrounding light is the combined light spectrum affected by the surrounding structure. Calculate the environmental spectrum. The ambient environment spectrum calculation unit 34 receives the synthesized light spectrum from the synthesized light spectrum calculation unit 33, while the ambient environment spectrum calculation unit 34 determines the surrounding structure that has an influence on the ambient light spectrum at the current position. Information is acquired from the structure information 18 included in the storage device 16 of the car navigation 15. Then, the surrounding environment spectrum calculation unit 34 calculates a correction coefficient for correcting the input combined light spectrum based on the acquired information on the surrounding structure. Thereby, the surrounding environment spectrum calculation unit 34 corrects the input combined light spectrum with the calculated correction coefficient, thereby calculating the surrounding environment spectrum in which the influence of the surrounding structure is added to the combined light spectrum.

Accordingly, the ambient light spectrum estimation unit 26 obtains the ambient light spectrum calculated by the ambient environment spectrum calculation unit 34 as the estimated ambient light spectrum.
Next, the ambient light spectrum estimation process performed by the ambient light spectrum estimation unit 26 will be described with reference to FIGS. 10 to 12 are flowcharts showing the process steps of the ambient light spectrum estimation process. The ambient light spectrum estimation process is executed at predetermined time intervals. Note that step S10 in FIG. 10 is the same as step S10 in FIG. 3 in the previous first embodiment, and step S11 in FIG. 10 is the same as step S20 in FIG. 6 in the previous second embodiment. For this reason, detailed description thereof is omitted for convenience of description.

  As shown in FIG. 10, when the ambient light spectrum estimation process is started, the ambient light spectrum estimation unit 26 acquires the current position and the current time (step S10 in FIG. 10), and based on sunlight. An optical spectrum is calculated (step S20 in FIG. 10). When the basic light spectrum is calculated, the ambient light spectrum estimation unit 26 calculates a combined light spectrum (step S40 in FIG. 10).

As shown in FIG. 11, in the combined light spectrum calculation step, the ambient light spectrum estimation unit 26 acquires information on artificial lighting around the driving environment from the car navigation 15 (step S <b> 41 in FIG. 11), and around the driving environment. It is determined whether or not there is artificial lighting (step S42 in FIG. 11). If it is determined that there is artificial lighting around the driving environment (YES in step S42 in FIG. 11), the ambient light spectrum estimation unit 26 acquires the logical light spectrum data of artificial lighting from the storage device 22 (step in FIG. 11). S43). The ambient light spectrum estimation unit 26 then combines the acquired logical light spectrum data with the basic light spectrum calculated in the previous step S20 to calculate a combined light spectrum (step S44 in FIG. 11). The ambient light spectrum estimation unit 26 acquires the logical light spectrum of each of the plurality of artificial lights from the storage device 22 and combines the acquired plurality of logical light spectra with the previously calculated basic light spectrum. It may be. This completes the step of calculating the synthesized light spectrum. On the other hand, when it is determined that there is no artificial lighting around the driving environment (NO in step S42 in FIG. 11), the ambient light spectrum estimation unit 26 uses the basic light spectrum calculated previously as the combined light spectrum as it is, The synthetic light spectrum calculation step is terminated.

As shown in FIG. 10, when the combined light spectrum is calculated in step S40, the ambient light spectrum estimation unit 26 calculates the surrounding environment spectrum (step S50 in FIG. 10).
As shown in FIG. 12, in the ambient environment spectrum calculation step, the ambient light spectrum estimation unit 26 acquires information on structures around the traveling environment from the car navigation 15 (step S51 in FIG. 12), and around the traveling environment. It is determined whether or not there is a structure that affects the ambient light spectrum (step S52 in FIG. 12). When it is determined that there is a structure that affects the ambient light spectrum around the driving environment (YES in step S52 in FIG. 12), the ambient light spectrum estimation unit 26 determines that the structure is an environment from the structure information. A correction coefficient that affects the light spectrum is calculated (step S53 in FIG. 12). The correction coefficient is a coefficient for converting the spectrum of ambient light into a spectrum influenced by the structure. When the correction coefficient is calculated, the ambient light spectrum estimation unit 26 calculates the surrounding environment spectrum by correcting the combined light spectrum based on the calculated correction coefficient (step S54 in FIG. 12). The ambient light spectrum estimation unit 26 calculates a correction coefficient for each of the plurality of structures and calculates a surrounding environment spectrum by correcting the combined light spectrum based on the calculated correction coefficients. Also good. Thereby, the surrounding environment spectrum calculation step is completed.

  On the other hand, when it is determined that there is no structure that affects the ambient light spectrum around the driving environment (NO in step S52 in FIG. 12), the ambient light spectrum estimation unit 26 is calculated in the previous step S40. The synthesized light spectrum is used as the ambient environment spectrum as it is, and the ambient environment spectrum calculation step is terminated.

  As shown in FIG. 10, when the ambient environment spectrum is calculated in step S50, the ambient light spectrum estimation unit 26 sets the calculated ambient environment spectrum as the estimated ambient light spectrum, The estimation process ends.

  As described above, according to the present embodiment, the effects equivalent to or equivalent to the effects (1) to (4) of the first embodiment can be obtained, and the effects listed below can be obtained. Be able to.

  (6) Since the spectrum of the ambient light is estimated in consideration of the influence of the spectrum of the artificial light source, the spectrum of the ambient light irradiated to the measurement object can be estimated more suitably.

(7) The ambient light spectrum is estimated by taking into account the influence of the spectrum of the surrounding structure. For example, even if the light source is one sunlight, if there is a glass-walled building around the driving environment, the reflected light from the glass-walled building is also irradiated to the measurement object. A plurality of lights are input to the measurement object. In this way, even if the spectrum of ambient light irradiated to the measurement target is affected by the driving environment, the measurement target is irradiated to estimate the ambient light spectrum in consideration of the influence of the driving environment on the spectrum. It becomes possible to more accurately estimate the spectrum of ambient light.

(Fourth embodiment)
A fourth embodiment embodying the present invention will be described with reference to FIGS.
The spectrum measuring apparatus 11 according to the present embodiment uses the ambient light spectrum as the ambient light outside the vehicle 10 in contrast to the previous first embodiment in which the ambient light spectrum estimation unit 26 estimates the ambient light spectrum. The point which is estimated in the spectrum data center 40 is different. Specifically, in contrast to the first embodiment, the vehicle 10 does not have the weather information acquisition device 14, but is provided with a communication device 19. Are provided with an ambient light spectrum data center 40 for wireless communication. Further, the environment light spectrum estimation unit 26 of the vehicle 10 is different in that an environment light spectrum acquisition unit 35 is provided instead of the environment light spectrum search unit 30. Since other configurations are the same as those in the first embodiment, differences will be mainly described here. For convenience of explanation, the same components are denoted by the same reference numerals and the description thereof will be omitted. Omit.

  The communication device 19 communicates with a base station outside the vehicle 10 by wireless communication, and can communicate with the ambient light spectrum data center 40. When the current position and current time of the vehicle 10 are input from the ambient light spectrum estimation unit 26 of the arithmetic device 25, the communication device 19 transmits the input current position and current time to the ambient light spectrum data center 40. On the other hand, the communication device 19 receives spectrum data from the ambient light spectrum data center 40 and inputs the received spectrum data to the arithmetic device 25.

  The ambient light spectrum data center 40 estimates the ambient light spectrum around the vehicle 10 based on the current position and the current time received from the vehicle 10, and uses the estimated ambient light spectrum data as spectrum data. It is transmitted to the vehicle 10. The ambient light spectrum data center 40 includes a communication unit 41, a weather information acquisition unit 42, a data storage unit 43, and an ambient light spectrum estimation unit 44. The communication unit 41 communicates various data with the communication device 19 of the vehicle 10. Specifically, the communication unit 41 receives the current position and the current time of the vehicle 10 from the communication device 19, and transmits the spectrum data of the estimated ambient light spectrum to the vehicle 10.

  Based on the current position of the vehicle 10, the weather information acquisition unit 42 acquires weather information corresponding to the position, for example, information corresponding to each item of temperature, atmospheric pressure, humidity, cloud cover, and precipitation. The weather information acquisition unit 42 acquires weather information such as temperature, atmospheric pressure, humidity, cloud cover, and precipitation in the travel region of the vehicle 10 based on a generally provided weather information reporting service. Weather information at the current position of the vehicle 10 is acquired through data communication using a wired and wireless communication line, data communication using broadcasting such as a television, radio, and beacon.

The data storage unit 43 stores an ambient light spectrum list, a theoretical light spectrum list, map information, illumination information, structure information, and the like. The ambient light spectrum list is similar to the ambient light spectrum list 23 (FIG. 1) of the first embodiment, although it has a larger data capacity, while the theoretical light spectrum list is the second list. Although the data capacity is larger than that of the theoretical light spectrum list 24 (FIG. 4) of this embodiment, it is a similar list, and therefore, detailed description thereof is omitted for convenience of explanation. In addition, map information, lighting information, and structure information are respectively data for map information, lighting information 17, or structure information 18 (not shown) stored in the storage device 16 of the third embodiment. Although the capacity is large, it is the same information, and therefore the detailed description is omitted for convenience of explanation.

  The ambient light spectrum estimation unit 44 is mainly configured by a microcomputer having, for example, an arithmetic device and a storage device. The ambient light spectrum estimation unit 44 receives the current position and current time of the vehicle 10 from the communication unit 41, weather information from the weather information acquisition unit 42, and various data from the data storage unit 43. . In addition, the ambient light spectrum estimation unit 44 outputs data to be transmitted to the vehicle 10 to the communication unit 41.

  Based on the current position of the vehicle 10, the ambient light spectrum estimation unit 44 estimates the ambient light spectrum corresponding to the position. The ambient light spectrum estimation unit 44 includes an ambient light spectrum search unit, a basic light spectrum calculation unit, a corrected light spectrum calculation unit, a synthesized light spectrum calculation unit, a surrounding environment spectrum calculation unit, and the like. Since the ambient light spectrum search unit is the same as the ambient light spectrum search unit 30 (see FIG. 1) of the first embodiment, a detailed description thereof is omitted for convenience of explanation. The basic light spectrum calculation unit and the correction light spectrum calculation unit are the same as the basic light spectrum calculation unit 31 (see FIG. 4) and the correction light spectrum calculation unit 32 (see FIG. 4) of the second embodiment, respectively. Therefore, for the convenience of explanation, the detailed explanation is omitted. Furthermore, the synthesized light spectrum calculation unit and the surrounding environment spectrum calculation unit are the same as the synthesized light spectrum calculation unit 33 (see FIG. 9) and the surrounding environment spectrum calculation unit 34 (see FIG. 9) of the third embodiment, respectively. Therefore, for the convenience of explanation, the detailed explanation is omitted.

  That is, the ambient light spectrum data center 40 has a configuration capable of performing each ambient light spectrum estimation process described in the first to third embodiments. Accordingly, the ambient light spectrum data center 40 selects an appropriate ambient light spectrum estimation process based on the current position and the current time received from the vehicle 10, and the vehicle 10 based on the selected ambient light spectrum estimation process. The ambient light spectrum around the current position of is estimated. Thereby, the spectrum data of the spectrum of the ambient light accurately estimated to the vehicle 10 can be transmitted.

  The ambient light spectrum acquisition unit 35 acquires ambient light spectrum data relating to the ambient light spectrum of the vehicle 10 from the ambient light spectrum data center 40 as necessary. The ambient light spectrum acquisition unit 35 acquires standard ambient light spectrum data from the ambient light spectrum list 23 based on preset conditions when communication with the ambient light spectrum data center 40 is not possible. I have to. Thus, the ambient light spectrum data acquired by the ambient light spectrum acquisition unit 35 is obtained as the ambient light spectrum estimated by the ambient light spectrum estimation unit 26.

  Next, the ambient light spectrum estimation process performed by the ambient light spectrum estimation unit 26 will be described with reference to FIG. FIG. 14 is a flowchart showing the process steps of the ambient light spectrum estimation process. The ambient light spectrum estimation process is executed at predetermined time intervals. Since step S10 in FIG. 14 is the same as step S10 in FIG. 3 in the first embodiment, detailed description thereof is omitted for convenience of description.

As shown in FIG. 14, when the ambient light spectrum estimation process is started, the ambient light spectrum estimation unit 26 obtains the current position and current time (step S10 in FIG. 10), and the ambient light spectrum data center 40. Whether or not data transmission / reception is possible, that is, whether mutual communication is possible is determined (step S60 in FIG. 14). When it is determined that mutual communication with the ambient light spectrum data center 40 is possible (YES in step S60 in FIG. 14), the ambient light spectrum estimation unit 26 transmits the ambient light spectrum data center via the communication device 19. 4
The current position and current time of the vehicle 10 are transmitted to 0 (step S61 in FIG. 14). Thereafter, the ambient light spectrum estimation unit 26 receives spectrum data that is the spectrum data of the ambient light transmitted from the ambient light spectrum data center 40 via the communication device 19 (step S62 in FIG. 14). Then, the ambient light spectrum estimation unit 26 sets the acquired spectrum data as the estimated ambient light spectrum, and ends the ambient light spectrum estimation process.

  On the other hand, when it is determined that mutual communication with the ambient light spectrum data center 40 is impossible (NO in step S60 of FIG. 14), the ambient light spectrum estimation unit 26 determines that the ambient light is based on a predetermined condition. The ambient light spectrum data is selected from the spectrum list 23, and the selected ambient light spectrum data is used as the estimated ambient light spectrum. Then, the ambient light spectrum estimation process ends.

  As described above, according to the present embodiment, the effects equivalent to or equivalent to the effects (1) to (4) of the first embodiment can be obtained, and the effects listed below can be obtained. Be able to.

  (8) Since the ambient light spectrum estimation unit 44 is provided in the ambient light spectrum data center 40 that is outside the vehicle 10, for example, a base station or the like, the processing capability as an apparatus for estimating the ambient light spectrum is improved. Is also easy. That is, it is easy to improve calculation capacity and increase storage capacity. In addition, since the configuration on the vehicle 10 side is simplified, it is possible to reduce the number of parts, reduce the size, and the like, and it becomes easier to reduce costs.

(Fifth embodiment)
A fifth embodiment embodying the present invention will be described with reference to FIGS. 15 and 16.
In addition, this embodiment is an Example comprised by combining previous 1st-3rd embodiment. Therefore, the car navigation 15 of the present embodiment is provided with the storage device 16 similar to that of the previous third embodiment, and the storage device 22 includes the ambient light spectrum list similar to that of the previous first embodiment. 23 and a theoretical light spectrum list 24 similar to that of the second embodiment are provided. The ambient light spectrum estimation unit 26 includes an ambient light spectrum search unit 30 similar to that of the first embodiment, a basic light spectrum calculation unit 31 and a corrected light spectrum calculation similar to those of the previous second embodiment. A unit 32, and a synthesized light spectrum calculation unit 33 and an ambient environment spectrum calculation unit 34 similar to those in the third embodiment are provided. The spectrum measurement device 11 is different from the combination of the first to third embodiments in that the ambient light spectrum estimation unit 26 is further provided with a spectrum data registration unit 36. That is, since the other configurations are the same as those of the first to third embodiments, the differences will be mainly described here. For convenience of explanation, the same symbols are assigned to the same configurations. I will omit the explanation.

  For this reason, the spectrum measuring apparatus 11 of the present embodiment has a configuration capable of performing each ambient light spectrum estimation process in the first to third embodiments. Note that the ambient light spectrum estimation process to be performed is appropriately selected according to predetermined conditions.

As shown in FIG. 15, the spectrum data registration unit 36 additionally registers the ambient light spectrum estimated by the ambient light spectrum estimation unit 26 in the ambient light spectrum list 23 of the storage device 22. The spectrum data registration unit 36 includes, as necessary, environment light spectrum data that is the spectrum data of the environment light estimated from the environment light spectrum estimation unit 26, and conditions when the environment light spectrum data is estimated. , The current time, the current position, and the weather information are input as a set. When a set of current time, current position, weather information, and ambient light spectrum data is input, the spectrum data registration unit 36 receives the current time, current position,
And the combination of weather information and the ambient light spectrum data associated with this combination are additionally registered in the ambient light spectrum list 23.

  Next, the ambient light spectrum estimation process performed by the ambient light spectrum estimation unit 26 will be described with reference to FIG. FIG. 16 is a flowchart showing the process steps of the ambient light spectrum estimation process. The ambient light spectrum estimation process is executed at predetermined time intervals. Note that steps S10 to S14 in FIG. 16 are the same as steps S10 to S14 in FIG. 3 in the first embodiment, and steps S20 and S30 in FIG. 16 are the same as those in the second embodiment. 6 is the same as steps S20 and S30 in FIG. 6, and detailed description thereof is omitted for convenience of description. Further, steps S40 and S50 in FIG. 16 are the same as steps S40 and S50 in FIG. 10 in the previous third embodiment, and thus detailed description thereof will be omitted for convenience of description.

  As shown in FIG. 16, when the ambient light spectrum estimation process is started, the ambient light spectrum estimation unit 26 acquires the current position and current time (step S10 in FIG. 16) and also acquires the current weather information. (Step S11 in FIG. 16). Then, using the acquired current position, current time, and current weather information as a set of search conditions, the ambient light spectrum data corresponding to this search condition is retrieved from the ambient light spectrum list 23 (step S12 in FIG. 16). It is determined whether or not the ambient light spectrum data corresponding to the search condition exists in the ambient light spectrum list 23 (step S13 in FIG. 16). When it is determined that the ambient light spectrum list 23 has the ambient light spectrum data corresponding to the search condition (YES in step S13 in FIG. 16), the ambient light spectrum estimation unit 26 stores the ambient light spectrum data corresponding to the search condition. Obtained from the ambient light spectrum list 23 (step S14 in FIG. 16). When the ambient light spectrum data is acquired, the ambient light spectrum estimation unit 26 calculates the combined light spectrum (step S40 in FIG. 16) and the surrounding environment spectrum (step S50 in FIG. 16). Then, the ambient light spectrum estimation unit 26 sets the calculated ambient environment spectrum as the estimated ambient light spectrum and ends the ambient light spectrum estimation process.

  On the other hand, when it is determined that there is no ambient light spectrum data corresponding to the search condition in the ambient light spectrum list 23 (NO in step S13 in FIG. 16), the ambient light spectrum estimation unit 26 calculates a basic light spectrum (FIG. 16 step S20), the corrected light spectrum is calculated (step S30 in FIG. 16). When the corrected light spectrum is calculated, the ambient light spectrum estimation unit 26 sets the calculated corrected light spectrum as the estimated ambient light spectrum and uses the estimated ambient light spectrum as the environment under a predetermined condition. Registration in the optical spectrum list 23 (step S70 in FIG. 16). When the registration of the ambient light spectrum to the ambient light spectrum list 23 is completed, the ambient light spectrum estimation unit 26 calculates the combined light spectrum based on the calculated ambient light spectrum data in the same manner as described above (FIG. 16). In step S40), the ambient environment spectrum is calculated (step S50 in FIG. 16). Then, the ambient light spectrum estimation unit 26 sets the calculated ambient environment spectrum as the estimated ambient light spectrum and ends the ambient light spectrum estimation process. The process of registering the estimated ambient light spectrum in the ambient light spectrum list 23 may be performed after the surrounding environment spectrum is calculated.

  As described above, according to this embodiment, effects equivalent to or equivalent to the effects (1) to (7) of the first to third embodiments can be obtained, and are listed below. An effect comes to be acquired.

(9) Even when the ambient light spectrum is not registered in the ambient light spectrum list 23, the ambient light spectrum is accurately estimated by calculating the ambient light spectrum. At this time, the registered contents of the ambient light spectrum list 23 can be enhanced by registering the calculated ambient light spectrum in the ambient light spectrum list 23.

(Sixth embodiment)
A sixth embodiment embodying the present invention will be described with reference to FIGS. 17 and 18.
In addition, this embodiment is an Example comprised by combining previous 2nd-4th embodiment. For this reason, the spectrum measuring apparatus 11 of the present embodiment is provided with a communication device 19 similar to the previous fourth embodiment and an ambient light spectrum data center 40 capable of mutual communication via the communication device 19. ing. The car navigation 15 is provided with a storage device 16 similar to that of the previous third embodiment, and the storage device 22 is provided with a theoretical light spectrum list 24 similar to that of the previous second embodiment. Yes. Further, the ambient light spectrum estimation unit 26 includes a basic light spectrum calculation unit 31 and a corrected light spectrum calculation unit 32 similar to those in the second embodiment, and a combined light spectrum calculation similar to that in the third embodiment. A unit 33 and a surrounding environment spectrum calculation unit 34 are provided. That is, since the configuration of this embodiment is the same as the combination of the previous second to fourth embodiments, only the differences due to the combination will be described here. The same reference numerals are given and the description thereof is omitted.

  For this reason, the spectrum measuring apparatus 11 of the present embodiment has a configuration capable of performing each ambient light spectrum estimation process in the second to fourth embodiments. Note that the ambient light spectrum estimation process to be performed is appropriately selected according to predetermined conditions.

  Therefore, the ambient light spectrum estimation process performed by the ambient light spectrum estimation unit 26 will be described with reference to FIG. FIG. 18 is a flowchart showing the process steps of the ambient light spectrum estimation process. The ambient light spectrum estimation process is executed at predetermined time intervals. Each step S10, S60 to S62 in FIG. 18 is the same as each step S10, S60 to S62 in FIG. 14 in the previous fourth embodiment, and each step S11, S20, S30 in FIG. Since this is the same as steps S11, S20, and S30 of FIG. 6 in the second embodiment, detailed description thereof is omitted for convenience of explanation. Furthermore, since steps S40 and S50 in FIG. 18 are the same as steps S40 and S50 in FIG. 10 in the third embodiment, detailed description thereof will be omitted for convenience of description.

  As shown in FIG. 18, when the ambient light spectrum estimation process is started, the ambient light spectrum estimation unit 26 acquires the current position and the current time (step S10 in FIG. 18), and the ambient light spectrum data center 40. It is determined whether data can be transmitted / received to / from, that is, whether mutual communication is possible (step S60 in FIG. 18). When it is determined that mutual communication with the ambient light spectrum data center 40 is possible (YES in step S60 of FIG. 18), the ambient light spectrum estimation unit 26 passes the communication device 19 to the ambient light spectrum data center. The current position and current time of the vehicle 10 are transmitted to 40 (step S61 in FIG. 18). Thereafter, the ambient light spectrum estimation unit 26 receives the spectrum data, which is the spectrum data of the ambient light transmitted from the ambient light spectrum data center 40, via the communication device 19 (step S62 in FIG. 18). Then, the ambient light spectrum estimation unit 26 sets the acquired spectrum data as the estimated ambient light spectrum, and ends the ambient light spectrum estimation process. Thus, when mutual communication with the ambient light spectrum data center 40 is possible, the ambient light spectrum can be estimated by calculation in the ambient light spectrum data center 40.

On the other hand, when it is determined that mutual communication with the ambient light spectrum data center 40 is impossible (NO in step S60 in FIG. 18), the ambient light spectrum estimation unit 26 acquires the current weather information. (Step S11 in FIG. 18), the basic light spectrum and the corrected light spectrum are calculated in order (step S20 and step S30 in FIG. 18). When the ambient light spectrum data is acquired, the ambient light spectrum estimation unit 26 calculates the combined light spectrum (step S40 in FIG. 18) and the surrounding environment spectrum (step S50 in FIG. 18). Then, the ambient light spectrum estimation unit 26 sets the calculated ambient environment spectrum as the estimated ambient light spectrum and ends the ambient light spectrum estimation process. As a result, even if mutual communication with the ambient light spectrum data center 40 is impossible, the ambient light spectrum can be appropriately estimated.

  As described above, according to this embodiment, effects equivalent to or equivalent to the effects (1), (3) to (8) of the first to fourth embodiments can be obtained. The effects listed are obtained.

  (10) Since the ambient light spectrum estimation unit 26 is also provided on the vehicle 10 side, the ambient light spectrum estimation unit 44 of the external ambient light spectrum data center 40 is used only when mutual communication is possible. It is good also as a structure. Thereby, the spectrum of the ambient light can be accurately estimated regardless of whether or not the mutual communication with the ambient light spectrum data center 40 is possible.

In addition, each said embodiment can also be implemented with the following aspects.
In the second embodiment, the case where the spectrum of the ambient light is estimated based on the atmospheric state is illustrated. However, the present invention is not limited to this, and the spectrum data of the observation light may be corrected based on the atmospheric state.

  For example, as shown in FIG. 19, in the correction process of the spectrum data of the observation light to be measured, the atmospheric state is estimated (spectrum S70 in FIG. 19), and the variation coefficient by which the estimated atmospheric state changes the optical spectrum is calculated. Calculate (spectrum S71 in FIG. 19). Then, the spectrum data of the observation light is corrected based on the calculated variation coefficient. As a result, the influence of the atmospheric state on the spectral data of the observation light is corrected, and the measurement object is more accurately recognized based on the spectral data of the observation light.

  In the first embodiment, the ambient light spectrum data search condition ranges are: ± 2 days for date, ± 15 minutes for time, ± 1 minute for longitude, ± 1 minute for latitude, ± 2 degrees for temperature, The case where the atmospheric pressure is set to ± 5 hectopascal, the humidity is set to ± 2%, the cloudiness is set to ± 1, and the precipitation is set to ± 1 mm is illustrated. However, the search condition range of the ambient light spectrum data is not limited to this, the date may be wider or narrower than ± 2 days, the time may be wider or narrower than ± 15 minutes, and the longitude may be ± 1 minutes. It may be wider or narrower, and the latitude may be wider or narrower than ± 1 minute. In addition, the range of the search condition may be such that the temperature is wider or narrower than ± 2 degrees, the atmospheric pressure may be wider or narrower than ± 5 hectopascals, and the humidity may be wider or narrower than ± 2%. The cloud cover may be wider or narrower than ± 1, and the precipitation may be wider or narrower than ± 1 mm. As a result, the ambient light spectrum estimation unit 26 can retrieve the ambient light spectrum data within a suitable range from the search condition from the ambient light spectrum list 23.

  In the second embodiment, the case where the basic light spectrum based on sunlight is calculated is illustrated. However, the present invention is not limited to this, and the basic light spectrum may be calculated based on artificial illumination. In other words, by calculating the basic light spectrum based on lighting / extinguishing of artificial lighting, irradiation angle of artificial lighting, etc., it is possible to accurately estimate the spectrum of ambient light even under artificial lighting. Become.

  In each of the above embodiments, the case where the temperature, atmospheric pressure, humidity, cloud cover, and precipitation are used as the weather conditions is illustrated. However, the present invention is not limited to this, and the weather conditions may be any one of temperature, atmospheric pressure, humidity, cloud cover, and precipitation, or any combination of at least two or more. Further, information other than these may be added to the weather conditions. As a result, the degree of freedom of design for the estimation process can be increased for estimating the ambient light spectrum.

  In each of the above embodiments, the case where the human machine interface 12 and the car navigation 15 are provided has been illustrated. However, the present invention is not limited thereto, and the human machine interface and the car navigation may be integrated. According to this, the spectrum measuring apparatus 11 can be reduced in size and simplified.

  In each of the above embodiments, the case where the current position and the current time are acquired from the car navigation 15 is illustrated. However, the present position is not limited to this, and the current position and the current time may be acquired by different devices as long as their accurate values can be acquired. Thereby, the design freedom of the spectrum measuring apparatus 11 is increased.

  In each of the above embodiments, the case where the weather information acquisition device 14 (or the weather information acquisition unit 42) acquires weather information by data communication or the like is illustrated, but the present invention is not limited thereto, and the weather information acquisition device You may make it observe all or one part directly. For example, the temperature may be measured by a thermometer, the atmospheric pressure may be measured by a barometer, the humidity may be measured by a hygrometer, the cloud cover may be detected by image recognition, and the precipitation may be measured by a rain gauge. . As a result, the weather conditions around the vehicle 10 can be accurately acquired, and the spectrum of the ambient light can be accurately estimated.

  -In the said 5th Embodiment, the case where the 1st-3rd embodiment was combined was illustrated, and in the said 6th Embodiment, the case where the 2nd-4th embodiment was combined was illustrated. However, the present invention is not limited to this, and the first to fourth embodiments can be implemented by arbitrarily combining at least two of the first to fourth embodiments. As a result, the spectrum measuring apparatus 11 can be more freely configured and designed in performing the ambient light spectrum estimating process.

  DESCRIPTION OF SYMBOLS 10 ... Vehicle, 11 ... Spectrum measuring device, 12 ... Human machine interface, 13 ... Vehicle control device, 14 ... Weather information acquisition device, 15 ... Car navigation, 16 ... Memory | storage device, 17 ... Illumination information, 18 ... Structure information, DESCRIPTION OF SYMBOLS 19 ... Communication apparatus, 20 ... Spectrum sensor, 21 ... Spectral data processing apparatus, 22 ... Memory | storage device, 23 ... Ambient light spectrum list, 24 ... Theoretical light spectrum list, 25 ... Arithmetic unit, 26 ... Ambient light spectrum estimation part, 27 DESCRIPTION OF SYMBOLS ... Spectrum recognition part, 30 ... Ambient light spectrum search part, 31 ... Basic light spectrum calculation part, 32 ... Correction light spectrum calculation part, 33 ... Synthetic light spectrum calculation part, 34 ... Ambient environment spectrum calculation part, 35 ... Ambient light spectrum Acquisition unit, 36... Spectrum data registration unit, 40... Ambient light spectrum data center, 41 Communication unit, 42 ... weather information acquiring unit, 43 ... data storage unit, 44 ... ambient light spectrum estimation unit.

Claims (16)

A spectrum measuring apparatus for recognizing a measurement object based on spectrum data of observation light detected by a spectrum sensor mounted on a moving body,
A weather information acquisition unit for acquiring weather information around the moving body;
An ambient light spectrum estimator that estimates the spectrum of the ambient light irradiated to the measurement object based on the weather information;
The spectrum measuring apparatus characterized by adding the influence of the spectrum of the ambient light estimated by the ambient light spectrum estimation unit to the recognition of the measurement object based on the spectrum data of the observation light. The ambient light spectrum estimation unit estimates an atmospheric state that is a parameter indicating the ease of passage of light from the weather information acquired by the weather information acquisition unit, and estimates the spectrum of the ambient light irradiated to the measurement target The spectrum measurement apparatus according to claim 1, wherein the spectrum measurement apparatus estimates the calculation by taking into account information related to the atmospheric state. A spectrum storage unit in which the spectrum of the ambient light is stored in association with each of the weather information;
The ambient light spectrum estimation unit selects a spectrum obtained by searching the spectrum storage unit based on the weather information acquired by the weather information acquisition unit as the spectrum of the ambient light to be estimated. Spectrum measurement device. It further comprises a position detection unit that acquires a current position of the moving body,
The ambient light spectrum estimation unit estimates a spectrum of ambient light applied to a measurement target by further taking into account the current position of the moving object acquired by the position detection unit. The spectrum measuring apparatus described in 1. A time acquisition unit for acquiring the current time;
The spectrum measurement device according to claim 4, wherein the ambient light spectrum estimation unit estimates the spectrum of the observation light irradiated to the measurement object, further taking into account the current time acquired by the time acquisition unit. A map information storage device having information on the spectrum of the artificial light source respectively associated with the map information;
The ambient light spectrum estimation unit acquires information on the spectrum of the corresponding artificial light source from the map information storage device based on the current position acquired by the position detection unit, and determines the influence of the acquired spectrum of the artificial light source. The spectrum measurement apparatus according to claim 4, wherein the spectrum of ambient light irradiated on the measurement object is estimated in consideration. The map information storage device further includes information on the surrounding environment that affects the spectrum of ambient light for each position,
The ambient light spectrum estimation unit acquires information on the corresponding surrounding environment from the map information storage device based on the current position acquired by the position detection unit, and takes into account the acquired information on the surrounding environment. The spectrum measurement apparatus according to claim 6, wherein the spectrum of ambient light irradiated on the measurement target is estimated. The ambient light spectrum estimation unit is provided at a position away from the mobile body, and the mobile body and the ambient light spectrum estimation unit are provided with a communication unit that performs wireless communication with each other,
The ambient light spectrum estimation unit receives the information indicating the current position transmitted from the mobile body via the communication unit, estimates the ambient light spectrum at the received position, and the estimated environment The spectrum measurement apparatus according to any one of claims 4 to 7, wherein a spectrum of light is transmitted to the moving body via the communication unit. A spectrum measurement method for recognizing a measurement object based on spectrum data of observation light detected by a spectrum sensor mounted on a moving body,
A weather information acquisition step of acquiring weather information around the moving body;
An ambient light spectrum estimating step for estimating a spectrum of ambient light irradiated to the measurement object based on the acquired weather information;
The spectrum measurement method, wherein the influence of the estimated spectrum of the ambient light is added to the recognition of the measurement object performed based on the spectrum data of the observation light. The ambient light spectrum estimation step estimates the atmospheric state, which is a parameter indicating the ease of passage of light, from the acquired weather information, and information on the estimated atmospheric state that is the spectrum of the ambient light irradiated on the measurement target The spectrum measurement method according to claim 9, wherein the spectrum measurement method is estimated by a calculation that takes into account. The mobile body is provided with a spectrum storage unit in which information on the spectrum of the ambient light is stored in association with the weather information,
The spectrum measurement method according to claim 9, wherein the ambient light spectrum estimation step selects a spectrum obtained by searching the spectrum storage unit based on the acquired weather information as the spectrum of the ambient light to be estimated. Further comprising a position detection step of acquiring a current position of the mobile body;
The spectrum according to any one of claims 9 to 11, wherein the ambient light spectrum estimation step estimates the ambient light spectrum irradiated to the measurement target by further taking into account the current position acquired by the position detection step. Measuring method. It further includes a time acquisition process for acquiring the current time,
The spectrum measurement method according to claim 12, wherein the ambient light spectrum estimating step estimates the spectrum of the ambient light irradiated to the measurement object, further taking into account the current time acquired by the time acquisition step. The mobile body is further provided with a map information storage device having information on the spectrum of the artificial light source respectively associated with the map information,
The ambient light spectrum estimation step acquires information on the spectrum of the corresponding artificial light source from the map information storage device based on the acquired current position, and considers the influence of the acquired spectrum of the artificial light source. The spectrum measurement method according to claim 12 or 13, wherein a spectrum of ambient light irradiated on a measurement target is estimated. The map information storage device further includes information on the surrounding environment that affects the spectrum of ambient light for each position,
The ambient light spectrum estimation step acquires information on a corresponding surrounding environment from the map information storage device based on the acquired current position, and irradiates the measurement target with information on the acquired surrounding environment. The spectrum measuring method according to claim 14, wherein the spectrum of the ambient light being estimated is estimated. The ambient light spectrum estimation step is processed by a processing device provided at a position away from the mobile body, and the mobile body and the processing device are provided with a communication unit that performs wireless communication with each other.
The ambient light spectrum estimation step receives information indicating the current position transmitted from the mobile body via the communication unit, estimates the ambient light spectrum at the received position, and estimates the estimated ambient light. The spectrum measurement method according to any one of claims 12 to 15, wherein the spectrum is transmitted to the moving body via the communication unit.

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