JP2016191602A - Route search system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a route search device capable of searching a suitable guide route corresponding to a driver's state.SOLUTION: On the basis of a biological index relating to biological information of a driver of a vehicle, and a determination reference value for the biological index, it is determined whether a driver's state is a normal state, an excited state, or an excessively calm state, and a guide route to a destination is searched on the basis of the driver's state. A suitable guide route can be searched by searching a guide route corresponding to each of the excited state and excessively calm state other than a guide route corresponding to the normal state.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a route search device that acquires biological information of a driver of a moving object.

  Conventionally, a navigation device (route search device) that acquires biological information of a vehicle driver has been proposed (see, for example, Patent Document 1). In the conventional navigation device described in Patent Document 1, the physical condition of the driver is determined based on biological information, and a route with a small driving load is guided according to the physical condition of the driver.

JP 2012-91570 A

  However, the navigation device of Patent Document 1 can cope with a case where the driver's physical condition is bad, but does not correspond to other states. That is, when the driver is not in a normal state, there are various possibilities other than poor physical condition, and an appropriate route varies depending on the state. Therefore, even if the route is uniformly guided only for poor physical condition like a conventional navigation device, there is a possibility that the route is not appropriate.

  Therefore, an object of the present invention is to provide a route search device that can search for an appropriate guide route according to the state of the driver.

  In order to solve the above-described problem and achieve the object, the route search apparatus according to the present invention includes an index acquisition unit that acquires a biological index related to biological information of a driver of a moving body, and the biological index. A reference acquisition unit that acquires a determination reference value, a state determination unit that determines a driver state that is the state of the driver based on the biometric index and the determination reference value, and a purpose based on the driver state And a route search unit that searches for a guide route to the ground.

  The route search method of the present invention according to claim 6 is an index acquisition step of acquiring a biological index related to biological information of a driver of a moving body, a reference acquisition step of acquiring a determination reference value for the biological index, And a state determination step of determining a driver state that is the state of the driver based on a biometric index and the determination reference value.

It is a block diagram which shows the outline of the navigation apparatus which concerns on the Example of this invention. It is a flowchart which shows an example of the procedure of the biometric information storage process which the said navigation apparatus performs. It is a flowchart which shows an example of the procedure of the route search process which the said navigation apparatus performs. It is a flowchart which shows an example of the procedure of the re-search process which the said navigation apparatus performs. It is a flowchart which shows an example of the procedure of the preference memory | storage process which the said navigation apparatus performs.

  Embodiments of the present invention will be described below. A route search device according to an embodiment of the present invention includes an index acquisition unit that acquires a biological index related to biological information of a driver of a mobile object, a reference acquisition unit that acquires a determination reference value for the biological index, a biological index, and a determination A state determination unit that determines a driver state that is a driver's state based on a reference value, and a route search unit that searches for a guide route to a destination based on the driver state.

  According to such a route search device of the present embodiment, it is possible to search for an appropriate guide route according to the driver state by determining the driver state and searching for the guide route based on the driver state. it can. At this time, it is preferable that the state determination unit determines whether the driver state is one of three or more states including a normal state.

  The biometric index includes an excitement sedation indicating the degree of excitement of the driver, and the state determination unit determines that the driver state is an excitement when the excitement sedation is higher than the normal excitement sedation by a criterion value or more. However, it is preferable to determine that the driver state is an excessively sedated state when the driver's state is lower than the determination reference value than the normal excitement sedation level. Thereby, it is possible to search for a guide route corresponding to the oversedated state while searching for a guide route corresponding to the excited state. The excitement sedation degree may include the excitement degree and the sedation degree as independent parameters, and the excitement state is determined only by the excitement degree regardless of the sedation degree. The sedation state may be determined. In addition, when the driver is excited, feels mental stress, or is nervous, it is assumed that the excitement and sedation is high (excitement level is high), and the driver feels drowsy, driving If the person feels bored or tired, the excitement sedation is low (high sedation).

  The route search unit searches for a guidance route that decreases the degree of excitement sedation when the driver state is in an excited state, and searches for a guidance route that increases the degree of excitement sedation when the driver state is in an oversedated state. Is preferred. Thereby, the driver state can be brought close to the normal state. For example, when the driver's state is an arousal state, it is only necessary to reduce the stress on the driver and reduce the excitement and sedation by using a route including many straight lines or a route with less traffic as a guide route. . Further, when the driver state is an excessively sedated state, a route with many curves and unevenness may be used as a guide route to stimulate the driver and increase the degree of excitement and sedation. Thereby, it is possible to search for a more appropriate guide route according to the driver state.

  It is preferable that a history information acquisition unit that acquires history information that associates past driver states with road information is further provided, and the route search unit searches for a guidance route based on the history information. Thereby, it is possible to search for a more appropriate guide route in consideration of the influence of the road on the driver state. In other words, it is possible to search for a guidance route in consideration of the driver's preference and weakness. For example, a straight road is considered to be difficult for many drivers to feel stress when traveling, but a driver driving a mobile body equipped with a route search device feels stress on a straight road In the next route search, the guide route is searched on the assumption that the straight road gives stress.

  It is preferable that the state determination unit determines the driver state when the moving body is traveling according to the guidance route, and the route search unit re-searches the guidance route according to the driver state during traveling. Thus, for example, when the driver state changes by traveling according to the guide route, the guide route corresponding to the changed driver state can be searched again, and a more appropriate guide route can be searched. .

  In addition, the route search method according to the embodiment of the present invention includes an index acquisition step of acquiring a biological index related to biological information of a driver of a moving body, a reference acquisition step of acquiring a determination reference value for the biological index, and a biological index And a state determination step of determining a driver state that is the state of the driver based on the determination reference value, and a route search step of searching for a guide route to the destination based on the driver state. According to the route search method of this embodiment, an appropriate guide route according to the driver's state can be searched for as in the above route search device.

  Moreover, it is good also as a route search program which performs the route search method mentioned above by computer. By doing so, it is possible to search for an appropriate guidance route using a computer.

  The route search program described above may be stored in a computer-readable recording medium. In this way, the program can be distributed as a single unit in addition to being incorporated in the device, and version upgrades can be easily performed.

  Examples of the present invention will be specifically described below. FIG. 1 is a block diagram illustrating an outline of a navigation device 10 according to an embodiment of the present invention, FIG. 2 is a flowchart illustrating an example of a biometric information storage process performed by the navigation device 10, and FIG. FIG. 4 is a flowchart showing an example of a procedure of a route search process executed by the navigation apparatus 10, FIG. 4 is a flowchart showing an example of a procedure of a re-search process executed by the navigation apparatus, and FIG. It is a flowchart which shows an example of the procedure of a preference memory | storage process to perform.

  The navigation device 10 of this embodiment is mounted on a vehicle as a moving body and provides route guidance. As shown in FIG. 1, the control unit 2, the GPS receiving unit 3, the storage unit 4, and the operation Unit 5, display unit 6, voice output unit 7, and communication unit 8, and a part of navigation device 10 constitutes route search device 1.

  The control unit 2 is configured by a CPU (Central Processing Unit) including a memory such as a RAM (Random Access Memory) and a ROM (Read Only Memory), and controls the navigation device 1 as a whole. Further, as will be described later, the control unit 2 acquires a determination reference value for the biological index from the storage unit 4 and functions as a reference acquisition unit, determines a driver state, functions as a state determination unit, and It searches for a guide route to the destination and functions as a route search unit, acquires history information from the storage unit 4 and functions as a history information acquisition unit.

  The GPS receiving unit 3 receives radio waves transmitted from a plurality of GPS (Global Positioning System) satellites as known, and obtains current position information (current position information) and outputs it to the control unit 2. In the present embodiment, an example in which the GPS receiving unit 3 is provided integrally with the navigation device 1 is shown, but the GPS receiving unit 3 may be configured as a separate body and detachable from the navigation device 1. .

  The storage unit 4 is composed of, for example, a hard disk or a non-volatile memory, and includes map data to be displayed on the route search and display unit 6, programs and data for the control unit 2 to control the navigation device 1, and the like, which will be described later. Component consumption information is stored, and reading / writing is performed under the control of the control unit 2. The storage unit 4 stores not only map data but also road information indicating details of the road. The road information includes, for example, road gradient and curvature, presence / absence of uneven portions for preventing snoozing, road width, speed limit, presence / absence of roadside belts, and the like. Moreover, the memory | storage part 4 is comprised so that the log | history information which linked | related the past driver state and road information may be memorize | stored so that it may mention later.

  The operation unit 5 includes input means such as buttons and a touch panel, and voice input means such as a microphone. The operation unit 5 performs various input operations of the navigation device 10 and outputs a control signal indicating the input operation to the control unit 2.

  The display unit 6 includes a liquid crystal display and a driver circuit that controls the liquid crystal display. The display unit 6 displays, on the liquid crystal display, map data, various icons, operation buttons, a route to the destination, a traveling direction, and the like under the control of the control unit 2.

  The audio output unit 7 includes a speaker and an amplifier that drives the speaker, and outputs guidance voices, confirmation sounds, and the like during operation under the control of the control unit 2.

  The communication unit 8 functions as an index acquisition unit by communicating with a biological sensor 20 provided outside the navigation device 10 and acquiring a biological index related to biological information. The communication unit 8 may communicate with the biosensor 20 wirelessly or may be connected to the biosensor 20 by wire.

  The biometric sensor 20 is, for example, a wearable terminal, and measures biometric information such as a heart rate, blood pressure, sweating amount, and mental stress of a wearer (that is, a driver), and the measurement data of the biometric information is controlled by a control unit. 2 to send. The biosensor 20 may measure at least one of these pieces of biometric information. Furthermore, when the biosensor 20 is worn on the wearer's eye, the frequency of blinking and the movement of the eyeball may be measured. Moreover, the biosensor 20 may be mounted on the vehicle, and may be provided at a portion where the driver contacts, such as a steering wheel or a seat.

  Based on the measurement data of the biological information transmitted from the biological sensor 20, the control unit 2 calculates an excitement sedation level ES indicating the degree of driver's excitement as a biological index. That is, when the heart rate and blood pressure are high or when the amount of sweat is large, when mental stress is large, when the excitement sedation level ES is high, when the heart rate or blood pressure is low, or when the amount of sweat is low, the mental stress is When the frequency is small, when the frequency of blinking is high, the excitement sedation level ES is low. Therefore, when the driver is excited, feels stress, or is nervous, the excitement sedation level ES becomes high, the driver feels sleepy, feels dull in driving, When fatigued, the excitement sedation level ES is lowered. When the calculated excitement sedation level ES is higher than the normal excitement sedation level ES0, which is the excitement sedation level, by the determination reference value α, the control unit 2 determines that the driver state, which is the driver's state, is the excited state. When the determination reference value α is lower than the normal excitement sedation level ES0 by more than the determination reference value α, the driver state is determined to be an excessively sedated state, which is lower than the value obtained by adding the determination reference value α to the normal excitement sedation level ES0 and the determination reference value When it becomes higher than the value obtained by subtracting α, it is determined that the driver state is the normal state. The normal excitement sedation level ES0 and the determination reference value α are stored in the storage unit 4 as described later.

  In the navigation device 10 as described above, the control unit 2, the storage unit 4, and the communication unit 8 constitute the route search device 1.

  Here, the procedure in which the control unit 2 executes the biological information storage process shown in FIG. 2 will be described. When the time required for the vehicle to start running and the driver's biometric information to stabilize (for example, 10 minutes) has elapsed, the control unit 2 executes biometric information storage processing. In the biological information storage process, the control unit 2 first acquires measurement data of biological information from the biological sensor 20 via the communication unit 8 (S10), and determines whether all types of measurement data have been acquired (S11). ). When there is unacquired measurement data (N in S11), the control unit 2 returns to S10 again.

  On the other hand, when all types of measurement data are acquired (Y in S11), the control unit 2 calculates the excitement sedation degree ES based on the measurement data of the biological information (S12). Next, the control unit 2 acquires the normal excitement sedation level ES0 from the storage unit 4 (S13), and based on the excitement sedation level ES and the normal excitement sedation level ES0 calculated in S12, a new normal excitement sedation level ES0n. Is calculated (S14). For example, the average value of the excitement sedation level ES and the normal excitement sedation level ES0 may be the new normal excitement sedation level ES0n, and the average value of the excitement sedation level ES every time may be the new normal excitement sedation level ES0n. If the normal excitement sedation level ES0 is not stored in the storage unit 4, such as when the navigation device 10 is used for the first time or when the data in the storage unit 4 is reset, the excitation sedation level ES calculated in S12 is used. May be set to a new normal excitement sedation level ES0n. Next, the control unit 2 stores the new normal excitement sedation level ES0n calculated in S14 as the normal excitement sedation level ES0 in the storage unit 4 (S15), and ends the biological information storage process.

  Through such biological information storage processing, the normal excitement sedation level ES0 stored in the storage unit 4 is updated. The biometric information storage process may be executed every time the ignition of the vehicle is turned on, or may be periodically executed when the vehicle is traveling.

  Next, a procedure for the control unit 2 to execute the route search process shown in FIG. 3 will be described. When an operation for inputting a destination to the operation unit 5 is performed by the passenger, the control unit 2 starts a route search process for searching for a guide route to the destination. In the route search process, the control unit 2 first acquires measurement data of biological information from the biological sensor 20 via the communication unit 8 (S20), and determines whether all types of measurement data have been acquired (S21). . When there is unacquired measurement data (N in S21), the control unit 2 returns to S20 again. On the other hand, when all types of measurement data are acquired (Y in S21), the control unit 2 calculates the excitement sedation level ES based on the measurement data of the biological information (S22), and the control unit 2 receives the data from the storage unit 4. The normal excitement sedation level ES0 is acquired (S23, reference acquisition step). S20 to S22 correspond to the index acquisition process.

  Next, the control unit 2 determines whether or not the value obtained by subtracting the normal excitement sedation level ES0 from the calculated excitement sedation level ES is equal to or greater than the reference value α (S24). When the value obtained by subtracting the normal excitement sedation level ES0 from the excitement sedation level ES is equal to or greater than the reference value α (Y in S24), the control unit 2 determines that the driver state is the excited state (S25), and the excitement sedation level A guide route that reduces the ES is searched (S26). On the other hand, when the value obtained by subtracting the normal excitement sedation level ES0 from the excitement sedation level ES is less than the reference value α (N in S24), the control unit 2 subtracts the normal excitement sedation level ES0 from the calculated excitement sedation level ES. It is determined whether or not the value is equal to or less than a reference value −α (S27). When the value obtained by subtracting the normal excitement sedation level ES0 from the calculated excitement sedation level ES is equal to or less than the reference value −α (Y in S27), the control unit 2 determines that the driver state is an oversedation state (S28). ), Searching for a guidance route that increases the excitement sedation degree ES (S29). On the other hand, when the value obtained by subtracting the normal excitement sedation ES0 from the calculated excitement sedation ES is larger than the reference value −α (N in S27), the control unit 2 determines that the driver state is the normal state ( S30), a normal guidance route is searched (S31). S24 and S27 correspond to the state determination step, and S26, S29, and S31 correspond to the route search step. After searching for a guide route in S26, S29, or S31, the control unit 2 ends the route search process.

  Note that the guidance route that reduces the excitement and sedation level ES is, for example, a route that includes many straight lines, a route with a small amount of traffic, a route with a wide road width, a route with a small number of right / left turns, and a small number of traffic lights passing through. Any route such as a route that can reduce stress on the driver or a route that is easy to travel can be used. In addition, the guidance route that increases the excitement and sedation level ES can stimulate the driver, for example, a route with many curves, a route with unevenness for preventing snoozing, a route with a lot of traffic, and the like. Any route is acceptable. Further, by guiding the vehicle to a roadside belt, a parking area, a resting facility, etc., and prompting a break, the vehicle may be lowered when the excitement sedation level ES is high, and may be raised when it is low. Also, on roads with few traffic lights such as expressways and toll roads, an excited driver may increase the traveling speed too much, or an oversedated driver may feel sleepy Therefore, even if the excitement sedation level ES is high or low, the route may be searched avoiding the expressway.

  Here, the procedure in which the control unit 2 executes the re-search process shown in FIG. 4 will be described. When a predetermined time elapses after the route search process ends, the control unit 2 starts the re-search process. In the re-search process, the control unit 2 first acquires measurement data of biological information from the biological sensor 20 via the communication unit 8 (S40), and determines whether all types of measurement data have been acquired (S41). . When there is unacquired measurement data (N in S41), the control unit 2 returns to S40 again. On the other hand, when all types of measurement data are acquired (Y in S41), the control unit 2 calculates the excitement sedation level ES based on the measurement data of the biological information (S42), and the control unit 2 receives the data from the storage unit 4. The normal excitement sedation level ES0 is acquired (S43).

  Next, the control unit 2 determines the driver state based on the excitement sedation degree ES, the normal excitement sedation degree ES0, and the reference value α (S44). In addition, the method of determining a driver | operator state should just be the same method as S24-S30 in a route search process. Next, the control unit 2 determines whether or not the driver state has changed since the previous determination (S45). When the driver state has changed (Y in S45), the control unit 2 re-searches the guide route according to the changed driver state (S46), and returns to S40. That is, when the driver state becomes an excited state, a guide route that decreases the excitement sedation level ES is searched, and when the driver state becomes an oversedation state, a guide route that increases the excitement level sedation ES is searched. When a normal state is found, a normal guidance route is searched. On the other hand, if the driver state has not changed (N in S45), the control unit 2 returns to S40 without re-searching the guidance route. The re-search process is repeatedly executed at predetermined time intervals until the vehicle arrives at the destination or stops traveling (ignition is turned off).

  If the destination is input before the measurement data regarding the driver's condition is stabilized, such as immediately after the driver gets on the vehicle, the route search process should be executed assuming that the driver's state is the normal state. Alternatively, a normal route search may be performed, and the re-search process may be executed after the measurement data is stabilized after a predetermined time has elapsed.

  Here, the procedure in which the control unit 2 executes the preference storage process shown in FIG. 5 will be described. When the vehicle starts traveling, the control unit 2 starts the preference storage process. In the preference storage process, the control unit 2 first acquires road information on the road on which the vehicle is traveling from the storage unit 4 (S50). Next, the control unit 2 acquires measurement data of biological information from the biological sensor 20 via the communication unit 8 (S51), and determines whether or not all types of measurement data have been acquired (S52). When there is unacquired measurement data (N in S52), the control unit 2 returns to S51 again. On the other hand, when all types of measurement data are acquired (Y in S52), the control unit 2 calculates the excitement sedation level ES based on the measurement data of the biological information (S53), and the control unit 2 receives the data from the storage unit 4. The normal excitement sedation level ES0 is acquired (S54).

  Next, the control unit 2 determines whether or not the value obtained by subtracting the normal excitement sedation level ES0 from the calculated excitement sedation level ES is equal to or greater than the reference value α (S55). When the value obtained by subtracting the normal excitement sedation level ES0 from the excitement sedation level ES is equal to or greater than the reference value α (Y in S55), the control unit 2 determines that the driver state is the excited state (S56), and the acquired road The history information is stored in the storage unit 4 in association with the information and the excitement state (S57). That is, history information that the degree of excitement and sedation increases when traveling on a route having the road information is stored. For example, when the driving route has an uphill road information and the driver's state is in an excited state, the history information that the excitement sedation level is increased by driving on the uphill route is stored.

  On the other hand, when the value obtained by subtracting the normal excitement sedation level ES0 from the excitement sedation level ES is less than the reference value α (N in S55), the control unit 2 subtracts the normal excitement sedation level ES0 from the calculated excitement sedation level ES. It is determined whether or not the value is equal to or less than a reference value −α (S58). When the value obtained by subtracting the normal excitement sedation ES0 from the calculated excitement sedation ES is equal to or less than the reference value −α (Y in S58), the control unit 2 determines that the driver state is an oversedation state (S59). ), The acquired road information and the excessively sedated state are associated with each other, and the history information is stored in the storage unit 4 (S60). That is, history information that the degree of excitement and sedation decreases when traveling on a route having the road information is stored. For example, when the driving route has road information that is a straight line, if the driver's state becomes an excessively sedative state, history information that the excitement and sedation level is reduced by traveling on the route having a straight line is stored.

  The control unit 2 returns to S50 after S57 or S60, and the preference storage process is repeatedly executed until the vehicle stops traveling. The preference storage process may be executed regardless of whether or not the vehicle is route-guided. As described above, the history information in which the road information and the driver state are associated is stored in the preference storage process. In S26 and S29 of the route search process and S46 of the re-search process, a guide route that decreases or increases the excitement sedation level ES is searched based on the history information.

  With the above configuration, by determining whether the driver state is the normal state, the excitement state different from the normal state, or the excessively sedated state, other than the guide route corresponding to the normal state It is possible to search for a guide route corresponding to each of the excited state and the excessively sedated state, and to search for an appropriate guide route.

  Further, a guidance route that decreases the excitement sedation level ES when the driver state is an excited state, and a guide route that increases the excitement sedation level ES when the driver state is an oversedated state. By searching for, a driver in an excited state or an oversedated state can be brought close to a normal state.

  Furthermore, while storing history information associating the driver state and road information while traveling, searching for a guide route based on this history information also takes into account the driver's preference and weakness, etc. A more appropriate guide route can be searched.

  Furthermore, when the driver's state changes by traveling according to the guidance route by determining the driver's state even when the vehicle is running and re-searching the guidance route when the driver's state changes. The guide route corresponding to the changed state can be searched again, and a more appropriate guide route can be searched.

  In addition, this invention is not limited to the said Example, The other deformation | transformation etc. which can achieve the objective of this invention are included in this invention.

  For example, in the above-described embodiment, the excitement sedation level ES as the biometric index is calculated based on the measurement data of the biometric information by the biosensor 20, but a biometric index other than the excitement sedation level ES may be calculated. A plurality of biological indices may be independently calculated from each measurement data. For example, sleepiness information indicating the strength of the driver's sleepiness may be calculated as a biometric index based on the driver's blink information. Further, the excitement level and the sedation level may be calculated independently. Furthermore, the biometric sensor 20 may calculate a biometric index based on the measurement data of the biometric information, and the route search device 1 may acquire the biometric index by the communication unit 8.

  In the embodiment, it is determined whether the driver state is the normal state, the excitement state, or the oversedation state. However, any of the four or more types including the normal state is determined. You may determine whether it is in a state. For example, the driver is in a normal state, in an excited state, in a stressed state, in a tense state, in a sleepy state feeling sleepy, or in a bored state feeling bored It may be determined whether or not there is.

  Moreover, in the said Example, when the driving | running | working driver | operator state is an excitement state or an excessively sedative state, the log | history information which linked | related the driver state and road information shall be memorize | stored in the memory | storage part 4. However, you may memorize | store the historical information which linked | related the change of the driver | operator state with road information. That is, when the driver state changes from the excited state to the normal state, or when the driver state changes from the oversedated state to the normal state, history information that associates the driver state with the road information may be stored. Moreover, even if the driver state has not changed, history information in which the increase or decrease in the value of the excitement sedation level ES is associated with the road information may be stored. Moreover, the structure which does not memorize | store history information may be sufficient.

  In the above-described embodiment, the guidance route is searched again when the driver state changes. However, the guidance route may be searched again even when the driver state does not change. For example, if a driver in an excited state is guided by a guidance route that decreases the excitement sedation level ES, but the excitement level sedation level ES does not decrease and the excited state continues, the excitement level sedation level ES is further increased. You may re-search for the guidance route which decreases. Moreover, the structure which does not re-search a guidance route | root may be sufficient.

  In addition, the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, although the present invention has been particularly illustrated and described with respect to particular embodiments, it will be understood that the present invention is not limited in shape to the embodiments described above without departing from the scope and spirit of the invention. Various modifications can be made by those skilled in the art in terms of materials, quantity, and other detailed configurations. Therefore, the description limiting the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such is included in this invention.

10 route search device 2 control unit (reference acquisition unit, state determination unit, route search unit, road information acquisition unit)
4 storage unit 8 communication unit (index acquisition unit)

Claims (8)

An index acquisition unit for acquiring a biological index related to biological information of a driver of a mobile object;
A reference acquisition unit for acquiring a determination reference value for the biological index;
A state determination unit that determines a driver state that is the state of the driver based on the biometric index and the determination reference value;
A route search device comprising: a route search unit that searches for a guide route to a destination based on the driver state. The biometric index includes a degree of excitement sedation indicating the degree of excitement of the driver,
The state determination unit determines that the driver state is an excited state when the excitement sedation level is higher than the determination reference value than the normal excitement sedation level, and the determination reference value is higher than the normal excitement sedation level. The route search device according to claim 1, wherein the driver state is determined to be an excessively sedated state when the vehicle is low.   The route search unit searches for a guidance route that decreases the excitement sedation level when the driver state is the excitement state, and increases the excitement sedation level when the driver state is the oversedation state. The route search device according to claim 2, wherein the route search device searches for a guide route to be executed. A history information acquisition unit that acquires history information that associates the past driver state with road information;
The route search device according to claim 1, wherein the route search unit searches for a guide route based on the history information. The state determination unit determines the driver state when the moving body is traveling according to the guide route,
The route search device according to any one of claims 1 to 4, wherein the route search unit re-searches for a guide route according to the state of the driver who is traveling. An index acquisition step of acquiring a biological index related to biological information of a driver of the moving body;
A reference acquisition step of acquiring a determination reference value for the biological index;
A state determination step of determining a driver state that is the state of the driver based on the biometric index and the determination reference value;
A route search step of searching for a guide route to the destination based on the driver state.   A route search program that causes a computer to execute the route search method according to claim 6.   A computer-readable recording medium storing the route search program according to claim 7.

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