JP2015148528A - Power consumption prediction device, navigation device using the same, and power consumption prediction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power consumption prediction device, a navigation device using the same, and a power consumption prediction method capable of improving accuracy in predicting the power consumption of an air conditioner.SOLUTION: A power consumption prediction device includes: an actual result recording unit 15 for allowing an actual result data storage unit 16 to store meteorological information, an air conditioner actuation time, and a vehicle travel time by association during the traveling of a vehicle; a correction value calculation unit 17 for calculating the ratio of the actuation time to the travel time for each item of meteorological information as a correction value; and a power consumption prediction unit 19 for predicting the power consumption of an air conditioner with the use of the correction value corresponding to the meteorological information acquired at the time of prediction. A correction value corresponding to a meteorological condition at the time of prediction is acquired based on the actual values of an actuation time and a travel time stored in the actual result data storage unit 16 during the past traveling of the vehicle, and then the power consumption is predicted with the use of the correction value. Thus, the power consumption is accurately predicted in accordance with the actual use state of the air conditioner by a user using the vehicle.

Description

  The present invention relates to a power consumption prediction device, a navigation device using the same, and a power consumption prediction method, and more particularly, to a power consumption prediction device that predicts power consumption of a vehicle during traveling and a function that predicts and displays a remaining battery level. It is suitable for use in a navigation device.

  2. Description of the Related Art Conventionally, in an electric vehicle (EV), power consumption of a vehicle during traveling is predicted, and a predicted value of the remaining battery level is calculated and displayed on a display device based on the prediction result. For example, in a navigation device mounted on an electric vehicle, as shown in FIG. 7, the estimated remaining battery capacity is displayed for each point on the route on the process guide screen. The predicted remaining battery capacity is calculated by subtracting the predicted power consumption from the current remaining battery capacity to each point.

  Here, the predicted power consumption of the vehicle is represented by the sum of the travel power consumption whose consumption dynamically fluctuates with traveling and the steady power consumption that is regularly consumed by electrical components such as an air conditioner. The prediction calculation for this purpose is designed by each company, but the steady power consumption portion is generally predicted by a calculation of steady value × travel time. For example, the power consumption of an electrical component is detected at the start of traveling, and the steady power consumption during traveling is predicted using this as a steady value.

  However, the air conditioner may be turned on or off during actual driving. For this reason, the value of the steady power consumption that is predicted on the assumption that the power consumption detected at the start of travel continues during the subsequent travel may be significantly different from the value of the actual power consumed. There was a problem. In addition, when the air conditioner is kept on because the estimated remaining battery capacity is sufficient, the actual power consumption is larger than the predicted value and the remaining battery capacity is insufficient, resulting in a so-called electric shortage. There was also a problem that there was.

  Note that the error between the estimated fuel consumption and the actual fuel consumption can be reduced by correcting the estimated fuel consumption of the vehicle at the predetermined point based on the weather information (temperature, pressure, etc.) at the predetermined point. The technique made into this is proposed (for example, refer patent document 1). For example, when the temperature and temperature of the estimation target point are higher than the predetermined reference temperature and reference humidity, it is considered that the operation rate of the air conditioner is increased, and thus the estimated fuel consumption amount is increased. Further, in a time zone in which the past average humidity and average temperature are equal to or higher than a certain level, the estimated fuel consumption amount is corrected so as to increase as the air conditioner is operating.

WO 2010/116481

  According to the technique described in Patent Literature 1, it is possible to increase the accuracy of prediction by adding correction, compared to the case of simply predicting power consumption using a steady value. However, since the technique described in Patent Document 1 corrects the estimated fuel consumption amount by a predetermined amount, assuming that the air conditioner is operating when certain weather conditions are met, the accuracy of prediction I have to say that is still low.

  In other words, estimating that the air conditioner is operating when certain weather conditions are met is not a highly accurate method. This is because the air conditioner does not always operate even in an environment that satisfies the weather conditions determined in advance by the manufacturer, since the weather conditions are uncomfortable depending on the person. Conversely, the air conditioner may be operated even in an environment that does not satisfy the predetermined weather conditions.

  Further, even if the user actually operates the air conditioner as estimated based on the weather conditions, it cannot be said that the accuracy of the correction amount is high. Actually, the air conditioner may be turned on or off, so even if it is corrected by a predetermined amount, the correction value itself is not the same as the actual power consumed by the air conditioner. This is because it may become large.

  The present invention has been made to solve such a problem, so that the prediction accuracy of the power consumption by the air conditioner can be further improved, and the error between the predicted power consumption and the actual power consumption can be further reduced. The purpose is to do.

  In order to solve the above-described problems, in the present invention, when the vehicle travels, the weather information, the operation time of the air conditioner, and the travel time of the vehicle are associated with each other and stored in the storage medium at any time, and the operation stored in association with the weather information is stored. Based on the time and the travel time, the ratio of the operation time to the travel time is calculated for each weather information as a correction value. And the power consumption by an air conditioner until it moves to a predetermined point is predicted using the correction value corresponding to the weather information acquired at the time of prediction.

  According to the present invention configured as described above, according to the weather conditions at the time of prediction based on the actual measured values of the operating time of the air conditioner and the traveling time of the vehicle stored in the storage medium at any time during the past traveling of the vehicle A correction value is obtained, and power consumption is predicted using the correction value. This correction value reflects the actual condition of how much the air conditioner was used by the user who uses the vehicle under what weather conditions. The power consumption of the air conditioner can be predicted with high accuracy. As a result, the error between the predicted power consumption and the actual power consumption can be made smaller than before.

It is a block diagram which shows the function structural example of the navigation apparatus to which the power consumption prediction apparatus by this embodiment is applied. It is a figure for demonstrating the acquisition example of a weather information in case a weather information provision area is divided | segmented into plurality. It is a figure which shows an example of the table information memorize | stored in the correction value memory | storage part of this embodiment. It is a figure which shows an example of the message screen displayed by the message display part of this embodiment. It is a flowchart which shows the operation example of the navigation apparatus by this embodiment. It is a figure which shows an example of the screen displayed at the time of a guidance route search. It is a figure which shows the example of a display of a process guide screen.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram illustrating a functional configuration example of a navigation device 200 to which the power consumption prediction device 100 according to the present embodiment is applied. As shown in FIG. 1, the power consumption prediction apparatus 100 according to the present embodiment includes, as its functional configuration, a weather information acquisition unit 11, an operation state detection unit 12, an operation time measurement unit 13, a travel time measurement unit 14, and a performance recording unit. 15, a performance data storage unit 16, a correction value calculation unit 17, a correction value storage unit 18, and a power consumption prediction unit 19.

  In addition, the navigation device 200 according to the present embodiment incorporates functions related to the above-described power consumption prediction device 100 as its functional configuration, and also includes a map data storage unit 21, a route search unit 22, a remaining battery level detection unit 23, a remaining battery level, and the like. An amount prediction unit 24, a battery remaining amount display unit 25, a message display unit 26, an operation reception unit 27, and an air conditioner control unit 28 are provided.

  Each of the functional blocks can be configured by any of hardware, DSP (Digital Signal Processor), and software. For example, when configured by software, each functional block is actually configured by including a CPU, RAM, ROM, etc. of a computer, and a program stored in a recording medium such as RAM, ROM, hard disk, or semiconductor memory operates. Is realized.

  The map data storage unit 21 stores map data necessary for map display, route search, and the like. The route search unit 22 searches for a guidance route from the current location to the destination based on the map data stored in the map data storage unit 21. The route search unit 22 has a time-priority search condition in which the travel time to the destination is the shortest, a distance-priority search condition in which the travel distance to the destination is the shortest, and the power consumed during travel to the destination is the highest. A route is searched and presented according to a plurality of search conditions such as a search condition with less eco priority, and the route selected by the user is set as a guide route.

  The weather information acquisition unit 11 can be connected to the information providing server 400 such as the Japan Meteorological Agency via the Internet 300, for example, and acquires weather information from the information providing server 400. The acquired weather information is the temperature and humidity of the area including the guidance route searched by the route search unit 22. The area referred to here indicates a regional unit (for example, a municipality unit, a 5 km mesh unit, etc.) in which the information providing server 400 provides weather information. In addition, as shown in FIG. 2, when the guidance route is long and the weather information providing area including the entire route is divided into a plurality, the weather information acquisition unit 11 acquires, for example, the temperature and humidity of each area, The average temperature and average humidity are calculated and output.

  The operating state detection unit 12 acquires operating state information indicating an operating state of an air conditioner installed in the vehicle via an in-vehicle network such as a CAN (Controller Area Network), and operates the air conditioner based on the operating state information. Detect state. The operating state information acquired here is air conditioner on / off information.

  The operating time measuring unit 13 measures the time during which the air conditioner is operating based on the operating state of the air conditioner sequentially detected by the operating state detecting unit 12 when the vehicle is traveling. Specifically, the operation time measuring unit 13 measures the time during which the air conditioner is turned on when the vehicle is traveling from the departure point of the guidance route to the destination. The travel time measuring unit 14 measures the travel time of the vehicle. Specifically, the travel time measurement unit 14 measures the time that the vehicle travels from the departure point of the guidance route to the destination.

  The performance recording unit 15 includes an air conditioner operating time measured by the time measuring unit 13 during travel of the vehicle from the departure point to the destination of the guidance route, and a vehicle travel time measured by the travel time measuring unit 14 during the same travel. And the weather information acquired by the weather information acquisition unit 11 during the same travel are associated with each other and stored in the performance data storage unit 16 as performance data during the travel. The performance record unit 15 associates the operation time of the air conditioner, the travel time of the vehicle, and the weather information every time the vehicle runs with the guidance route set, and stores it in the performance data storage unit 16 as needed.

  The correction value calculation unit 17 calculates the ratio of the operation time to the travel time as a correction value based on the operation time and the travel time stored in association with the weather information in the record data storage unit 16. Specifically, the correction value calculation unit 17 uses, as the correction value, the ratio of the operation time to the travel time based on the operation time and the travel time associated with each piece of weather information stored in the record data storage unit 16. The calculated value is stored in the correction value storage unit 18 as table information.

  FIG. 3 is a diagram illustrating an example of table information stored in the correction value storage unit 18. The table information shown in FIG. 3 is two-dimensional matrix table information in which the vertical axis indicates the temperature categorized in increments of 5 ° C. and the horizontal axis indicates the humidity categorized in increments of 5%, and the correction calculated by the correction value calculation unit 17. A value is stored in each cell of the matrix. When the operation time and the travel time related to a plurality of times of travel are stored in the performance data storage unit 16 with respect to the temperature and humidity in the range corresponding to one cell, the correction value calculation unit 17 is configured for a plurality of total travel times. The ratio of the total operating time is calculated as a correction value and stored in the corresponding cell in the table.

  The power consumption prediction unit 19 uses the correction value stored in the correction value storage unit 18 for the weather information acquired by the weather information acquisition unit 11 at the time of prediction, and consumed by the air conditioner until moving to a predetermined point. Predict power (steady power consumption). Specifically, the power consumption prediction unit 19 predicts the power consumption by the air conditioner by multiplying the steady value of power consumption obtained in advance, the travel time to a predetermined point, and the correction value.

  Here, the predetermined point is, for example, the destination of the guidance route. The predetermined point may be a transit point in addition to the destination of the guidance route. Furthermore, the predetermined point may be a guidance intersection for making a right or left turn in addition to the destination or waypoint of the guidance route. When a highway is included in the guide route, an interchange, a junction, a service area, a parking area, or the like may be set as a predetermined point.

  The travel time to these predetermined points is calculated from the distance from the departure point to the predetermined point indicated by the map data stored in the map data storage unit 21 and the predicted travel speed. The predicted traveling speed is assumed to be the legal speed of the road on the guidance route indicated by map data, for example. In addition, when a traffic jam occurs on the guidance route, a travel time to a predetermined point is calculated by adding a weight according to the traffic jam degree and distance.

  As the steady value of power consumption, for example, a preset value (for example, an average value of power consumption when the air conditioner is on and parking) is used for each temperature and humidity range categorized as shown in FIG. In this case, a steady value may be stored together with the correction value in the table information shown in FIG. Further, the power consumption of the air conditioner may be detected when the guidance route is searched by the route search unit 22 and used as a steady value. The power consumption of the air conditioner in this case can be acquired by the operating state detection unit 12. In addition, as the steady value of power consumption, the above-described average value may be set for each range of temperature and humidity, or one average value may be set as a whole regardless of temperature and humidity.

  The power consumption prediction unit 19 also performs prediction of travel power consumption in which the amount of consumption dynamically varies with travel. For example, the power consumption prediction unit 19 uses the predicted travel speed when traveling on the guidance route, the state of the road on the guidance route (information obtained from map data such as road classification, road width, and gradient), and road traffic information such as traffic jams. Etc. is used to predict travel power consumption according to a predetermined calculation formula. It should be noted that various known methods can be applied to the prediction of the travel power consumption, and detailed description thereof is omitted here.

  The battery remaining amount detection unit 23 detects the current remaining amount of a battery (not shown) mounted on the vehicle based on battery remaining amount information transmitted via an in-vehicle network such as CAN, for example. The battery remaining amount predicting unit 24 subtracts the steady power consumption and the running power consumption predicted by the power consumption predicting unit 19 from the current battery remaining amount detected by the battery remaining amount detecting unit 23, thereby Estimate the battery level.

  The remaining battery level display unit 25 causes the display unit 500 to display the remaining battery level predicted by the remaining battery level prediction unit 24. For example, when the route search unit 22 searches for a guidance route, the battery remaining amount display unit 25 causes the display unit 500 to display the predicted battery remaining amount at the destination of the guidance route along with the guidance route. When the process guide screen is displayed as shown in FIG. 7, the battery remaining amount display unit 25 displays a predetermined number of guidance intersections located ahead of the vehicle current location (if the vehicle is traveling on a highway, a predetermined number of interchanges, The predicted battery remaining amount in the junction, service area, and parking area) is displayed on the display unit 500 together with the process guide.

  When displaying the predicted battery remaining amount at the destination of the guidance route, when the route search unit 22 searches for the guidance route, the power consumption prediction unit 19 predicts the power consumption when traveling to the destination. From the predicted value, the remaining battery capacity prediction unit 24 may predict the remaining battery capacity at the destination.

  On the other hand, when displaying the predicted battery remaining amount at a plurality of points on the process guide screen, for example, each time one point passes, the power consumption prediction unit 19 predicts the power consumption when traveling to a plurality of points, respectively, From the predicted value, the remaining battery capacity prediction unit 24 predicts the remaining battery capacity at a plurality of predetermined points.

  The message display unit 26 is a case where a correction value used for power consumption prediction by the power consumption prediction unit 19 is equal to or less than a predetermined value, and the air conditioner is in operation based on the operation state information acquired by the operation state detection unit 12. Is displayed, a message for prompting the air conditioner to stop is displayed on the display unit 500. FIG. 4 is a diagram illustrating an example of a message screen displayed by the message display unit 26. As shown in FIG. 4, buttons 41 and 42 for the user to perform an affirmative or negative response operation are displayed on the message screen.

  The operation receiving unit 27 receives a user operation on the operation unit 600. Specifically, the operation of the affirmative button 41 or the negative button 42 displayed on the message screen is accepted. The air conditioner control unit 28 controls the air conditioner to be stopped by transmitting a control signal to the air conditioner via the CAN when the operation accepting unit 27 accepts the operation of the affirmative button 41.

  FIG. 5 is a flowchart showing an operation example of the navigation device 200 according to the present embodiment configured as described above. Here, as an example, a case where the predicted remaining battery level at the destination of the guidance route is displayed will be described. In this case, the flowchart shown in FIG. 5 starts when the route search unit 22 searches for a guidance route.

  First, the weather information acquisition part 11 acquires the temperature and humidity of the weather information provision area including the whole guidance route from the information provision server 400 connected via the Internet 300 (step S1). Moreover, the operation state detection part 12 detects the operation state of an air conditioner based on the operation state information of the air conditioner transmitted via CAN (step S2). Furthermore, the remaining battery level detection unit 23 detects the current remaining battery level based on the remaining battery level information transmitted via the CAN (step S3). Note that the processing in step S2 and step S3 is subsequently performed until the destination of the guidance route is reached.

  In addition, the operation time measurement unit 13 starts measuring the operation time of the air conditioner, and the travel time measurement unit 14 starts measuring the travel time of the vehicle (step S4). In addition, the power consumption prediction unit 19 uses the correction value stored in the correction value storage unit 18 regarding the weather information acquired by the weather information acquisition unit 11 in step S <b> 1 until moving to the destination of the guidance route. The steady power consumption by the air conditioner is predicted (step S5). At this time, the power consumption prediction unit 19 also performs prediction of travel power consumption.

  Next, the battery remaining power predicting unit 24 uses the steady power consumption and the running power predicted by the power consumption predicting unit 19 in step S5, and the current battery remaining power detected by the battery remaining power detecting unit 23 in step S3. The remaining battery level at the destination is predicted by subtracting from (step S6). Then, the battery remaining amount display unit 25 displays the battery remaining amount predicted by the battery remaining amount prediction unit 24 on the display unit 500 (step S7).

  Here, the message display unit 26 indicates that the correction value used for the power consumption prediction by the power consumption prediction unit 19 in step S5 is equal to or less than a predetermined value, and the operation state detection unit 12 is operating the air conditioner in step S2. Is detected (step S8). And when this determination condition is not satisfy | filled, a process transfers to step S12. On the other hand, when this determination condition is satisfied, the message display unit 26 causes the display unit 500 to display a message screen that prompts the air conditioner to stop (step S9).

  Thereafter, the air conditioner control unit 28 determines whether or not the operation receiving unit 27 has received an operation of the affirmative button 41 (step S10). Here, when the operation reception unit 27 determines that the operation of the negative button 42 has been received, the process proceeds to step S12. On the other hand, if it is determined that the operation accepting unit 27 has accepted the operation of the affirmative button 41, the air conditioner control unit 28 controls the air conditioner to stop by transmitting a control signal to the air conditioner via the CAN (step S11). ).

  In step S12, the performance recording unit 15 determines whether the vehicle has arrived at the destination. When the vehicle has arrived at the destination, the performance recording unit 15 starts the measurement at step S4 at the departure point of the guidance route and then operates the air conditioner operation time measured by the operation time measurement unit 13 from arrival at the destination. The vehicle travel time measured by the travel time measurement unit 14 from the start of measurement in step S4 to the arrival at the destination is associated with the weather information acquired by the weather information acquisition unit 11 in step S1. The data is stored in the data storage unit 16 (step S13).

  The correction value calculation unit 17 calculates a correction value related to the weather information stored in the record data storage unit 16 in step S13 (step S14). That is, the correction value calculation unit 17 relates to the weather information, the operation time of the air conditioner and the travel time of the vehicle that have been stored in the actual data storage unit 16 until then, the operation time newly added and stored in step S13, and Based on the travel time, the ratio of the total operation time to the total travel time is calculated as a correction value.

  Finally, the correction value calculation unit 17 updates and stores the correction value calculated as described above in the corresponding weather information cell in the table information of the correction value storage unit 18 (step S15).

  As described above in detail, in the present embodiment, when the vehicle travels, the weather information, the operating time of the air conditioner, and the traveling time of the vehicle are associated with each other and stored in the performance data storage unit 16 as needed. Then, based on the operation time and travel time stored in association with the weather information in the performance data storage unit 16, the ratio of the operation time to the travel time is calculated as a correction value, and this is stored in the correction value storage unit 18 as table information. Remember. After that, the power consumption by the air conditioner until moving to a predetermined point is predicted using the correction value stored in the table information regarding the weather information acquired at the time of prediction.

  According to the present embodiment configured as described above, when predicting the power consumption of the air conditioner until moving to a predetermined point, the operation time of the air conditioner and the vehicle stored at any time in the past data storage unit 16 during the past driving of the vehicle Based on the actual measurement value with the travel time, a correction value corresponding to the weather condition at the time of prediction is obtained, and the power consumption is predicted using the correction value. Therefore, it is possible to accurately predict the power consumption of the air conditioner according to the actual condition of the use of the air conditioner of the user who uses the vehicle, and make the error between the predicted power consumption and the actual power consumption smaller than before. be able to.

  Thus, for example, when the route search unit 22 searches for a guidance route, when presenting each route searched according to the time priority, distance priority, and eco priority search conditions as shown in FIG. Based on this, the eco route can be guided more accurately.

  Further, in the present embodiment, when the correction value used when predicting the power consumption as described above under a certain weather information condition is equal to or less than a predetermined value, a message prompting the stop of the air conditioner is displayed. Yes. In this case, it has been shown that the ratio of using air conditioners in the past under the same weather conditions is low, so it can be said that there is a high possibility that it will not be necessary to use air conditioners again. Therefore, it is possible to suppress unnecessary power consumption due to wasteful use of the air conditioner by displaying a message and prompting the stop of the air conditioner.

  In addition, although the said embodiment demonstrated the example which calculates a correction value beforehand for every categorized weather information and memorize | stores it as table information in the correction value memory | storage part 18, this invention is not limited to this. For example, when the power consumption is predicted, the correction value may be calculated in real time based on the operating time of the air conditioner and the traveling time of the vehicle stored in the record data storage unit 16. In this case, the correction value calculation unit 17 travels based on the operation time and travel time associated with the weather information acquired by the weather information acquisition unit 11 among the performance data stored in the performance data storage unit 16. The ratio of operating time to time is calculated as a correction value.

  Moreover, although the said embodiment demonstrated the example which makes the period which measures time by the operation time measurement part 13 and the travel time measurement part 14 the period when a vehicle drive | works from the departure place of a guidance route to the destination, this invention. Is not limited to this. For example, it may be a period from when the power of the navigation device 200 is turned on to when it is turned off, or may be a period from when an accessory key (ACC power supply) of the vehicle is turned on to when it is turned off.

  Moreover, although the said embodiment demonstrated the example which categorizes the temperature of the table information which memorize | stores a correction value in 5 degreeC increments and humidity in 5% increments, this step width is only an example and is not limited to this. For example, the temperature may be set in increments of 1 ° C., and the humidity may be set in increments of 1%. Also, for temperature and humidity where the correction value is likely to be 50 ± n% (n is an arbitrary value), the step size is reduced (for example, in increments of 1 ° C., increments of 1%), and other temperatures and Regarding the humidity, the step width may be increased (for example, in increments of 10 ° C., in increments of 10%).

  Moreover, in the said embodiment, when the weather information provision area including the whole guidance route | guide route is divided | segmented into plurality, it is set as one weather information by acquiring the temperature and humidity of each area, and calculating an average value, Although the example which memorize | stores one performance data in the whole path | route in the performance data storage part 16 was demonstrated, this invention is not limited to this. For example, the result data may be generated separately for each of the plurality of weather information providing areas and stored in the result data storage unit 16.

  In addition, each of the above-described embodiments is merely an example of implementation in carrying out the present invention, and the technical scope of the present invention should not be construed in a limited manner. That is, the present invention can be implemented in various forms without departing from the gist or the main features thereof.

DESCRIPTION OF SYMBOLS 11 Meteorological information acquisition part 12 Operation | movement state detection part 13 Operation | movement time measurement part 14 Travel time measurement part 15 Result recording part 16 Result data storage part 17 Correction value calculation part 18 Correction value storage part 19 Power consumption prediction part 21 Map data storage part 22 Route search unit 23 Battery remaining amount detection unit 24 Battery remaining amount prediction unit 25 Battery remaining amount display unit 26 Message display unit 27 Operation reception unit 28 Air conditioner control unit 100 Power consumption prediction device 200 Navigation device

Claims (8)

A weather information acquisition unit for acquiring weather information;
An operating state detector for detecting an operating state of an air conditioner installed in the vehicle;
An operating time measuring unit that measures the time during which the air conditioner is operating based on the operating state sequentially detected by the operating state detecting unit during travel of the vehicle;
A travel time measuring unit for measuring the travel time of the vehicle;
The operation time measured by the time measurement unit when the vehicle is traveling, the travel time measured by the travel time measurement unit during the same travel, and the weather information acquired by the weather information acquisition unit during the same travel are associated with each other. A performance recording unit to be stored in a storage medium at any time;
A correction value calculation unit that calculates a ratio of the operation time to the travel time as a correction value based on the operation time and the travel time stored in association with the weather information in the storage medium;
A power consumption prediction unit that predicts power consumption by the air conditioner until moving to a predetermined point using the correction value calculated by the correction value calculation unit with respect to the weather information acquired by the weather information acquisition unit. The power consumption prediction apparatus characterized by the above-mentioned. The correction value calculation unit calculates, as the correction value, the ratio of the operation time to the travel time based on the operation time and the travel time associated with each piece of weather information stored in the storage medium by the record recording unit. , Stored in the correction value storage unit as table information,
The power consumption prediction unit predicts power consumption by the air conditioner until moving to a predetermined point using the correction value stored in the correction value storage unit with respect to the weather information acquired by the weather information acquisition unit. The power consumption prediction apparatus according to claim 1. The correction value calculator is based on the operation time and the travel time associated with the weather information acquired by the weather information acquisition unit among the information stored in the storage medium by the record recording unit. Calculate the percentage of operating time as a correction value,
The power consumption prediction unit according to claim 1, wherein the power consumption prediction unit predicts power consumption by the air conditioner until moving to a predetermined location using the correction value calculated by the correction value calculation unit. Prediction device.   The power consumption prediction unit predicts power consumption by the air conditioner by multiplying a steady value of power consumption obtained in advance, a travel time to a predetermined point, and the correction value. The power consumption prediction apparatus described in 1. A weather information acquisition unit for acquiring weather information;
An operating state detector for detecting an operating state of an air conditioner installed in the vehicle;
An operating time measuring unit that measures the time during which the air conditioner is operating based on the operating state sequentially detected by the operating state detecting unit during travel of the vehicle;
A travel time measuring unit for measuring the travel time of the vehicle;
The operation time measured by the time measurement unit when the vehicle is traveling, the travel time measured by the travel time measurement unit during the same travel, and the weather information acquired by the weather information acquisition unit during the same travel are associated with each other. A performance recording unit to be stored in a storage medium at any time;
A correction value calculation unit that calculates a ratio of the operation time to the travel time as a correction value based on the operation time and the travel time stored in association with the weather information in the storage medium;
Using the correction value calculated by the correction value calculation unit with respect to the weather information acquired by the weather information acquisition unit, the steady power consumption by the air conditioner until moving to a predetermined point is predicted, and as the vehicle travels A power consumption predicting unit for predicting a driving power consumption whose consumption varies dynamically;
A battery remaining amount detecting unit for detecting a current remaining amount of a battery mounted on the vehicle;
A battery remaining capacity predicting section that predicts the remaining battery capacity at a predetermined point by subtracting the power consumption predicted by the power consumption predicting section from the current battery remaining capacity detected by the battery remaining capacity detecting section;
A navigation apparatus comprising: a battery remaining amount display unit configured to display a battery remaining amount predicted by the battery remaining amount predicting unit on a display unit.   If the correction value used for power consumption prediction by the power consumption prediction unit is less than or equal to a predetermined value and the operation state detection unit detects that the air conditioner is operating, the air conditioner is stopped. The navigation device according to claim 5, further comprising a message display unit that displays a message prompting the user to display the message on the display unit. The message display unit displays a button for a user to perform an affirmative or negative response operation on a screen on which a message prompting to stop the air conditioner is displayed,
The navigation device according to claim 6, further comprising an air conditioner control unit that controls the air conditioner to stop when the positive response operation is performed. A first step in which a weather information acquisition unit of the power consumption prediction apparatus acquires weather information;
A second step in which an operating state detection unit of the power consumption prediction device sequentially detects an operating state of an air conditioner installed in the vehicle, while the vehicle is running;
While the vehicle is traveling, the operating time measuring unit of the power consumption prediction device measures the time during which the air conditioner is operating when the vehicle is traveling based on the operating state sequentially detected by the operating state detecting unit. A third step;
A fourth step in which the travel time measuring unit of the power consumption prediction device measures the travel time of the vehicle during travel of the vehicle;
The performance recording unit of the power consumption prediction device includes an operation time measured by the time measurement unit when the vehicle is traveling, a travel time measured by the travel time measurement unit during the same travel, and the weather information during the same travel. A fifth step of associating the weather information acquired by the acquisition unit and storing it in the performance data storage unit as needed;
The correction value calculation unit of the power consumption predicting device is configured for the travel time based on the operation time and the travel time stored in association with the weather information for each weather information stored in the actual data storage unit. A sixth step of calculating the ratio of the operating time as a correction value and storing it in the correction value storage unit as table information;
The power consumption prediction unit of the power consumption prediction device uses the correction value stored in the correction value storage unit with respect to the weather information acquired by the weather information acquisition unit, and uses the air conditioner until moving to a predetermined point. And a seventh step of predicting power consumption.

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