JP2015175288A - Fuel consumption amount estimation system, car sharing system, portable terminal, fuel consumption amount estimation method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fuel consumption amount estimation system, car sharing system, portable terminal, fuel consumption amount estimation method and program capable of billing under an accurate fuel consumption amount in a car sharing and capable of executing and operating at a low cost.SOLUTION: This invention comprises a portable terminal and a management server. The portable terminal collects acoustic signal within a vehicle and transmits the collected acoustic signal to the management server. The management server receives the collected acoustic signal within the vehicle, performs an acoustic analysis on the basis of feature of engine sound from the received acoustic signal within the vehicle, extracts an engine speed, performs an acoustic analysis about a frequency range of the extracted engine speed, a frequency deviation and a sound pressure level so as to estimate an accelerator opening degree. Then, the extracted engine speed and the estimated accelerator opening degree are integrated in time series, a coefficient is multiplied to convert a fuel consumption amount.

Description

  The present invention relates to a fuel consumption estimation system, a car sharing system, a mobile terminal, a fuel consumption estimation method, and a program using a sensor provided in a mobile communication device.

  In recent years, a business form called rental car sharing is increasing in the private car rental business. The vehicle usage fee in this business form must be charged based on the vehicle usage time and fuel consumption. Among these, in the current car sharing business, the travel distance is calculated using GPS and converted into fuel consumption in many cases (for example, see Non-Patent Documents 1 and 2).

  Currently, the car sharing business is known to be performed by large-scale businesses. On the other hand, the business can be started from only one vehicle if it receives permission for a private car rental business. For this reason, small-scale business operation forms such as weekday rental of private cars that are used only on weekends and shared use of residents by membership groups or condominium associations are increasing. In the future, there is a need for a car sharing system method that can be operated at a low cost regardless of the size of the business and that can be charged accurately.

  Non-Patent Document 1 shows a typical car sharing fee, and the current car sharing fee is generally charged by the usage time and distance fee. The former usage time can be clearly managed by the registered usage time. Next, the object of charging is the fuel consumption. In current car sharing, the mileage is calculated from the position information of the in-vehicle GPS, and this is converted into the fuel consumption and charged.

JP 07-019484 A Table 2011/096156

http://www.orix-carshare.com/plan/index.htm http://www.docomo.biz/pdf/html/service/module/casestudy002.pdf http://panasonic.co.jp/ptj/v5404/pdf/p0204.pdf "Automatic fuel consumption estimation by smartphone using acoustic signals and multi-sensor signals", IEICE, IEICE Technical Report EA2013-1 (2013-5)

  However, the estimation of combustion consumption by mileage is based on usage conditions such as differences in driving methods such as acceleration and sudden start by the user, uphill and downhill terrain of the driving location, and long-time parking in idling state. It is generally known that the fuel consumption varies greatly depending on the vehicle. For this reason, it is said that the method of converting the fuel consumption amount from the travel distance is inaccurate.

  On the other hand, in order to accurately grasp the fuel consumption, it is conceivable to obtain the fuel consumption data directly from the in-vehicle fuel meter, but the car fuel meter gives the driver the approximate remaining amount in the tank. For the purpose of notification, the amount of undulating liquid is detected by a float or thermistor in a tank shape that is not suitable for measurement, and an accurate amount cannot be measured. In addition, in order to measure an accurate amount, it is necessary to attach a fuel flow meter to the pipe, and it is difficult to start a cheap business because it takes a lot of modification costs to obtain data from now on.

  Moreover, recent vehicles have a self-vehicle diagnosis device called OBDII (On-Board Diagnostics), which is used for inspection and maintenance of vehicles at maintenance shops. However, the contents of the data differ depending on the manufacturer and the vehicle type, and the manufacturer is not easily disclosed because of fear of accidents caused by program falsification by OBDII connection, and it is difficult to use it in general.

  Because of this situation, current car sharing does not know the exact fuel consumption and charges users uniformly on average. Therefore, user dissatisfaction has arisen because it is different from the actual usage burden, which has also hindered the spread of car sharing.

  Therefore, the present invention has been made in view of the above-described problems, and is a fuel consumption estimation system, a car sharing system, a mobile phone, which can be charged and operated at an accurate cost in car sharing. An object is to provide a terminal, a fuel consumption estimation method, and a program.

  The present invention proposes the following matters in order to solve the above problems.

  (1) The present invention comprises a mobile terminal and a management server, wherein the mobile terminal collects sound signals in the vehicle, and transmission means for transmitting the collected sound signals to the management server. And the management server receives from the portable terminal the collected acoustic signal in the vehicle, and performs an acoustic analysis based on the characteristics of the engine sound from the received acoustic signal in the vehicle, and rotates the engine. An extraction means for extracting the number, an estimation means for estimating the accelerator opening by acoustically analyzing the frequency range, frequency shift and sound pressure level of the extracted engine speed, the extracted engine speed and the A fuel consumption estimation system is provided, characterized by comprising a conversion means for converting the fuel consumption by multiplying the estimated accelerator opening in a time series and adding them together and multiplying by a coefficient.

  (2) The present invention includes a portable terminal and a management server, and the portable terminal collects an acoustic signal in the vehicle, an acceleration sensor, the collected acoustic signal in the vehicle, and the acceleration sensor. Transmitting means for transmitting the output value to the management server, wherein the management server receives the collected acoustic signal in the vehicle and the output value of the acceleration sensor from the portable terminal; Extracting means for performing acoustic analysis based on characteristics of engine sound from the received in-vehicle acoustic signal and extracting the engine speed, and estimating means for estimating the accelerator opening by analyzing the received output value of the acceleration sensor And a conversion means for converting the fuel consumption by multiplying the extracted engine speed and the estimated accelerator opening in a time series and adding them together and multiplying by a coefficient. Disappear It has proposed the amount estimation system.

  (3) The present invention includes a portable terminal and a management server, and the portable terminal collects an acoustic signal in the vehicle, an acceleration sensor, the collected acoustic signal in the vehicle, and the acceleration sensor. Transmitting means for transmitting the output value to the management server, wherein the management server receives the collected acoustic signal in the vehicle and the output value of the acceleration sensor from the portable terminal; An acoustic analysis is performed based on the characteristics of the engine sound from the received in-vehicle acoustic signal to extract the engine speed, and the extracted engine speed frequency range, frequency shift, and sound pressure level are acoustically detected. The first estimation means for analyzing and estimating the accelerator opening, the second estimation means for analyzing the received output value of the acceleration sensor to estimate the accelerator opening, and the first estimation means Was The value obtained by weighting both the accelerator opening and the accelerator opening estimated by the second estimating means and the extracted engine speed are integrated in a time series, and the result is multiplied by a coefficient. A fuel consumption estimation system characterized by comprising a conversion means for converting consumption is proposed.

  (4) The present invention comprises a mobile terminal and a management server, wherein the mobile terminal collects sound signals in the vehicle, an acceleration sensor, position information acquisition means for acquiring position information, Transmitting means for transmitting the collected acoustic signal in the vehicle, the output value of the acceleration sensor, and the acquired position information to the management server, wherein the management server receives the collected vehicle interior from the portable terminal. Receiving means for receiving the acoustic signal, the output value of the acceleration sensor and the acquired position information, and extracting the engine speed from the received acoustic signal based on the characteristics of the engine sound and extracting the engine speed A first estimation means for estimating the accelerator opening by acoustically analyzing the means, the frequency range of the extracted engine speed, the frequency shift and the sound pressure level; and the output value of the received acceleration sensor Analyzing and estimating the accelerator opening, and integrating the accelerator opening estimated by the first estimating means and the extracted engine speed in a time series and adding together, Multiply the first conversion means for multiplying the fuel consumption by multiplying the accelerator opening estimated by the second estimation means and the extracted engine speed in time series, and multiply by the coefficient. A second conversion means for converting the fuel consumption and measuring the travel distance from the received position information, obtaining an elevation difference during traveling from an elevation map, and measuring the measured travel distance and the obtained elevation difference And weighting the conversion values in the first conversion means, the second conversion means, and the third conversion means to convert the fuel consumption by performing time integration and summing them in time series Fuel consumption to calculate fuel consumption A calculation unit proposes a fuel consumption estimation system, characterized in that it comprises a.

  (5) The present invention proposes a car sharing system characterized in that charging processing in car sharing is performed using the fuel consumption amount estimation system of (1) to (4).

  (6) The present invention is a sound collecting means for collecting an in-vehicle acoustic signal; an extracting means for performing an acoustic analysis based on the characteristics of the engine sound from the collected in-vehicle acoustic signal and extracting an engine speed; An estimator for estimating the accelerator opening by acoustically analyzing the frequency range, frequency deviation and sound pressure level of the extracted engine speed, and integrating the extracted engine speed and the estimated accelerator position And a conversion means for converting the fuel consumption amount by multiplying them in time series and multiplying by a coefficient, and proposes a portable terminal.

  (7) The present invention performs sound analysis based on the characteristics of the engine sound from the collected sound signal in the vehicle, the sound collecting means for collecting the sound signal in the vehicle, the acceleration sensor, and extracts the engine speed. The extraction means, the estimation means for analyzing the output value of the acceleration sensor to estimate the accelerator opening, the integration of the extracted engine speed and the estimated accelerator opening in time series are added together, and the coefficient And a conversion means for converting the fuel consumption by multiplying by a mobile terminal.

  (8) The present invention performs sound analysis based on the characteristics of the engine sound from the collected sound signal in the vehicle, the sound collecting means for collecting the sound signal in the vehicle, the acceleration sensor, and extracts the engine speed. An extraction means, a first estimation means for estimating the accelerator opening by acoustically analyzing the extracted frequency range, frequency shift and sound pressure level of the engine speed, and the output value of the received acceleration sensor The second estimating means for analyzing and estimating the accelerator opening, and the accelerator opening estimated by the first estimating means and the accelerator opening estimated by the second estimating means are weighted. Proposed is a portable terminal comprising: a conversion means for converting a fuel consumption amount by multiplying a value and the extracted engine speed in a time series and adding the result and multiplying by a coefficient .

  (9) The present invention is based on the characteristics of the engine sound from the collected sound signal in the vehicle, the sound collecting means for collecting the sound signal in the vehicle, the acceleration sensor, the position information acquisition means for acquiring the position information. Extraction means for performing an acoustic analysis and extracting an engine speed, and a first estimation means for estimating an accelerator opening by acoustically analyzing a frequency range, a frequency shift, and a sound pressure level of the extracted engine speed And a second estimating means for analyzing the received output value of the acceleration sensor to estimate the accelerator opening, and an integration of the accelerator opening estimated by the first estimating means and the extracted engine speed Are integrated in a time series and multiplied by a coefficient, and the sum of the accelerator opening estimated by the second estimating means and the extracted engine speed is multiplied by a coefficient. Go in time series A second conversion means that calculates and multiplies the coefficient to convert the fuel consumption, measures a travel distance from the received position information, obtains an altitude difference during travel from an altitude map, and measures the measured travel distance And a third conversion means for converting the fuel consumption by summing up the acquired altitude difference in time series and adding the difference, and in the first conversion means, the second conversion means, and the third conversion means Proposed is a portable terminal comprising fuel consumption calculation means for calculating a fuel consumption by weighting a converted value.

  (10) The present invention proposes a car sharing system characterized in that a billing process in car sharing is performed using the mobile terminal described in (6) to (9).

  (11) The present invention provides a fuel consumption amount in a fuel consumption estimation system comprising a portable terminal provided with sound collection means and transmission means, and a management server provided with reception means, extraction means, estimation means, and conversion means. A first step in which the sound collecting means collects an acoustic signal in a vehicle; and a second step in which the transmission means transmits the collected acoustic signal to the management server. A third step in which the receiving means receives the collected acoustic signal in the vehicle, and the extracting means performs an acoustic analysis based on the characteristics of the engine sound from the received in-vehicle acoustic signal, and calculates the engine speed. A fourth step of extracting, a fifth step of estimating the accelerator opening by acoustically analyzing the extracted engine speed frequency range, frequency shift and sound pressure level; Conversion means And a sixth step of converting the fuel consumption by multiplying the extracted engine speed and the estimated accelerator opening in a time series and multiplying the result and multiplying by a coefficient. A consumption estimation method is proposed.

  (12) The present invention is a fuel consumption estimation method in a portable terminal comprising a sound collection means, a transmission means, a reception means, an extraction means, an estimation means, and a conversion means, wherein the sound collection means A first step of collecting a signal; a second step of transmitting the collected acoustic signal to the management server; and a receiving unit receiving the collected acoustic signal in the vehicle. A third step in which the extraction means performs an acoustic analysis based on the characteristics of the engine sound from the received in-vehicle acoustic signal and extracts an engine speed, and the estimation means includes the extraction And a fifth step of estimating the accelerator opening by acoustically analyzing the frequency range, frequency shift and sound pressure level of the engine speed, and the conversion means includes the extracted engine speed and the estimated accelerator. Opening and Integrating summing performed in time series, has proposed a fuel consumption estimation method characterized by comprising: a sixth step of converting the fuel consumption multiplied by a factor, the.

  (13) The present invention relates to a fuel consumption amount in a fuel consumption estimation system comprising a portable terminal provided with sound collection means and transmission means, and a management server comprising reception means, extraction means, estimation means, and conversion means. A program for causing a computer to execute an estimation method, wherein the sound collection means collects an acoustic signal in a vehicle, and the transmission means transmits the collected acoustic signal to the management server. A second step in which the receiving means receives the collected acoustic signal in the vehicle; and an extracting means for analyzing the sound from the received acoustic signal in the vehicle based on the characteristics of the engine sound. And the estimation means acoustically analyzes the extracted engine speed frequency range, frequency shift, and sound pressure level to estimate the accelerator opening. And a fifth step in which the conversion means adds the extracted engine speed and the estimated accelerator opening in a time series and adds them together, and multiplies the coefficient to convert the fuel consumption. And a program for causing a computer to execute the steps.

  (14) The present invention is a program for causing a computer to execute a fuel consumption estimation method in a portable terminal comprising a sound collection means, a transmission means, a reception means, an extraction means, an estimation means, and a conversion means, The sound collecting means collects an acoustic signal in the vehicle, the first step, the transmitting means sends the collected acoustic signal to the management server, and the receiving means A third step of receiving a sound signal in the vehicle that has been sounded; and a fourth step in which the extraction means performs an acoustic analysis based on the characteristics of the engine sound from the received sound signal in the vehicle and extracts the engine speed. The estimation means acoustically analyzes the extracted engine speed frequency range, frequency shift, and sound pressure level to estimate the accelerator opening, and the conversion means extracts the extracted value. Proposing a program for causing a computer to execute a sixth step of integrating the engine speed and the estimated accelerator opening in a time series and adding them together, and multiplying the coefficient to convert the fuel consumption. Yes.

According to the present invention, it is possible to accurately grasp and charge not only the usage time but also the fuel consumption by using various sensors provided in the mobile terminal, and manage a small- to large-scale car sharing business. There is an effect that it can be realized at low cost using only a portable terminal.
In addition, in the case of conventional rental car use, the tank must be filled with fuel and the car must be returned. By using the present invention, it is possible to eliminate such trouble, and the rental car business and the car sharing business are integrated. The effect is that the business can be easily managed.

It is a figure which shows the whole structure of the fuel consumption estimation system which concerns on embodiment of this invention. It is a figure which shows the functional block of the portable terminal and management server which concern on the 1st Embodiment of this invention. It is the figure which showed the relationship between the engine speed and fuel consumption which made the accelerator opening which concerns on the 1st Embodiment of this invention a parameter. It is the figure which showed the frequency change of the engine booming sound at the time of the acceleration which concerns on the 1st Embodiment of this invention. It is the figure which showed the estimation concept of the driving | running | working state and accelerator opening by the acoustic analysis which concerns on the 1st Embodiment of this invention. It is the figure which showed the example of the three-dimensional numerical table of the accelerator opening by a frequency range, a frequency shift, and a sound pressure level. It is the figure which showed the setting algorithm of the coefficient by the comparison with the estimated value of fuel consumption and the measured value which concern on the 1st Embodiment of this invention. It is a figure which shows the functional block of the portable terminal and management server which concern on the 2nd Embodiment of this invention. It is a figure of the acceleration by the engine at the time of the uphill and downhill driving | running | working which considered the gravity acceleration based on the 2nd Embodiment of this invention. It is the figure which showed the estimation concept of the driving | running | working state and accelerator opening by the analysis of the acceleration sensor which concerns on the 2nd Embodiment of this invention. It is a figure which shows the functional block of the portable terminal and management server which concern on the 3rd Embodiment of this invention. It is the figure which showed the example of a relationship between the acceleration which concerns on the 3rd Embodiment of this invention, and fuel consumption. It is a figure which shows the functional block of the portable terminal and management server which concern on the 4th Embodiment of this invention. It is a figure which shows the functional block of the portable terminal which concerns on the 5th Embodiment of this invention. It is a figure which shows the functional block of the portable terminal which concerns on the 6th Embodiment of this invention. It is a figure which shows the functional block of the portable terminal which concerns on the 7th Embodiment of this invention. It is a figure which shows the functional block of the portable terminal which concerns on the 8th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Note that the constituent elements in the present embodiment can be appropriately replaced with existing constituent elements and the like, and various variations including combinations with other existing constituent elements are possible. Therefore, the description of the present embodiment does not limit the contents of the invention described in the claims.

  As shown in FIG. 1, the present invention includes a management server 200 and a mobile terminal 100. That is, it is a system that can be realized by using a mobile terminal such as a mobile phone or a smartphone without modifying the vehicle or providing special equipment. An application is installed in the mobile terminal 100 in advance, and it is used by placing it in an installation place such as a dashboard in the vehicle when using it. The portable terminal 100 may be personally owned or may be prepared for in-vehicle use by a car sharing company.

  In addition, the management server 200 for managing and managing car sharing reservations and billing requests from the mobile terminal 100 can be realized by an inexpensive personal computer unless it is a large-scale business. Therefore, the operating cost of car sharing can be significantly reduced.

<First Embodiment>
A first embodiment of the present invention will be described with reference to FIGS.

<Configuration of mobile terminal>
As illustrated in FIG. 2, the mobile terminal 100 according to the present embodiment includes a sound collection unit 110, a transmission unit 120, a storage unit 130, and a control unit 140.

  The sound collection unit 110 collects an acoustic signal in the vehicle. The transmission unit 120 transmits the in-vehicle acoustic signal collected by the sound collection unit 110 to the reception unit 210 of the management server 200. The storage unit 130 temporarily stores in-vehicle acoustic signal data collected by the sound collection unit 110. For example, the control unit 140 controls the operations of the sound collection unit 110, the transmission unit 120, and the storage unit 130 based on a control application corresponding to the present embodiment.

<Configuration of management server>
As illustrated in FIG. 2, the management server 200 according to the present embodiment includes a reception unit 210, an extraction unit 220, an estimation unit 230, and a conversion unit 240.

  The receiving unit 210 receives the collected acoustic signal in the vehicle from the transmitting unit 120 of the mobile terminal 100. The extraction unit 220 performs acoustic analysis based on the characteristics of the engine sound from the received in-vehicle acoustic signal, and extracts the engine speed.

  The estimation unit 230 acoustically analyzes the extracted frequency range, frequency shift, and sound pressure level of the engine speed, and estimates the accelerator opening. The conversion unit 240 performs integration of the extracted engine speed and the estimated accelerator opening in a time series and adds up, and multiplies the coefficient to convert the fuel consumption.

  In this embodiment, an example in which data analysis and collection are performed by the management server 200 will be described. However, data analysis and estimation may be performed by the mobile terminal itself, and the result may be transmitted to the management server.

  FIG. 3 shows the relationship between the engine speed and the fuel consumption with the accelerator opening as a parameter. As shown in FIG. 3, it is known that when the accelerator opening is constant, the fuel consumption is proportional to the engine speed, and the fuel consumption varies depending on the accelerator opening even at the same engine speed. As for the accelerator opening, for example, the accelerator opening is high when the vehicle starts from a stop and accelerates, and the accelerator opening is low at the cruising speed. In general, the accelerator opening increases as the vehicle travels at a higher speed. By finely analyzing the state of these vehicles, the fuel consumption can be calculated by the product of the engine speed and the accelerator opening.

  In the present embodiment, first, an acoustic signal in the vehicle is collected by the sound collection unit 110 (for example, a voice microphone) of the mobile terminal 100 in order to grasp the engine speed. The acoustic signal in the vehicle contains various noise components, and the engine speed is acoustically analyzed and extracted by the following method.

  As described in Non-Patent Document 3, vibration due to combustion of the engine propagates through the vehicle body and is radiated as “engine noise” in the passenger compartment. As shown in FIG. 4, the engine booming noise increases in frequency as time elapses, and is composed of a primary component of the engine rotation frequency and its harmonics. The time waveform of the order component of the rotation frequency synchronized with the fuel explosion of the engine is characterized by being almost regarded as a sine wave. In a four-cycle cylinder engine, a secondary component of the rotational frequency, and in a six-cylinder engine, the tertiary component of the rotational frequency is an acoustic component due to the original fuel explosion, and the sound pressure level is very high. The vehicle interior sound contains various noise components, but the engine rotation frequency can be easily extracted by performing acoustic analysis, such as patterning the frequency analysis result using the characteristics of engine noise. . As a detailed method of this acoustic analysis, for example, the methods described in Patent Document 1 and Patent Document 2 are applied.

  On the other hand, the frequency range of the audio signal for calling on a mobile phone is up to 3400 Hz by convention. From idling speed 600 rpm to 4200 rpm at high speed, the combustion secondary frequency is the combustion secondary component in the 4-cycle cylinder engine and the rotational tertiary component in the 6-cylinder engine, which is 200 to 1600 and 300 to 2400 Hz, respectively. It becomes. As described above, since the engine sound exists in a relatively narrow frequency range, it can be sufficiently measured by the voice microphone of the portable terminal.

  As for the accelerator opening, the frequency range of the engine rotation frequency, the time shift of the frequency, and the sound pressure level are measured at regular time intervals, for example, every second. Analyzing this data and classifying the driving state of the vehicle, (1) at the time of departure acceleration, (2) at the time of driving acceleration, (3) at the cruising speed, (4) at high speed, (5) at the time of brake deceleration, or (6) When the vehicle stops, the accelerator opening can be estimated from this. FIG. 5 shows the concept of traveling state classification and accelerator opening estimation by acoustic analysis.

  In FIG. 5, for the sake of explanation, the accelerator opening is shown in a broad classification of five stages (0 to 4/4) in consideration of consistency with FIG. 2, but this accelerator opening estimation table is used as needed. Can be classified and created with more detailed numerical values.

  FIG. 6A shows a three-dimensional table of the frequency range of the rotation frequency, the time shift of the frequency, the three-dimensional parameter of the sound pressure level, and the numerical table of the accelerator opening. The numerical value of the accelerator opening is displayed in five steps (0 to 4/4). Such a three-dimensional relational numerical value table is effective when creating a program. FIG. 6 (2) is an example of a two-dimensional numerical table of the sound pressure level and the accelerator opening in the cross section of the frequency shift when the frequency range is constant, and FIG. 6 (3) further shows the frequency. It is the example which represented on the graph the relationship between the sound pressure level and accelerator opening degree when a range and a frequency shift are made constant.

  The fuel consumption is calculated by accumulating in time series using the following number 1 from the accelerator opening estimated from the three parameter values of engine speed and frequency range, frequency deviation, and sound pressure level measured by acoustic analysis. .

  Here, T: total travel time, t: sample time, a: conversion coefficient, l, m, n: frequency range, frequency shift, and sound pressure level are three parameter values, and the sample time is, for example, 1 second. Measure every time. Further, T is the total travel time of the car, and when accumulated in time series, the fuel consumption during the usage time can be estimated.

  Since the conversion coefficient a differs depending on the vehicle type, the most suitable numerical value is set by comparing the estimated value and the actually measured value by the algorithm shown in FIG. When there is an actual measurement value of fuel consumption in n times of traveling, an appropriate value of the coefficient a (i) is obtained based on the i-th actual measurement value B (i). First, an initial value of the coefficient a (i) is set (step S101), and the fuel consumption A (i) is estimated from the equation 1 (step S102 to step S105). A difference C = A (i) −B (i) between the estimated value and the actually measured fuel consumption B (i) is calculated (steps S106 and S107). If there is a difference, the coefficient a (i) is calculated based on C. Increase or decrease ("No" in step S108), change and repeat recalculation of the estimated value (from step S104 to step S108). When there is almost no difference between the estimated value and the actually measured value, the matched coefficient a (i) for the actually measured value B (i) is recorded (step S109). The coefficient a (i) adapted in the same procedure is obtained and recorded for the actual measured values of different n times of travel (Step S102 to Step S110), and the average of n a (i) recorded at the time of completing n times The value is calculated and finally set as the value of the coefficient a and used during actual operation (step S111).

  Note that, as the car sharing operation progresses, a larger number of n actual measured values can be obtained by traveling, so that the accuracy of the coefficient a can be further increased by the above algorithm. Similarly, the estimated value based on the three parameters is appropriately adjusted so that the accelerator opening (l, m, n) also matches the actually measured value.

<Second Embodiment>
A second embodiment of the present invention will be described with reference to FIGS.

<Configuration of mobile terminal>
As illustrated in FIG. 8, the mobile terminal 100 according to the present embodiment includes a sound collection unit 110, a transmission unit 121, a storage unit 130, a control unit 140, and an acceleration sensor 150. In addition, about the component which attaches | subjects the same code | symbol as 1st Embodiment, since it has the same function, the detailed description is abbreviate | omitted.

  The transmission unit 121 transmits the in-vehicle acoustic signal collected by the sound collection unit 110 and the output value of the acceleration sensor 150 to the reception unit 211 of the management server 200. The acceleration sensor 150 detects the acceleration of the vehicle.

<Configuration of management server>
As illustrated in FIG. 8, the management server 200 according to the present embodiment includes a reception unit 211, an extraction unit 220, an estimation unit 231, and a conversion unit 241. In addition, about the component which attaches | subjects the same code | symbol as 1st Embodiment, since it has the same function, the detailed description is abbreviate | omitted.

  The receiving unit 211 receives the collected acoustic signal in the vehicle and the output value of the acceleration sensor. The estimation unit 231 analyzes the received output value of the acceleration sensor and estimates the accelerator opening. The conversion unit 241 performs integration of the extracted engine speed and the estimated accelerator opening in a time series and adds them together, and multiplies the coefficient to convert the fuel consumption.

<Accelerator opening estimation method using acceleration sensor>
The acceleration and speed are measured by a three-axis acceleration sensor provided in the mobile terminal 100, and the accelerator opening is basically estimated by analyzing these data. The reason for analyzing not only the acceleration but also the speed is that a small accelerator opening is required to obtain acceleration against the air resistance due to the speed and the frictional resistance of the axle or tire.

  In addition, at the time of uphill and downhill, a constant acceleration and speed cannot be obtained unless the accelerator opening is made larger or smaller than that during horizontal running. As shown in FIG. 9, when traveling uphill and downhill, gravity acceleration in the Z-axis direction is distributed in the X-axis direction, which must be taken into consideration. From FIG. 9, the distributed gravitational acceleration in the X-axis direction can be calculated by the square root formula of the sum of squares from the difference in gravity between the horizontal direction and the uphill / downhill direction in the Z-axis direction. As a result, the acceleration in the X-axis direction by the engine when traveling uphill or downhill can be calculated by the following formula 2.

  FIG. 10 shows the concept of estimation of the running state and the accelerator opening by the analysis of the acceleration sensor. The acceleration in FIG. 10 is the acceleration of the engine according to Equation 2. Further, in FIG. 10, for the sake of explanation, the accelerator opening is shown by a broad classification of five stages (0 to 4/4) in consideration of consistency with FIG. 5. If necessary, it can be classified and created with more detailed numerical values.

  Here, the accelerator opening is a function of acceleration and speed of the acceleration sensor, and is expressed by the following equation (3).

Here, v _{x, y, z} : X, Y, Z axis speed, a _{x, y, z} : X, Y, Z axis acceleration, f: Accelerator opening with acceleration and speed shown in FIG. 10 as variables Degree function table, b: Indicates a conversion coefficient to accelerator opening.

  The fuel consumption amount can be calculated by using the equation 1 shown in the first embodiment based on the accelerator opening and the engine speed by acoustic analysis.

  In the present embodiment, when the mobile terminal is placed on the dashboard of the car, it is desirable that the installation base be fixed to the car in order to accurately acquire the data of the triaxial acceleration sensor.

<Third Embodiment>
A third embodiment of the present invention will be described with reference to FIGS.

<Configuration of mobile terminal>
As shown in FIG. 11, the mobile terminal 100 according to the present embodiment includes a sound collection unit 110, a transmission unit 121, a storage unit 130, a control unit 140, and an acceleration sensor 150. Note that the configuration of the present embodiment is the same as the configuration shown in the second embodiment, and a detailed description thereof will be omitted.

<Configuration of management server>
As shown in FIG. 11, the management server 200 according to the present embodiment includes a reception unit 211, an extraction unit 220, a first estimation unit 250, a second estimation unit 260, and a conversion unit 242. ing. In addition, about the component which attaches | subjects the same code | symbol as 1st Embodiment and 2nd Embodiment, since it has the same function, the detailed description is abbreviate | omitted.

  The first estimation unit 250 performs acoustic analysis on the extracted frequency range, frequency shift, and sound pressure level of the engine speed, and estimates the accelerator opening. The second estimating unit 260 analyzes the received output value of the acceleration sensor and estimates the accelerator opening. The conversion unit 242 integrates the value obtained by weighting both the accelerator opening estimated by the first estimating unit 250 and the accelerator opening estimated by the second estimating unit 260 and the extracted engine speed. Are added in time series, and the fuel consumption is converted by multiplying by the coefficient.

<Estimate accelerator position with both acoustic and acceleration sensors>
Each of the accelerator opening estimation methods shown in the first embodiment and the second embodiment has an analysis feature. In order to complement the features of both analyses, the estimated value of the accelerator opening can be obtained more accurately by weighting and summing them according to the following equation (4). For example, the weighting coefficients d and e are not fixed values, and the weighting balance may be changed according to the speed range and the degree of uphill / downhill as necessary.

<Method using acceleration sensor>
In addition, the fuel consumption amount may be directly estimated by a method different from the first to third embodiments using the acceleration value of the three-axis acceleration sensor provided in the portable terminal and the duration thereof. Is possible.

  As shown in the relationship between the acceleration and the fuel consumption in FIG. 12, the larger the positive acceleration, the more the fuel consumption per unit time. If the cruise speed is kept constant, the plus / minus acceleration is small. Consumption is low. In addition, when the vehicle is stopped, the fuel consumption is minimal due to idling. On the other hand, fuel consumption is almost the same as idling with negative acceleration due to normal footbrake, but when using engine brake to obtain large negative acceleration, fuel consumption may increase due to forced intake of the engine . This is different depending on the type of vehicle because recent vehicle types forcibly shut off the fuel and may consume less fuel.

  As shown in FIG. 12, the acceleration sensor has a horizontal X-axis, a Y-axis, and a vertical Z-axis of the vehicle, and the degree of influence of each acceleration on the fuel consumption is different. For example, on the uphill, the fuel consumption for the positive acceleration in the vertical direction is larger than that in the horizontal direction. On the contrary, on the downhill, the fuel consumption is very small for the negative acceleration in the vertical direction. Based on these relationships, the following equation 5 is used to consider the direction of the triaxial acceleration, and the fuel consumption is calculated by adding the respective relational expressions.

Here, T: total travel time, t: sample time (for example, every 1 second), f: a function for converting an acceleration value into fuel consumption.
<Fourth Embodiment>
A fourth embodiment of the present invention will be described with reference to FIG.

<Configuration of mobile terminal>
As illustrated in FIG. 13, the mobile terminal 100 according to the present embodiment includes a sound collection unit 110, a transmission unit 122, a storage unit 130, a control unit 140, an acceleration sensor 150, and a position information acquisition unit 160. It is configured. In addition, about the component which attaches | subjects the code | symbol same as 3rd Embodiment from 1st Embodiment, since it has the same function, the detailed description is abbreviate | omitted.

  The transmission unit 122 transmits the collected acoustic signal in the vehicle, the output value of the acceleration sensor, and the acquired position information to the management server. The position information acquisition unit 160 acquires position information using GPS or the like.

<Configuration of management server>
As shown in FIG. 13, the management server 200 according to the present embodiment includes a reception unit 212, an extraction unit 220, a first estimation unit 250, a second estimation unit 260, and a first conversion unit 270. The second conversion unit 280, the third conversion unit 290, and the fuel consumption calculation unit 300 are configured. In addition, about the component which attaches | subjects the code | symbol same as 3rd Embodiment from 1st Embodiment, since it has the same function, the detailed description is abbreviate | omitted.

  The receiving unit 212 receives the collected acoustic signal in the vehicle, the output value of the acceleration sensor, and the acquired position information. The first conversion unit 270 performs integration of the accelerator opening estimated by the first estimation unit 250 and the extracted engine speed in a time series and adds up, and multiplies the coefficient to convert the fuel consumption. The second conversion unit 280 performs integration of the accelerator opening estimated by the second estimation unit 260 and the extracted engine speed in a time series and adds them together, and multiplies the coefficient to convert the fuel consumption. 3 conversion unit 290 measures the travel distance from the received position information, obtains the difference in altitude during the travel from the altitude map, and sums the measured travel distance and the acquired altitude difference in time series And convert the fuel consumption. The fuel consumption calculation unit 300 calculates the fuel consumption by weighting the conversion values in the first conversion unit 270, the second conversion unit 280, and the third conversion unit 290.

  Since the mobile terminal is equipped with GPS, the position of the car can be specified and the total travel distance of the borrowed time of the car can be calculated, but the fuel consumption cannot be accurately estimated only by this travel distance. In particular, the fuel consumption is greatly different between the uphill and the downhill even at the same travel distance. Therefore, it is desirable to extract the elevation difference between the uphill and downhill using the GPS location information and the map showing the elevation, and calculate the fuel consumption by taking this into account. The map showing the altitude is published electronically at the Geospatial Information Authority of Japan and Google Maps. Specifically, the fuel consumption amount is calculated and accumulated at each sample time from the travel distance and the altitude difference according to the following equation (6).

  Here, T: total travel time, t: sample time (for example, every 5 seconds), g: coefficient for converting fuel consumption from the product of travel distance and altitude difference.

  As another method of obtaining the elevation difference from the elevation map, it is also possible to obtain the elevation difference by measuring the vertical Z-axis movement distance using an acceleration sensor provided in the mobile terminal.

<Examples of application to a car sharing system using a mobile terminal>
As described above, in order to implement the fuel consumption estimation system according to the first to fourth embodiments described above in a car sharing system, a mobile terminal such as a mobile phone or a smartphone is used as shown in FIG. Specifically, first, an application is installed in the mobile terminal. When using a car for car sharing, an application on a mobile terminal is started, and a communication is made to the management server via a mobile phone line near the lock position of the car to request unlocking. The management server authenticates the user and confirms the use reservation time, vehicle type, and the like, and then returns to the mobile terminal, commands the application, and unlocks it using the NFC (Near Field Communication) function of the mobile terminal.

  There is a normal car key in the unlocked car, so the user can start the engine. The user places the portable terminal on the installation base placed horizontally on the dashboard of the car, and connects and fixes the power supply. A mobile terminal may be installed in advance by a business operator for use in a vehicle.

  A portable application activates a voice microphone, an acceleration sensor, and a GPS position sensor, and measures necessary data during running at regular intervals and records them in a memory. The recorded data is transmitted to the management server at regular time intervals or at the end of use.

  The management server calculates the fuel consumption by analyzing the data sent from the vehicle, and bills the user as a usage charge along with the usage time at regular intervals such as the end of the month.

  The management server receives communication of usage requests from a mobile phone or a personal computer from the user, and records and manages the user ID, usage time, vehicle type, etc. in the scheduler. The management server analyzes the data sent from the car and notifies the user's mobile device, warns of a serious speed violation, or abnormal status when the return time is predicted from the location information. It manages the matters necessary for the operation of car sharing, such as recording the possibility of an accident when a negative acceleration is applied.

  In addition, users can take pictures of damages such as car scratches before and after using the mobile terminal, and send them to the management server through the application so that they can avoid liability for car damage and May be able to objectively determine when vehicle damage has occurred from these photographs.

  Such a management server for car sharing operation can be easily realized by always connecting an inexpensive personal computer to the operator's home or the like if the car sharing is a small membership system.

<Fifth Embodiment>
A fifth embodiment of the present invention will be described with reference to FIG.

<Configuration of mobile terminal>
As illustrated in FIG. 14, the mobile terminal 100 according to the present embodiment includes a sound collection unit 110, a storage unit 130, a control unit 140, an extraction unit 220, an estimation unit 230, and a conversion unit 240. ing.

  In the present embodiment, the functions of the mobile terminal and the management server in the first embodiment are integrated into the mobile terminal. Therefore, the function of each component is the same as that of the first embodiment, and detailed description thereof is omitted.

<Sixth Embodiment>
A sixth embodiment of the present invention will be described with reference to FIG.

<Configuration of mobile terminal>
As shown in FIG. 15, the mobile terminal 100 according to the present embodiment includes a sound collection unit 110, a storage unit 130, a control unit 140, an acceleration sensor 150, an extraction unit 220, an estimation unit 231, and a conversion unit. 241.

  In the present embodiment, the functions of the mobile terminal and the management server in the second embodiment are integrated into the mobile terminal. Therefore, the function of each component is the same as that of the second embodiment, and detailed description thereof is omitted.

<Seventh Embodiment>
The seventh embodiment of the present invention will be described with reference to FIG.

<Configuration of mobile terminal>
As illustrated in FIG. 17, the mobile terminal 100 according to the present embodiment includes a sound collection unit 110, a storage unit 130, a control unit 140, an acceleration sensor 150, an extraction unit 220, and a first estimation unit 250. The second estimation unit 260 and the conversion unit 242 are included.

  In the present embodiment, the functions of the mobile terminal and the management server in the third embodiment are integrated into the mobile terminal. Accordingly, the function of each component is the same as that of the third embodiment, and a detailed description thereof is omitted.

<Eighth Embodiment>
The eighth embodiment of the present invention will be described with reference to FIG.

<Configuration of mobile terminal>
As shown in FIG. 18, the mobile terminal 100 according to the present embodiment includes a sound collection unit 110, a storage unit 130, a control unit 140, an acceleration sensor 150, a position information acquisition unit 160, an extraction unit 220, The first estimation unit 250, the second estimation unit 260, the first conversion unit 270, the second conversion unit 280, the third conversion unit 290, and the fuel consumption calculation unit 300 are configured. ing.

  In the present embodiment, the functions of the mobile terminal and the management server in the fourth embodiment are integrated into the mobile terminal. Accordingly, the function of each component is the same as that of the fourth embodiment, and a detailed description thereof is omitted.

  The processing of the portable terminal and the management server is recorded on a recording medium readable by the computer system, and the program recorded on the recording medium is read by the portable terminal and the management server and executed, thereby executing the fuel consumption of the present invention. An estimation system and a car sharing system can be realized. The computer system here includes an OS and hardware such as peripheral devices.

  Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW (World Wide Web) system is used. The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.

  The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, what is called a difference file (difference program) may be sufficient.

<Additional notes>
[Additional Item 1]
It consists of a mobile terminal and a management server.
The mobile terminal is
A sound collecting means for collecting an in-vehicle acoustic signal;
Extraction means for performing an acoustic analysis based on the characteristics of the engine sound from the collected acoustic signal in the vehicle and extracting the engine speed;
Transmitting means for transmitting the extracted engine speed to the management server;
With
The management server is
Receiving means for receiving the extracted engine speed from the portable terminal;
An acoustic analysis of the received engine speed frequency range, frequency deviation, and sound pressure level to estimate the accelerator opening;
Conversion means for converting the fuel consumption by multiplying the extracted engine speed and the estimated accelerator opening in a time series and adding together and multiplying by a coefficient;
A fuel consumption estimation system comprising:
[Additional Item 2]
It consists of a mobile terminal and a management server.
The mobile terminal is
A sound collecting means for collecting an in-vehicle acoustic signal;
An acceleration sensor;
Extraction means for performing an acoustic analysis based on the characteristics of the engine sound from the collected acoustic signal in the vehicle and extracting the engine speed;
Transmitting means for transmitting the output value of the acceleration sensor and the extracted engine speed to the management server;
With
The management server is
Receiving means for receiving the output value of the acceleration sensor and the extracted engine speed from the portable terminal;
Estimating means for analyzing the received output value of the acceleration sensor and estimating the accelerator opening;
Conversion means for converting the fuel consumption by multiplying the received engine speed and the estimated accelerator opening in a time series and adding together, and multiplying by a coefficient;
A fuel consumption estimation system comprising:
[Additional Item 3]
It consists of a mobile terminal and a management server.
The mobile terminal is
A sound collecting means for collecting an in-vehicle acoustic signal;
An acceleration sensor;
Extraction means for performing an acoustic analysis based on the characteristics of the engine sound from the collected acoustic signal in the vehicle and extracting the engine speed;
Transmitting means for transmitting the output value of the acceleration sensor and the extracted engine speed to the management server;
With
The management server is
Receiving means for receiving the output value of the acceleration sensor and the extracted engine speed from the portable terminal;
A first estimating means for acoustically analyzing the received engine speed frequency range, frequency deviation, and sound pressure level to estimate an accelerator opening;
Second estimation means for analyzing the received output value of the acceleration sensor and estimating the accelerator opening;
The integration of the value obtained by weighting both the accelerator opening estimated by the first estimating means and the accelerator opening estimated by the second estimating means and the extracted engine speed in a time series. Conversion means to convert the fuel consumption by multiplying and multiplying by a coefficient,
A fuel consumption estimation system comprising:
[Additional Item 4]
It consists of a mobile terminal and a management server.
The mobile terminal is
A sound collecting means for collecting an in-vehicle acoustic signal;
An acceleration sensor;
Position information acquisition means for acquiring position information;
Extraction means for performing an acoustic analysis based on the characteristics of the engine sound from the collected acoustic signal in the vehicle and extracting the engine speed;
Transmitting means for transmitting the output value of the acceleration sensor, the acquired position information, and the extracted engine speed to the management server;
With
The management server is
Receiving means for receiving an output value of the acceleration sensor, the acquired position information, and the extracted engine speed from the portable terminal;
A first estimating means for acoustically analyzing the received engine speed frequency range, frequency deviation, and sound pressure level to estimate an accelerator opening;
Second estimation means for analyzing the received output value of the acceleration sensor and estimating the accelerator opening;
First conversion means for converting the fuel consumption amount by multiplying the accelerator opening degree estimated by the first estimation means and the extracted engine speed in a time series and adding together, and multiplying by a coefficient;
A second conversion means for converting the fuel consumption amount by multiplying the accelerator opening estimated by the second estimation means and the extracted engine speed in a time series and adding together, and multiplying by a coefficient;
The travel distance is measured from the received position information, and the altitude difference during the travel is acquired from the altitude map, and the fuel travels by summing the measured travel distance and the acquired altitude difference in time series. A third conversion means for converting the amount;
Fuel consumption calculation means for weighting the converted values in the first conversion means, the second conversion means, and the third conversion means to calculate fuel consumption;
A fuel consumption estimation system comprising:
[Additional Item 5]
A car sharing system characterized in that a billing process in car sharing is performed using the fuel consumption amount estimation system according to any one of items 1 to 4 above.
[Additional Item 6]
It consists of a mobile terminal and a management server.
The mobile terminal is
A sound collecting means for collecting an in-vehicle acoustic signal;
Extraction means for performing an acoustic analysis based on the characteristics of the engine sound from the collected acoustic signal in the vehicle and extracting the engine speed;
An acoustic analysis of the extracted engine speed frequency range, frequency deviation, and sound pressure level to estimate the accelerator opening;
Transmitting means for transmitting the extracted engine speed and the estimated accelerator opening to the management server;
With
The management server is
Receiving means for receiving the extracted engine speed and the estimated accelerator opening from the portable terminal;
Conversion means for converting the fuel consumption by multiplying the received engine speed and accelerator opening in a time series and adding together, and multiplying by a coefficient;
A fuel consumption estimation system comprising:
[Additional Item 7]
It consists of a mobile terminal and a management server.
The mobile terminal is
A sound collecting means for collecting an in-vehicle acoustic signal;
An acceleration sensor;
Extraction means for performing an acoustic analysis based on the characteristics of the engine sound from the collected acoustic signal in the vehicle and extracting the engine speed;
Estimating means for analyzing the output value of the acceleration sensor and estimating the accelerator opening;
Transmitting means for transmitting the extracted engine speed and the estimated accelerator opening to the management server;
With
The management server is
Receiving means for receiving the extracted engine speed and the estimated accelerator opening from the portable terminal;
Conversion means for converting the fuel consumption by multiplying the received engine speed and accelerator opening in a time series and adding together, and multiplying by a coefficient;
A fuel consumption estimation system comprising:
[Additional Item 8]
It consists of a mobile terminal and a management server.
The mobile terminal is
A sound collecting means for collecting an in-vehicle acoustic signal;
An acceleration sensor;
Extraction means for performing an acoustic analysis based on the characteristics of the engine sound from the collected acoustic signal in the vehicle and extracting the engine speed;
A first estimating means for acoustically analyzing the extracted engine speed frequency range, frequency shift and sound pressure level to estimate the accelerator opening;
Second estimating means for analyzing an output value of the acceleration sensor and estimating an accelerator opening;
Transmitting means for transmitting the extracted engine speed and the estimated two accelerator openings to the management server;
With
The management server is
Receiving means for receiving the extracted engine speed and the estimated two accelerator openings from the portable terminal;
The sum of the weighted value of both the accelerator opening estimated by the received first estimating means and the accelerator opening estimated by the second estimating means and the extracted engine speed is timed. Conversion means to convert the fuel consumption by going to the series, adding up, and multiplying by the coefficient,
A fuel consumption estimation system comprising:
[Additional Item 9]
It consists of a mobile terminal and a management server.
The mobile terminal is
A sound collecting means for collecting an in-vehicle acoustic signal;
An acceleration sensor;
Position information acquisition means for acquiring position information;
Extraction means for performing an acoustic analysis based on the characteristics of the engine sound from the collected acoustic signal in the vehicle and extracting the engine speed;
A first estimating means for acoustically analyzing the extracted engine speed frequency range, frequency shift and sound pressure level to estimate the accelerator opening;
Second estimating means for analyzing an output value of the acceleration sensor and estimating an accelerator opening;
Transmitting means for transmitting the extracted engine speed and the estimated two accelerator openings to the management server;
With
The management server is
Receiving means for receiving the acquired position information and the estimated two accelerator positions from the portable terminal;
First conversion means for converting the fuel consumption amount by multiplying the accelerator opening estimated by the received first estimation means and the extracted engine rotational speed in a time series and adding together; ,
Second conversion means for converting the fuel consumption amount by multiplying the accelerator opening estimated by the received second estimation means and the extracted engine rotational speed in a time series and adding together, and multiplying by a coefficient; ,
The travel distance is measured from the received position information, and the altitude difference during the travel is acquired from the altitude map, and the fuel travels by summing the measured travel distance and the acquired altitude difference in time series. A third conversion means for converting the amount;
Fuel consumption calculation means for weighting the converted values in the first conversion means, the second conversion means, and the third conversion means to calculate fuel consumption;
A fuel consumption estimation system comprising:
[Additional Item 10]
A car sharing system characterized in that a billing process in car sharing is performed using the fuel consumption estimation system according to any one of appendices 6 to 10.

  The embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the embodiments, and includes designs and the like that do not depart from the gist of the present invention. That is, the invention described in the appendix does not depart from the scope of the present invention.

100; mobile terminal 110; sound collection unit 120; transmission unit 121; transmission unit 122; transmission unit 130; storage unit 140; control unit 200; management server 210; reception unit 211; reception unit 212; ; Estimation unit 231; estimation unit 240; conversion unit 241; conversion unit 242; conversion unit 250; first estimation unit 260; second estimation unit 270; first conversion unit 280; 3 conversion unit 300; fuel consumption calculation unit

Claims (14)

It consists of a mobile terminal and a management server.
The mobile terminal is
A sound collecting means for collecting an in-vehicle acoustic signal;
Transmitting means for transmitting the collected acoustic signal to the management server;
With
The management server is
Receiving means for receiving the collected acoustic signal from the portable terminal;
Extraction means for performing an acoustic analysis based on the characteristics of the engine sound from the received in-vehicle acoustic signal and extracting the engine speed;
An acoustic analysis of the extracted engine speed frequency range, frequency deviation, and sound pressure level to estimate the accelerator opening;
Conversion means for converting the fuel consumption by multiplying the extracted engine speed and the estimated accelerator opening in a time series and adding together and multiplying by a coefficient;
A fuel consumption estimation system comprising: It consists of a mobile terminal and a management server.
The mobile terminal is
A sound collecting means for collecting an in-vehicle acoustic signal;
An acceleration sensor;
Transmitting means for transmitting the collected acoustic signal in the vehicle and the output value of the acceleration sensor to the management server;
With
The management server is
Receiving means for receiving the collected acoustic signal in the vehicle and the output value of the acceleration sensor from the portable terminal;
Extraction means for performing an acoustic analysis based on the characteristics of the engine sound from the received in-vehicle acoustic signal and extracting the engine speed;
Estimating means for analyzing the received output value of the acceleration sensor and estimating the accelerator opening;
Conversion means for converting the fuel consumption by multiplying the extracted engine speed and the estimated accelerator opening in a time series and adding together and multiplying by a coefficient;
A fuel consumption estimation system comprising: It consists of a mobile terminal and a management server.
The mobile terminal is
A sound collecting means for collecting an in-vehicle acoustic signal;
An acceleration sensor;
Transmitting means for transmitting the collected acoustic signal in the vehicle and the output value of the acceleration sensor to the management server;
With
The management server is
Receiving means for receiving the collected acoustic signal in the vehicle and the output value of the acceleration sensor from the portable terminal;
Extraction means for performing an acoustic analysis based on the characteristics of the engine sound from the received in-vehicle acoustic signal and extracting the engine speed;
A first estimating means for acoustically analyzing the extracted engine speed frequency range, frequency shift and sound pressure level to estimate the accelerator opening;
Second estimation means for analyzing the received output value of the acceleration sensor and estimating the accelerator opening;
The integration of the value obtained by weighting both the accelerator opening estimated by the first estimating means and the accelerator opening estimated by the second estimating means and the extracted engine speed in a time series. Conversion means to convert the fuel consumption by multiplying and multiplying by a coefficient,
A fuel consumption estimation system comprising: It consists of a mobile terminal and a management server.
The mobile terminal is
A sound collecting means for collecting an in-vehicle acoustic signal;
An acceleration sensor;
Position information acquisition means for acquiring position information;
Transmitting means for transmitting the collected acoustic signal in the vehicle, the output value of the acceleration sensor, and the acquired position information to the management server;
With
The management server is
Receiving means for receiving the collected acoustic signal in the vehicle, the output value of the acceleration sensor, and the acquired position information from the portable terminal;
Extraction means for performing an acoustic analysis based on the characteristics of the engine sound from the received in-vehicle acoustic signal and extracting the engine speed;
A first estimating means for acoustically analyzing the extracted engine speed frequency range, frequency shift and sound pressure level to estimate the accelerator opening;
Second estimation means for analyzing the received output value of the acceleration sensor and estimating the accelerator opening;
First conversion means for converting the fuel consumption amount by multiplying the accelerator opening degree estimated by the first estimation means and the extracted engine speed in a time series and adding together, and multiplying by a coefficient;
A second conversion means for converting the fuel consumption amount by multiplying the accelerator opening estimated by the second estimation means and the extracted engine speed in a time series and adding together, and multiplying by a coefficient;
The travel distance is measured from the received position information, and the altitude difference during the travel is acquired from the altitude map, and the fuel travels by summing the measured travel distance and the acquired altitude difference in time series. A third conversion means for converting the amount;
Fuel consumption calculation means for weighting the converted values in the first conversion means, the second conversion means, and the third conversion means to calculate fuel consumption;
A fuel consumption estimation system comprising:   5. A car sharing system using the fuel consumption estimation system according to claim 1 to perform a billing process in car sharing. A sound collecting means for collecting an in-vehicle acoustic signal;
Extraction means for performing an acoustic analysis based on the characteristics of the engine sound from the collected acoustic signal in the vehicle and extracting the engine speed;
An acoustic analysis of the extracted engine speed frequency range, frequency deviation, and sound pressure level to estimate the accelerator opening;
Conversion means for converting the fuel consumption by multiplying the extracted engine speed and the estimated accelerator opening in a time series and adding together and multiplying by a coefficient;
A portable terminal characterized by comprising: A sound collecting means for collecting an in-vehicle acoustic signal;
An acceleration sensor;
Extraction means for performing an acoustic analysis based on the characteristics of the engine sound from the collected acoustic signal in the vehicle and extracting the engine speed;
Estimating means for analyzing the output value of the acceleration sensor and estimating the accelerator opening;
Conversion means for converting the fuel consumption by multiplying the extracted engine speed and the estimated accelerator opening in a time series and adding together and multiplying by a coefficient;
A portable terminal characterized by comprising: A sound collecting means for collecting an in-vehicle acoustic signal;
An acceleration sensor;
Extraction means for performing an acoustic analysis based on the characteristics of the engine sound from the collected acoustic signal in the vehicle and extracting the engine speed;
A first estimating means for acoustically analyzing the extracted engine speed frequency range, frequency shift and sound pressure level to estimate the accelerator opening;
Second estimation means for analyzing the received output value of the acceleration sensor and estimating the accelerator opening;
The integration of the value obtained by weighting both the accelerator opening estimated by the first estimating means and the accelerator opening estimated by the second estimating means and the extracted engine speed in a time series. Conversion means to convert the fuel consumption by multiplying and multiplying by a coefficient,
A portable terminal characterized by comprising: A sound collecting means for collecting an in-vehicle acoustic signal;
An acceleration sensor;
Position information acquisition means for acquiring position information;
Extraction means for performing an acoustic analysis based on the characteristics of the engine sound from the collected acoustic signal in the vehicle and extracting the engine speed;
A first estimating means for acoustically analyzing the extracted engine speed frequency range, frequency shift and sound pressure level to estimate the accelerator opening;
Second estimation means for analyzing the received output value of the acceleration sensor and estimating the accelerator opening;
First conversion means for converting the fuel consumption amount by multiplying the accelerator opening degree estimated by the first estimation means and the extracted engine speed in a time series and adding together, and multiplying by a coefficient;
A second conversion means for converting the fuel consumption amount by multiplying the accelerator opening estimated by the second estimation means and the extracted engine speed in a time series and adding together, and multiplying by a coefficient;
The travel distance is measured from the received position information, and the altitude difference during the travel is acquired from the altitude map, and the fuel travels by summing the measured travel distance and the acquired altitude difference in time series. A third conversion means for converting the amount;
Fuel consumption calculation means for weighting the converted values in the first conversion means, the second conversion means, and the third conversion means to calculate fuel consumption;
A portable terminal characterized by comprising:   10. A car sharing system that performs a billing process in car sharing using the portable terminal according to claim 6. A fuel consumption estimation method in a fuel consumption estimation system comprising a portable terminal comprising a sound collection means and a transmission means, and a management server comprising a reception means, an extraction means, an estimation means, and a conversion means,
A first step in which the sound collecting means collects an acoustic signal in the vehicle;
A second step in which the transmitting means transmits the collected acoustic signal to the management server;
A third step in which the receiving means receives the collected acoustic signal in the vehicle;
A fourth step in which the extraction means performs an acoustic analysis based on the characteristics of the engine sound from the received in-vehicle acoustic signal and extracts the engine speed;
A fifth step in which the estimating means acoustically analyzes the extracted frequency range, frequency shift and sound pressure level of the engine speed to estimate the accelerator opening;
A sixth step of converting the fuel consumption by multiplying the coefficient by multiplying the extracted engine speed and the estimated accelerator opening in a time series and adding together, the conversion means;
A fuel consumption estimation method comprising: A fuel consumption estimation method in a portable terminal comprising a sound collection means, a transmission means, a reception means, an extraction means, an estimation means, and a conversion means,
A first step in which the sound collecting means collects an acoustic signal in the vehicle;
A second step in which the transmitting means transmits the collected acoustic signal to the management server;
A third step in which the receiving means receives the collected acoustic signal in the vehicle;
A fourth step in which the extraction means performs an acoustic analysis based on the characteristics of the engine sound from the received in-vehicle acoustic signal and extracts the engine speed;
A fifth step in which the estimating means acoustically analyzes the extracted frequency range, frequency shift and sound pressure level of the engine speed to estimate the accelerator opening;
A sixth step of converting the fuel consumption by multiplying the coefficient by multiplying the extracted engine speed and the estimated accelerator opening in a time series and adding together, the conversion means;
A fuel consumption estimation method comprising: The computer executes a fuel consumption estimation method in a fuel consumption estimation system comprising a portable terminal having sound collection means and transmission means, and a management server having reception means, extraction means, estimation means, and conversion means. There is a program to let
A first step in which the sound collecting means collects an acoustic signal in the vehicle;
A second step in which the transmitting means transmits the collected acoustic signal to the management server;
A third step in which the receiving means receives the collected acoustic signal in the vehicle;
A fourth step in which the extraction means performs an acoustic analysis based on the characteristics of the engine sound from the received in-vehicle acoustic signal and extracts the engine speed;
A fifth step in which the estimating means acoustically analyzes the extracted frequency range, frequency shift and sound pressure level of the engine speed to estimate the accelerator opening;
A sixth step of converting the fuel consumption by multiplying the coefficient by multiplying the extracted engine speed and the estimated accelerator opening in a time series and adding together, the conversion means;
A program that causes a computer to execute. A program for causing a computer to execute a fuel consumption estimation method in a portable terminal provided with sound collection means, transmission means, reception means, extraction means, estimation means, and conversion means,
A first step in which the sound collecting means collects an acoustic signal in the vehicle;
A second step in which the transmitting means transmits the collected acoustic signal to the management server;
A third step in which the receiving means receives the collected acoustic signal in the vehicle;
A fourth step in which the extraction means performs an acoustic analysis based on the characteristics of the engine sound from the received in-vehicle acoustic signal and extracts the engine speed;
A fifth step in which the estimating means acoustically analyzes the extracted frequency range, frequency shift and sound pressure level of the engine speed to estimate the accelerator opening;
A sixth step of converting the fuel consumption by multiplying the coefficient by multiplying the extracted engine speed and the estimated accelerator opening in a time series and adding together, the conversion means;
A program that causes a computer to execute.