JP6678462B2 - Fuel consumption estimation device, fuel consumption estimation method and program - Google Patents

Description

  The present invention relates to a fuel consumption estimation device, a fuel consumption estimation method, and a program.

  2. Description of the Related Art A fuel consumption calculating device that calculates the amount of fuel consumed by a dryer has been proposed (see Patent Document 1). The fuel consumption calculator calculates the amount of fuel consumed by the dryer based on a control signal of an electromagnetic pump that supplies the fuel stored in the fuel tank to the dryer via a supply pipe. Specifically, the fuel consumption calculator calculates the fuel consumed by the dryer based on the correlation between the frequency and the duty ratio of the pulse signal, which is a control signal of the electromagnetic pump, and the fuel consumption of the dryer. Calculate the amount. The frequency and duty ratio of this pulse signal determine the rotation speed of the electromagnetic pump.

JP-A-57-207727

  However, the user is required to have knowledge about the control of the electromagnetic pump in order to grasp the correlation between the fuel consumption in the dryer and the frequency or duty ratio of the pulse signal. Therefore, it may be difficult for a user who does not have knowledge about the control of the electromagnetic pump to estimate the fuel consumption by the fuel consumption calculating device described in Patent Document 1.

  The present invention has been made in view of the above circumstances, and has as its object to provide a fuel consumption estimation device, a fuel consumption estimation method, and a program that can easily estimate a fuel amount.

In order to achieve the above object, a fuel consumption estimation device according to the present invention includes:
A correlation information storage unit that stores correlation information indicating a correlation between a physical quantity indicating an output of the generator and a fuel consumption amount consumed per unit time by the generator,
A physical quantity acquisition unit that acquires a physical quantity indicating the output of the generator,
With reference to the correlation information, a consumption calculation unit that calculates the fuel consumption per unit time from the physical quantity acquired by the physical quantity acquisition unit,
A cumulative consumption calculator that calculates the cumulative fuel consumption of the generator during a target period for which the fuel consumption is estimated, based on the fuel consumption per unit time calculated by the consumption calculator. When,
The cumulative fuel calculated by the cumulative consumption calculator from the available fuel amount at start indicating the amount of fuel usable by the generator among the fuel stored in the storage tank at the start of use of the generator. The available fuel amount obtained by subtracting the consumption amount, and the fuel consumption amount per unit time in the past, and an operable time calculation unit that calculates an operable time during which the generator can be operated,
E Bei and a fuel consumption history storage unit that stores a history of fuel consumption per the previous unit time,
The fuel consumption history storage unit stores the fuel consumption per unit time in the past classified by season,
The operable time calculation unit calculates, from the fuel consumption history storage unit, a fuel consumption per unit time in the past in the same season as the season to which the cumulative consumption calculation unit calculates the cumulative fuel consumption. Obtain and calculate the average fuel consumption which is the average of the obtained fuel consumption per unit time in the past, and divide the usable fuel amount by the average fuel consumption to obtain the operable time. Is calculated .

  According to the present invention, the consumption calculator calculates the fuel consumption per unit time in the generator from the physical quantity indicating the output of the generator, and the cumulative consumption calculator calculates the fuel consumption based on the fuel consumption per unit time. Then, the cumulative fuel consumption of the generator during the target period for which the fuel consumption is to be estimated is calculated. As a result, the fuel consumption can be easily estimated even if the user has no knowledge of the control of the generator.

It is a figure showing an example of use of a fuel consumption estimating device concerning an embodiment of the invention. 1 is a block diagram illustrating a configuration of a fuel consumption estimation device according to an embodiment. FIG. 4 is a diagram showing a correlation between fuel consumption per unit time and generated power. It is a figure showing the contents of fuel consumption data memorized by fuel consumption history storage concerning an embodiment. FIG. 5 is a diagram showing an example of a screen displayed on the display unit according to the embodiment. 5 is a flowchart illustrating a flow of a fuel consumption / operable time estimation process executed by the fuel consumption estimation device according to the embodiment. It is a figure for explaining operation of a fuel consumption estimating device concerning an embodiment. It is a figure showing the contents which the fuel consumption history storage concerning a modification memorizes. 9 is a flowchart illustrating a flow of a fuel consumption / operable time estimation process executed by a fuel consumption estimation device according to a modification. It is a figure showing the contents of the unusable fuel amount table concerning a modification.

  Hereinafter, an embodiment of a fuel consumption estimation device according to the present invention will be described in detail with reference to the drawings.

  The fuel consumption estimation device according to the present embodiment calculates the fuel consumption of the emergency generator. As shown in FIG. 1, the emergency generator 1 is a generator equipped with a so-called diesel engine, generates electricity using light oil stored in an underground tank 2 buried in the underground EA as fuel, and outputs the fuel to a load 3. Supply power. The generator 1 receives fuel supply from the underground tank 2 through the supply pipe SP, and supplies power to the load 3 through the power line PL. A power measuring device 4 that measures the instantaneous power generated by the generator 1 is inserted into the power line PL. The fuel consumption estimation device 5 is communicably connected to the power meter 4.

  As shown in FIG. 2, the fuel consumption estimation device 5 includes a CPU (Central Processing Unit) 51, a main storage unit 52, an auxiliary storage unit 53, a display unit 54, an input unit 55, a communication unit 56, and a bus that connects each unit. 59. The main storage unit 52 is configured by a volatile memory such as a RAM (Random Access Memory). The main storage unit 52 is used by the CPU 51 as a work area. The display unit 54 displays data input from the CPU 51. The input unit 55 includes various input keys and receives an operation by a user. The input unit 55 outputs information on the received operation to the CPU 51. The communication unit 56 transmits and receives data to and from the power meter 4. From the CPU 51, to the communication unit 56, a generated power measurement value acquisition request for instructing the power measuring device 4 to transmit the measured generated power value to the fuel consumption estimation device 5 is input.

  The auxiliary storage unit 53 includes a nonvolatile memory such as a magnetic disk and a semiconductor memory. The auxiliary storage unit 53 includes a correlation information storage unit 531, a parameter storage unit 535, a fuel consumption history storage unit 532, an initial fuel amount information storage unit 533, and a display information storage unit 534. The auxiliary storage unit 53 also stores various programs executed by the CPU 51.

  The correlation information storage unit 531 stores correlation information indicating a correlation between the power generated by the generator 1 and the amount of fuel consumed per unit time. The length of the unit time can be set to any length between several minutes and several hours. Hereinafter, description will be made assuming that the unit time is appropriately set to one hour. The fuel consumption per unit time corresponds to the fuel consumption consumed when the generator 1 operates for a unit time while maintaining the generated power constant. The correlation between the generated power and the fuel consumption per unit time is a relationship represented by a linear function, as shown in FIG. The correlation information is constituted by a relational expression or a correlation table representing the straight line.

  The parameter storage unit 535 stores information indicating the no-load fuel consumption and the rated load fuel consumption. The information indicating the no-load fuel consumption and the rated load fuel consumption is a parameter that determines the correlation between the power generated by the generator 1 and the fuel consumption consumed per unit time. The no-load fuel consumption is a fuel consumption per unit time when the generator 1 is operated without connecting the load 3 to the generator 1. The rated load fuel consumption is a fuel consumption per unit time when the generator 1 is operated with a rated load having a resistance value of a preset magnitude connected to the generator 1. These fuel consumptions are measured in advance by the user. These fuel consumptions are stored in the parameter storage unit 535 when the user operates the input unit 55.

  Returning to FIG. 2, the fuel consumption history storage unit 532 stores the history of the fuel consumption per unit time in the past. As shown in FIG. 4, for example, the fuel consumption history storage unit 532 stores the fuel consumption per unit time (one hour) in association with the date and time when the fuel consumption was calculated.

  Returning to FIG. 2, the initial fuel amount information storage unit 533 stores initial storage amount information indicating the amount of fuel stored in the underground tank 2 at the start of use of the generator 1 and an unusable area in the underground tank 2. Unusable fuel amount information indicating the unusable fuel amount indicating the DS capacity is stored. The unusable area DS corresponds to a so-called dead space area interposed between the bottom surface of the underground tank 2 and the tip of the supply pipe SP in FIG. The fuel stored in the unusable area DS cannot be supplied to the generator 1 via the supply pipe SP. Returning to FIG. 2, the display information storage unit 534 stores various information to be displayed on the display unit 54.

  The CPU 51 reads out the program stored in the auxiliary storage unit 53 into the main storage unit 52 and executes the program, so that the calculation information management unit 511, the power acquisition unit (physical quantity acquisition unit) 512, the consumption calculation unit 513, the accumulated consumption calculation It functions as a unit 514, an initial fuel information management unit 515, an operable time calculation unit 516, a timer unit 517, and a display control unit 518.

  The calculation information management unit 511 manages information necessary for calculating the fuel consumption per unit time in the generator 1 from the measured value of the generated power. The calculation information management unit 511 presents an input screen of the no-load fuel consumption and the rated load fuel consumption to the user via the display unit 54. Then, when the user operates the input unit 55 to input the no-load fuel consumption and the rated load fuel consumption, the calculation information management unit 511 causes the parameter storage unit 535 to store information indicating them. The calculation information management unit 511 causes the parameter storage unit 535 to store the no-load fuel consumption and the rated load fuel consumption in association with the no-load generated power and the rated load generated power. The no-load generated power is equivalent to the instantaneous generated power when no load is connected to the generator 1, and the rated load generated power is the instantaneous generated power when the rated load is connected to the generator 1. Is equivalent to The rated load is a load having a size corresponding to the maximum value of the size of the load 3 that the generator 1 can tolerate. The no-load generated power and no-load fuel consumption and the rated load generated power and the rated load fuel consumption are measured by the manufacturer or user of the generator 1 when the generator 1 is delivered to the user. The calculation information management unit 511 calculates the fuel consumption per unit time from the no-load fuel consumption, the rated load fuel consumption, the no-load generated power, and the rated load generated power stored in the parameter storage unit 535. Correlation information indicating the correlation between the amount and the generated power is generated and stored in the correlation information storage unit 531.

  The power acquisition unit 512 acquires a measured value of the power generated by the generator 1 from the power meter 4 via the communication unit 56 at unit time intervals.

  The consumption calculation unit 513 calculates the fuel consumption per unit time from the measured value of the generated power acquired by the power acquisition unit 512 with reference to the correlation information stored in the correlation information storage unit 531. More specifically, the consumption calculation unit 513 calculates the fuel consumption consumed by the generator 1 within a unit time including the time when the measured value is acquired from the measured value of the generated power acquired by the power acquisition unit 512. I do. The consumption calculation unit 513 stores the calculated fuel consumption per unit time in the fuel consumption history storage unit 532 in association with the date and time when the power acquisition unit 512 acquires the measured value of the generated power.

  The cumulative consumption calculation unit 514 calculates the total sum (cumulative fuel consumption) of the fuel consumption per unit time at each point in the target period for which the fuel consumption is estimated, calculated by the consumption calculation unit 513. calculate. The target period can be set to a period from the start of use of the generator 1 to any point in time when the cumulative fuel consumption is calculated.

  The initial fuel information management unit 515 includes information indicating the initial fuel storage amount input to the fuel consumption estimation device 5 by the user via the input unit 55 and the unusable fuel amount corresponding to the capacity of the unusable area DS of the underground tank 2. Is stored in the initial fuel amount information storage unit 533. The initial fuel storage amount corresponds to the maximum filling amount of the underground tank 2. The maximum filling amount and the unusable fuel amount of the underground tank 2 differ depending on the specification of the underground tank 2. The user fills the underground tank 2 with fuel corresponding to the maximum filling amount in advance before operating the generator 1, and then inputs the initial fuel storage amount and the unusable fuel amount to the fuel consumption estimation device 5.

  The operable time calculation unit 516 first obtains the past fuel consumption per unit time from the fuel consumption history storage unit 532, and calculates the average fuel consumption per unit time in the past. Calculate the average value. Then, the operable time calculation unit 516 accumulates the amount of fuel that can be used by the generator 1 from the amount of fuel that can be used by the generator 1 among the fuel stored in the underground tank 2 when the use of the generator 1 is started. The operable time during which the generator 1 can be operated is calculated by dividing the usable fuel amount obtained by subtracting the fuel consumption amount by the average fuel consumption amount. The start of use of the generator 1 corresponds to the time when the operation of the generator 1 is started. The operable time calculation unit 516 causes the display information storage unit 534 to store information indicating the calculated usable fuel amount and information indicating the operable time.

  The timer 517 uses an internal clock (not shown) to count the time elapsed since the start of the fuel consumption calculation process described later.

  The display control unit 518 includes information indicating the no-load fuel consumption and the rated load fuel consumption stored in the parameter storage unit 535, the generated power stored in the fuel consumption history storage unit 532, and the fuel consumption per unit time. Information indicating the amount is displayed on the display unit 54. The display control unit 518 displays the information indicating the unusable fuel amount stored in the initial fuel amount information storage unit 533 and the information indicating the usable fuel amount and the operable time stored in the display information storage unit 534. It is displayed on the unit 54. As shown in FIG. 5, the display unit 54 displays the generated power F1, the fuel consumption F2 per unit time, the no-load fuel consumption F3, the rated load fuel consumption F4, the usable fuel amount F5, and the unusable fuel consumption. The fuel amount F6 and the operable time F7 are displayed.

  Next, a fuel consumption / operable time estimation process executed by the fuel consumption estimation device 5 according to the present embodiment will be described with reference to FIGS. The fuel consumption estimating device 5 is started when the user performs an operation for starting the fuel consumption estimating device on the input unit 55.

  First, as shown in FIG. 6, the timing unit 517 determines whether or not it is time for the power acquisition unit 512 to acquire the measured value of the generated power measured by the power measuring device 4 (step S1). When it is not time to acquire the measurement value of the generated power (step S1: No), the process of step S1 is repeatedly executed. The time interval for acquiring the measured value of the generated power is equal to the unit time.

  If it is determined that the time to acquire the measured value of the generated power has come (Step S1: Yes), the power acquisition unit 512 issues a request to the power measuring device 4 via the communication unit 56 to acquire the measured value of the generated power. A transmission power measurement value is acquired by transmission (step S2). Upon receiving the generated power measurement value acquisition request from the fuel consumption estimation device 5, the power measuring device 4 transmits to the fuel consumption estimation device 5 the generated power information indicating the measured value of the generated power at that time.

Next, the consumption calculating unit 513 refers to the correlation information stored in the correlation information storage unit 531 to calculate the fuel consumption per unit time from the measured value of the generated power acquired by the power acquiring unit 512, and It is stored in the consumption history storage unit 532 (step S3). The consumption calculation unit 513 calculates the unit time ΔT immediately before the time T [i] from the measurement value of the generated power acquired at the time T [i] in FIG. 7, that is, the time T [i−1] to the time T [i−1]. The amount of fuel consumed by the generator 1 up to [i] is calculated. Here, the index i corresponds to a time corresponding to the start time or the end time of each period when the target period for which the fuel consumption is to be estimated is equally divided by J-1 (J is a positive integer). The consumption calculator 513 calculates the fuel consumption per unit time with reference to the correlation information represented by the following equation (1).
E [i]
= E (R (0%)) + {(P (T [i])-P (R (0%))) / (P (R (100%))-P (R (0%))}} × (E (R (100%)) − E (R (0%))) Formula (1)
Here, E [i] indicates the fuel consumption per unit time from time T [i-1] to time T [i], and E (R (*%)) indicates that the load factor of the load 3 is *. % Indicates the fuel consumption per unit time. P (T [i]) indicates the generated power at time T [i], and P (R (*%)) indicates the generated power when the load factor of the load 3 is *%.

Returning to FIG. 6, subsequently, the cumulative consumption calculating unit 514 reads from the fuel consumption history storage unit 532 the unit time of the generator 1 at each point in the target period for which the fuel consumption is to be estimated. And the sum of the fuel consumption of the generator 1 per unit time at each point in the target period is calculated as the accumulated fuel consumption (step S4). As shown in FIG. 7, when the target period ΔTAI is a period from the use start time T [0] to the time T [j] of the generator 1, as shown in FIG. The cumulative fuel consumption E (cumulative) from T [0] to time T [j] is calculated using the relational expression of the following expression (2).
E (accumulation) = ΣE ([i]) (i = 1, 2,..., J) Expression (2)

  Returning to FIG. 6, the operable time calculation unit 516 then acquires the fuel consumption per unit time of the generator 1 at each past time from the fuel consumption history storage unit 532, and acquires the acquired past unit time. The average value of the fuel consumption per unit is calculated (step S5).

  Next, the operable time calculation unit 516 determines the amount of fuel indicated by the unusable fuel amount information stored in the initial fuel amount information storage unit 533 from the amount of fuel indicated by the initial storage amount information stored in the initial fuel amount information storage unit 533. The starting available fuel amount is calculated by subtracting the unusable fuel amount (step S6).

  Subsequently, the operable time calculation unit 516 calculates the available fuel amount obtained by subtracting the accumulated fuel consumption amount from the starting available fuel amount, as an average value of the past fuel consumption amount per unit time in the generator 1. The operable time is calculated by dividing by (step S7). At this time, the drivable time calculation unit 516 causes the display information storage unit 534 to store information indicating the calculated usable fuel amount and information indicating the drivable time. The display control unit 518 causes the display unit 54 to display the usable fuel amount F5 and the operable time F7 stored in the display information storage unit 534, as shown in FIG. By confirming the operable time F7 displayed on the display unit 54, the user can make a schedule for arranging a tank truck to replenish the fuel in the underground tank 2. After that, the process of step S1 is executed again.

  Then, by repeating the series of processes from step S1 to step S7, the fuel consumption amount, the usable fuel amount, and the operable time per unit time are calculated at unit time ΔT intervals. Thereby, the generated power F1, the fuel consumption per unit time F2, the usable fuel amount F5, and the operable time F7 of the display unit 54 shown in FIG. 5 are updated at unit time ΔT intervals.

  As described above, according to the fuel consumption estimation device 5 according to the present embodiment, the consumption calculator 513 calculates the fuel consumption per unit time in the generator 1 from the power generated by the generator 1. Further, the cumulative consumption calculator 514 calculates the cumulative fuel consumption of the generator 1 during the target period for which the fuel consumption is to be estimated, based on the fuel consumption per unit time. Thus, the user can easily estimate the fuel consumption without knowledge of the control of the generator.

  By the way, in an emergency power generator that generates electric power by using the fuel stored in the storage tank, it is required to monitor the amount of fuel stored in the storage tank. As a method of monitoring the amount of fuel stored in the storage tank, a method using an oil level sensor can be considered. However, since the oil level sensor is installed in the storage tank, it is necessary to remove the oil level sensor from the storage tank each time maintenance is performed. In particular, when the storage tank is buried underground, the maintenance of the storage tank is very troublesome, and the burden on the user for monitoring the fuel amount increases.

  On the other hand, according to the fuel consumption estimation device according to the present embodiment, the user can estimate the fuel consumption without using the oil level sensor, and the fuel consumption is stored in the storage tank from the estimated combustion consumption. The amount of fuel can be estimated. Therefore, the burden of maintenance can be reduced as compared with a configuration in which the amount of stored fuel is calculated using a device that measures the amount of stored fuel by an oil level sensor installed in a storage tank that stores fuel. . Therefore, the burden on the user of monitoring the fuel amount is reduced.

  In addition, the generator 1 generally measures the fuel consumption per unit time using a fuel flow meter at the time of inspection before delivery to a user or at the time of trial operation after delivery to the user. However, since this fuel flow meter is relatively expensive, if it is incorporated into the fuel consumption estimation device 5, the cost of the fuel consumption estimation device 5 will increase. On the other hand, the fuel consumption estimation device 5 according to the present embodiment calculates the fuel consumption without using a relatively expensive measuring instrument such as a fuel flow meter. Cost can be reduced.

  Further, the oil level sensor and the fuel flow meter are installed in the underground tank 2 and used in contact with the fuel. Therefore, in the underground tank 2, it is necessary to separately provide a pipe for attaching an oil level sensor or a fuel flow meter in addition to the supply pipe SP for supplying fuel, and the sealing performance of the underground tank 2 is impaired. I will be. On the other hand, the fuel consumption estimation device 5 according to the present embodiment calculates the fuel consumption without using an oil level sensor or a fuel flow meter. The reliability of the underground tank 2 can be maintained.

  Further, in the fuel consumption estimation device 5 according to the present embodiment, by appropriately setting the correlation information according to the type of the generator 1 used and the state of the load 3, the fuel consumption estimation device 5 can be used for all types of generators 1. Accumulated fuel consumption can be accurately calculated. That is, there is an advantage that the fuel consumption estimation device 5 is versatile. In addition, the fuel consumption estimation device 5 updates the correlation information periodically (for example, every five years or every ten years), so that the generator 3 is configured in consideration of the influence of the deterioration of the electric equipment constituting the load 3. Since it is possible to calculate the accumulated fuel consumption in step 1, there is an advantage that the accuracy of the calculated accumulated fuel consumption is high.

  Further, the correlation information according to the present embodiment includes the measured value of the generated power of the generator 1 in a state where the load 3 is not connected to the generator 1 and a state where the rated load is connected to the generator 1 and It is set based on the measured value of the fuel consumption per unit time. As a result, the correlation information indicating the correlation between the power generated by the generator 1 and the fuel consumption per unit time reflects the actual characteristics of the generator 1, and the correlation information per unit time of the generator 1 The calculation accuracy of the fuel consumption is increased.

  Further, the correlation information according to the present embodiment is a correlation between the instantaneous power generation of the generator 1 and the fuel consumption consumed when the generator 1 operates for a unit time while maintaining the power generation constant. Shows the relationship. Then, the power acquisition unit 512 acquires the generated power at unit time intervals within the target period. Further, the consumption calculator 513 calculates the fuel consumption consumed by the generator 1 within a unit time including the time when the power acquisition unit 512 acquires the generated power, from the generated power acquired by the power acquisition unit 512. Thus, since the power measuring device 4 only needs to intermittently measure the generated power within the target period, the operation frequency of the power measuring device 4 is reduced, and the power consumption of the power measuring device 4 is reduced.

  In addition, the operable time calculation unit 516 according to the present embodiment obtains the accumulated fuel consumption calculated by the accumulated consumption calculation unit 514 from the available fuel amount at the start of the fuel stored in the underground tank 2. The operable time is calculated from the usable fuel amount used and the fuel consumption per unit time in the past. Thereby, the operable time is calculated in consideration of the past performance of the fuel consumption per unit time in the generator 1, and the accuracy of the operable time is improved.

  Further, the fuel consumption estimation device 5 according to the present embodiment includes a fuel consumption history storage unit 532 that stores a history of fuel consumption per unit time in the past. Then, the drivable time calculation unit 516 calculates a fuel consumption average value which is an average value of fuel consumption per unit time in the past obtained from the fuel consumption history storage unit 532, and calculates an available fuel amount as a fuel consumption amount. The operable time is calculated by dividing by the average value. As a result, the operable time is calculated based on the average value of the past results of the fuel consumption per unit time in the generator 1, and the error between the calculated operable time and the actual operable time is calculated. Extremely large size can be prevented.

(Modification)
The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments. As shown in FIG. 8, the fuel consumption history storage unit 532 may store the fuel consumption per unit time at each time point in the past, classified by season. Then, the drivable time calculation unit 516 acquires the fuel consumption per unit time in the same season as the season to which the power acquisition unit 512 acquired the power generation from the fuel consumption history storage unit 532. You may.

  The fuel consumption estimating device executed by the fuel consumption estimating device 5 according to this modification will be described with reference to FIG. After the processes of steps S201 to S203 are performed, the consumption calculation unit 513 specifies the season to which the present time belongs, and stores the fuel consumption in the fuel consumption history storage unit 532 in association with the specified season. . Note that the processing contents from step S201 to step S203 are the same as the processing contents from step S1 to step S3 described in the embodiment.

  Next, the cumulative consumption calculation unit 514 calculates the cumulative fuel consumption from the start of use of the generator 1 to the current time (step S205). Here, even when the period from the start of use of the generator 1 to the present time spans different seasons, the cumulative consumption calculation unit 514 determines the total amount of the consumption from the start of the generator 1 to the present time. Calculate the accumulated fuel consumption in the period.

  Subsequently, the drivable time calculation unit 516 calculates an average value of fuel consumption per unit time for the season to which the present time belongs (step S206).

  Thereafter, the drivable time calculation unit 516 calculates the amount of usable fuel (step S207), and divides the difference between the amount of usable fuel and the accumulated fuel consumption by the calculated average value. , The operable time is calculated (step S208). After that, the process of step S201 is performed again. The processing in step S207 is the same as the processing in step S6 described in the first embodiment.

  When an air conditioner is connected as the load 3, the size of the load 3 greatly varies depending on the season. On the other hand, according to the present configuration, the operable time calculation unit 516 reads from the fuel consumption history storage unit 532 per unit time in the same season as the season to which the power acquisition unit 512 acquires the generated power. Get fuel consumption. Thereby, since the operable time is calculated in consideration of the influence of the season, there is an advantage that the calculated operable time is highly accurate.

  Further, the fuel consumption history storage unit 532 may store the fuel consumption per unit time at each time point in the past, categorized by the weather at the date and time when the fuel consumption was calculated. Then, the drivable time calculation unit 516 may calculate the drivable time by using the fuel consumption that differs for each weather as the fuel consumption per unit time. In this case, the fuel consumption estimation device 5 may be connected to an external network such as the Internet, acquire weather forecast information from the external network, and select the weather based on the acquired weather forecast information. .

  In the above-described embodiment, the consumption calculator 513 determines the correlation between the power generated by the generator 1 and the fuel consumption consumed when the generator 1 operates for a unit time while maintaining the generated power constant. The example in which the fuel consumption per unit time is calculated from the generated power with reference to the correlation information indicating the relationship has been described. However, the correlation information is not limited to this, and may indicate the correlation between the power generation amount per unit time and the fuel consumption amount per unit time. In this modification, a watt hour meter that measures the amount of power generated per unit time of the generator 1 is inserted in the power line PL instead of the power meter 4. The power acquisition unit 512 acquires a power generation amount at unit time intervals. The consumption calculator 513 calculates the amount of fuel consumed by the generator 1 within a unit time including the time when the power generation is acquired, from the power generation acquired by the power acquisition unit 512.

  According to this configuration, the fuel consumption of the generator is calculated with higher accuracy than the fuel consumption estimation device 5 according to the embodiment.

  In the fuel consumption estimation device 5 according to the above-described embodiment, the operable time calculation unit 516 divides the usable fuel amount by the average fuel consumption amount that is the average value of the past fuel consumption amounts per unit time. Thus, the example in which the operable time is calculated by the above operation has been described. However, the drivable time calculation unit 516 is not limited to the configuration using the average fuel consumption. The operable time calculation unit 516 may be configured to calculate the operable time by dividing the available fuel amount by the intermediate value, the maximum value, and the minimum value of the past fuel consumption per unit time.

  In the above-described embodiment, an example in which the user registers the unusable fuel amount of the underground tank 2 via the input unit 55 has been described. However, the unusable fuel amount is not limited to the one registered by the user. The fuel consumption estimation device 5 associates identification information for identifying the shape and size of the underground tank 2 with the unusable fuel amount indicating the capacity of the unusable area DS in the underground tank 2 as shown in FIG. A tank information storage unit (reservoir information storage unit: not shown) for storing the unusable fuel amount table may be provided. In this case, the fuel consumption estimating device 5 refers to the unusable fuel amount table stored in the tank information storage unit and specifies the unusable fuel amount corresponding to the identification information of the underground tank 2 specified by the user. A fuel amount specifying unit is provided. Here, the user specifies the identification information of the underground tank 2 via the input unit 55. The operable time calculation unit 516 can operate the fuel amount obtained by subtracting the unusable fuel amount specified by the unusable fuel amount specifying unit from the amount of fuel stored in the underground tank 2 as the starting usable fuel amount. Calculate the time.

  According to this configuration, the user only needs to know the identification information of the underground tank 2 and does not need to know the capacity of the unusable area DS of the underground tank 2, so that the burden on the user is reduced. There are advantages.

  In the fuel consumption estimation device 5 according to the above-described embodiment, the configuration in which the auxiliary storage unit 53 includes an available fuel amount storage unit (not shown) that stores the available fuel amount at each point in the target period. It may be. Further, the CPU 51 may function as an available fuel amount updating unit (not shown) for updating the available fuel amount when fuel is added to the underground tank 2 by the user. The usable fuel amount updating unit adds the usable fuel amount stored in the usable fuel amount storage unit before the fuel is added by the user to the amount of fuel added to the usable fuel amount. Update to the fuel amount obtained by adding the fuel amount.

  According to this configuration, there is an advantage that the operable time of the generator 1 is accurately calculated even when fuel is added to the underground tank 2 before the fuel in the underground tank 2 is depleted.

  In the above-described embodiment, an example has been described in which the target period for which the fuel consumption is estimated is set to a period from the start of use of the generator 1 to an arbitrary time point for calculating the cumulative fuel consumption. However, the present invention is not limited to this, and the target period may be set to a period from when the generator 1 starts to when the generator 1 stops. In this case, every time the generator 1 repeats starting and stopping, the fuel consumption estimating device 5 calculates the accumulated fuel consumption and the operable time of the generator 1 from the start to the stop of the generator 1. May be calculated and displayed on the display unit 54.

  In the above-described embodiment, an example has been described in which the display unit 54 includes a display. However, the present invention is not limited to this. The display unit 54 includes a mechanical indicator or a 7-segment display. Is also good.

  In the above-described embodiment, the measured values of the generated power and the fuel consumption per unit time when the load is not connected to the generator 1 and the generated power and the unit when the rated load is connected to the generator 1 The example in which the correlation information is determined from the measured value of the fuel consumption per hour has been described. However, the parameters used to determine the correlation information are not limited to these, and the measured values of the generated power and the fuel consumption per unit time in a state where any two types of loads having different sizes are connected to the generator 1 It may be.

  In the above-described embodiment, an example has been described in which the generator 1 is a generator equipped with a so-called diesel engine. However, the present invention is not limited to this, and the generator 1 is a generator equipped with a gas turbine engine or a gas engine. Is also good.

  Further, various functions of the fuel consumption estimation device 5 according to the present invention can be realized by using a normal computer system without using a dedicated system. For example, a program for executing the above operation is stored in a non-transitory recording medium (such as a CD-ROM) readable by a computer system and distributed to a computer connected to a network. By installing in the system, the fuel consumption estimation device 5 that executes the above-described processing may be configured.

  The method of providing the program to the computer is arbitrary. For example, the program may be uploaded to a bulletin board (BBS) on a communication line and distributed to a computer via the communication line. Then, the computer activates this program and executes it under the control of the OS in the same manner as other applications. Thereby, the computer functions as the fuel consumption estimation device 5 that executes the above-described processing.

  As described above, the embodiments and the modified examples (including those described in the description, hereinafter the same) of the present invention have been described, but the present invention is not limited to these. The present invention includes those in which the embodiments and the modified examples are appropriately combined, and those in which modifications are appropriately made.

  INDUSTRIAL APPLICATION This invention can be utilized suitably for an emergency power generator.

Reference Signs List 1 generator, 2 underground tank, 3 load, 4 power meter, 5 fuel consumption estimation device, 51 CPU, 52 main storage unit, 53 auxiliary storage unit, 54 display unit, 55 input unit, 56 communication unit, 59 bus 511 calculation information management unit, 512 power acquisition unit, 513 consumption amount calculation unit, 514 cumulative consumption amount calculation unit, 515 initial fuel information management unit, 516 operable time calculation unit, 517 clock unit, 518 display control unit, 531 correlation Information storage unit, 532 Fuel consumption history storage unit, 533 Initial fuel amount information storage unit, 534 Display information storage unit, 535 Parameter storage unit, DS unusable area, EA underground, PL power line, SP supply pipe

Claims (8)

A correlation information storage unit that stores correlation information indicating a correlation between a physical quantity indicating an output of the generator and a fuel consumption amount consumed per unit time by the generator,
A physical quantity acquisition unit that acquires a physical quantity indicating the output of the generator,
With reference to the correlation information, a consumption calculation unit that calculates the fuel consumption per unit time from the physical quantity acquired by the physical quantity acquisition unit,
A cumulative consumption calculator that calculates the cumulative fuel consumption of the generator during a target period for which the fuel consumption is estimated, based on the fuel consumption per unit time calculated by the consumption calculator. When,
The cumulative fuel calculated by the cumulative consumption calculator from the available fuel amount at start indicating the amount of fuel usable by the generator among the fuel stored in the storage tank at the start of use of the generator. The available fuel amount obtained by subtracting the consumption amount, and the fuel consumption amount per unit time in the past, and an operable time calculation unit that calculates an operable time during which the generator can be operated,
E Bei and a fuel consumption history storage unit that stores a history of fuel consumption per the previous unit time,
The fuel consumption history storage unit stores the fuel consumption per unit time in the past classified by season,
The operable time calculation unit calculates, from the fuel consumption history storage unit, a fuel consumption per unit time in the past in the same season as the season to which the cumulative consumption calculation unit calculates the cumulative fuel consumption. Obtain and calculate the average fuel consumption which is the average of the obtained fuel consumption per unit time in the past, and divide the usable fuel amount by the average fuel consumption to obtain the operable time. Calculate
Fuel consumption estimation apparatus. The correlation information indicates that the physical quantity indicating the output of the generator and the measured value of the fuel consumption per unit time are in a relationship represented by a linear function.
The fuel consumption estimation device according to claim 1. The physical quantity is generated power,
The correlation information indicates a correlation between the power generated by the generator and the fuel consumption per unit time,
The physical quantity acquisition unit acquires the generated power at the unit time interval,
The consumption calculation unit calculates the fuel consumption consumed by the generator within a unit time including the time when the generated power is acquired from the generated power acquired by the physical quantity acquisition unit with reference to the correlation information. And
The cumulative consumption calculation unit calculates a total sum of fuel consumption per unit time of the generator at each point in the target period,
The fuel consumption estimation device according to claim 1. The physical quantity is a power generation amount per unit time,
The correlation information indicates a correlation between a power generation amount per unit time of the generator and a fuel consumption amount per unit time,
The physical quantity acquisition unit acquires a power generation amount at the unit time interval,
The consumption amount calculation unit calculates the fuel consumption amount consumed by the generator within a unit time including a time point when the power generation amount is obtained, from the power generation amount obtained by the physical amount obtaining unit with reference to the correlation information. And
The cumulative consumption calculation unit calculates a total sum of fuel consumption per unit time of the generator at each point in the target period,
The fuel consumption estimation device according to claim 1. A storage tank information storage unit that stores an unusable fuel amount table that associates the identification information of the storage tank with the unusable fuel amount indicating the capacity of the unusable area in the storage tank,
An unusable fuel amount specifying unit that specifies the unusable fuel amount corresponding to the identification information specified by the user, with reference to the unusable fuel amount table stored in the storage tank information storage unit,
The operable time calculation unit uses the starting available fuel amount obtained by subtracting the unusable fuel amount identified by the unusable fuel amount identification unit from the amount of fuel stored in the storage tank, Calculating the operable time,
The fuel consumption estimation device according to any one of claims 1 to 4 . An available fuel amount storage unit that stores the available fuel amount,
When the fuel is added to the storage tank by the user, the usable fuel amount stored in the usable fuel amount storage unit before the fuel is added is changed to the amount of fuel added to the usable fuel amount. And an available fuel amount updating unit that updates the amount of fuel obtained by adding the additional amount of fuel.
Fuel consumption estimation apparatus according to any one of claims 1 to 5. Obtaining a physical quantity indicating the output of the generator;
By referring to correlation information indicating a correlation between the physical quantity indicating the output of the generator and the fuel consumption consumed by the generator per unit time, the fuel consumption per unit time is obtained from the obtained physical quantity. Calculating
Based on the calculated fuel consumption per unit time, calculating the cumulative fuel consumption by the generator during the target period for which the fuel consumption is estimated,
It is obtained by subtracting the cumulative fuel consumption calculated from the starting available fuel amount indicating the amount of fuel that can be used by the generator among the fuel stored in the storage tank at the start of use of the generator. Calculating the operable time during which the generator can be operated from the usable fuel amount and the past fuel consumption amount per unit time;
And storing the history of the fuel consumption per the previous unit time fuel consumption history storage unit, only including,
The fuel consumption history storage unit stores the fuel consumption per unit time in the past classified by season,
In the step of calculating the drivable time, from the fuel consumption history storage unit, the fuel consumption per unit time in the past in the same season as the season to which the cumulative fuel consumption belongs is obtained and obtained. Calculating a fuel consumption average value that is an average value of the fuel consumption amounts per unit time in the past, and calculating the operable time by dividing the usable fuel amount by the fuel consumption average value;
Fuel consumption estimation method. Computer
A physical quantity acquisition unit for acquiring a physical quantity indicating an output of the generator,
The physical quantity indicating the output of the generator and the fuel consumption consumed per unit time by the generator are referred to correlation information indicating a correlation between the physical quantity acquired by the physical quantity acquisition unit. A consumption calculator for calculating the fuel consumption of the
A cumulative consumption calculator that calculates the cumulative fuel consumption of the generator during a target period for which the fuel consumption is estimated, based on the fuel consumption per unit time calculated by the consumption calculator. ,
The cumulative fuel calculated by the cumulative consumption calculator from the available fuel amount at start indicating the amount of fuel usable by the generator among the fuel stored in the storage tank at the start of use of the generator. An available fuel amount obtained by subtracting the consumption amount, and a fuel consumption amount per unit time in the past, and an operable time calculation unit that calculates an operable time during which the generator can be operated,
A program for functioning as a fuel consumption history storage unit that stores a history of fuel consumption per unit time in the past ,
The fuel consumption history storage unit stores the fuel consumption per unit time in the past classified by season,
The operable time calculation unit calculates, from the fuel consumption history storage unit, a fuel consumption per unit time in the past in the same season as the season to which the cumulative consumption calculation unit calculates the cumulative fuel consumption. Obtain and calculate the average fuel consumption which is the average of the obtained fuel consumption per unit time in the past, and divide the usable fuel amount by the average fuel consumption to obtain the operable time. Calculate
Program .

Images