JP2008158994A - Moving body control device, moving body monitoring system, and failure detection method for fuel filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a moving body control device, a moving body monitoring system and a failure detection method for a fuel filter, detecting precisely use of a forged fuel filter or inferior fuel, irrespective of an operation environment of a moving body. <P>SOLUTION: This moving body control device communicated with the moving body, and for storing history information (normal history information) of a pressure data in a genuine fuel filter, generates history information (moving body history information) of a pressure data received from the moving body, compares the moving body history information with the normal history information, and detects the failure of the fuel filter, referring to an initial value of the moving body history information and a variation thereof, when no correlation exists between them. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a moving body management apparatus, a moving body monitoring system, and a fuel filter abnormality detecting method for detecting an abnormality of a fuel filter that filters fuel supplied to an engine that is a driving source of the moving body.

  In a pipe that supplies fuel to an engine that is a driving source of a moving body, a fuel filter is provided between the fuel tank and the engine in order to remove impurities contained in the fuel. The fact is that many counterfeit products have been created for fuel filters in addition to genuine products that conform to the standards for moving objects. In general, counterfeit products have a coarser filter element (filter material) and lower filtration efficiency than genuine products. For this reason, the pressure difference between the fuel pipes before and after the fuel filter does not increase as in the genuine product. In addition, the counterfeit product is prone to oil leakage due to the rough stitching of the seams of the filter elements, and there may be little pressure change before and after the fuel filter. As described above, when a counterfeit product is used as a fuel filter, the remaining fuel is supplied to the engine without sufficiently filtering impurities, which may hinder the operation of the engine.

  As an example in which an abnormality occurs in the fuel filter, a case where poor fuel is used can also be mentioned. Poor fuel contains a larger amount of impurities than regular fuel. For this reason, the clogging of the fuel filter occurs faster than when regular fuel is used, and the replacement cycle of the fuel filter has to be shortened.

  Under such circumstances, various techniques for detecting abnormality of the fuel filter due to the use of a counterfeit fuel filter or clogging of the fuel filter and notifying the user of the detection result have been disclosed. (For example, see Patent Documents 1 to 4).

JP-A-2005-273196 JP 2006-63856 A JP 2006-7140 A JP 2006-283724 A

  By the way, in regions with different environments such as air temperature, atmospheric pressure, and humidity, there may be a difference in the viscosity and fuel flow rate of the fuel of the moving body, and different types of fuel filters may be used. However, the above-described prior art cannot detect abnormality of the fuel filter that sufficiently reflects the operating environment of such a moving body. That is, in the above-described conventional technology, the fuel filter abnormality detection is performed using the same determination criterion regardless of the operating environment of the moving body, and thus there is a problem in the abnormality detection accuracy depending on the region where the moving body operates. There was a fear.

  The present invention has been made in view of the above, and a mobile object management apparatus and a mobile object monitoring system capable of accurately detecting the use of a counterfeit fuel filter or poor fuel regardless of the operating environment of the mobile object. And an abnormality detection method for a fuel filter.

  In order to solve the above-described problems and achieve the object, a mobile body management device according to the present invention includes position information of a mobile body provided with a fuel filter that filters fuel supplied to an engine that is a drive source, Mobile body management apparatus for receiving mobile body information having pressure data obtained by using the pressure in the fuel pipe in the vicinity of a fuel filter from the mobile body, and managing the mobile body using the received mobile body information The history information generating means for generating the moving body history information including the history of the pressure data, and the regular history information including the standard history of the pressure data when the fuel filter is a genuine product, The storage means for storing the information in association with the position information of the moving object, the moving object history information generated by the history information generating means, and the pressure data included in the moving object history information are transmitted. Correlation determining means for determining the presence or absence of correlation with the normal history information associated with the position information of a moving body, an abnormality detecting means for detecting an abnormality of the fuel filter based on a result determined by the correlation determining means, Transmission means for transmitting detection information including a detection result of the abnormality detection means and an operation command signal of the moving body according to the detection result to the moving body.

  Further, in the above invention, the mobile body management apparatus according to the present invention is such that, when the abnormality detection means has no correlation between the mobile body history information and the regular history information as a result of the determination by the correlation determination means, The pressure data constituting the moving body history information and the normal history information are compared at a predetermined time, and the pressure data constituting the moving body history information and the normal history information are data per predetermined time, respectively. The latest data change amount is compared among the change amounts, and abnormality of the fuel filter is detected based on the comparison result.

  In the mobile management device according to the present invention as set forth in the invention described above, the storage means includes counterfeit filter history information including a standard history of the pressure data when the fuel filter is a counterfeit product, and the fuel The bad fuel history information including a standard history of the pressure data in the case of the bad fuel is stored in association with the position information of the moving body, and the correlation determination means is configured to store the moving body history information and the regularity information. If there is no correlation with history information, the forgery filter history information associated with the moving body history information and the position information of the moving body that has transmitted the pressure data included in the moving body history information and / or The presence or absence of correlation with the bad fuel history information is determined.

  In the mobile management apparatus according to the present invention as set forth in the invention described above, the information stored in the storage means is updated at predetermined time intervals using the mobile history information.

  In the mobile management device according to the present invention as set forth in the invention described above, the pressure data is a differential pressure between the pressures in the pipes before and after the fuel filter.

  A mobile body monitoring system according to the present invention includes a mobile body provided with a fuel filter that filters fuel supplied to an engine that is a drive source, and information transmitted from the mobile body in communication connection with the mobile body. And a moving body management system that manages the moving body using the moving body monitoring system, wherein the moving body is disposed on at least one of an upstream side and a downstream side of the fuel pipe in the vicinity of the fuel filter. Corresponding to the pressure in the pipe by performing a predetermined correction on the pressure sensor provided and each of the pressure in the pipe sequentially detected by the pressure sensor, and averaging the sequentially corrected value in a predetermined cycle The position information of the moving body transmitted from the pressure data generating means for generating pressure data and the positioning means for measuring the position of the object is acquired, and the acquired position information and the pressure A mobile device that transmits information on the mobile body having pressure data generated by the data generation means to the mobile body management device, and that receives information transmitted from the mobile body management device. The apparatus includes history information generating means for generating moving body history information including a history of the pressure data, and regular history information including a standard history of the pressure data when the fuel filter is a genuine product. Corresponding to position information of the moving body that has transmitted the pressure data included in the moving body history information, and the moving body history information generated by the history information generating means, and storage means that stores in association with the position information of the body Correlation determining means for determining the presence or absence of correlation with the regular history information to be attached, and an abnormality detecting means for detecting an abnormality of the fuel filter based on a result determined by the correlation determining means When, characterized by comprising a transmission means for transmitting the detection information including the operation command signal of the detection result and the moving object in accordance with the detection result of the abnormality detecting means to said mobile.

  The fuel filter abnormality detection method according to the present invention uses position information of a moving body including a fuel filter that filters fuel supplied to an engine that is a driving source, and pressure in the fuel pipe in the vicinity of the fuel filter. A fuel filter for receiving a moving body information having pressure data obtained from the moving body, and a moving body management device that manages the moving body using the received moving body information detects an abnormality of the fuel filter. And a history information generating step for generating moving body history information including a history of the pressure data, a moving body history information generated in the history information generating step, and the moving body history information. A standard history of the pressure data when the fuel filter is a genuine product is associated with the position information of the mobile body that has transmitted the pressure data. Correlation determination step for determining presence / absence of correlation with normal history information, an abnormality detection step for detecting an abnormality of the fuel filter based on a result determined in the correlation determination step, a detection result of the abnormality detection step, and the detection A transmission step of transmitting detection information including an operation command signal of the moving body according to a result to the moving body.

  According to the present invention, a mobile body management apparatus that communicates with a mobile body and stores pressure data history information (regular history information) for a genuine fuel filter stores pressure data history information (mobile body) received from the mobile body. (History information) is generated, and the moving body history information is compared with the normal history information. If there is no correlation between the two, the fuel filter abnormality is detected by referring to the initial value and the change amount of the moving body history information. Therefore, it is possible to detect an abnormality using a normal history suitable for the environment where the mobile object is located. Therefore, it is possible to accurately detect the use of a counterfeit fuel filter or poor fuel regardless of the operating environment of the moving body.

  The best mode for carrying out the present invention (hereinafter referred to as “embodiment”) will be described below with reference to the accompanying drawings.

(Embodiment 1)
FIG. 1 is a diagram showing a schematic configuration of a mobile object monitoring system according to Embodiment 1 of the present invention. The mobile body monitoring system 100 shown in the figure is obtained from a plurality of mobile bodies 1 to be monitored and communication information connected to the mobile body 1 and positional information transmitted from the mobile body 1 and a differential pressure before and after the fuel filter. And a moving body management device 2 that detects an abnormality of the fuel filter of the moving body 1 by using the pressure data. The moving body 1 can receive position information of the moving body 1 transmitted from a plurality of GPS satellites 3 constituting a GPS (Global Positioning System) as positioning means for positioning the position of an object on the ground. It is possible to communicate with the ground station server 5 via. The mobile management device 2 is configured by any one of the Internet, an intranet, a dedicated line, or an appropriate combination, and communicates with the ground station server 5 via a network NW capable of transmitting and receiving information according to a predetermined protocol. It is connected.

  The mobile body 1 acquires the position information of the mobile body 1 received by the GPS sensor 10 (a part of the positioning means) and the GPS sensor 10 that receives the position information of the mobile body 1 transmitted from the GPS satellite 3, A communication device 11 that transmits the mobile body information including the position information and pressure data to the mobile body management device 2 and a transceiver 12 that is connected to the ground station server 5 and transmits the mobile body information output from the communication device 11. And comprising. The GPS sensor 10 detects position information of the moving body 1 based on information transmitted from a plurality of GPS satellites 3 via the antenna 10a. The transceiver 12 transmits and receives information to and from the ground station server 5 via the antenna 12a, the communication satellite 4, and the antenna 5a.

  The communication device 11 includes a communication control unit 111 and a clock 112 having a timer function. The communication control unit 111 sets the position information of the moving body 1 acquired from the GPS sensor 10, the pressure data acquired from the engine control unit 16, the operating time information (service meter information) of the moving body 1, and the moving body ID as a set of positions. While transmitting as information, the information received from the outside via the transceiver 12 is acquired.

  The moving body 1 is a construction machine, and includes a working machine 13 such as a bucket or an arm, and an engine 14 that is a drive source. The work machine 13 is driven and controlled by the work machine control unit 15, and the engine 14 is driven and controlled by the engine control unit 16. A drive control command is input to the work implement control unit 15 and the engine control unit 16 through the operation input unit 17.

  The engine 14 includes an engine speed sensor 141 that detects the engine speed, and a fuel injection device 142 that injects fuel supplied from the fuel tank 18 via the pipe 19. A pipe 19 that supplies fuel from the fuel tank 18 includes a temperature sensor 20 that detects the temperature of the fuel, a pump 21 that pushes out the fuel, a pressure sensor 22 that is positioned downstream of the pump 21 and detects the pressure of the pushed fuel, A fuel filter 23 for filtering the fuel and a pressure sensor 24 for detecting the pressure of the fuel filtered by the fuel filter 23 are sequentially interposed.

  The engine 14 is connected to a generator (alternator) 25, and the generator 25 is driven to charge a battery 26 that is a power source of the moving body 1. The key switch 27 generates an engine start signal.

  The engine control unit 16 has a pressure data generation unit 161 that acquires pressure values from the pressure sensors 22 and 24 and generates pressure data to be transmitted to the mobile management device 2 using the pressure values. Specifically, the pressure data generation unit 161 calculates a differential pressure between the pressure values acquired from the pressure sensors 22 and 24, and corrects the differential pressure. The pressure data generation unit 161 generates pressure data by calculating an average value of the correction values over a predetermined period, and outputs the pressure data to the communication device 11.

  The moving body 1 further includes a display device 28 that displays various types of information and a storage device 29 that stores various types of information. The storage device 29 stores the pressure data calculated by the pressure data generation unit 161 of the engine control unit 16, acquires the operation status of the work machine 13 from the work machine control unit 15, and operates the engine 14 from the engine control unit 16. The status, the operation information of the generator 25, and the voltage information of the battery 26 are stored. In addition, the storage device 29 also stores instruction contents transmitted from the mobile management device 2. In FIG. 1, the connection relationship between the display device 28 and the storage device 29, the communication device 11, the work machine control unit 15, and the engine control unit 16 is omitted in order to avoid complicated description.

  Next, the configuration of the mobile management apparatus 2 according to the first embodiment will be described. The mobile body management device 2 is realized by using one or a plurality of computers, and receives the mobile body information transmitted from the mobile body 1 while transmitting / receiving information to the mobile body 1 (transmission means 30). And a storage unit 31 that stores various types of information including mobile body information transmitted from the mobile body 1, and a control unit 32 that controls the operation of the mobile body management device 2.

  The storage unit 31 stores the moving body information storage unit 311 that stores the moving body information received by the transmission / reception unit 30 and the normal history information including the standard history of pressure data when the fuel filter 23 is a genuine product. A standard history information storage unit 312 that stores information in association with area information determined using information, a filter state storage unit 313 that stores the state of the fuel filter 23, and an area information storage unit 314 that stores area information. Have.

  The control unit 32 includes a history information generating unit 321 that generates moving body history information including a history of pressure data of the moving body 1 included in the moving body information received by the transmission / reception unit 30, and movement generated by the history information generating unit 321. A correlation determination unit 322 that determines whether or not there is a correlation between the body history information and the normal history information stored in the standard history information storage unit 312 of the storage unit 31, and the fuel of the moving body 1 based on the determination result of the correlation determination unit 322 An abnormality detection unit 323 that detects an abnormality of the filter 23.

  FIG. 2 is a sequence diagram showing an outline of the fuel filter abnormality detection process of the moving body 1 performed by the moving body monitoring system 100. In FIG. 2, the moving body 1 first generates pressure data of the fuel filter 23 (step S11).

  FIG. 3 is a flowchart showing an outline of the pressure data generation process in the moving body 1. In FIG. 3, first, the engine control unit 16 acquires the engine speed from the engine speed sensor 141 (step S101).

  Next, the engine control unit 16 determines whether or not the engine speed acquired in step S101 satisfies a predetermined operating condition (step S102). As the operating condition, for example, “the engine speed is 2000 to 2500 rpm” can be set. The reason why the operating conditions are imposed in this manner is to suppress the variation in the pressure value due to external factors.

  When the engine speed satisfies a predetermined operating condition (Yes at Step S102), the engine control unit 16 acquires a pressure value from the pressure sensors 22 and 24 (Step S103). On the other hand, when the engine speed does not satisfy the predetermined operating condition (No at Step S102), the engine control unit 16 returns to Step S101 and repeats the process.

  Subsequently, the pressure data generation unit 161 of the engine control unit 16 calculates a differential pressure between the pressure values acquired from the pressure sensors 22 and 24 (step S104). The differential pressure ΔP is expressed by ΔP = | Pin−Pout, where Pin is a measured value of the pressure sensor 22 that is the pressure of the inlet port of the fuel filter 23, and Pout is a measured value of the pressure sensor 24 that is the outlet port pressure of the fuel filter 23. | (Right side is absolute value).

  Thereafter, the engine control unit 16 acquires the pipe temperature from the temperature sensor 20 (step S105), and then acquires the fuel flow rate from the injection amount of the fuel injection device 142 (step S106).

  Next, the pressure data generation unit 161 corrects the differential pressure ΔP using the temperature in the pipe acquired from the temperature sensor 20 and the fuel flow rate acquired from the fuel injection device 142 (step S107). In this step S107, correction is performed so as to reduce the influence of changes in pipe temperature and fuel flow rate, and this corrected value (pressure correction value) is stored in the storage device 29.

  When a predetermined period has elapsed since the previous pressure data generation (step S108, Yes), the pressure data generation unit 161 calculates an average of pressure correction values measured from the storage device 29 during the predetermined period as pressure data, and stores the storage device. 29 is written (step S109). At this time, the pressure data generation unit 161 removes noise and the like included in the acquired pressure data, and then averages the pressure correction values by high-speed FFT or wavelet transform.

  On the other hand, in step S108, when the predetermined time has not elapsed since the previous pressure data generation (step S108, No), the pressure data generation unit 161 returns to step S101 and repeats the process.

  Following the pressure data generation process of step S11 described above, the communication control unit 111 of the communication device 11 transmits the generated pressure data to the mobile management device 2 (step S12). At this time, the communication control unit 111 reads the pressure data from the storage device 29, and also includes the latest position information acquired from the GPS sensor 10, the mobile body information including the identification number and operating time information (service meter information) of the mobile body 1. Is transmitted to the mobile management device 2 (step S12).

  The transmission timing of the mobile body information by the communication device 11 is arbitrary. For example, it is desirable that the differential pressure correction value be transmitted at a timing when a sufficient time has elapsed so that the variation as the differential pressure value under the acquisition conditions is sufficiently suppressed to be an averaged representative value.

  The mobile body management device 2 writes and stores the mobile body information received from the mobile body 1 in the mobile body information storage unit 311 (step S21). FIG. 4 is a diagram showing a configuration of a mobile body information management table stored in the mobile body information storage unit 311. In the moving body information management table T1 shown in the figure, moving body information transmitted from the moving body 1 is recorded as a set of moving body ID, GPS position information, operating time information, and pressure data.

  In the first embodiment, as the moving body information, the GPS position information and the type of the moving body are included together with the pressure data. Therefore, by referring to such moving body information, the regionality and movement of the position of the moving body 1 A prediction can be made taking into account the type of body 1. The advantage of using such mobile information will be described. For example, since the meteorological conditions such as air temperature and pressure are significantly different between the vicinity of the equator and the north pole, the reference fuel viscosity is also significantly different. For this reason, it is assumed that the fuel filter to be used has a different characteristic. Further, when the moving body is a work machine, the number of fuel filters to be used is different for each vehicle type such as a dump truck or a power shovel, and the pressure data is also different. In this way, by handling only appropriate statistical data according to the position and type of the moving body, it becomes possible to manage various history information described later with high accuracy.

  Thereafter, the mobile body management device 2 performs an abnormality detection process for the fuel filter 23 based on the information received from the mobile body 1 (step S22).

  FIG. 5 is a flowchart showing an outline of the abnormality detection process of the fuel filter 23 in the mobile body management apparatus 2. In FIG. 5, the mobile body management device 2 first determines whether or not it is necessary to set an event time that is a starting point when generating the history of the pressure data P of the mobile body 1. That is, the mobile body management device 2 compares the pressure data P received from the mobile body 1 with the pressure data P1 received last time and the initial data Pc when the fuel filter 23 is replaced (step S201). As a result of this comparison, if P1> Pc and P ≦ Pc (step S201, Yes), it can be considered that the fuel filter 23 has been replaced, so the mobile unit management apparatus 2 sets that time as the event occurrence time (step S202). . If P1> Pc and P ≦ Pc are not satisfied (step S201, No), the process proceeds to step S203 described later.

  Subsequently, the history information generation unit 321 of the moving body management apparatus 2 generates moving body history information including the history of pressure data of the moving body 1 (step S203). At this time, the history information generation unit 321 generates a moving body history line indicating the relationship between the pressure data P of the moving body 1 and the time Hr after the event occurrence time is set as the moving body history information.

  After step S203, when a predetermined time (K) has elapsed from the event occurrence time (step S204, Yes), the mobile unit management apparatus 2 stores the storage unit 31 based on the GPS position information received from the mobile unit 1. The area information stored in the area information storage unit 314 is acquired (step S205). FIG. 6 is a diagram showing a configuration of an area ID management table stored in the area information storage unit 314. The area ID management table T2 shown in the figure records a plurality of area information with the area ID, the area name, and the range of GPS position information corresponding to the area ID as a set of area information. The predetermined time in step S204 is preferably set as a time such that the history of the pressure data of the moving body 1 is stabilized and the tendency of the pressure data becomes remarkable.

  Next, the correlation determination unit 322 acquires the normal history line stored in the standard history information storage unit 312 as the normal history information corresponding to the area information of the mobile body 1 (step S206). The correlation with the moving body history line generated in S203 is determined (step S207). At this time, for example, when the difference between the pressure data P at the same time between the moving body history line and the normal history line becomes larger than a predetermined threshold, the correlation determination unit 322 determines that there is no correlation between the two. When the correlation determination unit 322 determines that there is a correlation between the moving body history line and the normal history line (step S208, Yes), the process returns to step S201 and the process is repeated.

  Hereinafter, the case where the correlation determination unit 322 determines in step S208 that there is no correlation between the moving body history line and the normal history line (No in step S208) will be described. In this case, the abnormality detection unit 323 first determines the magnitude of the tangent slope (referred to as F ′) of the normal history line at that time and the tangential slope (referred to as G ′) of the mobile object history line at that time. And the value of the pressure data P at the event occurrence time is referred to. As a result, when F ′ <G ′ and P = Pc (step S209, Yes), the abnormality detection unit 323 detects an abnormality of the fuel filter 23 caused by the use of poor fuel (step S210).

  FIG. 7 is a diagram illustrating the shape of the moving body history line when the abnormality detection unit 323 detects an abnormality caused by the use of poor fuel, where the horizontal axis represents time (Hr) and the vertical axis represents pressure data (P ). In FIG. 7, the moving body history line G <b> 1 has the pressure data P rising earlier than the normal history line F. The initial data of the moving body history line G1 is the same as the initial data Pc of the normal history line F. Since the poor fuel is more contaminated than the regular fuel, the fuel filter 23 is clogged quickly. For this reason, the pressure in the piping tends to increase in a shorter time than when regular fuel is used. Therefore, the abnormality detection unit 323 can determine that the abnormality is caused by the use of poor fuel when the moving body history line shows a behavior like the moving body history line G1 shown in FIG.

  Next, the case where F ′ <G ′ and P = Pc is not satisfied in step S209 (No in step S209) will be described. In this case, if F ′> G ′ and P ≦ Pc (step S211, Yes), the abnormality detection unit 323 detects an abnormality of the fuel filter 23 resulting from the use of the forgery filter (step S212).

  FIG. 8 is a diagram illustrating the shape of the moving body history line when the abnormality detection unit 323 detects an abnormality caused by the use of the forgery filter, where the horizontal axis represents time (Hr) and the vertical axis represents pressure data (P ). In FIG. 8, the moving body history line G2 has lower initial data than the initial data Pc of the normal history line F, and the rising of the pressure data with the passage of time is slow.

  In general, a counterfeit filter has a rougher filter element (filter material) than a genuine filter, and has a wide passage area when fuel passes. For this reason, the forged filter does not increase the differential pressure before and after the filter as in the case of a genuine filter due to, for example, fuel leaking from the joint of the filter element. Therefore, the abnormality detection unit 323 can determine that the abnormality is caused by the use of the forgery filter when the moving body history line exhibits a behavior like the moving body history line G2 illustrated in FIG.

  On the other hand, if F ′> G ′ and P ≦ Pc are not satisfied (step S211, No), an abnormality cannot be determined at this stage. Therefore, the abnormality detection unit 323 changes the process according to whether or not the determination result of no correlation in the correlation determination unit 322 is the first “no correlation” after setting the event occurrence time (step S213). That is, the abnormality detection unit 323 gives the time after the correlation between the moving body history line and the normal history line is lost when this time is the first “no correlation” after setting the event occurrence time (step S213, Yes). The non-correlation occurrence time Tc is set to 0 (step S214), and the process returns to step S201 to repeat the process.

  On the other hand, if this time is not the first “no correlation” after the event occurrence time setting (No in step S213), the abnormality detection unit 323 responds whether or not the uncorrelation occurrence time Tc has reached a predetermined threshold value H. Process. This threshold value H is set as the minimum time during which the abnormality detection unit 323 can determine abnormality. For this reason, when Tc <H is satisfied (step S215, Yes), the process returns to step S201 and is repeated.

  If Tc <H is not satisfied in step S215, that is, if the non-correlation occurrence time Tc has reached H (step S215, No), the pressure data P at that time does not satisfy P ≦ Pc (step S216, No) ), The abnormality detection unit 323 detects an abnormality caused by the use of the forgery filter (step S212). FIG. 9 is a diagram showing changes in the moving body history line in this case. The moving body history line G3 shown in the figure shows the behavior along the normal history line F at first, but eventually deviates from the normal history line F and does not fall to the initial data Pc, so that Tc = H. Reach. Therefore, in this case, since there is a high possibility that the filter has not been replaced, the abnormality detection unit 323 determines that the moving body history line G3 is a history line using a forgery filter.

  The moving body history line G3 shown in FIG. 9 may occur when the counterfeit filter is loosely sewn. In this case, after the event occurrence time, in the initial stage, the proper operation is performed in the same manner as the genuine filter, but since the deterioration in the stitching part proceeds faster than the genuine filter, the life is short, and the pressure suddenly starts from a certain point. Does not increase. In the case of FIG. 9, since the pressure data does not drop to the initial data Pc even after looking at the subsequent history, the possibility that the filter has been replaced is low, and the possibility that the filter is a counterfeit filter is high. As described above, the threshold value H of the non-correlation occurrence time Tc is set as a time during which at least the difference between the forgery filter and the filter replacement can be determined.

  As a moving body history line that matches the normal history line F in the initial stage and deviates from the middle, there may be cases shown in FIGS. 10 and 11 in addition to FIG. The moving body history lines G4 and G5 shown in FIGS. 10 and 11 respectively have the pressure data P lower than the initial data Pc before Tc = H. Therefore, at that time, the event occurrence time is reset (step S202), and whether or not it is a forgery filter is determined by the subsequent behavior.

  First, in the case shown in FIG. 10, since the pressure data P does not become larger than the initial data Pc even after a predetermined time has elapsed from the reset event occurrence time, the abnormality detection unit 323 is an abnormality caused by the forgery filter. Is shown.

  On the other hand, in the case shown in FIG. 11, the pressure data P is larger than the initial data Pc when a predetermined time elapses after the event time is reset. For this reason, in the case shown in FIG. 11, there is a high possibility that the filter has been replaced and a genuine product has been attached, so that the abnormality detection unit 323 does not determine abnormality. In this case, filter replacement can be automatically detected, so that management of the filter replacement history can be appropriately performed without human intervention.

  When an abnormality is detected by the fuel filter abnormality detection process (step S22) described above, the mobile body management device 2 instructs the content of the detected abnormality and the operation to be performed by the mobile body 1 according to the content of the abnormality. Detection information including the operation instruction signal to be transmitted is transmitted to the moving body 1 (step S23).

  The communication device 11 of the mobile body 1 performs processing according to the detection information transmitted from the mobile body management device 2 (step S13). FIG. 12 is a diagram showing a configuration of the reception event ID management table included in the detection information sent from the mobile management device 2. The received event ID management table T3 shown in the figure corresponds to the content (message) displayed on the display device 28 and the event ID for each event ID for identifying the content of the abnormality detected by the mobile management device 2. An action ID (operation instruction signal) for instructing an operation to be performed by the moving body 1 is described. For example, action ID “1” (when using a counterfeit filter) corresponds to an operation of blinking a warning lamp on the display device 28. The action ID “2” (when using poor fuel) corresponds to a decrease in engine speed (torque reduction) of the engine 14. By reducing the engine speed in this way, the fuel flow rate is limited, and problems such as knocking due to the use of poor fuel can be made difficult to occur. Further, when an abnormality occurs in the injection system parts or the injector is clogged, it is possible to prevent the occurrence of problems such as normal fuel injection becoming difficult and the engine not operating.

  In addition to the above, for example, the action ID “0” may be set to take no action (no action). Alternatively, the mobile body 1 may be provided with a voice output device so that a warning sound is generated when the action ID is “1”.

  The mobile body management device 2 records the detection information in the filter state storage section 313 of the storage section 31 after transmitting the information to the mobile body 1 (step S24). FIG. 13 is a diagram illustrating a configuration of a filter state management table stored in the filter state storage unit 313. In the filter state management table T4 shown in the figure, the mobile body 1 with the mobile body ID 100 is in a counterfeit filter use state (a state in which a counterfeit filter flag is set), and the mobile body 1 with the mobile body ID 200 is in a bad fuel use state (poor fuel). This shows a case where the mobile object 1 with the mobile object ID 300 is in a normal state.

  According to the first embodiment of the present invention described above, a mobile body management device that communicates with a mobile body and stores history information (regular history information) of pressure data for a genuine fuel filter is received from the mobile body. Generate pressure data history information (mobile body history information), compare this mobile body history information with regular history information, and if there is no correlation between them, refer to the initial value and the amount of change of the mobile body history information In order to detect the abnormality of the fuel filter, the abnormality detection using the normal history suitable for the environment where the moving body is located can be performed. Accordingly, it is possible to appropriately cope with various operating environments in which the moving body is placed, and it is possible to accurately detect the use of a counterfeit fuel filter or poor fuel regardless of the operating environment of the moving body.

  Further, according to the first embodiment, since the use environment is known from the GPS position information, by using only the pressure data for each region and creating a regular history line for each region, compared with the case where regional characteristics are not considered. Data variation. In addition, since the amount of data calculation can be reduced, the load on the mobile management device is reduced, and the reliability of the regular history line is improved.

  Further, according to the first embodiment, by obtaining the differential pressure before and after the fuel filter as the pressure data, it is possible to more accurately detect the deterioration degree of the fuel filter and the performance of the fuel filter.

  In addition, according to the first embodiment, it is possible to detect an abnormality in the fuel filter of the moving body by a predetermined communication network even at a place far away from the moving body. When an abnormality of the fuel filter is detected, the mobile body management device can transmit a signal for taking a maintenance procedure according to the type of abnormality to the mobile body.

  In the first embodiment, the abnormality detection is performed using the moving body history line using the pressure data and time as variables. However, the abnormality detection is performed using the history line using the total fuel injection amount and pressure as variables. May be. Thus, the history information of the pressure data can include various parameters.

  In addition, the mobile unit management device transmits normal history information of pressure data when the fuel filter is a genuine product to the mobile unit, and the engine control unit of the mobile unit autonomously detects an abnormality in the pressure data, and Conservation measures may be taken according to the detection result.

  Furthermore, the history information stored in the standard history information storage unit may be updated every predetermined time using the information accumulated as the moving body history information. For example, if the moving body history information is based on the use of a genuine filter, information related to the regular history line is further accumulated. Also, if the moving body history information is associated with an abnormality of the fuel filter, history information indicating such an abnormality of the fuel filter can be accumulated, so when a sufficient amount is accumulated in the future. The history information indicating the abnormality of the fuel filter can also be applied to the abnormality detection process. As a result, it is possible to realize a fuel filter abnormality detection process with higher accuracy.

(Embodiment 2)
Embodiment 2 of the present invention stores a forged filter history line that is a history line when using a forged filter and a bad fuel history line that is a history line when using bad fuel in the storage unit of the mobile management device, When there is no correlation between the moving body history line and the normal history line, the abnormality of the fuel filter is detected by obtaining the correlation with the forged filter history line and the poor fuel history line.

  The configuration of the mobile monitoring system according to the second embodiment is almost the same as the configuration of the mobile monitoring system 100 according to the first embodiment (see FIG. 1), but the storage unit of the mobile management device 2 The contents stored in the 31 standard history information storage unit 312 and the control processing of the control unit 32 are different. Further, the outline of the process of the mobile object monitoring system in the second embodiment is almost the same as the outline of the process of the mobile object monitoring system in the first embodiment (see FIG. 2). The contents of the process (step S22) are different.

  FIG. 14 is a flowchart showing an outline of a fuel filter abnormality detection method according to the second embodiment. In FIG. 14, the processing of steps S301 to S308 is the same as the processing of steps S201 to S208 in FIG.

  Thereafter, the correlation determination unit 322 performs correlation determination between the forgery filter history line and the moving body history line stored in the storage unit 31 (step S309). If there is a correlation (step S310, Yes), Abnormality of the fuel filter due to use of the counterfeit filter is detected (step S311). The correlation determination in the correlation determination unit 322 at this time may be performed in the same manner as the correlation determination between the normal history line and the moving body history line. FIG. 15 is a diagram illustrating an outline of a forged filter history line. The counterfeit filter history line Im has initial data PI lower than the initial data Pc of the normal history line F, and the rise of the pressure data P with the passage of time is slow.

  When there is no correlation with the forged filter history line Im (step S310, No), the correlation determination unit 322 determines the correlation with the poor fuel history line (step S312). If there is a correlation between the poor fuel history line and the moving body history line as a result of the determination (step S313, Yes), the abnormality detection unit 323 detects an abnormality of the fuel filter due to the use of the bad fuel (step S314). ). FIG. 16 is a diagram showing an outline of a poor fuel history line. The poor fuel history line W shown in the figure has the same initial data as the initial data Pc of the normal history line F, but the rise of the pressure data P with the passage of time is earlier than that of the normal history line F.

  If there is no correlation with the poor fuel history line (step S313, No), the abnormality detection unit 323 returns to step S301 and repeats the process. Here, instead of returning to step S301, the correlation determination between the history line of the moving body and the normal history line may be performed in the same manner as in the first embodiment. That is, in the case of No in step S315, the processing in steps S209 to S216 in FIG.

  Note that the order of the correlation determination between the forged filter history line and the moving body history line (step S309) and the correlation determination between the poor fuel and the moving body history line (step S312) are arbitrary, and are performed in the reverse order of FIG. Also good.

  According to the second embodiment of the present invention described above, a mobile body management apparatus that communicates with a mobile body and stores history information (regular history information) of pressure data for a genuine fuel filter is received from the mobile body. Generate pressure data history information (mobile body history information), compare this mobile body history information with regular history information, and if there is no correlation between them, refer to the initial value and the amount of change of the mobile body history information In order to detect the abnormality of the fuel filter, the abnormality detection using the normal history suitable for the environment where the moving body is located can be performed. Therefore, it is possible to appropriately cope with various usage environments in which the moving body is placed, and it is possible to accurately detect the use of a counterfeit fuel filter or poor fuel.

  Further, according to the second embodiment, on the mobile management device side, the counterfeit filter history information including the standard history of pressure data when the fuel filter is a counterfeit product, and the case where the fuel is poor fuel Detect bad fuel history information including standard history of pressure data, and use these history information to determine the authenticity of fuel filter and fuel, thereby detecting fuel filter abnormality using past abnormal data Is possible.

  In view of the fact that counterfeit filters and inferior fuels do not have uniform properties like genuine filters and regular fuels, forgery filters are used as shown in FIG. An area SIm or a poor fuel usage area SW may be set, and when a moving body history line enters the area, the abnormality detection unit 323 may detect an abnormality corresponding to the intruded area.

  Also in the second embodiment, the information accumulated as the moving body history information may be reflected in the history information stored in the standard history information storage unit. As a result, information on the regular history line, the forged filter history line, and the poor fuel history line is sequentially accumulated and updated, so that it is possible to perform abnormality determination processing with higher accuracy.

(Other embodiments)
So far, the first and second embodiments have been described in detail as the best mode for carrying out the present invention, but the present invention should not be limited only by these two embodiments. For example, the pressure data may be measured at either the inlet port or the outlet port of the fuel filter 23. As shown in FIG. 1, when the pump 21 is on the fuel tank 18 side upstream of the inlet port of the fuel filter 23, the pressure in the piping on the inlet port side is measured by the pressure sensor 22 on the inlet port side. Therefore, the pressure sensor 24 is not necessary. In this case, the fuel is pushed out from the pump 21, but as the fuel filter 23 becomes clogged, the influence of the throttle becomes larger, and the pressure of the fuel pipe on the inlet port side of the fuel filter 23 is larger than the negative pressure in the normal state of the filter. High negative pressure.

  On the other hand, as shown in FIG. 18, when the pump 21 is on the engine 14 side downstream from the outlet port of the fuel filter 23, the pressure in the piping on the outlet port side is measured by the pressure sensor 24 on the outlet port side. To do. Therefore, the pressure sensor 22 on the inlet port side is unnecessary. In this case, the fuel is pushed out from the pump 21. At this time, as the fuel filter 23 becomes clogged, the influence of the throttle increases, and the pressure of the fuel pipe on the outlet port side of the fuel filter 23 becomes negative in the normal state of the filter. High negative pressure compared to pressure.

  By the way, in the present invention, if the time for reaching the pressure data value to replace the fuel filter falls within a predetermined time while the moving body management device is creating the moving body history line, the filter replacement recommendation message is displayed. You may make it transmit to a mobile body and display with a mobile body. A warning transmission time shorter than this predetermined time is set, and a filter replacement warning message is transmitted to a moving body that has not been replaced even when the warning transmission time is reached. A message may be displayed.

  In the above description, the communication between the mobile unit and the mobile unit management apparatus has been described. However, a system capable of communication between the two units and other devices that are connected to each other can also be configured. For example, communication with a mobile phone may be performed, and a mail notifying the optimal filter replacement time may be transmitted to the user's mobile phone at a predetermined timing. Thereby, it becomes possible to perform the filter replacement maintenance of a moving body efficiently. In addition, even when the distance between the user and the nearest service agent is far away, and the serviceman cannot visit frequently, the user can keep track of the time until the filter replacement time. The filter can be ordered in advance after taking into account the filter replacement time, and an optimal patrol plan for filter replacement can be established.

  Furthermore, a system capable of communicating with the management server of the fuel filter manufacturer is configured so that information including the filter state of the mobile object is shared by the user, the mobile object manager (mobile object manufacturer), and the fuel filter manufacturer. Good. As a result, fuel filter manufacturers can take counterfeit filter measures and poor fuel measures by using the history at the time of abnormality, and accurately grasp the number of mobile bodies that are likely to reach the filter replacement time, It is possible to optimize the production plan of the fuel filter.

  The positioning means applied to the present invention is not limited to GPS, and the position of the moving body may be measured using other positioning means.

  The present invention can also be applied to a moving body other than a construction machine, for example, a four-wheeled vehicle.

  Thus, the present invention can include various embodiments and the like not described herein, and various design changes and the like can be made without departing from the technical idea specified by the claims. It is possible to apply.

It is a figure which shows schematic structure of the mobile body monitoring system which concerns on Embodiment 1 of this invention. It is a sequence diagram which shows the outline | summary of the abnormality detection process of the fuel filter of the mobile body which the mobile body monitoring system which concerns on Embodiment 1 of this invention performs. It is a flowchart which shows the outline | summary of the pressure data generation process in a moving body. It is a figure which shows the structure of the mobile body information management table which a mobile body information storage part memorize | stores. It is a flowchart which shows the outline | summary of the abnormality detection process of the fuel filter in the moving body management apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the structure of the area ID management table memorize | stored in an area information storage part. It is a figure which shows the outline | summary of the mobile body history line in case the bad fuel is used. It is a figure which shows the outline | summary (1st example) of the moving body history line in case the forgery filter is used. It is a figure which shows the outline | summary (2nd example) of the moving body history line in case the forgery filter is used. It is a figure which shows the outline | summary (3rd example) of the moving body history line in case the forgery filter is used. It is a figure which shows the outline | summary of the mobile body history line at the time of filter replacement | exchange. It is a figure which shows the structure of the reception event ID management table of the information sent from the mobile body management apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the structure of the filter status management table memorize | stored in a filter status memory | storage part. It is a flowchart which shows the outline | summary of the abnormality detection method of the fuel filter which concerns on Embodiment 2 of this invention. It is a figure which shows the outline | summary of the forgery filter history line applied to the abnormality detection method of the fuel filter which concerns on Embodiment 2 of this invention. It is a figure which shows the outline | summary of the bad fuel history line applied to the abnormality detection method of the fuel filter which concerns on Embodiment 2 of this invention. It is a figure which shows the outline | summary of the forgery filter use area | region applied to the abnormality detection method of the fuel filter which concerns on the modification of Embodiment 2 of this invention, and a bad fuel use area | region. It is a figure which shows schematic structure of the fuel filter vicinity of the moving body which comprises the moving body monitoring system which concerns on another embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile body 2 Mobile body management apparatus 3 GPS satellite 4 Communication satellite 5 Ground station server 5a, 10a, 12a Antenna 10 GPS sensor 11 Communication apparatus 12 Transceiver 14 Engine 16 Engine control part 18 Fuel tank 20 Temperature sensor 21 Pumps 22, 24 Pressure sensor 23 Fuel filter 28 Display device 29 Storage device 30 Transmission / reception unit 31 Storage unit 32 Control unit 100 Mobile body monitoring system 141 Engine speed sensor 142 Fuel injection device 161 Pressure data generation unit 311 Mobile body information storage unit 312 Standard history information storage Section 313 Filter state storage section 314 Area information storage section 321 History information generation section 322 Correlation determination section 323 Abnormality detection section NW network

Claims (7)

Moving body information having position information of a moving body provided with a fuel filter for filtering fuel supplied to an engine as a driving source, and pressure data obtained using pressure in the fuel pipe in the vicinity of the fuel filter. A mobile unit management apparatus that receives from the mobile unit and manages the mobile unit using the received mobile unit information,
History information generating means for generating moving body history information including a history of the pressure data;
Storage means for storing regular history information including a standard history of the pressure data when the fuel filter is a genuine product in association with position information of the moving body;
It is determined whether or not there is a correlation between the moving body history information generated by the history information generating unit and the normal history information associated with the position information of the moving body that has transmitted the pressure data included in the moving body history information. Correlation determination means;
An abnormality detecting means for detecting an abnormality of the fuel filter based on a result determined by the correlation determining means;
Transmitting means for transmitting detection information including a detection result of the abnormality detection means and an operation command signal of the moving body according to the detection result to the moving body;
A moving body management apparatus comprising: The abnormality detection means includes
When there is no correlation between the moving body history information and the normal history information as a result of the determination by the correlation determination means, the value at a predetermined time of the pressure data constituting the moving body history information and the normal history information, respectively. And comparing the latest data change amount among the data change amounts per predetermined time of the pressure data constituting the moving body history information and the regular history information, respectively, and based on the comparison result, the fuel The moving body management apparatus according to claim 1, wherein an abnormality of the filter is detected. The storage means
Forgery filter history information including a standard history of the pressure data when the fuel filter is a counterfeit, and poor fuel history information including a standard history of the pressure data when the fuel is a poor fuel , Storing the information in association with the position information of the mobile body,
The correlation determination means includes
When there is no correlation between the moving body history information and the regular history information, the moving body history information is associated with the position information of the moving body that has transmitted the pressure data included in the moving body history information. The moving body management apparatus according to claim 1, wherein presence or absence of correlation with the forgery filter history information and / or the poor fuel history information is determined.   The mobile unit management apparatus according to claim 1, wherein the information stored in the storage unit is updated at predetermined time intervals using the mobile unit history information.   The mobile body management apparatus according to any one of claims 1 to 4, wherein the pressure data is a differential pressure between pipe pressures before and after the fuel filter. A mobile body including a fuel filter that filters fuel supplied to an engine that is a drive source, and a mobile body that is connected to the mobile body and manages the mobile body using information transmitted from the mobile body A mobile monitoring system having a management device,
The moving body is
A pressure sensor provided on at least one of an upstream side and a downstream side of the fuel pipe in the vicinity of the fuel filter;
A pressure for generating pressure data corresponding to the pressure in the pipe by performing a predetermined correction on each of the pressures in the pipe sequentially detected by the pressure sensor, and averaging the successively corrected values in a predetermined cycle. Data generation means;
Position information of the moving body transmitted from the positioning means for positioning the position of the object is acquired, and moving body information having the acquired position information and pressure data generated by the pressure data generating means is obtained as the moving body. While transmitting to the management device, a communication device that receives information transmitted from the mobile management device,
With
The mobile management device is
History information generating means for generating moving body history information including a history of the pressure data;
Storage means for storing regular history information including a standard history of the pressure data when the fuel filter is a genuine product in association with position information of the moving body;
It is determined whether or not there is a correlation between the moving body history information generated by the history information generating unit and the normal history information associated with the position information of the moving body that has transmitted the pressure data included in the moving body history information. Correlation determination means;
An abnormality detecting means for detecting an abnormality of the fuel filter based on a result determined by the correlation determining means;
Transmitting means for transmitting detection information including a detection result of the abnormality detection means and an operation command signal of the moving body according to the detection result to the moving body;
A moving body monitoring system comprising: Moving body information having position information of a moving body provided with a fuel filter for filtering fuel supplied to an engine as a driving source, and pressure data obtained using pressure in the fuel pipe in the vicinity of the fuel filter. A mobile body management apparatus that receives from the mobile body and manages the mobile body using the received mobile body information is a fuel filter abnormality detection method for detecting abnormality of the fuel filter,
A history information generating step for generating moving body history information including a history of the pressure data;
The moving body history information generated in the history information generating step is associated with the position information of the moving body that has transmitted the pressure data included in the moving body history information, and the fuel filter is a genuine product. A correlation determination step for determining the presence or absence of correlation with normal history information including a standard history of pressure data;
An abnormality detection step of detecting an abnormality of the fuel filter based on a result determined in the correlation determination step;
A transmission step of transmitting detection information including a detection result of the abnormality detection step and an operation command signal of the moving body according to the detection result to the moving body;
An abnormality detection method for a fuel filter, comprising:

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