JP4915096B2 - Vehicle parts deterioration detection device - Google Patents

Description

  The present invention relates to a vehicle component deterioration detection device that detects deterioration of a vehicle component that may affect vehicle behavior.

  Conventionally, as a vehicle component deterioration detection device that detects deterioration of a vehicle component that can affect vehicle behavior, for example, there is a “vehicle information recording device” disclosed in Patent Document 1 below. According to this disclosed technology, a means for calculating the energy consumption rate based on the vehicle travel distance and the amount of energy consumption is provided, and the current rate of the vehicle is compared by comparing the consumption rate information derived thereby and the travel information at normal time. It is possible to detect performance degradation and predict performance degradation.

Specifically, information (speed information, speed information, mileage information, etc.) during running of the vehicle is sequentially sampled (for example, at intervals of 1 second) and recorded on the recording memory card via the recording memory card slot. It is assumed that the recorded performance information of the vehicle is compared with the normal information of the vehicle recorded by the user in the recording memory card 503 in advance to predict the performance degradation of the vehicle (Patent Document 1; Paragraph No. 0053-). 0055).
JP-A-10-132585

  However, according to the “vehicle information recording device” disclosed in the above-mentioned Patent Document 1, in the means for predicting such performance deterioration, information used for predicting the performance deterioration of the vehicle is, for example, rotation speed information or The information is limited to those obtained from the drive system and the travel system that constitute the vehicle, such as speed information and travel distance information.

  Therefore, for example, even when the same rotation speed information is used, the load on the engine etc. differs between the case of traveling on a relatively flat road and the case of traveling on a steep slope. The difference between the speed information and the speed information is significant, and the correlation may vary depending on the external environment surrounding the vehicle. It is difficult to predict.

  Note that in the above-mentioned Patent Document 1, such information at the time of traveling of the vehicle is compared with information at the time of normality of the vehicle recorded by the user in advance in a recording memory card, and prediction processing is performed using artificial intelligence in the central control unit. (Patent Document 1; Paragraph No. 0055), however, the above-mentioned Patent Document 1 does not disclose the details of information processing by artificial intelligence.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a vehicle component deterioration detection apparatus that can accurately detect deterioration of a vehicle component that may affect vehicle behavior. There is.

In order to achieve the above object, in the vehicle component deterioration detection device according to claim 1, the vehicle component deterioration detection device detects deterioration of a suspension unit of a vehicle, and the position of a point where the vehicle travels is detected. Position information acquisition means for acquiring information, dynamic information acquisition means for acquiring dynamic state information of the vehicle that can change dynamically as the vehicle travels in correspondence with the position information, and the position information acquisition means Reference information storage that stores, as reference information, the past position information that has already been acquired by the above and the past dynamic state information that has been acquired in the past by the dynamic information acquisition means in correspondence with the past position information. And the current position information acquired this time by the position information acquisition means and the past position information stored as the reference information in the reference information storage means If the position information comparison / determination unit determines that the two pieces of position information match with each other, the position information comparison / determination unit that determines whether the two pieces of position information match with each other corresponds to the current position information. The current dynamic state information acquired by the dynamic information acquisition unit and the past dynamic state information stored as the reference information in the reference information storage unit corresponding to the past position information The dynamic information comparison and determination means for determining whether or not the two dynamic state information matches, and the dynamic information comparison and determination means determines that the two dynamic state information does not match, the suspension If the deterioration information output means for outputting deterioration information indicating the deterioration of the unit and the dynamic information comparison and determination means determine that the dynamic state information does not match, the position information of the point is stored. If the position information storage means and the position information storage means store the position information of the point, and if the dynamic information comparison and determination means determines that the dynamic state information matches, the road surface is uneven. It is determined whether or not there is an unevenness, and if the unevenness is present, the number of the unevenness is counted up, and it is determined whether or not the suspension unit has deteriorated. counts up the normal numbers as is normal, if the number present is determined that the Ru der than a predetermined value, to calculate the normal rate by dividing the normal number by the number present, the normal rate is predetermined When the value or more, this comprising a reference information deleting means for deleting the reference information on the position information of the stored the point from the reference information storage unit by the position information storage means Is a technical feature.

  In the vehicle component deterioration detection device according to claim 2, the road surface information acquisition means for acquiring unevenness information of the road surface of the point where the vehicle has traveled is provided. The position information comparison and determination unit is configured to determine whether or not the position information matches when the road surface unevenness information acquired by the road surface information acquisition unit exists for the point. Features.

  In the vehicle component deterioration detection device according to claim 3 of the claims, in the vehicle component deterioration detection device according to claim 1 or 2, the position information comparison and determination means did not determine that the both position information matches. In this case, the reference information storage means uses the reference information as the current position information and the current dynamic state information acquired by the dynamic information acquisition means corresponding to the current position information. It is a technical feature to store the past position information and the past dynamic state information to be configured.

  In the vehicle component deterioration detection device according to claim 4, the dynamic state information can be influenced by the static state information of the vehicle that does not change dynamically regardless of the traveling of the vehicle. The reference information storage means includes the static information corresponding to the past position information in addition to the past position information and the past dynamic state information. The vehicle part deterioration detection device according to any one of claims 1 to 3, wherein the past static state information acquired by the information acquisition unit in the past is stored as the reference information. When it is determined by the determination means that the two position information matches, the current static state information acquired by the static information acquisition means corresponding to the current position information and the previous position information do it The deterioration information output means comprises a static information comparison and determination means for comparing the past static state information stored in the reference information storage means and determining whether or not both static state information matches. If the dynamic information comparison / determination means determines that the dynamic state information does not match and the static information comparison / determination means determines that the both static state information matches, the deterioration information Is a technical feature.

  According to the first aspect of the present invention, the past position information already acquired by the position information acquisition means and the past dynamic state information acquired by the dynamic information acquisition means corresponding to the past position information are used as a reference. It is stored as reference information by the information storage means, and the current position information acquired this time by the position information acquisition means and the past position information stored as reference information in the reference information storage means are compared by the position information comparison determination means. Thus, it is determined whether or not both pieces of position information match. If it is determined that the position information matches, the current dynamic state information acquired by the dynamic information acquisition unit corresponding to the current position information and the past position information are stored in the reference information storage unit. The past dynamic state information stored as the reference information is compared by the dynamic information comparison / determination means, and when it is determined that the two dynamic state information does not match, it indicates the deterioration of the vehicle parts related to the dynamic state information. The deterioration information is output by the deterioration information output means.

In other words, according to the first aspect of the present invention, the dynamic state information acquired at a point where the vehicle has traveled in the past is stored as reference information in association with the position information of the point, and the vehicle travels again at the same point. If the current dynamic state information acquired at the time of the comparison is compared with the past dynamic state information stored as the reference information, and the two dynamic state information does not match, the vehicle related to the dynamic state information It is determined that the part has deteriorated, and deterioration information indicating the deterioration of the vehicle part is output. Thereby, in the dynamic information comparison judgment means, in order to compare the reference information (past dynamic state information) acquired at the same point with the current dynamic state information acquired this time, It is possible to determine whether or not they match by comparing the dynamic state information under the same environmental conditions surrounding the vehicle, such as unevenness. Therefore, the vehicle behavior is affected more than when the current dynamic state information is acquired and compared under environmental conditions different from the environmental conditions from which the reference information (past dynamic state information) to be compared is acquired. Since it is possible to accurately determine the presence or absence of deterioration of vehicle parts that can be given, it is possible to accurately detect deterioration of vehicle parts.
In the first aspect of the invention, even if it is determined that the dynamic state information does not match, if the dynamic information comparison determination unit determines that the dynamic state information matches, Since the external environment surrounding the vehicle at the point is likely to have changed (for example, the unevenness of the road surface has disappeared), the number of road surface unevenness is greater than or equal to the predetermined value and the normal number (the suspension unit has deteriorated) If the normal ratio obtained by dividing the number of times determined to be normal without deterioration by the number of existences is equal to or greater than a predetermined value , the reference information regarding the point is deleted. This makes it possible to update the reference information in response to such a change in the external environment, and thus it is possible to prevent erroneous detection accompanying a change in the external environment. Therefore, it is possible to detect the deterioration of the vehicle parts more accurately.

  In the invention of claim 2, when the road surface information acquisition means acquires road surface unevenness information of a point where the vehicle has traveled, and the acquired road surface unevenness information exists for the point where the vehicle travels, both position information is The position information comparison / determination means determines whether or not they match. As a result, the position information comparison / determination unit compares the current position information with the reference information (past position information) and determines whether or not the two position information matches with the acquisition of such unevenness information. Thus, it becomes possible to make a timely comparison and determination of dynamic state information that changes as the vehicle travels on such a rough road surface. Therefore, it is possible to detect the deterioration of the vehicle parts more accurately.

  According to the third aspect of the present invention, when the position information comparison / determination unit does not determine that the two pieces of position information match, the reference information storage unit corresponds to the current position information and the current position information. Is stored as past position information and past dynamic state information constituting the reference information. As a result, it becomes possible to add the dynamic state information about the point that has not been stored in the reference information storage unit until then as the reference information. The information comparison / determination means can perform the comparison and determination as described above using the dynamic state information added this time as reference information.

  In the invention of claim 4, the static information acquisition means acquires the static state information of the vehicle that does not change dynamically regardless of the travel of the vehicle and can affect the dynamic state information, and this static state The information is stored by the reference information storage means as reference information corresponding to the position information. If the position information comparison and determination means determines that the position information matches, the current static state information corresponding to the current position information and the past static state information stored in the reference information storage means are statically compared. It is determined whether or not the static state information is matched by comparing with the target information comparison determination means. If it is determined that the dynamic state information does not match and the static state information matches, the deterioration information output means outputs the deterioration information. Thereby, for example, when the tire air pressure corresponds to this as static state information that can affect the dynamic state information, unless the tire air pressure as the reference information matches the current tire air pressure, Even if it is determined that the dynamic state information does not match, the deterioration information is not output. Therefore, it is possible to detect the deterioration of the vehicle parts more accurately.

  Hereinafter, an embodiment in which a vehicle component deterioration detection device of the present invention is applied to a vehicle-mounted navigation device will be described with reference to the drawings. First, a configuration example of the navigation device 20 will be described with reference to FIGS. FIG. 1 is a block diagram showing a configuration example of the navigation device 20 and the like, and FIG. 2 shows a configuration example of a reference information table stored in the reference information database 23b of the navigation device 20. ing. Further, FIG. 3 (A) shows a state in which the vehicle 100 equipped with the navigation device 20 is traveling on an uneven road surface, and FIG. 3 (B) shows the suspension unit 130 of the vehicle 100 and the like. An example of the configuration is shown.

  As shown in FIGS. 1 and 3A, the navigation device 20 is a type of route guidance device mounted on a vehicle 100 such as an automobile, and mainly includes a CPU 21, a main memory 22, a road information database 23a, and reference information. It comprises a database 23b, an input / output interface 24, an input device 25, a display 26, a sound source unit 28, a GPS sensor 34, a communication control unit 35, and the like. In addition to the navigation device 20, FIG. 1 shows a sensor ECU 10 and a suspension fluctuation detection unit 50 that are connected to the vehicle-mounted LAN 90 via the communication control unit 35. Hereinafter, “database” is expressed as “DB”.

  The navigation device 20 is configured to be able to realize a computer function by a CPU 21, a main memory 22, a road information DB 23a, a reference information DB 23b, an input / output interface 24, an input device 25, a display 26, and the like. It is configured as follows.

  The CPU 21 is a central processing unit that controls the navigation device 20, and is connected to the main memory 22, road information DB 23a, reference information DB 23b, input / output interface 24, etc. via a system bus 29 (configured by an address bus, a data bus, etc.). Connected with. The main memory 22 stores a system program 22a for controlling the CPU 21 and various control programs 22b to 22i. The CPU 21 reads these programs from the main memory 22 and executes them sequentially. The CPU 21 has a built-in clock 21a capable of measuring the current time and date (year / month / day).

  The main memory 22 is a semiconductor storage device connected to the system bus 29, and constitutes a main storage space used by the CPU 21 (ROM, RAM, etc.). The main memory 22 includes a system program 22a, an input program 22b, a route search / route guidance program 22c, various information acquisition programs 22d, a component deterioration detection program 22e, a reference information addition program 22g, a reference information deletion program 22h, Various program data such as the output program 22i and setting data associated therewith are written in advance. It should be noted that the CPU 21 and the main memory 22 include the “location information acquisition unit, dynamic information acquisition unit, reference information acquisition unit, location information comparison determination unit, dynamic information comparison determination unit, degradation information output unit” , Road surface information acquisition means, static information acquisition means, static information comparison judgment means, position information storage means, reference information deletion means ".

  The road information DB 23 a and the reference information DB 23 b are information storage media such as a hard disk, a compact disk, and a digital versatile disk that constitute an auxiliary storage space used by the CPU 21, and are connected to the CPU 21 via the system bus 29. The road information DB 23a stores road information such as route search and route guidance, which will be described later, and map data and road data used for detecting deterioration of vehicle parts. Here, “road data” refers to topography of roads and rivers, road links (numbers, link lengths, link turning angles, gradient values, etc.), nodes (numbers, coordinates, etc.) It refers to various data such as depth (height) and road friction coefficient (hereinafter referred to as “μ”).

  On the other hand, in the reference information DB 23b, reference information that is referred to by a component deterioration detection process described later is stored as a table. For example, as shown in FIG. 2, coordinates, vehicle speed, air pressure, road surface condition, suspension fluctuation amount, acquisition date, etc. are stored in a table that can be managed by address information, and the following (1) to (8) ). The reference information DB 23b can correspond to “reference information storage means” described in the claims. Further, the vehicle speed and the suspension fluctuation amount can correspond to the “dynamic state information” described in the claims, whereas the total weight, the tire pressure, and the road surface state are described in the claims. Some can correspond to “static state information”.

(1) “Address”: For example, in the configuration example shown in FIG. 2, it is address information when “record” to “date of acquisition” are one record.
(2) “Coordinates”: Position coordinate information composed of latitude and longitude acquired by the GPS sensor 34, which will be described later, as position information of a point where the vehicle 100 has traveled.
(3) “Vehicle speed”: obtained by a vehicle speed sensor (not shown) as vehicle speed information (unit: km / h) of the vehicle 100.
(4) “Gross weight”: Total weight information (unit: kg) of the vehicle 100 including the weight of the occupant of the vehicle 100 and the weight of luggage, etc., which is obtained by a weight sensor (not shown).
(5) “Tire pressure”: obtained by a tire pressure sensor (not shown) as tire pressure information (unit: kPa) of the vehicle 100.
(6) “Road surface state”: As the road surface state of the road on which the vehicle 100 has traveled, for example, the depth (height) (unit: mm) of the unevenness of the road surface and μ of the road surface correspond to this. FIG. 2 shows an example of the road surface μ. In this road surface state, as an example of the outer ring surrounding the vehicle 100, road surface unevenness and road surface μ are illustrated, but not limited to this, for example, weather information such as rainfall, snowfall, and temperature is acquired from the outside Means (for example, VICS (Vehicle Information and Communication System)) may be provided to acquire the correction of the road surface μ.
(7) “Suspension fluctuation amount”: The suspension fluctuation width (unit: mm) of the suspension unit mounted on the front and rear wheels of the vehicle 100, which is acquired by the suspension fluctuation detecting unit 50 described later. When the signal waveform itself acquired from the suspension fluctuation detection unit 50 is stored, the address where the waveform data is stored is stored instead of the suspension fluctuation width.
(8) “Acquisition date”: A time stamp that records the date and time (hour, minute, second) when each of the data in (2) to (7) above was acquired and stored in the table. It is acquired by the clock 21a of the CPU 21 described above. An item of reference date may be added to this.

  Each information stored in such a reference information table is registered and added by a component deterioration detection process (S121, 123) by a component deterioration detection program 22e described later.

  The input / output interface 24 is a device that mediates the exchange of data between the input / output devices such as the input device 25, the display 26, the sound source unit 28, the GPS sensor 34, and the communication control unit 35 and the CPU 21, and is connected to the system bus 29. ing.

  The input device 25 is an input device provided on the operation panel of the navigation device 20 and is connected to the system bus 29 via the input / output interface 24. The input device 25 inputs data regarding a destination, a departure place, and the like that the driver or passenger of the vehicle 100 desires to search for a route through the input program 22b.

  The display 26 is a display device that can output the guidance route from the departure point to the destination, the travel information of the route on which the vehicle 100 is currently traveling, and the like via the output program 22i. The display 26 is provided on the operation panel of the navigation device 20. It has been. This display 26 is also connected to the system bus 29 via the input / output interface 24, and is constituted by a liquid crystal display or the like.

  The sound source unit 28 converts a digital signal based on predetermined audio information into an analog signal, and then can generate an audible sound from the speaker via an amplifier by the analog signal. The sound source unit 28 is connected to the system bus 29 via the input / output interface 24. It is connected. As a result, route guidance or the like is output by voice from the speaker and notified to the driver and passengers.

  The GPS sensor 34 is for outputting current position information of the vehicle 100 based on longitude and latitude, and is connected to the system bus 29 via the input / output interface 24. The GPS sensor 34 includes a GPS receiver that receives signals from a plurality of GPS satellites and measures the absolute position of the vehicle 100.

  The communication control unit 35 is a LAN controller that can be connected to an in-vehicle LAN 90 such as a CAN (Controller Area Network) or a LIN (Local Interconnect Network), and is connected to the system bus 29 via the input / output interface 24. Thereby, the data communication between the sensor ECU 10 and the suspension fluctuation detection unit 50 and the CPU 21 is enabled via the in-vehicle LAN 90.

  The sensor ECU 10 connected to the in-vehicle LAN 90 is mainly composed of a sensor unit 12, a control unit 14, and a communication control unit 16, and various sensors (vehicle speed sensor, weight sensor, tire pressure sensor) not shown in the drawings. ) Is provided to the navigation device 20 or the like via the in-vehicle LAN 90.

  Similarly, the suspension fluctuation detection unit 50 connected to the in-vehicle LAN 90 is mainly configured by a sensor unit 52, a control unit 54, and a communication control unit 56. The sensor unit 52 of the suspension fluctuation detection unit 50 includes, for example, a vehicle height sensor, a step sensor, and a laser displacement meter configured to be able to detect the extension amount of the coil spring 134 and the stroke amount of the hydraulic damper 136 that constitute the suspension unit 130. Or a G sensor (acceleration sensor) that can detect acceleration applied to the coil spring 134 and the hydraulic damper 136. Here, the configuration of the suspension unit 130 will be described with reference to FIG.

  As shown in FIG. 3B, the suspension unit 130 mainly includes an upper arm 132, a coil spring 134, a hydraulic damper 136, and a lower arm 138. Each of the upper arm 132 and the lower arm 138 is a wheel support device in which one end is rotatably attached to a vehicle body (not shown) of the vehicle 100 and the other end is attached to a hub member or the like that supports the axle 105. A tire 110 is attached to the axle 105 via a hub member. On the other hand, the coil spring 134 and the hydraulic damper 136 are shock absorbers interposed between the upper arm 132 and the lower arm 138, and can function to absorb vibrations and shocks received from the road surface via the tire 110 as the vehicle 100 travels. Have

  FIG. 3B shows a stabilizer 120 that can suppress the swing of the vehicle 100 in the width direction, and a power cylinder 140 of a power steering device that can assist steering by the driver. Since the tire 110 functions as a steered wheel, the power cylinder 140 is present. However, when the tire 110 functions as a driven wheel, the power cylinder 140 is excluded from such a configuration. Please note that. The tire 110, the axle 105, the stabilizer 120, the suspension unit 130, and the power cylinder 140 described above can all correspond to “vehicle components that can affect vehicle behavior” described in the claims.

  Here, the system program 22a, the input program 22b, the route search / route guidance program 22c, various information acquisition programs 22d, the component deterioration detection program 22e, the suspension deterioration detection program 22f, the reference, and the system program 22a stored in the main memory 22 are stored. An outline of the information addition program 22g, the reference information deletion program 22h, and the output program 22i will be described.

  The system program 22a includes functions performed from the start to the stop of the navigation device 20, that is, a navigation function (FIG. 4), a component deterioration detection function (FIG. 5), a reference information addition function (FIG. 5), and a reference information deletion function ( 7 corresponds to a basic program that controls the memory and also performs a series of memory management operations such as data exchange between programs via the main memory 22.

  The input program 22b allows the driver and other passengers to receive various data necessary for using the navigation function, etc. via the input device 25, as well as data related to the destination where the driver or passengers want route guidance, the departure point, etc. Etc., and has a function of passing to other programs and processes. Further, the input program 22b is configured to output the road information output from the road information DB 23a, the reference information output from the reference information DB 23b, the current position information output from the GPS sensor 34, or the sensor ECU 10 and the suspension fluctuation via the communication control unit 35. It also has a function of transferring various sensor information and the like from the detection unit 50 to other programs and processes.

  The route search / route guidance program 22c has a navigation function that is a basic function of the navigation device 20, searches for a recommended route, etc., and guides the searched route to the driver and passengers. Specifically, a function of searching for a destination input by the input device 25 based on the map data in the road information DB 23a, and a departure point input by the input device 25 or the vehicle detected by the GPS sensor 34 are detected. A function for searching for a route from the current location to the destination based on the road data in the road information DB 23a, and data relating to the searched route (for example, description of the direction of travel such as a right or left turn and road traffic information) are displayed on the display 26 and the sound source unit. And a function of outputting via the H.28.

  The various information acquisition program 22d has a function of acquiring various information from peripheral devices of the CPU 21, and specifically, setting information related to navigation input from the input device 25, road information input from the road information DB 23a. The current position information input from the GPS sensor 34 or various sensor information input from the sensor ECU 10 or the suspension fluctuation detection unit 50 via the communication control unit 35 is acquired. The various information acquisition programs 22d may correspond to “position information acquisition means, dynamic information acquisition means, road surface information acquisition means, static information acquisition means” described in the claims.

  The component deterioration detection program 22e is based on the reference information acquired from the reference information DB 23b and the various sensor information acquired from the sensor ECU 10 and the suspension fluctuation detection unit 50, and the tire 110, the stabilizer 120, the suspension unit 130, and the power cylinder described above. 140 having a function of detecting deterioration of various vehicle parts, such as “position information acquisition means, dynamic information acquisition means, position information comparison determination means, dynamic information comparison determination means, deterioration” described in the claims It can correspond to “information output means, road surface information acquisition means, static information acquisition means, static information comparison and determination means”. Information processing by the component deterioration detection program 22e will be described in detail later with reference to FIG.

  The suspension deterioration detection program 22f is a subprogram constituting a part of the component deterioration detection program 22e, and has a function of detecting deterioration of the suspension unit 130 among various vehicle parts of the vehicle 100. The suspension deterioration detection program 22f may correspond to “dynamic information comparison / determination means, deterioration information output means” described in the claims.

  The reference information addition program 22g is a subprogram that constitutes a part of the component deterioration detection program 22e in the same manner as the suspension deterioration detection program 22f described above, and has a function of adding reference information stored in the reference information DB 23b. . The reference information addition program 22g can correspond to the content of the claims (Claim 3).

  The reference information deletion program 22h has a function of deleting the reference information stored in the reference information DB 23b, and deletes the reference information that satisfies a predetermined condition from the reference information tables stored in the reference information table stored in the reference information DB 23b. To do. Information processing by the reference information deletion program 22h will be described in detail later with reference to FIG.

  The output program 22i has a function of drawing various screen data as a diagram on the display 26 and a function of outputting various guidance data from the speaker by the sound source unit 28. The route guidance information by the route search / route guidance program 22c described above. The suspension deterioration detection program 22f and the like can be notified to the driver and passengers of the vehicle 100 by characters, image diagrams, or synthesized speech.

  Next, the flow of navigation processing executed by the navigation device 20 will be described with reference to FIG. The navigation device 20 is configured such that the main power of the navigation device 20 is turned on in conjunction with the start of the engine of the vehicle 100 (turning on the ignition switch). The process is set to automatically start by the system program 22a.

  As shown in FIG. 4, in the navigation process, an initialization process is first performed in step S10, for example, a predetermined work area is secured in the main memory 22, or various flags are set to initial values. Subsequently, the destination setting process is performed from step S20. In this processing, for example, destination data, priority route data, and the like relating to route search conditions such as a destination and a passing point are input via the input device 25 by the operation of the driver. This process is performed by the input program 22b.

  In the next step S30, route search / route guidance processing is performed. This process is performed by the route search / route guidance program 22c. For example, the shortest distance route from the current position of the vehicle acquired by the GPS sensor 34 to the destination set in step S20 is calculated using the road information. A route search is performed by a search algorithm such as the Dijkstra method based on the map data and road data in the DB 23a. Then, information on the searched route (for example, description of a traveling direction such as a right or left turn) is output as an image displayed on the display 26, a synthesized voice by the sound source unit 28, or the like. This enables route guidance for the driver and passengers.

  When the route guidance in step S30 is completed, a process for determining whether or not there is a request to stop the navigation process is performed in the subsequent step S40. That is, when the vehicle arrives at the destination, the driver usually parks or gets off, so the main power of the navigation device 20 is also cut off when the engine stops at that time. Based on the engine stop (ignition switch off) signal obtained in step S40, it is determined in step S40 whether or not the vehicle has finished traveling, that is, whether or not the navigation process needs to be stopped. .

  If there is a request to stop the navigation process (S40; Yes), the data to be held in the non-volatile semiconductor storage device such as a battery-backed memory device is stored. On the other hand, if there is no request to stop the navigation process (S40; No), the process proceeds to step S20 to perform a process of prompting the driver or the like to input destination information.

  Next, the flow of component deterioration detection processing executed by the navigation device 20 will be described with reference to FIGS. 5 and 6. This process is performed by the parts deterioration detection program 22e, the suspension deterioration detection program 22f, and the reference information addition program 22g, and is automatically started by the system program 22a immediately after the navigation device 20 is started, similar to the navigation process described above. Is done.

  As shown in FIG. 5, in the component deterioration detection process, first, a process of acquiring road surface information is performed in step S101. Specifically, the signal information indicating the suspension fluctuation sent from the suspension fluctuation detection unit 50 is acquired via the communication control unit 35, or the current position information obtained by the GPS sensor 34 and the road stored in the road information DB 23a. Based on the information, the road data on which the vehicle is currently traveling is searched and road surface unevenness information included in the data is acquired. This step S101 can correspond to “road surface information acquisition means” described in the claims.

  In the subsequent step S103, processing for determining whether or not the road surface is uneven is performed. For example, in the case where there is information indicating the presence of unevenness in the road surface unevenness information included in the signal waveform or road data obtained by the suspension fluctuation detection unit 50 acquired in step S101 (S103; Yes), the process proceeds to the next step S105. If there is no indication of the presence of unevenness (S103; No), road surface information is acquired again in step S101. For example, in the case of the signal waveform of the suspension fluctuation detection unit 50, the “indication of the presence of unevenness” is the amplitude of the waveform exceeding a predetermined width, the length of time until convergence to a steady state, or the waveform. It refers to the vibration frequency component included, and in the case of road surface unevenness information included in the road data, it refers to the depth (height) of the unevenness exceeding a predetermined value.

  As described above, in step S103, the processing shifts to the next step S105 in response to the acquisition of such unevenness information, so that the vehicle 100 travels on the road surface with such unevenness by each processing after step S105. It becomes possible to compare and judge the current information (dynamic state information, static state information) of the various traveling systems that change accordingly.

  In the next step S105, processing for acquiring current information of various traveling systems is performed. This process acquires current information on each item (coordinates, vehicle speed, total weight, tire pressure, road surface condition, suspension fluctuation amount) of the reference information table stored in the reference information DB 23b. Is obtained from the GPS sensor 34, vehicle speed information is obtained from the vehicle speed sensor, total weight information is obtained from the weight sensor, tire pressure is obtained from the tire pressure sensor, road surface state is obtained from the road data in the road information DB 23a, and suspension fluctuation amount is obtained from the suspension fluctuation detection unit 50. The vehicle speed and the suspension fluctuation amount can correspond to the “dynamic state information” described in the claims, whereas the total weight, tire pressure, and road surface state are described in the claims. Some can correspond to “static state information”.

  In subsequent step S107, a process of comparing the current information acquired in step S105 with the reference information stored in the reference information DB 23b is performed. Specifically, the current position information acquired by the GPS sensor 34 is compared with the coordinate information in the reference information table of the reference information DB 23b to determine whether or not both pieces of information match, the vehicle speed, the total weight, the tire Also regarding the pressure and road surface condition, the information acquired from each sensor in step S105 is compared with the information in the reference information table of the reference information DB 23b, and it is determined whether or not both pieces of information match. Note that the suspension fluctuation amount is not compared here, but is compared and determined by the processing in step S111. If all of these items (excluding suspension fluctuation amount) match (S107; match), the process proceeds to step S111. If even one item does not match (S107; mismatch), step S121. The process is transferred to. This step S107 can correspond to “positional information comparison / determination means” described in the claims.

  The determination of coincidence / non-coincidence in step S107 may be made on the condition that each numerical value is completely coincident, or may be made on the condition that the value falls within a certain range. For example, in the case of vehicle speed, 40 km / h ± 5 km / h (35 km / h or more and less than 45 km / h), in the case of gross weight, 1000 kg ± 5 kg (995 kg or more and less than 1005 kg), and in the case of tire pressure May set a predetermined width such as 200 kPa ± 5 kPa (195 kPa or more and less than 205 kPa) or the like, and may be determined to be “match” if it falls within this range.

  If it is determined in step S107 that the items match, a process for determining whether the suspension has deteriorated is performed in step S111. Specifically, a process of determining whether or not the suspension fluctuation amount in the reference information table of the reference information DB 23b matches the suspension fluctuation amount of the current information acquired in step S105 is performed. This step S111 can correspond to “dynamic information comparison / determination means” described in the claims.

  For example, as shown in FIG. 6 (A), the signal waveform as reference information stored in the reference information DB 23b is shown in FIG. 6 (B) with respect to the current signal waveform acquired from the suspension fluctuation detecting unit 50. In this case, it is determined whether or not the coil spring 134 and the hydraulic damper 136 of the suspension unit 130 are deteriorated by comparing the maximum amplitudes Wa and Wb of both waveforms and the convergence times Ta and Tb. In the example shown in FIG. 6, the maximum amplitude Wa (> Wb) is larger in the current signal waveform (FIG. 6 (A)) than the signal waveform (FIG. 6 (B)) as the reference information, and the convergence is achieved. Since the time Ta (> Tb) is also large, it is determined that the coil spring 134 or the hydraulic damper 136 is considerably deteriorated.

  As described above, when it is determined in step S111 that the suspension is deteriorated (S111; Yes), the process proceeds to the subsequent step S113, and processing for outputting suspension deterioration information is performed. This process is performed to notify the driver or the like of the deterioration of the suspension unit 130. After creating character information and synthesized voice information indicating that the suspension unit 130 is deteriorated, the character information and the like are displayed. 26 and the sound source unit 28. This step S113 can correspond to “deterioration information output means” described in the claims.

  On the other hand, if it is not determined in step S111 that the suspension is deteriorated (S111; No), there is no information to notify the driver and the like, so step S113 is skipped and a series of main component deterioration detection processes are performed. finish. Note that the processing in steps S111 and S113 described above is performed by the suspension deterioration detection program 22f.

  Incidentally, the deterioration of the suspension not only compares the signal waveform according to the reference information with the current signal waveform, but also, for example, the time Ta required for the amplitudes Wa and Wb to converge to a predetermined value or less based on the current signal waveform, The length of Tb or the frequency component included in the current signal waveform may be analyzed by digital signal processing using a DSP or the like. As a result, for example, when the current signal waveform includes a low-frequency component equal to or lower than a predetermined frequency, a “swell” may occur on the road surface. It is possible to determine whether the two waveforms match or not by removing the components.

  In the present embodiment, as described in the processing of step S107, determination is made by including “static state information” such as total weight, tire pressure, and road surface state in addition to “dynamic state information” such as vehicle speed. Thus, for example, unless the tire pressure as the reference information matches the current tire pressure, the suspension deterioration determination (S111) is not performed. Thereby, including the coincidence of “the static state information of the vehicle that does not change dynamically regardless of the travel of the vehicle and can affect the dynamic state information” such as the total weight and tire pressure of the vehicle 100. By determining, it is possible to accurately grasp the presence or absence of the amount of suspension variation that can be affected by the difference in these static states.

  In step S107 described above, the current information acquired in step S105 is compared with the reference information stored in the reference information DB 23b, and the "dynamic state information" such as the vehicle speed, the total weight, the tire pressure, Although the determination is made including “static state information” such as the road surface state, in this step S107, the position information matches without determining whether the “dynamic state information” or the “static state information” matches or does not match. A configuration may be adopted in which a discrepancy is determined, and in the case of a match, the suspension fluctuation amount is compared and determined in step S111. As a result, it is possible to simplify the information processing as much as it is not determined whether the “dynamic state information” or the “static state information” matches.

  On the other hand, if it is determined in step S107 that even one item does not match (S107; mismatch), a process of determining whether or not the travel distance of the vehicle 100 is equal to or less than a predetermined value is performed in step S121. Specifically, travel distance information sent from a trip meter (not shown) is acquired via the communication control unit 35, and whether or not the travel distance information is a predetermined value (for example, 100 km) or less, that is, the vehicle 100. Is in a state close to that of a new vehicle, and it is determined whether or not there is a low probability that vehicle components of various traveling systems are deteriorated. For this reason, the “travel distance” here means the total distance traveled since the vehicle 100 was delivered to the owner of the vehicle 100 in the state of a new vehicle.

  If it is determined in step S121 that the travel distance is equal to or less than the predetermined value (S121; Yes), a process for adding the current information to the reference information is performed in the next step S123. That is, if the vehicle 100 is in a state close to a new vehicle, it is determined that the current information of the various traveling systems acquired in step S105 can be used as reference information, so the current information is stored in the quasi-information DB 23b. Registered and added (stored) in the reference information table. Specifically, the current information (coordinates, vehicle speed, total weight, tire pressure, road surface condition, suspension fluctuation amount) acquired in step S105 plus the date of acquisition is used as one record, and the free address in the reference information table Register and add (store) to this record. If there is no free address, the record such as the oldest date of acquisition or the oldest reference date is overwritten.

On the other hand, if it is not determined in step S121 that the travel distance is equal to or less than the predetermined value (S121; No), the vehicle 100 is not in a state close to a new vehicle, so the current information acquired in step S105 is the reference information. It is not always possible to use. Therefore, in such a case, the current information is not added to the reference information table of the reference information DB 23b, and the series of parts deterioration detection processing ends. That is, the current information is discarded.
The processes in steps S121 and S123 described above are performed by the reference information addition program 22g.

  Thus, in the navigation device 20 according to the present embodiment, the current position information of the vehicle 100 and the coordinate information of the reference information table stored as the reference information in the reference information DB 23b by the component deterioration detection process by the component deterioration detection program 22e. (Past position information) is compared to determine whether or not the two position information matches, and current information (dynamic state information; “vehicle speed”, static State information; “total weight, tire pressure, road surface state”) and information on various traveling systems (dynamics) in the reference information table stored as reference information in the reference information DB 23b corresponding to the coordinate information (past position information). The vehicle state information; “vehicle speed”, static state information; “total weight, tire pressure, road surface state”) and determine whether or not these pieces of information match (S107). If it is determined that these pieces of information match (S107; match), the “suspension fluctuation amount” acquired corresponding to the current position information and the reference corresponding to this coordinate information (past position information) The "suspension fluctuation amount" in the reference information table stored as reference information in the information DB 23b is compared (S111), and if it is determined that the two fluctuation amounts do not match (S111; Yes), the deterioration of the suspension unit 130 is indicated. The deterioration information is output via the display 26 and the sound source unit 28 (S113).

  In the component deterioration detection process by the above-described component deterioration detection program 22e, the suspension deterioration detection program 22f performs suspension deterioration determination in step S111 and outputs deterioration information of the suspension unit 130 in step S113. Instead of the program 22e, for example, by performing a tire deterioration detection process using a tire deterioration detection program, a component deterioration detection process for the tire 110 can be configured. Similarly, instead of the component deterioration detection program 22e, the stabilizer deterioration detection process is performed by the stabilizer deterioration detection program, so that the component deterioration detection process for the stabilizer 120 or the power steering deterioration detection process is performed by the power steering deterioration detection program. Thus, the component deterioration detection process for the power cylinder 140 can be configured.

  Thus, in order to compare the reference information acquired at the same point with the current information of the traveling system acquired this time, for example, the environmental conditions surrounding the vehicle 100 such as the gradient and the unevenness of the road surface are made the same, and both information is obtained. It becomes possible to determine whether or not they match with each other. Accordingly, the tire 110, the stabilizer 120, and the suspension that can affect the vehicle behavior compared to the case where the current information of the traveling system is acquired and compared under an environmental condition different from the environmental condition in which the reference information to be compared is acquired. Since it is possible to accurately determine whether the unit 130, the power cylinder 140, and the like are deteriorated, it is possible to accurately detect such deterioration.

  Next, the flow of the reference information deletion process executed by the navigation device 20 will be described with reference to FIGS. 3 and 7 to 9. This process is performed by the reference information deletion program 22h, and is automatically activated by the system program 22a immediately after the navigation apparatus 20 is activated, as in the navigation process described above. When the series of processing is completed, the setting is made to be repeatedly executed from the beginning until an engine stop signal is input. This reference information deletion processing is executed in parallel with the above-described component deterioration detection processing (component deterioration detection program 22e).

  As shown in FIG. 7, in the reference information deletion process, first, in step S201, a process for determining whether or not the suspension has deteriorated is performed. Specifically, whether the suspension fluctuation amount in the reference information table of the reference information DB 23b matches the separately obtained suspension fluctuation amount of the current information, as in step S111 by the component deterioration detection process (FIG. 5) described above. Judge whether or not. If the suspension fluctuation amounts coincide with each other, it is determined that the suspension has not deteriorated (S201; No), and the series of reference information deletion processing ends. On the other hand, if it is determined that the suspension fluctuation amounts do not match, the suspension is deteriorated (S201; Yes), and the process proceeds to the subsequent step S203.

  In step 203, a process for registering position information (coordinate information) related to the reference information determined that the suspension has deteriorated in step S201 is performed. This step S203 can correspond to the “location information storage means” described in the claims, and this process facilitates the identification of the deletion target in the deletion process in step S219 described later.

  For example, in the example shown in FIGS. 8 (A) and 3 (A), as shown in the figure, in the section α of the road on which the vehicle 100 travels, there is unevenness x on the road surface. Thus, when the suspension of the vehicle 100 fluctuates, for example, a signal waveform as shown in FIG. Similarly, in the section γ of the road on which the vehicle 100 travels, there is unevenness y on the road surface. Therefore, if the suspension of the vehicle 100 fluctuates due to the unevenness y, for example, a signal as shown in FIG. A waveform is obtained from the suspension fluctuation detection unit 50.

  Here, in the reference information table of the reference information DB 23b, the signal waveforms shown in FIG. 8B when traveling on the unevenness x in the section α are shown in FIG. 8B, and the signal waveforms when traveling on the unevenness y in the section γ are shown in FIG. The items shown in (C) shall be registered.

  In the case where such a signal waveform exists as reference information, when the vehicle 100 subsequently travels in the same section α, for example, if the signal waveform shown in FIG. 9B is obtained by the suspension fluctuation detection unit 50. Since the signal waveform of the reference information (FIG. 8B) and the current signal waveform (FIG. 9B) are greatly different, it is determined that the suspension has deteriorated in the determination process in step S201.

  Then, the process shifts to the subsequent step S203. Therefore, after the process of acquiring road surface information in step S205 is performed in the same manner as steps S101 and S103 in the component deterioration detection process (FIG. 5) described above, the subsequent steps are performed. In S207, a process is performed to determine whether or not there is unevenness on the road surface. In the section β shown in FIG. 8A, since there is no unevenness, it is determined No in step S207, and road surface information is acquired again in step S205. Then, since the unevenness y exists in the section γ, the result is Yes in step S207, and the process of counting up the number of the unevenness is performed in the next step S209.

  In step S211, if normal, a process of counting the normal number is performed. That is, although not shown in detail in FIG. 7, as in step S <b> 201 described above, a process for determining whether or not the suspension has deteriorated is performed, and it is determined that the suspension has not deteriorated. First, the normal number is counted up, and the process proceeds to the subsequent step S213.

  In step S213, it is determined whether or not the unevenness count is greater than or equal to a predetermined value. For example, when the unevenness count is 10 or more (S213; Yes), the process proceeds to the next step S215, and when the unevenness count is not 10 or more (S213; No), the process proceeds to step S205. The process of acquiring road surface information again is performed. That is, once it is determined in step S201 that the suspension has deteriorated (S201; Yes), the processes in steps S205, S207, S209, and S211 are repeatedly performed until the number of irregularities becomes equal to or greater than a predetermined value.

  In the next step S215, processing for calculating the normal ratio is performed. That is, the normal number Nok (Nok / NT) counted in step S211 with respect to the unevenness count number NT, that is, the current information separately acquired for the reference information stored in the reference information DB 23b even if the vehicle 100 travels unevenness. It is determined whether the ratio of the number of times of coincidence for all the information is equal to or greater than a predetermined value. For example, the predetermined value is 90% (0.9).

  Here, in the example shown in FIG. 8, the unevenness is illustrated in one place in each of the sections α and γ. However, assuming that there are eight unshown unevenness in the section β, the predetermined value in step S213 is set to “ 10 ”and the predetermined value in step S217 is“ 90% (0.9) ”. Then, in the sections β and γ, a signal waveform as shown in FIG. 9C is obtained from the suspension fluctuation detecting unit 50, and the current signal waveform (FIG. 9C) is the signal waveform of the reference information ( Compared with FIG. 8 (C)), both waveforms are substantially the same, so that it is judged normal in step S211 and the normal number is counted up. Each processing in steps S205, S207, S209, and S211 is repeatedly performed until the count number reaches a predetermined value “10” or more.

  When it is determined in the determination process in step S213 that the count number is equal to or greater than the predetermined value “10” (S213; Yes), the normal ratio is calculated in the subsequent step S215. In this example, since the unevenness count number NT is 10 and the normal number Nok is 9, 9/10 = 0.9 is calculated as the normal ratio (Nok / NT).

  In the subsequent step S217, a determination process is performed as to whether or not the normal ratio is greater than or equal to a predetermined value. However, since the normal ratio (Nok / NT) = 0.9 is calculated in step S215, the predetermined value in step S217 is determined. “90% (0.9)” is cleared (S217; Yes), and the process proceeds to step S219. That is, although it is determined in step S201 that the suspension has deteriorated once (S201; Yes), there is a larger proportion in which it is not determined that the suspension has deteriorated in the subsequent determination processing. For this reason, it is presumed that the determination in step S201 has been determined as the deterioration of the suspension due to the fact that the unevenness x that should have existed in the past disappeared after that.

  For this reason, in the next step S219, a process of deleting all the reference information registered in the reference information DB 23b for the coordinates of the unevenness x is performed. In the previous example, since the unevenness x (FIG. 8A) that existed in the past has disappeared now (FIG. 9A), all the reference information related to the coordinate information of this point Are deleted from the reference information DB 23b. This step S219 can correspond to “reference information deleting means” described in the claims.

  As described above, in the navigation device 20 according to the present embodiment, the current information (dynamic state information; “vehicle speed,”) of the various traveling systems acquired corresponding to the current position information by deleting the reference information by the reference information deletion program 22h. "Suspension fluctuation amount", static state information; "total weight, tire pressure, road surface state") and various kinds of reference information tables stored as reference information in the reference information DB 23b corresponding to this coordinate information (past position information) The information on the driving system (dynamic state information; “vehicle speed, suspension fluctuation amount”, static state information; “total weight, tire pressure, road surface state”) is compared (S201), and the dynamic state information does not match. If it is determined (S201; Yes), this coordinate information (past position information) is stored, and then, if it is determined that the two dynamic state information matches (S211), predetermined Matter under (S213, S217), deletes the reference information relating to the stored coordinate information from the reference information DB23b (S219). As a result, it becomes possible to update the reference information in response to an external environmental change in which the unevenness x, y existing in the past disappears thereafter. It is possible to prevent false detection accompanying environmental changes. Therefore, since it is possible to more accurately determine whether or not the tire 110, the stabilizer 120, the suspension unit 130, the power cylinder 140, and the like are deteriorated, it is possible to detect these deteriorations more accurately.

  In the above-described embodiment, as the processes shown in FIG. 5 and FIG. 7, the case where there is unevenness at one place on the road surface on which the vehicle 100 travels has been described, but such unevenness exists at a plurality of places. In such a case, it is possible to cope with the unevenness as in the case where the unevenness exists in one place by performing the above-described multiple processing for each unevenness.

It is a block diagram which shows the structural example of the navigation apparatus etc. which concern on one Embodiment of this invention. It is explanatory drawing which shows the structure of the reference | standard information table stored in reference | standard information DB of the navigation apparatus which concerns on this embodiment. FIG. 3 (A) is an explanatory view showing a state where a vehicle equipped with the navigation device according to the present embodiment is traveling on an uneven road surface, and FIG. 3 (B) is a configuration of a suspension unit and the like of the vehicle. It is explanatory drawing which shows an example. It is a flowchart which shows the flow of the navigation process by the navigation apparatus concerning this embodiment. It is a flowchart which shows the flow of the component deterioration detection process by the navigation apparatus which concerns on this embodiment. FIG. 6A shows an example of the current signal waveform, and FIG. 6B shows an example of the signal waveform of the reference information. It is a flowchart which shows the flow of the reference | standard information deletion process by the navigation apparatus which concerns on this embodiment. FIG. 8 (A) is an explanatory view showing an example of a road on which a vehicle equipped with the navigation device according to the present embodiment travels (the road surface of section α and section γ has irregularities), and FIG. FIG. 8C shows an example of a signal waveform from the suspension fluctuation detection unit when traveling in the section γ, and FIG. 8C shows an example of a signal waveform from the suspension fluctuation detection section when traveling in the section γ. FIG. 9 (A) is an explanatory view showing an example of a road on which a vehicle equipped with the navigation device according to this embodiment travels (the road surface of section γ has irregularities), and FIG. 9 (B) shows section α. FIG. 9C shows an example of a signal waveform from the suspension fluctuation detection unit when the vehicle travels in the section γ.

Explanation of symbols

10 ... Sensor ECU
20. Navigation device (vehicle component deterioration detection device)
21 ... CPU (position information acquisition means, dynamic information acquisition means, reference information acquisition means, position information comparison determination means, dynamic information comparison determination means, deterioration information output means, road surface information acquisition means, static information acquisition means, static information acquisition means (Comparative information comparison and judgment means, position information storage means, reference information deletion means)
22 ... Main memory (position information acquisition means, dynamic information acquisition means, reference information acquisition means, position information comparison determination means, dynamic information comparison determination means, deterioration information output means, road surface information acquisition means, static information acquisition means, Static information comparison judgment means, position information storage means, reference information deletion means)
22a ... System program 22c ... Route search / route guidance program 22d ... Various information acquisition programs (position information acquisition means, dynamic information acquisition means, road surface information acquisition means, static information acquisition means)
22e... Part deterioration detection program (position information acquisition means, dynamic information acquisition means, position information comparison determination means, dynamic information comparison determination means, deterioration information output means, road surface information acquisition means, static information acquisition means, static information Comparison judgment means)
22f ... Suspension deterioration detection program (dynamic information comparison / determination means, deterioration information output means)
22g ... reference information addition program 22h ... reference information deletion program (position information storage means, reference information deletion means)
22i ... Output program (deterioration information output means)
23a ... Road information DB
23b ... Reference information DB (reference information storage means)
26 ... Display (deterioration information output means)
28 ... Sound source unit (deterioration information output means)
34 ... GPS sensor (position information acquisition means)
35 ... Communication control unit 50 ... Suspension fluctuation detection unit 90 ... In-vehicle LAN
100 ... vehicle 105 ... axle (vehicle parts)
110 ... Tire (vehicle parts)
120 ... Stabilizer (vehicle parts)
130 ... Suspension unit (vehicle parts)
132 ... Upper arm (vehicle parts)
134 ... Coil spring (vehicle parts)
136 ... Hydraulic damper (vehicle parts)
138 ... Lower arm (vehicle parts)
140 ... Power cylinder (vehicle parts)
x, y ... uneven

Claims (4)

A vehicle component deterioration detection device for detecting deterioration of a suspension unit of a vehicle,
Position information acquisition means for acquiring position information of a point where the vehicle travels;
Dynamic information acquisition means for acquiring, in correspondence with the position information, dynamic state information of the vehicle that can change dynamically as the vehicle travels;
The past position information already acquired by the position information acquisition unit and the past dynamic state information acquired by the dynamic information acquisition unit corresponding to the past position information as reference information. Reference information storage means for storing;
The current position information acquired this time by the position information acquisition means is compared with the past position information stored as the reference information in the reference information storage means, and whether or not both position information matches. Position information comparison and determination means for determining;
When it is determined by the position information comparison and determination means that the two position information matches, the current dynamic state information acquired by the dynamic information acquisition means corresponding to the current position information and the past information Dynamic information comparison for comparing the past dynamic state information stored as the reference information in the reference information storage means corresponding to the position information to determine whether or not the two dynamic state information matches Judgment means,
A deterioration information output means for outputting deterioration information indicating deterioration of the suspension unit when the dynamic information comparison and determination means determines that the dynamic state information does not match;
If the dynamic information comparison and determination means determines that the dynamic state information does not match, the position information storage means for storing the position information of the point;
After the location information of the point is stored by the location information storage means, when the dynamic information comparison and determination means determines that the dynamic state information matches, it is determined whether or not there is unevenness on the road surface. If the unevenness is present, the number of the unevenness is counted up and whether the suspension unit is deteriorated is determined. If it is determined that the unevenness is not deteriorated, the normal number is determined as normal. counts up, when the number of present is determined to Ru der than a predetermined value, to calculate the normal rate by dividing the normal number by the number present, the normal rate is equal to or greater than a predetermined value, the Reference information deleting means for deleting, from the reference information storage means, the reference information related to the position information of the point stored by the position information storage means;
A vehicle component deterioration detection apparatus comprising: Road surface information acquisition means for acquiring unevenness information of the road surface of the point where the vehicle has traveled,
The position information comparison / determination unit determines whether or not the two pieces of position information match when the road surface unevenness information acquired by the road surface information acquisition unit exists for the point. Item 1. The vehicle component deterioration detection device according to Item 1.   If the position information comparison / determination unit does not determine that the two pieces of position information match, the reference information storage unit corresponds to the current position information and the current position information. 3. The current dynamic state information acquired by the method is stored as the past position information and the past dynamic state information constituting the reference information. Vehicle parts deterioration detection device. Static information acquisition means for acquiring what can affect the dynamic state information among the static state information of the vehicle that does not change dynamically regardless of the traveling of the vehicle, the reference information storage means, In addition to the past position information and the past dynamic state information, the past static state information acquired in the past by the static information acquisition unit corresponding to the past position information. The vehicle component deterioration detection device according to any one of claims 1 to 3, wherein the vehicle component deterioration detection device is stored as the reference information.
If it is determined by the position information comparison and determination means that the two position information matches, the current static state information acquired by the static information acquisition means corresponding to the current position information and the past information Static information comparison / determination means for comparing the past static state information stored in the reference information storage means corresponding to position information and determining whether or not both static state information matches. ,
The deterioration information output means is determined by the dynamic information comparison determination means that the dynamic state information does not match, and the static information comparison determination means determines that the static state information matches. In the case, the vehicle component deterioration detection device outputs the deterioration information.

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