JP6853562B2 - Digital tachograph and operation management system - Google Patents

Description

The present invention relates to a digital tachograph and an operation management system.

In general, public roads are managed by the national and local governments as well as incorporated administrative agencies, and all vehicles share the same public roads. In order for all vehicles to drive safely on public roads, public roads must be maintained at all times. Conventionally, information on public roads (road surface conditions, etc .: "public road data") is collected visually or by dedicated equipment when a dedicated vehicle actually travels on the public road. This collected public road data is extremely important in road management, and necessary restoration work, etc. is carried out based on the public road data, and the safety of public roads is maintained.

By the way, buses and trucks traveling on public roads are required by law to be equipped with an operation recorder. The operation recorder records operation data such as vehicle speed and rotation speed based on speed pulses and rotation pulses. The operation data is recorded in the vehicle by being recorded on a chart paper or stored in a recording medium such as a memory card. Alternatively, the operation data is transmitted to the management server outside the vehicle and stored in the management server. A type in which operation data is transmitted to a management server is constructed as an operation management system (see, for example, Patent Document 1). In the operation management system, a management server centrally manages a plurality of operation data transmitted from a plurality of vehicles.

Japanese Unexamined Patent Publication No. 6-68390

As mentioned above, collecting public road data is generally difficult and very costly because it relies on measurement by running a dedicated vehicle. On the other hand, many vehicles such as buses and trucks are always on public roads. Therefore, the inventor of the present application wondered if these vehicles and operation management systems could be useful for collecting public road data. That is, the inventor of the present application has obtained the finding that if the vehicle can be used as an observatory, information such as road conditions and weather conditions in various places can be obtained in real time.

The present invention has been made based on this background, and an object of the present invention is to provide a digital tachograph mounted on a vehicle and capable of collecting public road data and the like in real time and an operation management system using the same. is there.

(1) The digital tachograph according to the present invention includes a vehicle speed information input unit for inputting vehicle speed information, a position information input unit for inputting position information, a vibration information input unit for inputting vibration information, and at least a vehicle. A storage unit that stores an identification symbol that can identify the type, a first correction value or a first correction formula associated with the identification symbol, and a second correction value or a second correction formula associated with the vehicle speed. It includes an output unit that outputs information to the outside, and a control unit that outputs the vehicle speed information, the position information, the vibration information, and the identification symbol from the output unit. The control unit corrects the vibration information using the vehicle speed information, the first correction value or the first correction formula, and the second correction value or the second correction formula , and the corrected vibration information is output to the output unit. Output from.

Vehicle speed information, position information, and identification symbols are used for vehicle operation management. The position information and the vibration information are used for managing the road surface condition of the road.

The magnitude of vehicle vibration is affected by vehicle speed. Specifically, the faster the vehicle speed, the greater the vibration. The control unit corrects the vibration information from the vehicle speed information. For example, the control unit corrects the vibration information so that the vibration information is the same regardless of the vehicle speed when traveling on a road with the same road surface condition.

The magnitude of vehicle vibration is affected by the vehicle type. This vehicle type includes the size and weight of the vehicle body, the performance of the damper, and the like. The vehicle type corresponds to the identification symbol. The control unit corrects the vibration information from the identification symbol corresponding to the vehicle type. For example, the control unit corrects the vibration information so that the vibration information is the same regardless of the vehicle type traveling on the road with the same road surface condition.

(2) The control unit may correct the vibration information by adding or subtracting the first correction value and the second correction value to the vibration information .

(3) The control unit may determine the road surface condition from the vibration information.

The control unit determines the road surface condition from the vibration information, and outputs the determined road surface condition together with the vibration information or as vibration information from the output unit.

(4) The digital tachograph may further include an environmental sensor. The environmental sensor has at least one of a first detection unit that detects atmospheric pressure, a second detection unit that detects temperature, and a third detection unit that detects humidity. The control unit outputs the environmental information output by the environmental sensor from the output unit.

The output location information and environmental information are used for meteorological condition management and meteorological prediction.

(5) The operation management system according to the present invention includes a vehicle speed information input unit for inputting vehicle speed information, a position information input unit for inputting position information, a vibration information input unit for inputting vibration information, and at least a vehicle. A storage unit that stores an identification symbol that can identify the type of the vehicle, an output unit that outputs information to the outside, and a control that outputs the vehicle speed information, the position information, the vibration information, and the identification symbol from the output unit. A device memory that stores a digital tachograph including a unit, a first correction value or a first correction formula associated with the identification symbol, and a second correction value or a second correction formula associated with a vehicle speed. It is provided with a server having the information. The server acquires the vehicle speed information, the position information, the vibration information, and the identification symbol transmitted by the digital tachograph, and uses the acquired vibration information as the first correction value or the first correction formula and the first correction formula. It is corrected using the two correction values or the second correction formula, and the corrected vibration information is associated with the position information and stored in the device memory as road surface management information.

Vehicle operation management is performed based on the operation management information. For example, it is confirmed whether the vehicle has traveled to the destination through the scheduled operation route or whether the vehicle has taken a break at the scheduled operation resting place.

In addition, the road surface condition of the road is managed by the road surface management information. For example, each road is divided into a plurality of areas, and information on the road surface condition can be obtained for each area.

The magnitude of vehicle vibration is affected by vehicle speed. Specifically, the faster the vehicle speed, the greater the vibration. The server corrects the vibration information from the vehicle speed information. For example, the server corrects the vibration information so that the vibration information is the same regardless of the vehicle speed when traveling on a road having the same road surface condition.

The magnitude of vehicle vibration is affected by the vehicle type. This vehicle type includes the size and weight of the vehicle body, the performance of the damper, and the like. The vehicle type corresponds to the identification symbol. The server corrects the vibration information from the identification symbol corresponding to the vehicle type. For example, the server corrects the vibration information so that the vibration information is the same regardless of the vehicle type traveling on the road with the same road surface condition.

(6) The server may correct the vibration information by adding or subtracting the first correction value and the second correction value to the vibration information.

(7) The memory may store the vehicle speed information and the position information in association with the identification symbol as operation management information.

(8) The server may determine the road surface condition of the road from the vibration information, and store the determination value in the device memory in association with the position information.

The server determines the road surface condition of the road from the vibration information, and stores the determined value together with the vibration information or as vibration information in the device memory.

(9) The digital tachograph includes an environmental sensor having at least one of a first detection unit that detects atmospheric pressure, a second detection unit that detects temperature, and a third detection unit that detects humidity. You may also have more. The control unit outputs the environmental information input from the environmental sensor from the output unit. The server associates the location information with the environment information and stores it in the device memory.

The location information and environmental information stored in the device memory are used for meteorological condition management and meteorological prediction.

(10) The server generates altitude information from the atmospheric pressure information detected by the first detection unit and output by the digital tachograph and the original atmospheric pressure information separately input, and generates the altitude information and the position information. Correspondingly, it may be stored in the above-mentioned device memory.

The original atmospheric pressure information is the atmospheric pressure information announced by the Japan Meteorological Agency and the like. The server generates elevation information from the barometric pressure information and the original barometric pressure information sent from the digital tachograph. The altitude information indicates the altitude at which the vehicle is located. Since the altitude information is generated from the atmospheric pressure information, the generated altitude information is more accurate than the altitude indicated by the GPS (Global Positioning System). That is, the altitude of each point can be obtained with higher accuracy than GPS.

According to the present invention, public road data and the like can be collected in real time.

FIG. 1 is a configuration diagram of the operation management system 10. FIG. 2 is a functional block diagram of the digital tachograph 11. FIG. 3 is a functional block diagram of the server 12. FIG. 4 is a configuration diagram of the environment sensor 35. FIG. 5 is a diagram showing a first correction table 71. FIG. 6 is a diagram showing a second correction table 72. FIG. 7 is a diagram showing a corresponding table 73. FIG. 8 is a functional block diagram of the server 12 in the modified example.

Hereinafter, embodiments of the present invention will be described. It goes without saying that the embodiments described below are merely examples of the present invention, and the embodiments of the present invention can be appropriately changed without changing the gist of the present invention.

In this embodiment, the operation management system 10 shown in FIG. 1 will be described. The operation management system 10 includes a digital tachograph 11 mounted on the vehicle 20 and a server 12 that manages the operation of the vehicle 20 and collects public road data and weather data based on the information sent from the digital tachograph 11. The vehicle 20 includes all vehicles such as buses, trucks, and ordinary vehicles.

The vehicle 20 includes an antenna 21. The vehicle 20 receives and transmits the position information from the communication satellite 13 by the antenna 21. That is, the antenna 21 is a transmitting / receiving antenna. However, the vehicle 20 may separately include a transmitting antenna and a receiving antenna.

The vehicle 20 includes a battery 22. The battery 22 supplies power to the digital tachograph 11 and also supplies power for transmission from the antenna 21.

As shown in FIG. 2, the vehicle 20 includes a vehicle speed sensor 23 and a rotation speed sensor 24. The vehicle speed sensor 23 outputs vehicle speed information indicating the vehicle speed of the vehicle 20. The rotation speed sensor 24 outputs rotation speed information indicating the rotation speed of an engine (not shown) of the vehicle 20.

The vehicle 20 includes a vibration sensor 25. As the vibration sensor 25, a three-axis acceleration sensor using a piezoelectric element or the like is used. The vibration sensor 25 also includes a gyro sensor. The vibration sensor 25 outputs acceleration information (vibration information). As the vibration sensor 25, an acceleration sensor or a gyro sensor incorporated in the attitude control device mounted on the vehicle 20 may be diverted.

The digital tachograph 11 is mounted on the vehicle 20. The digital tachograph 11 includes an interface unit 30 and a CPU unit 40. The interface unit 30 and the CPU unit 40 are realized by a pattern circuit board (not shown), a resistor mounted on the pattern circuit board, a diode, an IC (Integrated Circuit), or the like. The interface unit 30 and the CPU unit 40 are electrically connected by a power cable or a connection cable. In the present embodiment, an example in which the digital tachograph 11 is divided into the interface unit 30 and the CPU unit 40 and connected by a cable will be described, but the interface unit 30 and the CPU unit 40 may be integrated. ..

The interface unit 30 includes a vehicle speed information input unit 31, a rotation speed information input unit 32, a position information input unit 33, a vibration information input unit 34, an environment sensor 35, a clock module 36, an interface circuit 37, and a power supply. It includes an input unit 38 and a power supply circuit 39.

The power input unit 38 is electrically connected to the battery 22 mounted on the vehicle 20 by using a cable, a lead wire, or the like. The power supply circuit 39 is electrically connected to the power supply input unit 38 by a pattern on the circuit board. That is, a DC voltage is supplied to the power supply circuit 39 from the battery 22. The power supply circuit 39 is a circuit that converts an input DC voltage into a stable predetermined constant voltage and outputs it. The power supply circuit 39 is composed of a DC-DC converter, a regulator, and the like, and outputs a DC voltage of 5V or 3.3V. Each circuit described later is driven by the DC voltage output by the power supply circuit 39. In FIG. 2, the power supply line from the power supply circuit 39 to each circuit is not shown in order to avoid complication.

The vehicle speed information input unit 31 is electrically connected to the vehicle speed sensor 23 mounted on the vehicle 20 by using a cable, a lead wire, or the like. The vehicle speed information input unit 31 inputs vehicle speed information from the vehicle speed sensor 23. The vehicle speed information input unit 31 is electrically connected to the interface circuit 37 by a pattern on the circuit board.

The rotation speed information input unit 32 is electrically connected to the rotation speed sensor 24 mounted on the vehicle 20 by using a cable, a lead wire, or the like. The rotation speed information input unit 32 inputs rotation speed information from the rotation speed sensor 24. The rotation speed information input unit 32 is electrically connected to the interface circuit 37 by a pattern on the circuit board.

The position information input unit 33 is electrically connected to the antenna 21 included in the vehicle 20 by using a cable, a lead wire, or the like. The position information input unit 33 inputs position information from the communication satellite 13 (FIG. 1) via the antenna 21. The position information input unit 33 is electrically connected to the interface circuit 37 by a pattern on the circuit board.

The vibration information input unit 34 is electrically connected to the vibration sensor 25 mounted on the vehicle 20 by using a cable, a lead wire, or the like. The vibration information input unit 34 inputs vibration information from the vibration sensor 25. The vibration information input unit 34 is electrically connected to the interface circuit 37 by a pattern on the circuit board.

As shown in FIG. 4, the environment sensor 35 includes an atmospheric pressure sensor 61 (first detection unit) for detecting atmospheric pressure, a temperature sensor 62 (second detection unit) for detecting temperature, and a humidity sensor 63 for detecting humidity. (Third detection unit) and a gas sensor 64 (fourth detection unit) for detecting the presence / absence and concentration of a predetermined component in the air are provided. The gas sensor 64 detects, for example, volatile organic compounds, alcohol, carbon dioxide, etc. contained in the air inside the vehicle. For the environment sensor 35, for example, BME680 manufactured by BOSCH (trademark) can be used. The environment sensor 35 is electrically connected to the interface circuit 37 by a pattern on the circuit board.

The clock module 36 is an IC that outputs time information. For example, DS3231 of MAXIM INTERGRATED ™ can be used as the clock module 36. The clock module 36 is electrically connected to the interface circuit 37 by a pattern on the circuit board.

The interface circuit 37 is a circuit that converts an input signal into a signal that can be input to the CPU 41. Although one interface circuit 37 is shown in FIG. 2 in order to avoid complicating the drawings, the interface circuit 37 is composed of a plurality of interface circuits provided according to an input signal. Specifically, the interface circuit 37 includes a plurality of interface circuits such as an interface circuit for waveform-shaping the pulse signal input from the vehicle speed sensor 23 and an interface circuit for waveform-shaping the pulse signal input from the rotation speed sensor 24. The interface circuit 37 is electrically connected to the CPU unit 40 by a circuit board pattern and a connection cable.

The CPU unit 40 includes a CPU (Central Processing Unit) 41, a storage unit 42, and an output unit 43.

The CPU 41 is an arithmetic processing unit that performs arithmetic processing. For example, Raspberry Pi 2 (RASPBERRY Pi2) manufactured by Acorn (trademark) is used as the CPU 41 and the storage unit 42. The CPU 41 calculates the vehicle speed and the rotation speed from the vehicle speed information and the rotation speed information input from the vehicle speed sensor 23 and the rotation speed sensor 24. This "calculation" includes a calculation by a calculation formula stored in the storage unit 42 and a determination by a table stored in the storage unit 42. In this table, for example, the vehicle speed and the rotation speed corresponding to the pulse interval of the signal are stored in association with each other. The CPU 41 corresponds to the control unit.

Further, the CPU 41 corrects the vibration information input from the vibration sensor 25 by using the first correction table 71 and the second correction table 72 stored in the storage unit 42. Details will be described later.

Further, the CPU 41 writes and reads from the storage unit 42 and outputs from the output unit 43. Specifically, the CPU 41 writes the calculated vehicle speed and rotation speed and the input position information, time information, vibration information, and environmental information to the storage unit 42, and the storage unit 42 writes these information and the identification ID. Is read and output from the output unit 43. In the following, the calculated vehicle speed / rotation speed, position information, time information, environmental information, and identification ID are collectively referred to as operation management information, and the position information, vibration information, and identification symbol are collectively referred to as road surface management information. There are times.

The storage unit 42 is a memory capable of writing and reading information. The storage unit 42 is an EEPROM, a RAM, a ROM, or the like. The storage unit 42 stores the identification ID. The storage unit 42 stores the identification ID in a read-only memory such as a ROM. The identification ID is assigned to each digital tachograph 11. The identification ID includes, for example, a vehicle type identification part that identifies a vehicle type and the like, and an individual identification part that identifies an individual. In the example of "A001" shown in FIG. 3, "A" corresponds to the vehicle type identification portion and "001" corresponds to the individual identification portion. However, it goes without saying that the specific example of the identification ID is not limited to the example of FIG. The identification ID corresponds to an identification symbol.

The storage unit 42 stores the first correction table 71 shown in FIG. 5 and the second correction table 72 shown in FIG. 6 in a ROM or the like. The first correction table 71 is a correction table for determining a correction value for correcting vibration information from the vehicle speed. More specifically, even if the road surface condition is the same, the higher the speed of the vehicle 20, the larger the vibration tends to be. Therefore, in order to determine the road surface condition of the road from the vibration information, it is necessary to revise the vibration information downward as the speed of the vehicle 20 increases. The first correction table 71 is a table for determining a correction value for correcting vibration information. In addition, although FIG. 5 shows an example of correcting “-1” every time the speed of the vehicle 20 increases by 10 km / hour, the correction value is not limited to the example shown in FIG. Needless to say.

The second correction table 72 is a correction table for determining a correction value for correcting vibration information from an identification ID (vehicle model). Specifically, even if the road surface condition is the same, the input vibration information differs depending on the vehicle type (size, weight, damper performance, etc.). Therefore, in order to determine the road surface condition from the vibration information, it is necessary to correct the vibration information according to the vehicle type. The second correction table 72 is a table for determining a correction value for correcting vibration information depending on the vehicle type. Needless to say, the correction values "-1" to "-6" shown in FIG. 6 are examples, and the correction values are not limited to the example shown in FIG.

The CPU 41 corrects the vibration information by using the correction values determined by the first correction table 71 and the second correction table 72. For example, when the correction value determined by the first correction table 71 is "-1" and the correction value determined by the second correction table 72 is "-2", the CPU 41 is "3" from the vibration information. Is subtracted, and the value calculated by the subtraction is used as the corrected vibration information. The CPU 41 stores the corrected vibration information in the storage unit 42. Further, the CPU 41 outputs vehicle speed information, rotation speed information, position information, time information, environmental information, vibration information, and identification ID from the output unit 43.

The output unit 43 is electrically connected to the antenna 21 shown in FIG. 2 by using a cable, a lead wire, or the like. The information output from the output unit 43 is transmitted to the outside via the antenna 21. The information transmitted from the antenna 21 is acquired by the server 12 by mobile communication, the Internet, or the like. Since mobile communication and the Internet are known, detailed description thereof will be omitted.

The server 12 shown in FIG. 3 is installed in a company office or the like, is connected to a communication network such as a telephone line or the Internet, and acquires operation management information and road surface management information from the vehicle 20.

The server 12 includes management software 51 and device memory 52. The device memory 52 may be built in the server 12 or externally attached to the server 12.

The device memory 52 stores the corresponding table 73 shown in FIG. The correspondence table 73 is a table showing the correspondence between the identification ID assigned to the digital tachograph 11 and the vehicle body information. The vehicle body information includes the vehicle body number, vehicle type, purchase date, vehicle inspection date, and the like. The server 12 identifies the vehicle body from the identification ID using the corresponding table 73.

Further, the device memory 52 is stored by dividing each information by the management software 51. Specifically, as shown in FIG. 3, the management software 51 stores vehicle speed information, rotation speed information, position information, environmental information, and time information as operation management information in the device memory 52 for each identification ID. .. The operation management information confirms which vehicle 20 travels at what speed and where, and when it arrives at the resting place or destination. That is, the operation management information is used for the operation management of the vehicle 20. Information other than vehicle speed information, rotation speed information, position information, environmental information, and time information may be used as operation management information.

On the other hand, the management software 51 stores the vibration information and the identification ID in the device memory 52 as road surface management information for each position information. Further, the management software 51 determines the road surface condition from the vibration information. For example, the management software 51 calculates an average value of a plurality of vibration information and determines the level of the average value. Further, the management software 51 determines that the road surface condition is good "A" when the vibration value in the vibration information is small, and determines the road surface condition in five stages of "A" to "E". For example, the judgment "E" is the level at which the road needs to be repaired. The above-mentioned determination of the road surface condition in the management software 51 is an example, and other determination methods may be used.

By storing vibration information for each position information, the state of each road can be confirmed in real time. That is, the collected vibration information of each road is public road data that can be used for road management. The collected vibration information (road surface information) is handed over to, for example, the Ministry of Land, Infrastructure, Transport and Tourism, local public organizations, and incorporated administrative agencies. Alternatively, a 3D road map that visually confirms the road surface condition may be created from the collected vibration information.

Further, the management software 51 stores the environmental information in the device memory 52 for each position information. By storing environmental information for each location information, the atmospheric pressure, temperature, and humidity in each area can be confirmed in real time. The collected environmental information is handed over to, for example, the Japan Meteorological Agency.

Hereinafter, the operation of the operation management system 10 will be described with reference to an example in which information is transmitted from the vehicle 20 having the identification ID “A001”. Vehicle 20 travels on National Highway A. The “area” shown in FIG. 3 is, for example, an area in which National Highway A is divided at 5M intervals. That is, each position of the national highway A is specified by using the area number.

"A001" is stored as an identification ID in the storage unit 42 of the digital tachograph 11 mounted on the vehicle 20. When the vehicle 20 travels, the digital tachograph 11 acquires position information, time information, speed information, rotation speed information, vibration information, and environmental information.

The digital tachograph 11 stores each acquired information in the storage unit 42. Further, the digital tachograph 11 corrects the vibration information by using the first correction table 71 and the second correction table 72. The corrected vibration information is stored in the storage unit 42.

The digital tachograph 11 associates the position information, the time information, the speed, the rotation speed, the vibration information, and the environmental information stored in the storage unit 42 with the identification ID “A001”, and sets a predetermined time interval (for example, 0. Output in 05 seconds). The output information is transmitted from the antenna 21 and acquired by the server 12 via the Internet or the like. The above-mentioned time interval is determined by, for example, the count number of the timer counter that counts the wave number of the clock frequency of the CPU 61.

The server 12 stores the acquired speed, rotation speed, position information, and time information as operation management information in the device memory 52 for each identification ID. The operation management information stored in the device memory 52 is used for the operation management of the vehicle 20. For example, it is confirmed by the operation management information whether the vehicle 20 arrives at the resting place or the destination on time, or whether the vehicle 20 travels on the scheduled route.

Further, the server 12 determines the road surface condition from the acquired vibration information. The server 12 stores the acquired vibration information and the determined road surface condition in the device memory 52. In the example shown in FIG. 3, the road surface condition of the 111th area of the national highway A is determined to be "A" and stored in the device memory 52, and the road surface condition of the 31st area of the national highway A is determined to be "B". And stored in the device memory 52. The vibration information and the judgment value of the road surface condition stored in the device memory 52 are handed over to the Ministry of Land, Infrastructure, Transport and Tourism, local public bodies, and incorporated administrative agencies, and are used for road management.

Further, the server 12 stores the acquired environmental information (atmospheric pressure information, temperature information, humidity information) in the device memory 52 for each position information. The environmental information stored in the device memory 52 is handed over to the Japan Meteorological Agency, for example, and is used for creating a detailed weather map and predicting a guerrilla rainstorm.

In the present embodiment, since the vehicle speed, the number of rotations, the position information, the time information, and the identification ID are output from the digital tachograph 11, the operation management of the vehicle 20 can be performed on the server 12.

Further, since the position information, the vibration information, and the identification ID are output from the digital tachograph 11, the server 12 can manage the road surface condition of the road.

Further, since the location information and the environmental information are output from the digital tachograph 11, the server 12 can manage the weather condition.

Further, since the vibration information is corrected according to the vehicle speed, the same vibration information (road surface information) can be obtained under the same road surface condition regardless of the vehicle speed.

Further, since the vibration information is corrected by the identification ID, the same vibration information (road surface information) can be obtained under the same road surface condition regardless of the vehicle type.

In the above-described embodiment, an example in which the vibration information is corrected using the correction tables 71 and 72 has been described. However, the vibration information may be corrected without using the correction table. For example, the correction calculation formula may be stored in the storage unit 42. In the case of the first-order correction, the vibration information is reduced in proportion to the speed. The calculation formula of the correction may be quadratic or cubic.

[Modification example]

In this modification, an example in which altitude information is generated from the barometric pressure information output by the barometric pressure sensor 61 will be described.

Original atmospheric pressure information indicating the atmospheric pressure at each position is input to the server 12. The original atmospheric pressure information is information issued by the Japan Meteorological Agency and the like. The server 12 generates altitude information of each position from the difference between the original atmospheric pressure information and the atmospheric pressure information of each position. A table stored in the device memory 52 and a calculation formula stored in the device memory 52 are used to generate the altitude information. As shown in FIG. 8, the server 12 stores the generated altitude information in association with the position information in the device memory 52.

The altitude information generated in this way indicates the altitude with higher accuracy than the altitude indicated by GPS. That is, the altitude of each area of the road on which the vehicle 20 has passed can be acquired with high accuracy.

In the above-described embodiment, an example in which the vibration information is corrected in the digital tachograph 11 has been described. The vibration information may be corrected by the server 12. That is, the management software 51 of the server 12 corrects the vibration information by using the first correction table 71 and the second correction table 72 stored in the device memory 52 and the above-mentioned correction calculation formula. The management software 51 uses the vehicle model identification portion (“A”, “B”, etc.) of the identification ID when performing correction by the second correction table 72.

Further, in the above-described embodiment, an example in which the server 12 determines the road surface condition from the vibration information has been described. However, the determination of the road surface condition may be performed by the digital tachograph 11. That is, a table and a calculation formula for making a determination are stored in the storage unit 42 of the digital tachograph 11, and the CPU 41 determines the road surface state using the table and the calculation formula.

In the above-described embodiment, an example in which the vibration sensor 25 is mounted on the vehicle 20 has been described. However, the vibration sensor 25 may be mounted on the digital tachograph 11. In this case, the interface circuit 37 to which the vibration information from the vibration sensor 25 is input corresponds to the vibration information input unit.

10 ... Operation management system 11 ... Digital tachograph 12 ... Server 25 ... Vibration sensor 31 ... Vehicle speed information input unit 33 ... Position information input unit 34 ... Vibration information input unit 35 ...・ ・ Environmental sensor 36 ・ ・ ・ Clock module 41 ・ ・ ・ CPU (control unit)
42 ... Storage unit 43 ... Output unit 51 ... Management software 52 ... Device memory 61 ... Barometric pressure sensor (first detection unit)
62 ... Temperature sensor (second detector)
63 ... Humidity sensor (3rd detector)
71 ... 1st correction table 72 ... 2nd correction table 73 ... Corresponding table

Claims (10)

Vehicle speed information input unit where vehicle speed information is input, and
The location information input section where location information is input and
Vibration information input section where vibration information is input, and
A memory that stores at least an identification symbol that can identify the type of vehicle, a first correction value or first correction formula associated with the identification symbol, and a second correction value or second correction formula associated with vehicle speed. Department and
An output unit that outputs information to the outside and
A control unit that outputs the vehicle speed information, the position information, the vibration information, and the identification symbol from the output unit is provided.
The control unit corrects the vibration information using the vehicle speed information, the first correction value or the first correction formula, and the second correction value or the second correction formula , and the corrected vibration information is output to the output unit. Digital tachograph output from. The digital tachograph according to claim 1, wherein the control unit adds or subtracts the first correction value and the second correction value to the vibration information to correct the vibration information. The digital tachograph according to claim 1 or 2, wherein the control unit determines a road surface condition from the vibration information. An environmental sensor having at least one of a first detection unit for detecting atmospheric pressure, a second detection unit for detecting temperature, and a third detection unit for detecting humidity is further provided.
The digital tachograph according to any one of claims 1 to 3, wherein the control unit outputs the environmental information output by the environmental sensor from the output unit. A vehicle speed information input unit for inputting vehicle speed information, a position information input unit for inputting position information, a vibration information input unit for inputting vibration information, and at least an identification symbol that can identify the type of vehicle are stored. A digital tachograph including a storage unit, an output unit that outputs information to the outside, and a control unit that outputs the vehicle speed information, the position information, the vibration information, and the identification symbol from the output unit.
A server having a device memory for storing the first correction value or the first correction formula associated with the identification symbol and the second correction value or the second correction formula associated with the vehicle speed is provided.
The above server
Acquire the vehicle speed information, the position information, the vibration information, and the identification symbol transmitted by the digital tachograph.
The acquired vibration information is corrected by using the first correction value or the first correction formula and the second correction value or the second correction formula.
An operation management system that associates the corrected vibration information with the position information and stores it in the device memory as road surface management information. The operation management system according to claim 5, wherein the server corrects the vibration information by adding or subtracting the first correction value and the second correction value to the vibration information. The above device memory
The operation management system according to claim 5 or 6 , wherein the identification symbol is associated with the vehicle speed information and the position information and stored as operation management information. The above server
The operation management system according to any one of claims 5 to 7 , wherein the road surface condition of the road is determined from the vibration information, and the determined value is associated with the position information and stored in the device memory. The digital tachograph further includes an environmental sensor having at least one of a first detection unit for detecting atmospheric pressure, a second detection unit for detecting temperature, and a third detection unit for detecting humidity.
The control unit outputs the environmental information input from the environmental sensor from the output unit.
The operation management system according to any one of claims 5 to 8 , wherein the server associates the location information with the environment information and stores the environment information in the device memory. The server generates altitude information from the atmospheric pressure information detected by the first detection unit and output by the digital tachograph and the original atmospheric pressure information separately input, and associates the altitude information with the position information. The operation management system according to claim 9 , which is stored in the device memory.

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