JP2021082185A - Speed data acquisition device, service providing system and speed data acquisition method - Google Patents

Abstract

To provide a speed data acquisition device capable of acquiring accurate speed data.SOLUTION: A digital tachograph acquires CAN speed data or Pulse speed data based on output of a vehicle speed sensor mounted on a vehicle as speed data A (step S5), acquires GPS speed data based on GPS data (step S7), and determines correctness of the speed data A (steps S8 and S9). The digital tachograph acquires the GPS speed data in place of the speed data A as speed data of the vehicle (step S10) when the speed data A is an error.SELECTED DRAWING: Figure 2

Description

The present invention relates to a speed data acquisition device, a service providing system, and a speed data acquisition method.

On-board units such as digital tachographs acquire speed data, engine rotation data, accelerator opening data, and the like from various sensors mounted on the vehicle. The on-board unit transmits the acquired data to a rear system such as a server, and the rear system uses the received data to provide various services such as daily operation report, dynamic management, and various alarms to the customer. The method of acquiring the speed data of the vehicle is fixed to any one of CAN input, pulse input, and GPS input by setting according to the specifications of the vehicle. In CAN input, speed data input via CAN (Controller Area Network) communication is acquired. In the pulse input, speed data based on the pulse signal input from the vehicle speed sensor is acquired. In the GPS input, the speed data calculated based on the GPS data transmitted from the GPS satellite is acquired. As an example of a technique using pulse signals and GPS data, a device for calculating and correcting a distance coefficient value for obtaining a mileage has been proposed (see, for example, Patent Documents 1 and 2).

Japanese Unexamined Patent Publication No. 2003-322544 Japanese Unexamined Patent Publication No. 8-292040

The speed data acquired by the on-board unit may include abnormal values due to factors such as defective sensor parts and vehicle noise. In this case, the various services provided by the rear system are based on abnormal values, and cannot provide service information such as accurate dynamic management.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a speed data acquisition device capable of acquiring accurate speed data. Another object of the present invention is to provide accurate service information regarding vehicle operation management based on accurate speed data.

In order to achieve the above-mentioned object, the speed data acquisition device, the service providing system, and the speed data acquisition method according to the present invention are characterized by the following (1) to (7).
(1) A speed data acquisition device that acquires vehicle speed data.
The first acquisition unit that acquires the vehicle speed based on the output of the vehicle speed sensor mounted on the vehicle as the first vehicle speed, and
GPS receiver that receives GPS data and
A second acquisition unit that acquires the vehicle speed based on the GPS data as the second vehicle speed,
The correctness of the first vehicle speed is determined, and if the first vehicle speed is correct, the first vehicle speed is acquired as the speed data, and if the first vehicle speed is incorrect, the second vehicle speed is obtained. A speed data acquisition device, comprising: a control unit for acquiring the speed data.
(2) The speed data acquisition device according to (1) above, wherein the control unit determines whether the first vehicle speed is correct or incorrect when the GPS data satisfies a predetermined condition.
(3) The control unit determines that the first vehicle speed is incorrect when the difference between the first vehicle speed and the second vehicle speed is equal to or greater than a predetermined value (1). The speed data acquisition device according to 1) or (2).
(4) The first acquisition unit is a vehicle speed data calculated based on a pulse signal from the vehicle speed sensor, or a vehicle acquired from an ECU (Electronic Control Unit) mounted on the vehicle via an in-vehicle network. The speed data acquisition device according to any one of (1) to (3) above, wherein the speed data is acquired as the first vehicle speed.
(5) The speed data acquisition according to any one of (1) to (4) above, which comprises a transmission unit for transmitting the acquired first vehicle speed or the second vehicle speed as the speed data. apparatus.
(6) An on-board unit having the speed data acquisition device described in (5) above, mounted on the vehicle, and collecting operation data of the vehicle.
A server that can communicate with the on-board unit, receives the operation data from the on-board unit, and provides a service related to operation management of the vehicle.
A management device capable of communicating with the server is provided.
The on-board unit includes the first vehicle speed when the first vehicle speed is correct, and the second vehicle speed when the first vehicle speed is incorrect in the operation data as the speed data. , Send to the server,
The server generates information on the operation management of the vehicle based on the operation data received from the vehicle-mounted device, and transmits the information to the management device.
The management device is a service providing system characterized by receiving the information.
(7) A speed data acquisition method for acquiring vehicle speed data.
The vehicle speed based on the output of the vehicle speed sensor mounted on the vehicle is acquired as the first vehicle speed, and the vehicle speed is acquired.
The GPS data is received, and the vehicle speed based on the GPS data is acquired as the second vehicle speed.
The correctness of the first vehicle speed is determined, and if the first vehicle speed is correct, the first vehicle speed is acquired as the speed data, and if the first vehicle speed is incorrect, the second vehicle speed is obtained. A speed data acquisition method, characterized in that the speed data is acquired as the speed data.

According to the speed data acquisition device and the speed data acquisition method having the above (1) and (7) configurations, the correctness of the first vehicle speed is determined based on the output of the vehicle speed sensor, and when the first vehicle speed is incorrect. Uses the second vehicle speed based on GPS data as the speed data instead of the first vehicle speed. As a result, when the first vehicle speed is incorrect due to factors such as defective sensor parts and vehicle noise, it is possible to prevent acquisition of an abnormal value as speed data and acquire accurate speed data. Therefore, in the rear system (server) that provides various operation services (dynamic management, various warnings, etc.) using speed data, more accurate service provision can be performed by using accurate speed data with outliers eliminated. It will be possible.

According to the speed data acquisition device having the configuration of (2) above, when the GPS data satisfies a predetermined condition, the correctness of the first vehicle speed is determined, so that the reliability of the GPS data can be ensured. Therefore, it is possible to prevent the adoption of the unreliable second vehicle speed.

According to the speed data acquisition device having the configuration of (3) above, when the difference between the first vehicle speed and the second vehicle speed is larger than usual (for example, within 5 km / h) (for example, 10 km / h or more). In addition, it is judged that the first vehicle speed is incorrect. In this way, since the correctness is determined by comparing the first vehicle speed and the second vehicle speed, abnormal data can be eliminated with a simple configuration without requiring other inputs.

According to the speed data acquisition device having the configuration of (4) above, highly reliable speed data that can be directly acquired from the vehicle rather than GPS speed data can be usually adopted. In addition, if an abnormal value appears in the first vehicle speed due to noise or the like, it can be eliminated and the second vehicle speed that is continuous with the accurate first vehicle speed can be adopted, so accurate speed data can be acquired. it can.

According to the speed data acquisition device having the configuration of (5) above, by transmitting the acquired speed data to the rear system or the like, it is possible to provide an accurate operation management service using the correct speed data in the rear system or the like.

According to the service providing system having the configuration of (6) above, abnormal data indicating an erroneous vehicle speed is excluded from the operation data transmitted from the vehicle-mounted device to the server. As a result, the server can provide the management device with more accurate service information (dynamic management, various alarms, etc.) using accurate operation data (speed data).

According to the present invention, accurate velocity data can be obtained. In addition, it is possible to provide accurate service information regarding vehicle operation management based on accurate speed data.

The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through the embodiments described below (hereinafter referred to as "embodiments") with reference to the accompanying drawings. ..

FIG. 1 is a diagram showing a configuration of a service providing system of the present embodiment. FIG. 2 is a flowchart showing an operation example when the digital tachograph of the present embodiment acquires speed data. FIG. 3 is a flowchart showing an example of calculation processing of GPS speed data by the digital tachograph of the present embodiment.

Specific embodiments of the present invention will be described below with reference to the respective figures. In the present embodiment, an example in which the speed data acquisition device of the present invention is configured as a digital tachograph (vehicle-mounted device) mounted on a vehicle such as a truck will be described, and a service based on the operation data collected by the digital tachograph will be provided. An example of a service providing system to be used will be described.

FIG. 1 is a diagram showing a configuration of the service providing system 5 of the present embodiment. The service providing system 5 provides a service based on the operation data collected by the digital tachograph mounted on the vehicle, and is introduced by a business operator such as a transportation company or a bus company. In the present embodiment, the service providing system 5 includes an operation recording device (having a speed data acquisition device; hereinafter referred to as a digital tachograph) 10, a server 60, and an office PC 30 (management device) via a network 70. It has a configuration to be connected. The digital tachograph 10 is mounted on a truck vehicle (hereinafter, simply referred to as "vehicle") managed by a transportation company. The server 60 is installed in the service providing company, generates service information related to vehicle operation management, and provides it to the office PC 30. The office PC30 is installed in the office of the transportation company. The digital tachograph 10 and the office PC may be connected via a network. Further, the office PC may be configured to read a memory card that records the operation record data measured by the on-board unit. Further, the on-board unit may be a drive recorder or the like.

The office PC 30 is composed of a general-purpose computer device and manages the operation status of the vehicle. The network 70 is a packet communication network such as the Internet to which a radio base station 8 and a server 60 that perform wide area communication with the digital tachograph 10 are connected, and relays data communication performed between the digital tachograph 10 and the server 60. Communication between the digital tachograph 10 and the wireless base station 8 may be performed by a mobile communication network (mobile line network) such as LTE (Long Term Evolution) / 4G (4th Generation), or a wireless LAN (Local Area). Network) may be used.

The digital tachograph 10 is mounted on the vehicle and records operation data such as entry / exit time, mileage, running time, running speed, accelerator opening, speed over, engine speed over, sudden start, sudden acceleration, and sudden deceleration. .. The digital tachograph 10 functions as a speed data acquisition device that acquires vehicle speed data and provides it to the server 60 or the office PC 30. The digital tachograph 10 includes a CPU 11 (first acquisition unit, second acquisition unit, control unit), non-volatile memory 26A, volatile memory 26B, recording unit 17, card I / F18, voice I / F19, RTC (clock IC) 21, It has a SW input unit 22 and a display unit 27.

The CPU 11 comprehensively controls each part of the digital tachograph 10. The non-volatile memory 26A stores an operation program or the like executed by the CPU 11. The volatile memory 26B is used to temporarily hold various data.

The recording unit 17 records data such as operation data and video in a predetermined storage area. A memory card 65 owned by the driver is freely inserted and removed from the card I / F18. The CPU 11 writes the operation information (including data such as operation data and images) and warning events recorded by the recording unit 17 to the memory card 65 connected to the card I / F18. A built-in speaker 20 is connected to the voice I / F19. The built-in speaker 20 emits a sound such as an alarm.

The RTC21 (timekeeping unit) measures the current time. ON / OFF signals of various buttons such as a warehousing button and a warehousing button are input to the SW input unit 22. The display unit 27 is composed of an LCD (liquid crystal display) and displays not only communication and operation status but also alarms and the like.

Further, the digital tachograph 10 includes speed I / F12A, engine rotation I / F12B, external input I / F13, sensor input I / F14, CAN input I / F29, GPS receiving unit 15, camera I / F16, power supply unit 25, and the like. It has a communication unit 24.

A vehicle speed sensor 51 that detects the speed of the vehicle is connected to the speed I / F 12A, and a speed pulse (vehicle speed pulse) from the vehicle speed sensor 51 is input. The vehicle speed sensor 51 may be provided as an option on the digital tachograph 10, or may be provided as a device separate from the digital tachograph 10. Based on the vehicle speed pulse input to the speed I / F12A, the CPU 11 (first acquisition unit) calculates (acquires) the vehicle speed (Pulse speed data).

A rotation pulse from an engine rotation speed sensor (not shown) is input to the engine rotation I / F12B. An external device (not shown) such as an accelerator opening sensor is connected to the external input I / F13.

An acceleration sensor (G sensor) 28 that detects an acceleration (G value) including a lateral acceleration (lateral G) generated at right angles to the traveling direction (sensing an impact) is connected to the sensor input I / F14, and is connected to the G sensor. The signal from 28 is input. The G sensor 28 can detect the magnitude (lateral G) of the acceleration applied in the left-right direction (vehicle width direction) of the own vehicle.

A signal (CAN signal) transmitted from the vehicle's ECU (Electronic Control Unit) via CAN (Controller Area Network) communication, which is an in-vehicle network, is input to the CAN input I / F29. The CAN signal includes vehicle speed data (CAN speed data, first vehicle speed) acquired from a vehicle speed sensor mounted on the vehicle. This vehicle speed may be calculated based on the output of the vehicle speed sensor 51, or may be calculated based on the output of another sensor mounted on the vehicle.

The CPU 11 detects various operating states based on the information input via these I / Fs.

The GPS receiving unit 15 is connected to the GPS antenna 15a, receives signals (GPS data) transmitted from GPS satellites, and acquires current position information (latitude / longitude data). The GPS receiving unit 15 also acquires information indicating the reliability of GPS data. From the GPS data received by the GPS receiving unit 15, the CPU 11 can collect vehicle speed data and mileage data.

A camera 23 is connected to the camera I / F16. The camera 23 is installed in the vehicle and captures the periphery (for example, the front) of the vehicle to acquire image data. The camera 23 has at least one image sensor in which, for example, 300,000 pixels, 1 million pixels, and 2 million pixels are arranged on the imaging surface, and can capture an image such as a stereo image. The image sensor may be composed of a CMOS (complementary metal oxide semiconductor) sensor or a CCD (charge-coupled device) sensor. Further, the camera I / F16 may be connected to a camera that is fixed in front of the meter in the vehicle, on the ceiling of the vehicle, etc., and captures the entire inside of the vehicle (inside the vehicle), or images of the sides and the rear of the vehicle. A camera for shooting may be connected. In addition to capturing visible light, the camera may be equipped with an infrared camera so that it can capture images even at night.

When the communication unit 24 performs wide area communication and is connected to the wireless base station 8 via the mobile network (mobile communication network), the server 60 and the office work are performed via the network 70 such as the Internet connected to the wireless base station 8. Communicates with PC30. The power supply unit 25 supplies electric power to each unit of the digital tachograph 10 by turning on the ignition switch or the like.

In the present embodiment, the CPU 11 acquires the vehicle speed (first vehicle speed) based on the output of the vehicle speed sensor 51, and acquires the vehicle speed (second vehicle speed) based on the GPS data. The CPU 11 determines whether the first vehicle speed is correct or incorrect, and acquires the first vehicle speed when the first vehicle speed is correct and the second vehicle speed when the first vehicle speed is incorrect as speed data. Have the recording unit 17 record. The CPU 11 includes the recorded speed data (first vehicle speed or second vehicle speed) in the operation data, and transmits the recorded speed data (first vehicle speed or second vehicle speed) to the server 60 by the communication unit 24. The CPU 11 determines whether the first vehicle speed is correct or incorrect when the GPS data satisfies a predetermined condition. When the difference between the first vehicle speed and the second vehicle speed is a predetermined value or more (for example, 10 km / h or more), the CPU 11 determines that the first vehicle speed is incorrect.

The server 60 is a rear system that uses the operation data collected by the digital tachograph 10 to provide various services related to vehicle operation management to customers (office PC30) such as a transportation company. The server 60 generates and provides, for example, service information related to daily operation reports, dynamic management, and various warnings (speed over, continuous running time, etc.). The server 60 has a CPU 61, a communication unit 62, and a storage unit 63. The communication unit 62 communicates with the digital tachograph 10 and the office PC 30 via the network 70. The storage unit 63 is a memory that can store various types of data, and stores operation data transmitted from the digital tachograph 10. The CPU 61 comprehensively controls each part of the server 60, generates service information related to vehicle operation management based on the operation data received from the digital tachograph 10, and transmits the service information to the office PC 30.

The office PC 30 is a PC that operates on a general-purpose operating system, and functions as a management device that manages the operation of the vehicle. The office PC 30 has a CPU 31, a communication unit 32, a display unit 33, a storage unit 34, a card I / F 35, an operation unit 36, an output unit 37, a voice I / F 38, and an external I / F 48.

The CPU 31 comprehensively controls each part of the office PC 30. The communication unit 32 can communicate with the server 60 and the digital tachograph 10 via the network 70, and receives the service information transmitted from the server 60. Further, the communication unit 32 can also connect to various databases (not shown) connected to the network 70, and can acquire necessary data.

The display unit 33 displays the service information and the like received from the server 60. The storage unit 34 stores the service information received from the server 60, a driving evaluation program for evaluating the driving of the driver of the vehicle, and the like.

A memory card 65 is freely inserted and removed from the card I / F35. The card I / F35 inputs the operation data measured by the digital tachograph 10 and stored in the memory card 65. The operation unit 36 has a keyboard, a mouse, and the like, and accepts operations by the administrator of the office PC 30. The output unit 37 outputs various data. A microphone 41 and a speaker 42 are connected to the voice I / F 38. The administrator can also make a voice call with the driver of the vehicle using the microphone 41 and the speaker 42.

An external storage device (not shown) such as an operation data database (DB) and a hazard map database (DB) can be connected to the external I / F48. In the operation data DB, various event information including sudden acceleration / deceleration, sudden steering, speed over, engine speed over, as well as entry / exit time, speed, mileage, etc. are recorded as operation data. In the hazard map DB, map data in which a mark indicating a point (accident point) where an accident occurred in the past is superimposed on the map is registered. In this hazard map, areas where disasters such as natural disasters are expected, evacuation sites, etc. may be described.

Next, with reference to FIGS. 2 and 3, an operation example when the digital tachograph 10 acquires speed data will be described. FIG. 2 is a flowchart showing an operation example when the digital tachograph 10 acquires speed data, and FIG. 3 is a flowchart showing an example of arithmetic processing of GPS speed data by the digital tachograph 10. The CPU 11 of the digital tachograph 10 repeatedly executes the processes shown in FIGS. 2 and 3 while the vehicle is in operation, for example, at 1-second intervals.

As shown in FIG. 2, the digital tachograph 10 determines which of the three types of data acquisition settings predetermined by the vehicle specifications is (step S1). That is, in the digital tachograph 10, the data acquisition setting is the acquisition of the speed data (CAN speed data) included in the CAN signal, the acquisition of the speed data (Pulse speed data) calculated based on the vehicle speed pulse, and the GPS speed data described later. To determine which is the acquisition of. The digital tachograph 10 acquires and stores any one of the CAN speed data, the Pulse speed data, and the GPS speed data described later according to the determination result (steps S2, S3, S4).

Here, the calculation process of the GPS speed data will be described with reference to FIG. Upon receiving the GPS data, the digital tachograph 10 acquires and stores the latitude / longitude data of the current position of the vehicle (step S21). The digital tachograph 10 determines the reliability of GPS data according to whether or not the current position of the vehicle can be calculated (positioning), that is, whether or not the latitude / longitude data can be acquired in step S21. (Step S22).

The digital tachograph 10 returns to the process of step S21 when positioning is not possible (positioning is NG in step S22), and proceeds to the process of step S23 when positioning is possible (positioning is OK in step S22). In step S23, the digital tachograph 10 determines the presence / absence of GPS data (latitude / longitude data) one second ago (previous), and if there is none, that is, if the GPS data could not be received last time, step S21. Return to. If present in step S23, the digital tachograph 10 calculates and stores the difference between the current (current) latitude / longitude and the previous latitude / longitude (step S24).

Next, the digital tachograph 10 calculates the moving distance of the vehicle from the calculated difference between latitude and longitude (step S25), further calculates the speed from the moving distance, and stores it as the GPS speed (step S26). In this way, the digital tachograph 10 can acquire the GPS speed (second vehicle speed) when the GPS data (latitude / longitude data) can be acquired both last time and this time.

Returning to FIG. 2, the digital tachograph 10 sets any one of the CAN speed data, the Pulse speed data, and the GPS speed data as the speed data A according to the processing of steps S2 to S4 (step S5).

On the other hand, the digital tachograph 10 acquires GPS data (latitude / longitude data) (step S6) and acquires GPS speed data (step S6) as described with reference to FIG. 3, separately from the calculation of the speed data A (step S6). Step S7). If GPS data (latitude / longitude data) or GPS speed data cannot be acquired in steps S6 and S7, the digital tachograph 10 does not store GPS data (latitude / longitude data) or GPS speed data, or cannot be calculated. You may remember that.

The digital tachograph 10 compares the speed data A acquired from the vehicle with the GPS speed data (step S8). In step S8, the digital tachograph 10 determines whether or not there is a difference of 10 km / h or more between the speed data A and the GPS speed data, so that the speed data A is correct or incorrect, that is, the speed data A is an abnormal value. Judge whether it is not. If the GPS speed data of this time is not available, the digital tachograph 10 does not perform the determination in step S8 and exits the flow shown in FIG.

The digital tachograph 10 adopts GPS speed data and stores it as vehicle speed data when there is a difference of 10 km / h or more, that is, when the speed data A is determined to be incorrect (S10). On the other hand, the digital tachograph 10 adopts the speed data A and stores it as the speed data of the vehicle when there is no difference of 10 km / h or more, that is, when it is determined that the speed data A is correct (S11).

Here, the reason why the difference between the speed data A and the GPS speed data is 10 km / h or more as the criterion for judging the correctness of the speed data A will be described. In general, the reliability of speed data is highest in CAN speed data, and decreases in the order of Pulse speed data and GPS speed data. GPS velocity data may have an error of several kilometers. On the other hand, in the service provided by the server 60, the warning threshold value for sudden start / sudden acceleration is 11 km / h or more. Taking these factors into consideration, the reliability of speed data requires a speed of 10 kilometers per hour. Therefore, the correctness judgment criterion of the speed data A is that the difference from the GPS speed data is 10 km / h or more.

Returning to FIG. 2, in steps S10 and S11, the vehicle speed data is stored in, for example, the volatile memory 26B, included in the operation data, and transmitted to the server 60.

The server 60 uses the operation data received from the digital tachograph 10 to generate service information related to vehicle operation management and transmits it to the office PC 30. Further, the office PC 30 receives the service information from the server 60.

As described above, according to the digital tachograph 10 of the present embodiment, the correctness of the speed data A (first vehicle speed) is determined, and if the speed data A is incorrect, the GPS speed data is replaced with the speed data A. (Second vehicle speed) is adopted as speed data. As a result, when the speed data A acquired from the vehicle is incorrect due to factors such as defective sensor parts and vehicle noise, it is possible to prevent acquisition of an abnormal value as the speed data and acquire accurate speed data. Therefore, in the server 60 (rear system) that provides various services (dynamic management, various alarms, etc.) using speed data, it is possible to provide more accurate services by using accurate speed data in which abnormal values are eliminated. Become.

Further, the digital tachograph 10 determines the correctness of the speed data A when the GPS data satisfies a predetermined condition, that is, when the GPS data (latitude / longitude data) can be acquired twice in succession. As described above, on the condition that the reliability of the GPS data can be ensured, it is possible to prevent the adoption of the GPS speed data having low reliability.

Further, the digital tachograph 10 states that the speed data A is incorrect when the difference between the speed data A and the GPS speed data is larger than usual (for example, within 5 km / h) (for example, 10 km / h or more). to decide. In this way, since the correctness is determined by comparing the speed data A with the GPS speed data, abnormal data can be eliminated with a simple configuration without requiring other inputs.

The present invention is not limited to the above-described embodiment, and can be appropriately modified, improved, and the like. In addition, the material, shape, size, numerical value, form, number, arrangement location, etc. of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved. For example, in the above-described embodiment, in step S10 of FIG. 2, the vehicle speed data is stored in the volatile memory 26B and transmitted to the server 60, but the vehicle speed data may be stored in the memory card 65. Further, the operation data such as the speed data stored in the memory card may be read by the office PC 30 and used for the operation management.

In the above-described embodiment, the difference between the speed data A and the GPS speed data is set to be 10 km / h or more as a criterion for determining whether the speed data A is correct or incorrect, but the criterion is not limited to this. For example, the difference between the speed data A and the GPS speed data may be 10% or less of the speed data A as a criterion, or this ratio may be variable according to the speed.

Here, the features of the speed data acquisition device, the service providing system, and the speed data acquisition method according to the above-described embodiment of the present invention are briefly summarized below [1] to [7], respectively.
[1] A speed data acquisition device (digital tachograph 10) that acquires vehicle speed data.
The first acquisition unit (speed I / F12A, CPU11, CPU11, which acquires the vehicle speed based on the output of the vehicle speed sensor (51) mounted on the vehicle as the first vehicle speed (CAN speed data, Pulse speed data, speed data A). Step S5) and
A GPS receiver (15, step S21) that receives GPS data,
The second acquisition unit (CPU11, steps S7, S26) that acquires the vehicle speed based on the GPS data as the second vehicle speed, and
The correctness of the first vehicle speed is determined (steps S8 and S9), and if the first vehicle speed is correct, the first vehicle speed is acquired as the speed data (step S11), and the first vehicle speed is determined. In the case of an error, the control unit (CPU11) that acquires the second vehicle speed as the speed data (step S10)
A speed data acquisition device (digital tachograph 10).
[2] The control unit determines whether the first vehicle speed is correct or incorrect when the GPS data satisfies a predetermined condition (steps S22 and S23).
The speed data acquisition device according to the above [1].
[3] When the difference between the first vehicle speed and the second vehicle speed is equal to or greater than a predetermined value, the control unit determines that the first vehicle speed is incorrect (step S9).
The speed data acquisition device according to the above [1] or [2].
[4] The first acquisition unit obtains vehicle speed data based on a pulse signal from the vehicle speed sensor or vehicle speed data acquired from an ECU (Electronic Control Unit) mounted on the vehicle via an in-vehicle network. Acquired as the first vehicle speed (steps S2, S3, S5)
The speed data acquisition device according to any one of the above [1] to [3].
[5] Any one of the above [1] to [4], which comprises a transmission unit (communication unit 24) for transmitting the acquired first vehicle speed or the second vehicle speed as the speed data. The speed data acquisition device described.
[6] An on-board unit (digital tachograph 10) having the speed data acquisition device according to the above [5], mounted on the vehicle, and collecting operation data of the vehicle.
A server (60) capable of communicating with the vehicle-mounted device, receiving the operation data from the vehicle-mounted device, and providing a service related to the operation management of the vehicle.
A management device (office PC) capable of communicating with the server is provided.
The on-board unit includes the first vehicle speed when the first vehicle speed is correct, and the second vehicle speed when the first vehicle speed is incorrect in the operation data as the speed data. , Sent to the server (steps S10, S11),
The server generates information on the operation management of the vehicle based on the operation data received from the vehicle-mounted device, and transmits the information to the management device.
The management device is a service providing system characterized by receiving the information.
[7] A speed data acquisition method for acquiring vehicle speed data.
The vehicle speed based on the output of the vehicle speed sensor mounted on the vehicle is acquired as the first vehicle speed (step S5).
Upon receiving the GPS data (step S21), the vehicle speed based on the GPS data is acquired as the second vehicle speed (steps S7 and S26).
The correctness of the first vehicle speed is determined (steps S8 and S9), and if the first vehicle speed is correct, the first vehicle speed is acquired as the speed data (step S11), and the first vehicle speed is determined. In the case of an error, the second vehicle speed is acquired as the speed data (step S10).
A speed data acquisition method characterized by the fact that.

5 Service provision system 10 Digital tachograph 11 CPU (1st acquisition unit, 2nd acquisition unit, control unit)
12A Speed I / F
13 External input I / F
15 GPS receiver 15a GPS antenna 24 Communication unit 30 Office PC (management device)
29 CAN input I / F
51 Vehicle speed sensor 60 server

Claims (7)

It is a speed data acquisition device that acquires vehicle speed data.
The first acquisition unit that acquires the vehicle speed based on the output of the vehicle speed sensor mounted on the vehicle as the first vehicle speed, and
GPS receiver that receives GPS data and
A second acquisition unit that acquires the vehicle speed based on the GPS data as the second vehicle speed,
The correctness of the first vehicle speed is determined, and if the first vehicle speed is correct, the first vehicle speed is acquired as the speed data, and if the first vehicle speed is incorrect, the second vehicle speed is obtained. A speed data acquisition device, comprising: a control unit for acquiring the speed data. The speed data acquisition device according to claim 1, wherein the control unit determines whether the first vehicle speed is correct or incorrect when the GPS data satisfies a predetermined condition. Claim 1 or 2 characterized in that the control unit determines that the first vehicle speed is incorrect when the difference between the first vehicle speed and the second vehicle speed is equal to or greater than a predetermined value. The speed data acquisition device described in. The first acquisition unit obtains vehicle speed data calculated based on a pulse signal from the vehicle speed sensor or vehicle speed data acquired from an ECU (Electronic Control Unit) mounted on the vehicle via an in-vehicle network. The speed data acquisition device according to any one of claims 1 to 3, wherein the speed data acquisition device is acquired as the first vehicle speed. The speed data acquisition device according to any one of claims 1 to 4, further comprising a transmission unit that transmits the acquired first vehicle speed or the second vehicle speed as the speed data. An on-board unit having the speed data acquisition device according to claim 5, which is mounted on the vehicle and collects operation data of the vehicle.
A server that can communicate with the on-board unit, receives the operation data from the on-board unit, and provides a service related to operation management of the vehicle.
A management device capable of communicating with the server is provided.
The on-board unit includes the first vehicle speed when the first vehicle speed is correct, and the second vehicle speed when the first vehicle speed is incorrect in the operation data as the speed data. , Send to the server,
The server generates information on the operation management of the vehicle based on the operation data received from the vehicle-mounted device, and transmits the information to the management device.
The management device is a service providing system characterized by receiving the information. It is a speed data acquisition method for acquiring vehicle speed data.
The vehicle speed based on the output of the vehicle speed sensor mounted on the vehicle is acquired as the first vehicle speed, and the vehicle speed is acquired.
The GPS data is received, and the vehicle speed based on the GPS data is acquired as the second vehicle speed.
The correctness of the first vehicle speed is determined, and if the first vehicle speed is correct, the first vehicle speed is acquired as the speed data, and if the first vehicle speed is incorrect, the second vehicle speed is obtained. A speed data acquisition method, characterized in that the speed data is acquired as the speed data.

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