JPH06333116A - Vehicle operation information collecting analysing system and method and device for generating running distance time series data - Google Patents

Abstract

PURPOSE:To provide the vehicle operation information collecting analysing system and the method and device for generating running distance time series data in which an inexpensive storage medium to record distance data with a small storage capacity is used. CONSTITUTION:A 1st arithmetic operation means 51a-2 obtains a partial sum of optional speed data for a predetermined time when distance data are written or optional speed data for a predetermined distance. A 2nd arithmetic operation means 51a-3 obtains the total sum being sum of all speed data for a predetermined time or for a predetermined distance. A 3rd arithmetic operation means 51a-4 generates distance time series data corresponding to speed data by multiplying a running distance for a predetermined time or a predetermined distance with a value obtained by dividing the partial sum with the total sum.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention collects vehicle operation information in the form of digital data, including vehicle speed and mileage information that changes from moment to moment, and analyzes the collected digital data. The present invention relates to an analysis system, and more particularly to a travel distance time series data creation method and apparatus for creating time series data regarding travel distance.

[0002]

2. Description of the Related Art This type of vehicle operation information collection / analysis system is mounted on a vehicle and monitors the time-varying speed and mileage, and converts the signals obtained by this monitoring into digital data. An in-vehicle device that is generally called a digital tachograph for recording on a recording medium such as a memory card, and an office that manages the vehicle are arranged to read the digital data in the recording medium recorded by the in-vehicle device and read the read digital data. An analyzing device for analyzing and collecting vehicle operation information necessary for vehicle management is configured as shown in FIG.

In the figure, reference numeral 1 is a rotation sensor for inputting a rotation corresponding to the rotation speed of an axle from a transmission 2 of a vehicle, converting the rotation into a pulse signal having a frequency proportional to the rotation speed, and outputting the pulse signal. This is an on-vehicle device that samples and inputs a pulse signal from the sensor 1, calculates an instantaneous speed and a traveled distance, performs a predetermined data compression process, and records the data. An IC memory card 4, which is a portable recording medium, can be removably attached to the vehicle-mounted device 3. By mounting the IC memory card 4 on the in-vehicle apparatus 3, the speed, distance and the like are recorded in the form of digital data.

Further, in the figure, reference numeral 5 is an analysis device installed in an office or the like that manages the operation of the vehicle. To this analysis device 5, the IC memory card 4 removed from the vehicle-mounted device 3 should be mounted. The digital data is read from the IC memory card 4 and saved in a recording medium such as a floppy disk, and vehicle operation information obtained by analyzing the saved digital data is collected as well as printed or displayed. For recording data, initialization of the IC memory card 4 mounted on the in-vehicle device 3 and used and recording setting data and the like are performed.

In the system configured as described above, the analog tachograph is used to record on the chart paper.
Similar to the mileage graph as shown in 6, the mileage that changes with time is displayed so that one mountain is formed every predetermined distance, for example, every 10 km, so that the mileage between any two time points can be known. Is required.

Therefore, in the in-vehicle device 3, 1 bit is allocated every 0.5 seconds in the IC memory card 4,
Every time the vehicle travels 100 m, the corresponding bit is set to 1 to obtain digital data recorded as shown in FIG. 25, and the digital data is analyzed by the analysis device 5 to obtain a predetermined time resolution and distance resolution, For example, mileage time series data in units of 100 m is created every 0.5 seconds, and a mileage graph as shown in FIG. 26 can be drawn with the created data.

[0007]

However, as described above, one bit of the recording area in the IC memory card 4 is set to 0.5.
If 0, 1 is recorded according to the second, the storage capacity is 3 to record the mileage for one day (24 hours).
There is a problem that it is not practical because it requires an expensive IC memory card, which is extremely large at 600 × 2 × 24/8 (= 21 k) bytes.

Therefore, in view of the above-mentioned conventional problems, the present invention collects vehicle operation information including information indicating the ever-changing vehicle speed and mileage in the form of digital data, and collects the collected digital data. In the vehicle operation information collection / analysis system for analysis, even if the in-vehicle device has a small amount of digital data to be recorded regarding the traveling distance, it is possible to create time-series data regarding the traveling distance with a predetermined resolution. A first object of the present invention is to provide a vehicle operation information collection / analysis system capable of using an inexpensive storage medium having a small storage capacity for recording digital data.

The present invention is also directed to a method of creating travel time series data capable of creating time series data of travel distance corresponding to each speed data even if less digital data is recorded regarding the travel distance than speed data. The second issue is to provide.

Further, the present invention is capable of producing time series data of a travel distance corresponding to each speed data even if less digital data is recorded regarding the travel distance as compared with the speed data. The third issue is to provide.

[0011]

The vehicle operation information collection and analysis system according to the present invention for solving the above-mentioned first problem is, as shown in the basic configuration diagram of FIG. 1 (a), for each operation. A vehicle in which a distance data indicating a traveling distance for each fixed time or a time when the vehicle travels a fixed distance and a plurality of speed data indicating a change in speed during the fixed time or the fixed distance are written in a portable recording medium 4. A partial total value obtained by reading in-vehicle device 3 that collects operation information, distance data and speed data written in storage medium 4, and adding up to the predetermined time or arbitrary speed data during the predetermined distance is obtained. When the distance corresponding to each speed data is obtained by multiplying the value obtained by dividing by the overall total value obtained by adding all the speed data during the fixed time or the fixed distance by the traveling distance during the fixed time or the fixed distance. It is characterized in that it comprises an analysis device 5 having a sequence data creating means 51a-1 when creating a column data.

To solve the above-mentioned second problem, the method for creating traveling time series data according to the present invention is shown in FIG.
As shown in the process diagram of (b), for each operation, a plurality of distance data indicating a distance traveled at a constant time or a time point at which the vehicle has traveled a constant time, and a plurality of changes representing speed changes during the constant time or the constant distance. In the method of creating distance time series data corresponding to each speed data based on the speed data of (A)
The partial total value obtained by adding up to any speed data during the fixed time or the fixed distance is obtained, and (B) the overall total value obtained by adding all the speed data during the fixed time or the fixed distance is obtained, (C) The time series data corresponding to each speed data is created by multiplying a value obtained by dividing the partial total value by the total total value by the traveling distance during the fixed time or the fixed distance. I am trying.

In order to solve the above-mentioned third problem, the mileage time-series data creating apparatus according to the present invention is shown in FIG.
As shown in the basic configuration diagram of (c), it represents, for each operation, distance data indicating a traveling distance at a constant time or a time point at which the vehicle travels a constant distance, and a change in speed during the constant time or the constant distance. In a device that creates distance time-series data corresponding to each speed data based on a plurality of speed data, a first partial sum value is obtained by adding up to the arbitrary speed data during the certain time or the certain distance. Computing means 51a
-2 and the second calculation means 51a-3 for obtaining the total total value obtained by adding all the speed data during the constant time or the constant distance, and the partial total value is divided by the total total value. And a third arithmetic means 51a-4 for multiplying the value by the traveling distance during the certain time or the certain distance, and distance time series data corresponding to each speed data by the arithmetic operation by the third arithmetic means 51a-4. It is characterized by creating.

[0014]

In the structure shown in FIG. 1 (a), the vehicle-mounted device 3
However, for each operation, the portable recording medium 4 is provided with distance data indicating a traveling distance for each fixed time or a time point when the vehicle has traveled a fixed distance, and a plurality of speed data indicating a change in speed during the fixed time or the fixed distance. To collect vehicle operation information.

Further, the time-series data creating means 51a-1 of the analysis device 5 can generate a certain period of time or an arbitrary velocity data within the certain distance on the basis of the distance data and the velocity data read from the storage medium 4. The added partial total value and the total total value obtained by adding all the speed data during a fixed time or the fixed distance are obtained, and the partial total value is divided by the total total value to obtain the value obtained during the fixed time. The distance time series data corresponding to each speed data is created by multiplying the distance or the constant distance.

Therefore, the distance data to be written in the storage medium 4 may be constant time or every constant distance, and the storage capacity required to write the distance data may be small.

In the method of FIG. 1B, in step (A), a partial total value obtained by adding up to an arbitrary speed data during a fixed time or a fixed distance in which the distance data is written is obtained, and the step (B) Then, an overall total value obtained by adding all the speed data for a certain period of time or the certain distance is obtained, and in the step (C), a partial total value is divided by the overall total value to obtain a value during a certain period of time. Distance time-series data corresponding to each speed data is created by multiplying the travel distance or a fixed distance, so using this method, even if there is less data to record about the travel distance than the speed data, It is possible to create time series data of traveling distances corresponding to each speed data.

In the configuration shown in FIG. 1C, the first computing means 51a-2 obtains a partial total value obtained by adding up to an arbitrary speed data during a fixed time for writing the distance data or a fixed distance, The second calculating means 51a-3 obtains an overall total value obtained by adding all the speed data during a certain time or a certain distance, and the third calculating means 51a-4 divides the partial total value by the overall total value. Since the distance time series data corresponding to each speed data is created by multiplying the value obtained by the distance traveled for a certain period of time or a certain distance, there is less data to record regarding the distance traveled compared to the speed data. Also, it is possible to create time series data of traveling distances corresponding to each speed data.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a specific configuration of the vehicle-mounted device 3 which constitutes a part of the vehicle operation information collection / analysis system according to the present invention, and has a microcomputer (CPU) 31 which operates according to a predetermined control program. The CPU 31 includes a ROM 31a for storing a control program and a RAM 31b for storing various data for signal processing.

The CPU 31 has an interface (I /
F) A distance pulse signal from the rotation sensor 1 via 32 and an accessory (A) of the ignition (IGN) switch.
A signal indicating the state of the (CC) switch is input, and the IC memory card 4 is detachably connected via a connector (not shown). In addition, 33 is a setting switch for setting a predetermined value or the like according to the type, for calculating a speed and a traveling distance according to a signal from the connected rotation sensor 1, and 34 is an IC memory card 4
It is a lid opening detection switch for detecting opening of a lid provided in an opening for inserting and removing.

In the in-vehicle device 3 having the above-described structure, the IC memory card 4 in which the card ID for identifying the card is written is mounted, so that the card is mounted on the IC memory card 4. Speed data and mileage data between each operation are written together with an operation ID for identifying each operation defined as a period from when the lid is closed to when the lid is opened. Because of this, C
The PU 31 inputs a signal generated by the rotation sensor 1 according to the traveling of the vehicle, processes the signal, measures the traveling speed of the vehicle, measures the traveling distance, and compresses the measured speed and distance. There are the following two methods for compressing the speed and the traveled distance and writing them to the IC memory card 4.

FIG. 3 shows a write format to the IC memory card 4 according to the first method. In FIG.
The writing area of the C memory card 4 includes a card ID writing area 41, an operation ID area 42 _{1 to} 42n, a distance data area 43 _{1 to} 43n, and a speed data area 44.
_{It is} composed of _{1 to} 44n and an option data area 45.

The card ID writing area 41 is a fixed data writing area 41a for writing fixed data such as a manufacturer code unique to the card, a tolerance used in compression, sampling time, etc. And a final address writing area 41c for writing the latest speed end address. Each service ID area 42 ₁ to 42n, manufacturer code, the distance data end address, speed data end address, tolerances, etc. sampling time is written. Each distance data 43 ₁ through 43n, the predetermined time intervals from the start of the operation, for example, distance data consisting of the traveling distance of 1 minute is written at a predetermined resolution, for example, 100m units. In addition, each speed data area 44 _{1 to} 44
The speed data is compressed and written in n.

The operation of the in-vehicle apparatus 3 for writing data in the format shown in FIG. 3 will be described below with reference to the flowcharts of FIGS. 4 to 6 showing the work performed by the CPU 31. The CPU 31 starts its operation when its power is turned on, and initializes in the first step S1. In the initialization of step S1,
Various flags F1 to F3 described later are set to 0. Then, it progresses to step S2 and it is determined whether ACC of an IGN switch is an ON state. When the determination in step S2 is YES, the process proceeds to step S3, where the CPU3
After performing the processing for the clock that keeps the time of year / month / day / hour / minute / second configured in the RAM 31b of No. 1, the process proceeds to step S4.

In step S4, card processing including reading and writing with respect to the card related to the mounting of the IC memory card 5 is performed. After that, the process proceeds to step S5, where measurement processing such as measuring the speed and the traveling distance based on the signal from the rotation sensor 1 is performed. In this step S5, the rotation sensor 1
Interrupts according to the input of the distance pulse signal from
It is determined whether or not the vehicle has traveled for 00 m, and if the vehicle has traveled for 100 m, the distance counter is incremented, and the count value of the distance counter is written as distance data in the distance data area of the IC memory card 4 every one minute. The distance counter is cleared to prepare for measurement and writing of the traveling distance for the next one minute.

Next, in step S6, the data indicating the speed and the data indicating the traveling distance measured in step S5 are compressed and written in the IC memory card 4, and the process returns to step S2. The above steps S2 to S6 are repeated. The compression processing in step S6 involves reading and writing to the card.

When the determination in step S2 is NO, that is, when the ACC of the IGN switch is in the off state, the process proceeds to step S7, the same clock processing as in step S3 is performed, and the same determination as in step 2 is performed in next step S8. When the determination in step S8 is NO, the process proceeds to step S9 to put the CPU 31 into the sleep state and returns to step S7. Until the ACC of the IGN switch is turned on and the determination in step S8 becomes YES, step S7 is performed.
Through S9 are repeated.

The card processing in step S4 is performed as shown in the subroutine of FIG. That is, in the card processing, I is set in the first step S4a.
It is determined whether the C memory card 4 is inserted in the card insertion slot. If the IC memory card 4 is inserted in the card insertion slot and the determination in step S4a is YES, the process proceeds to step S4b to determine whether the lid of the card insertion slot is open.

When the determination in step S4b is NO,
That is, when the lid is closed, the process proceeds to step S4c and it is determined whether the flag F1 is 1 or not. Flag F1
Is set to 0 at the time of initialization in step S1 and at the end of each operation. When the determination in step S4b is immediately after the lid is closed, the flag F1 is 0, so the determination in step S4c is If NO, the process proceeds to step S4d. In step S4d, the flag F1 is set to 1, and then the process proceeds to step S4e, where the IC previously inserted in the card insertion slot stored in the RAM 31b.
It is determined whether or not the end address written in the memory card matches the end address written in the IC memory card 4 inserted in the card insertion slot this time.

When the determination in step S4e is YES, the process proceeds to step S4f, in which it is determined whether 10 minutes have elapsed before the lid is opened and closed again. If the determination is NO in 10 minutes, the determination is NO. , And proceeds to step S4g to erase the end address currently being written, and then returns to the flowchart of FIG. When the determination in step S4e is YES and the determination in step S4f is NO, that is, when the driver opens the card insertion slot, reinserts the same IC memory card 4 and closes the lid within 10 minutes. I'm trying to avoid new services.

If the end addresses do not match and the determination in step S4e is NO, or if 10 minutes have elapsed, step S4e
When the determination in 4f is YES, the process proceeds to step S4h,
Here, the operation ID indicating the start of a new operation is written to update the ID, and the flags F2 and F3 used in the compression process described later are set to 0, and then the process returns to the flowchart of FIG.

After the flag F1 is set to 1 in step S4d, the determination in step S4c is YES, so
Steps S4d to 4h are skipped and the process immediately returns to the flowchart of FIG.

When the lid of the card insertion slot is opened, step S4
If the determination of b is YES, or if the IC memory card 4 is removed from the card insertion slot and the determination of step S4a is NO, the process proceeds to step S4i, where the flag F
It is determined whether 1 is 1. When the determination in step S4i is YES, that is, when the flag F1 is 1, the process proceeds to step S4j, where the end address is written in the IC memory card 4, and the written end address is stored in a predetermined area in the RAM 31b.

Then, in step S4k, the flag F1
To 0 before returning to the flowchart of FIG. After the flag F1 is set to 0 in step S4k, step S4k
As long as 4a is NO or step 4b is YES, the operation of returning to the flowchart of FIG. 4 through step S4a or 4b and step S4i is repeated.

The compression process of step S6 is performed every 0.5 seconds as shown in the subroutine of FIG. That is, in the compression process, it is determined whether the flag F2 is 1 in the first step S6a. Now, if the flag F2 is 0 and the determination in step S6a is NO, the process proceeds to step S6b, where the flag F2 is set to 1 and then to step S6c, where the speed and distance in step S5 of the flowchart of FIG. 4 are set. The speed V _T measured in the measurement process is written as the first data to the address in the IC memory card 4 designated by the address pointer (AP) as shown in FIG. 7A. After that, the process proceeds to step S6d, where the value minus -2 is stored in AP, and then the process returns to the flowchart of FIG. This is because the speed data is written in the direction opposite to the distance data and the operation ID from the position with a large address.

By setting the flag F2 to 1 in step S6b, step S when the compression process is performed again
The determination of 6a is YES, and the process proceeds to step S6e. In step S6e, it is determined whether the flag F3 is 1. This flag F3 is 0, and step S6
When the determination of e is NO, the process proceeds to step S6f, where the flag F3 is set to 1 and then the process proceeds to step S6g. In step S6g, the IC memory card 4 in which the speed V _T measured in the distance measuring process in step S5 is designated by the address pointer (AP)
The data is written in the address in the middle as the second data as shown in FIG. 7B. After that, the process proceeds to step S6h, in which the writing is performed in step S6g, the allowable difference is set to V _T to calculate the next allowable range, and then the process returns to the flowchart of FIG.

In step S6f, the flag F3 is set to 1.
By doing so, step S when the compression processing is performed again
The determination of 6e is YES, and the process proceeds to step S6j. Su
At step S6j, the step S5 immediately before is executed.
V measured by measuring _TIn step S6h above
It is determined whether or not it is within the calculated range.

When the determination in step S6j is YES, the process proceeds to step S6k, where the next allowable range as shown in FIG. 8 is calculated. After that, the process proceeds to step S61, where the midpoint V _{N of} the range obtained in step S6k is calculated as shown in FIG. In step S6m, the V _N calculated in step S6l is written to the address in the IC memory card 4 designated by the address pointer (AP) as the third data as shown in FIG. 7C. Thereafter, the process proceeds to step S6n to increment the compressed number N by 1, and then proceeds to step S6o to write the incremented N to the address in the IC memory card 4 incremented by +1 in the address pointer AP and return to the flowchart of FIG.

Thereafter, until the determination in step S6j is NO, that is, until V _T is outside the allowable range, steps S6a and S6 are performed.
6e and S6i to S6o are repeated.

If the determination in step S6j is NO, the process proceeds to step S6p, where the compression number N is set to 0, and then the process proceeds to step S6q, where AP is decreased by -2 and then the process proceeds to step S6s to set the flag F3. 0, the process returns to step S6e, and the above-described operation from step S6e is repeated.

As a result of the above operation, in the in-vehicle device 3, in the IC memory card 4, as shown in FIG. 9, speed data indicated by dots and points are omitted for each period from the start to the end of each operation. Compressed speed data composed of number data of speed data and data composed of traveling distance data D ₁ , D ₂ ... Written every minute corresponding to the compressed speed data are written, and this data is analyzed later. It is read and analyzed by the device 5.

On the other hand, the analysis device 5 installed in a vehicle management office of a transportation company that manages the operation of the vehicle is specifically configured as shown in FIG. 10, and according to a predetermined program. It has an operating personal computer (personal computer) 51. The personal computer 51 includes a personal computer body 51a, a keyboard 51b connected to the personal computer 51a,
CRT51c, floppy disk (FD) driver 51
d, printer 51e and card reader / writer (R /
W) 51f is connected.

In this analysis device 5, a floppy disk driver 51d is loaded with a program floppy disk (FD) 51g _{1 in} which an analysis program and the like are stored, and the floppy disk driver 51d is detached from the in-vehicle device 3 and mounted on the card R / W 51f. The operation data is read from the stored IC memory card 4, saved in the data floppy disk (FD) 51g ₂ mounted on the FD driver 51d, or the operation data read from the IC memory card 4 is directly analyzed. Or data FD51
The operation data saved once in g ₂ is analyzed, and the list, operation management table, graph, safety management table, etc. obtained as a result of this analysis are displayed on the CRT 51c or the printer 5
An IC memory card 4 which is mounted on the in-vehicle device 3 for recording operation data in addition to being printed by 1e
Initialize and record setting data.

In the analyzing apparatus 5 having the above-mentioned configuration, the personal computer main body 51a executes the work shown in the flowchart of FIG. That is, the personal computer main body 51a uses the program F
It is started by mounting D51g ₁ and the processing menu screen is displayed on the CRT 51 in the first step S21.
Display in c. After that, the process proceeds to step S22, where the selection of the ten keys on the keyboard 51b is awaited.

When the card reading is selected by the ten-key pad of the keyboard 51b, the process proceeds to step S23 to perform a card reading process of reading the operation data from the IC memory card 4 mounted on the card R / W 51f, and the following step S24. In step 2, a card reusing process is performed so that the IC memory card 4 that has read the operation data can be reused. After that, after saving the operation data read in step S25, step S2
In step S27, an error detection process is performed to detect an error, and the selection of setting data is awaited in the next step S27.

FD by the ten keys on the keyboard 51b
When reading is selected, the process proceeds to step S28 and the FD
After performing the FD reading process of reading the operation data from the data FD 51g ₂ mounted on the driver 51d, the process proceeds to step S29 to perform the error detection process of detecting the error.

When the card confirmation process is selected by the ten keys of the keyboard 51b, the process proceeds to step S30, and the IC memory card 4 mounted on the card R / W 51f.
Perform card confirmation processing to confirm. Then step S3
In step 1, the FW changing process for changing the free word (FW) is performed, the card reusing process is performed in the subsequent step S32, and it is determined in the next step S33 whether or not the continuous process is performed. The process returns to step S30 and steps S30 to S33 are repeated.
When the determination in step S33 is NO, the process returns to step S21. When the end is selected in step S22, the end process is performed in step S34 to end the operation.

In step S27, the continuous reading process in step S35, the list creation and display process in step S36, the operation management table creation and display process in step S37, the graph creation and display process in step S38, and the step S38.
The safety management table creation / display processing of 39 and the preliminary recording table creation / display processing of step S40 are performed. After execution of the continuous reading process in step S35, the process returns to step S23, and after executing steps S36 to S40, the process proceeds to step S41 to wait for selection by the function key of the keyboard 51b.

By the selection by the function key in the above step S41, the list creation display process of step S42, the operation management table creation display process of step S43, the safety management table creation display process of step S44, the graph creation display process of step S45, After performing the printing process of step S46 and the preliminary recording table creation and display process of step S47, the process returns to step S41, and the process returns to step S21 without selection.

In the graph creation / display process of steps S38 and S45, as one of them, a process of creating a distance graph and outputting it to the CRT 61c or the printer 61e is performed. In this distance graph creating / displaying process, for each period from the start to the end of each operation, compressed speed data for each minute consisting of speed data indicated by points and number data of speed data omitted between points, and Correspondingly, the distance expansion data corresponding to the speed expansion data created by decompressing the compressed speed data is calculated by the travel distance data D ₁ , D ₂ ... (Count value in units of 100 m) written every minute. create.

For this reason, in the analysis device 5, for each period from the start to the end of each operation, speed data indicated by points and number data of speed data omitted between the points 1
The compression speed data for each minute is decompressed to 0.
120 pieces of velocity development data V _{N 0 to} V _{N 119} are created every 5 seconds and stored in a predetermined area of the RAM 31b. 13 shows the created speed expansion data and the traveling distance data D ₁ , D ₂ ... (Count value in 100 m unit) written every minute corresponding to the compressed speed data. 120 pieces of distance expansion data d _{N 0 to} d _{N 119} are created every 0.5 seconds.

[0052] More specifically, now, to find the total A _N deployment velocity data for one minute from N-th time t ₀ to t _N from operation initiated by the following equation (1),

[Equation 1] After that, at the same arbitrary time t _n (0 ≦ t _n ≦ 60)
The total B _N of the velocity development data up to the second) is calculated by the following equation (2).

[Equation 2] From the above equations (1) and (2) and the N-th one-minute travel distance data D _N , the travel distance d _{N n} from the time t ₀ to t _{n in} the N-th one minute is calculated by the following expression (3):

[Equation 3] The distance development data as shown in Fig. 13 is obtained by performing this process for each 1-minute data, and the distance development data from the start of operation to the end is obtained as time series data every 0.5 seconds. You can FIG. 14 is a plot of the time series data for one minute. Also, every time the traveling distance reaches 5 km, the plot direction is folded back to draw a distance graph similar to that of the conventional chart paper, and it becomes possible to easily know the traveling distance between arbitrary two times.

In the above-described embodiment, the value of the traveling distance d _{N n} includes the calculation error and the error due to the compression tolerance, but since it is corrected by the data for every 1 minute, the accumulated error does not occur. Also, if 5 bits are required for one-minute mileage, 60x can be set for one day (24h) without compression.
The memory capacity of 24 × 5/8 = 900 bytes is sufficient, and the used memory capacity is very small.

The principle for creating the time-series data of the traveling distance has been described above. The operation of the analysis device 5 for creating the time-series data will be described with reference to the distance expansion which is one of the subroutines of the graph creation display processing. The process will be described in detail below with reference to FIG.

In the distance expansion processing, the first step S
At 101, the N region formed in the internal memory is set to 0, and at the subsequent step S102, both the n region and the A _N region similarly formed in the internal memory are set to 0. After that, the process proceeds to step S103, where V _{N n} (the nth speed development data in the Nth data) is added to A _N (the total value of the speed development data at the time of traveling the Nth 1km) in the A _N region.
Is added, the n region is incremented in the next step S104, and then the process proceeds to step S105, where it is determined whether or not the n region is 120. If the determination in step S105 is NO, the above steps are performed. Returning to S103, the above steps S103 to S105 are repeated.

When the determination in step S105 is YES, that is, when the value of the n region is 120, step S105
In step 106, it is determined whether or not the N area is 0. If the determination in step S106 is YES, the process proceeds to step S107 to set the D area in the internal memory to 0 km, and then to step S109. When the determination in S106 is NO, D + D _N-1 is written in the D area in step S108, and then the process proceeds to step S109.

In step S109, both the n region and the B _N region formed in the internal memory are set to 0. Then the process proceeds to step S110, where B _N region B _N (N
The value obtained by adding V _{N n} (n-th speed development data in the N-th data) to the total value of the 1-minute speed development data in the n-th data, that is, B _N + V _{N n} is written, and the next step In S111, the d _{N n} area formed in the internal memory is multiplied by B _{N n} / A _N by the N-th one-minute travel distance D _N to obtain the total value of the N-1-th one-minute travel distances. Is added, and this value d _{N n} is set in a predetermined area in the subsequent step S112.

Thereafter, the process proceeds to step S113 to increment the n region, and then proceeds to step S114 to determine whether the n region is 120, and this step S11.
When the determination in step 4 is NO, the process returns to step S110, and steps S110 to S114 are repeated.

When the determination in step S114 is YES, that is, when the Nth one-minute distance expansion data is obtained, the process proceeds to step S115, the A _N area is set to 0, and the N area is incremented in the next step S116. The process proceeds to step S117, where the value of the N area is A +
It is determined whether it is equal to 1 (the number of mileage data of the operation), and if the determination is NO, the above step S102.
And the steps S102 to S117 are repeatedly executed, and when the processing for one operation is completed, the original routine is returned to.

In the embodiment described above, the first method for compressing the speed and the traveling distance and writing the compressed data on the IC memory card 4 is as follows.
The mileage is set as the mileage for one minute, and is written in the IC memory card 4 every minute. The second method is to compress the distance flag every fixed distance, for example, every 1 km, from the start of the operation ID. FIG. 16 shows the writing format of the IC memory card 4 when writing by the second method.

In the figure, the writing area of the IC memory card 4 includes the card ID writing area 41, the operation ID areas 42 _{1 to} 42 n, and the option data area 45 which are the same as those in the first method. there is, in the second method, the distance data area without, on its behalf, the speed data area 44 ₁ to 44n, as shown in FIG. 17, the area to write the distance flag on top of the area for writing the compressed number is provided In this case, the distance data is integrated with the velocity data obtained by compressing the velocity measured at regular time intervals, for example, every 0.5 seconds, by the linear approximation method.

Further, as shown in FIG. 18, the compression process for compressing and writing the speed and mileage to the IC memory card 4 is performed in steps S6i and S6r instead of determining whether or not one minute has elapsed. 6, it is determined whether or not the vehicle has traveled 1 km, and the distance flag is written instead of writing the distance data in the distance writing area in step S6t. .

According to the second method, in the in-vehicle device 3, in the IC memory card 4, as shown in FIG. 19, speed data indicated by points and omissions between points are omitted for each period from the start to the end of each operation. Data consisting of compressed speed data consisting of the number data of the speed data and a distance flag written every 1 km corresponding to the compressed speed data is written, and this data is read by the analysis device 5 described later. Parsed.

On the other hand, the analysis device 5 installed in a vehicle management office of a transportation company that manages the operation of the vehicle has the same configuration as shown in FIG. The tasks shown in the flowchart of FIG. 11 to be executed are exactly the same except that the subroutines of the graph creation display processing of steps S38 and S45 are different.

In the distance graph creating / displaying process, for each period from the start to the end of each operation, compressed speed data for each minute consisting of speed data indicated by points and number data of speed data omitted between points, Correspondingly, the distance expansion data corresponding to the speed expansion data created by expanding the compressed speed data is created by the distance flag written every 1 km.

For this reason, in the analyzer 5, for each period from the start to the end of each operation, the speed data indicated by points and the number data of the speed data omitted between the points 1
The compressed velocity data for each km is decompressed to 0.
A number of speed every 5 seconds create and deploy data V _{N 0} ~V _{N a} is stored in a predetermined area of the RAM 31b. Then, by using the created speed expansion data and the distance flag written every 1 km corresponding to the compression speed data, a distance expansion data d for every 0.5 seconds as shown in FIG. 21.
Create _{N 0 to} d _{N a} .

More specifically, now, the total A _N of the development speed data during the 1 km running from the N-th time t ₀ to t _N from the start of operation is obtained by the following equation (4),

[Equation 4] After that, the total B _N of the speed development data up to an arbitrary time t _n during the same 1 km travel is obtained by the following formula (5).

[Equation 5] From the above equations (4) and (5) and 1 km, the traveling distance d _{N n} from the time t ₀ to t _n during the Nth 1 km traveling is _expressed by the following equation (6),

[Equation 6] The distance development data as shown in Fig. 21 is obtained by performing the above process for each 1km of data, and the distance development data from the start to the end of operation is obtained as time series data every 0.5 seconds. You can This 1km
FIG. 22 is a plot of time-series data during running. Also, every time the traveling distance reaches 5 km, the plot direction is folded back to draw a distance graph similar to that of the conventional chart paper, and it becomes possible to easily know the traveling distance between arbitrary two times.

In the above embodiment, the value of the traveling distance d _{N n} is corrected by the data for each 1 km traveling. In addition, since it is only necessary to write a 1-bit flag to the traveling distance of 1 km, the used memory capacity is very small.

Next, referring to FIG. 23, which shows the distance expansion processing which is one of the subroutines of the graph creation display processing, the operation of the analysis apparatus 5 for creating time series data based on the above-mentioned principle. The details will be described below.

In the distance expansion processing, the first step S
The N area formed in the internal memory is set to 0 in 201, and it is determined in the following step S202 whether the N area is 0 or not. When the determination in step S202 is YES, the process proceeds to step S203, in which a region a similarly formed in the internal memory is multiplied by 2 for the _{first 1} km traveling time T ₁ (during the first 1 km traveling. No. of 0.5 seconds data) is written, and the process proceeds to step S205. When the determination in step S202 is NO, that is, when the N region is not 0, the process proceeds to step S204, where N +
After writing a value obtained by multiplying the difference between the first 1 km traveling time and the N-th 1 km traveling time by 2, the process proceeds to step S205.

In step S205, both the n region and the A _N region which are similarly formed in the internal memory are set to 0. After that, the process proceeds to step S206, where V _{N n} (the nth speed development data in the Nth data) is added to A _N (the total value of the speed development data during the Nth 1km traveling time) in the A _N region. The added value is written, and the next step S2
In 07, the n region is incremented, and then the process proceeds to step S208, where it is determined whether or not the n region is a. When the determination in step S208 is NO, the process returns to step S205 and steps S205 to S2.
08 is repeated.

When the determination in step S208 is YES, that is, when the value of the n region becomes a, step S20
9, the B _N area and the n area are both set to 0, and then the process proceeds to step S210. In step S210, in the B _N area, B _N (at time t in the Nth data
V to (total value of velocity expansion data up to 0 <t <a)
A value obtained by adding _{N n} (n-th velocity expansion data in the N-th data), that is, B _N + V _{N n} is written, and it is determined in the next step S211 whether the value of the N region is equal to A or not. .

When the determination in step S211 is NO, the process proceeds to step S212, in which the d formed in the internal memory is formed.
_{In the N n} area, the B _{N n} / A _N is the Nth 10 (1 km is 100
(expressed in m units) is written, and when the determination in step S211 is YES, it is determined that it is the last run, and the process proceeds to step S213, where B _{N is set} in the d _{N n} region.
_n / _AN is the last mileage DE (the mileage of the operation-
N × 10) is multiplied and then written, and then step S2
Proceed to 14. In step S214, d _{N n} + 10N is written in the d _{N n} area, and in subsequent step S215, this value d _{N n} is set in a predetermined area.

Thereafter, the process proceeds to step S216 to increment the n region, and then proceeds to step S217 to determine whether the value of the n region is equal to a, and this step S2
If the determination in step 17 is NO, the process returns to step S210 and steps S210 to S217 are repeated.

If the determination in step S217 is YES, that is, if the distance development data for the Nth 1 km run is obtained, the process proceeds to step S218 to increment the N area and then proceeds to step S219, where the value of the N area. Is equal to A + 1 (the number of mileage data of the operation). When the determination in step S219 is no, the process proceeds to step S220, the value of the A _N area is set to 0, and then the process returns to step S202 and the above step S2.
02 to S220 are repeatedly executed, and when the process for one operation is completed and the determination in step S219 is YES, the process returns to the original routine.

As is clear from the explanation of the flow charts of FIGS. 15 and 23, the personal computer 5 of the analyzer 5 is shown.
The main body 51a of No. 1 reads the distance data and the speed data written in the IC memory card 4 for each operation, and outputs, for example, a fixed time for 1 minute or an arbitrary speed data for a fixed distance of 1 km, for example. Partial total value B _{N n}
Is divided by the total sum value A _{N n} of all speed data for a fixed time or a fixed distance and multiplied by the running distance or fixed distance for a fixed time to obtain the time corresponding to each speed data. Time series data creating means 5 for creating series data
In addition to acting as 1a-1, it calculates a partial total value obtained by adding up to arbitrary speed data for a fixed time or a fixed distance.
Second total value obtained by adding all the speed data for a certain period of time or a certain distance with the calculation means 51a-2
And the third calculating means 51a-4 for multiplying the value obtained by dividing the partial total value by the total total value by the traveling distance or the constant distance for a fixed time.

In the above embodiment, the speed data written by the vehicle-mounted device 3 in the IC memory card 4 as a storage medium is compressed by a specific method, but it is written without being compressed. It may be.

Further, in the embodiment, the distance time series data corresponding to each speed expansion data is created by using the speed expansion data obtained by expanding the compressed speed data once, but the compressed speed data is directly used. Then, the distance time series data corresponding to each speed data may be created.

[0079]

As described above, according to the present invention, vehicle operation information including information indicating the vehicle speed and mileage, which change from moment to moment, is collected in the form of digital data, and the collected digital data is analyzed. In the vehicle operation information collection and analysis system that performs, for each operation, distance data indicating a mileage at a constant time or a time point at which the vehicle has traveled a constant distance, and a plurality of speed data indicating a change in speed during a constant time or a constant distance, , A partial total value obtained by adding up to arbitrary speed data during a fixed time or the fixed distance, and an overall total value obtained by adding all speed data during the fixed time or the fixed distance, Since the distance time series data corresponding to each speed data is created by multiplying the value obtained by dividing the total value by the total total value by the traveling distance or the constant distance for a fixed time, Distance writes the transfer device to the storage medium data may be a predetermined time or a predetermined distance each less storage capacity in the storage medium to write the distance data, it becomes possible to use inexpensive.

Further, according to the method and apparatus for creating distance time series data of the present invention, time series data of travel distance corresponding to each speed data is created even if there is less data to be recorded regarding the travel distance than speed data. Therefore, this method and apparatus collects vehicle operation information including information indicating the speed and mileage of a vehicle that changes from moment to moment in the form of digital data, and analyzes the collected digital data. When applied to a collection analysis system, it becomes possible to use an inexpensive storage medium for collecting distance data, which has a small storage capacity.

[Brief description of drawings]

FIG. 1 is a diagram showing a basic configuration of a vehicle operation information collection / analysis system, steps of a mileage time-series data creation method, and a basic configuration of a mileage time-series data creation device according to the present invention.

FIG. 2 is a diagram showing a specific configuration of an in-vehicle device of the system according to the present invention.

FIG. 3 is a diagram showing an example of a format of data written in an IC memory card by the in-vehicle device of FIG.

FIG. 4 is a flowchart showing work performed by a CPU of the vehicle-mounted device shown in FIG.

FIG. 5 is a flowchart showing details of a part of FIG.

FIG. 6 is a flowchart showing details of another portion in FIG.

FIG. 7 is a diagram showing how velocity data is compressed and written by executing the flowchart of FIG. 6;

FIG. 8 is an explanatory diagram showing a method of compressing speed data.

FIG. 9 is a diagram showing velocity data and distance data written by executing the flowcharts of FIGS. 4 to 6;

FIG. 10 is a diagram showing a specific configuration of an analysis device of the system according to the present invention.

11 is a flow chart showing the work performed by the personal computer body of the analysis device of FIG.

12 is a diagram showing decompression speed data obtained by processing the compression speed data by the analysis device of FIG.

13 is a diagram showing developed distance data obtained by the processing by the analysis device of FIG.

FIG. 14 is a distance graph drawn by the developed distance data of FIG.

FIG. 15 is a flowchart showing the work performed by the personal computer body of the analysis device to obtain the developed distance data of FIG.

16 is a diagram showing another example of a format of data written in the IC memory card by the in-vehicle device of FIG.

17 is an explanatory diagram showing a method of compressing velocity and distance data in the format of FIG.

18 is a flowchart showing work for performing the compression process of FIG.

19 is a diagram showing velocity data and distance data written by executing the flowchart of FIG.

20 is a diagram showing decompression speed data obtained by processing the compression speed data of FIG. 19 by the analysis device.

FIG. 21 is a diagram showing developed distance data obtained by processing by the analysis device.

22 is a distance graph drawn by the developed distance data of FIG.

23 is a flowchart showing the work performed by the personal computer body of the analysis device to obtain the development distance data of FIG. 21.

FIG. 24 is a diagram showing a schematic configuration of a conventional general vehicle operation information collection / analysis system.

FIG. 25 is a diagram showing write distance data by a conventional vehicle-mounted device.

FIG. 26 is a diagram showing a distance graph drawn by an analog tachograph.

[Explanation of symbols]

 3 In-vehicle device 4 Storage medium (IC memory card) 5 Analysis device 51a-1 Time series data creation means (PC main body) 51a-2 First calculation means (PC main body) 51a-3 Second calculation means (PC main body) 51a-4 Third computing means (PC main body)

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[Procedure amendment]

[Submission date] November 27, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0051

[Correction method] Change

[Correction content]

For this reason, in the analysis device 5, for each period from the start to the end of each operation, speed data indicated by points and number data of speed data omitted between the points 1
The compressed speed data for each minute is expanded, and 120 speed expanded data V _{N0 to} V _{N for} every 0.5 seconds as shown in FIG.
_N119 is created and stored in a predetermined area. And
The created speed expansion data and the travel distance data D ₁ and D written every minute corresponding to the compressed speed data.
₂ ... (Count value in units of 100 m)
As shown in FIG. 13, 120 pieces of distance expansion data d _{N0 to} d _N119 are created every 0.5 seconds.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0053

[Correction method] Change

[Correction content]

In the above-described embodiment, the value of the velocity data V _Nn includes the calculation error and the error due to the compression tolerance.
Since it is corrected with the data for each minute, no cumulative error occurs. Also, if 5 bits are required for one-minute mileage, 60x can be set for one day (24h) without compression.
The memory capacity of 24 × 5/8 = 900 bytes is sufficient, and the used memory capacity is very small.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0055

[Correction method] Change

[Correction content]

In the distance expansion processing, the first step S
At 101, the N region formed in the internal memory is set to 0, and at the subsequent step S102, both the n region and the A _N region similarly formed in the internal memory are set to 0. Then the process proceeds to step S103, where _{A N} region _A N _V in (N th sum of the velocity deployment data at 1 minute) Nn (N
The value obtained by adding the (nth speed development data in the nth data) is written, the n region is incremented in the next step S104, and the process proceeds to step S105, where it is determined whether the n region is 120 or not. If the determination in step S105 is NO, the above step S103
Then, the above steps S103 to S105 are repeated.

Claims (3)

[Claims] 1. For each operation, distance data indicating a distance traveled at a constant time or a time point at which the vehicle has traveled a constant distance, and a plurality of speed data indicating a change in speed during the constant time or during the constant distance are allowed. An on-vehicle device that collects vehicle operation information by writing it on a portable recording medium, reads the distance data and speed data written on the storage medium, and reads the speed data up to the certain time or the certain distance. A value obtained by dividing the added partial total value by the total total value obtained by adding all the speed data during the fixed time or the fixed distance is multiplied by the traveling distance during the fixed time or the fixed distance to obtain each speed. A vehicle operation information collection and analysis system, comprising: an analysis device having a time-series data creating means for creating distance time-series data corresponding to the data. 2. Based on distance data indicating a traveling distance at a constant time or a time point when the vehicle has traveled a constant distance for each operation, and a plurality of speed data representing a change in speed during the constant time or during the constant distance. In the method for creating distance time-series data corresponding to each speed data, a partial total value is calculated by adding up to any speed data during the fixed time or the fixed distance, and during the fixed time or the fixed distance. The total total value obtained by adding all the speed data of the above is calculated, and the value obtained by dividing the partial total value by the total total value is multiplied by the traveling distance during the certain time or the certain distance to correspond to each speed data. A method for creating mileage time series data, which is characterized by creating distance time series data. 3. For each operation, based on distance data indicating a distance traveled at a constant time or a time point when the vehicle has traveled a constant distance, and a plurality of speed data indicating a change in speed during the constant time or during the constant distance. An apparatus for creating distance time-series data corresponding to each speed data, the first calculation means for obtaining a partial total value obtained by adding up to the fixed time or arbitrary speed data during the fixed distance; Or a first calculating means for obtaining an overall total value obtained by adding all speed data during the certain distance, and a running distance during the certain time to a value obtained by dividing the partial total value by the overall total value or A third arithmetic means for multiplying the fixed distance, and distance time-series data corresponding to each speed data is created by the arithmetic operation by the third arithmetic means. Creation device.