JPH1125304A - Safe driving managing device and output managing table for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to prevent a coarse driving by judging damage of transported article and uncomfortableness in relation to a rapid acceleration and deceleration at the time of transporting article and persons in particular. SOLUTION: A driving managing device has memory (7) for storing a speed sensor 1 and speed data detected by the speed sensor 1, an acceleration arithmetic circuit 3b for obtaining the acceleration of a vehicle or the like as driving information by differentiating or taking differences or the speed data stored in the memory (7) and an output means 11 for outputting the information obtained by the acceleration arithmetic circuit 3b in a specified format. Further, a body feeling acceleration arithmetic circuit 3c is provided as an second arithmetic circuit for differentiating or taking differences of the driving information obtained by the acceleration arithmetic circuit 3b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safe driving management device and its output management table.

[0002]

2. Description of the Related Art Safe operation management is of the utmost importance in companies operating vehicles, such as freight forwarding companies, passenger transportation companies, driving schools, and the like. 2. Description of the Related Art Conventionally, a tachograph is known as an apparatus for managing the operation of a vehicle. The tachograph has a velocity axis in the radial direction of the disk-shaped recording paper and a time axis in the circumferential direction, and makes one revolution in 24 hours, for example. Since the speed corresponding to the time is recorded on the recording paper, the presence or absence of a speed violation of the vehicle can be known from the speed record, and is used as data for safe operation management.

[0003] However, since tachograph records are limited to those in which data can be read and judged in the interval, most are used for labor management of a driver, and it is almost impossible to know the state of a running vehicle. It is. Therefore,
In the event of an accident, in order to know the state of the vehicle and the driver's operation status immediately before the accident, read the data finely using a microscope and perform calculation work based on the data to obtain detailed data such as acceleration. Is required to determine the presence or absence of a braking operation. The operation using the microscope also has a problem that if the resolution of the tachograph is low, it cannot be regarded as accurate data. For this reason, for example, an accelerometer may be attached to record a change in acceleration (rapid braking, sudden starting) applied to the vehicle, but there is a problem that the cost of equipment increases due to the provision of the accelerometer and the recording device, which is uneconomical. . In addition, there is a problem that time matching with the tachograph is necessary and adjustment is difficult.

[0004] Therefore, the applicant first disclosed in Japanese Patent Application No. 63-2694 (Japanese Patent Application Laid-Open No. 1-178813, Japanese Patent Application No. 7-81875) operating information such as acceleration which could not be detected by a conventional tachograph. Based on this, we applied for an operation management device that enables detailed evaluation of driving technology and obtained the right.

As shown in FIG. 4, a speed sensor 1 for emitting a pulse number corresponding to the rotation speed of the axle of the vehicle, a brake sensor 2 for detecting an ON / OFF signal from a brake switch, and an arithmetic circuit 3 , A clock 4, a counter 5, a display 6, a memory 7, and an interface 8 are connected to a vehicle computer 9. The vehicle computer 9 can be connected via the interface 8 to a computer 12 installed in an office or the like in which an output device 11 such as a printer or a monitor is connected to a CPU 10 as an analysis device.

The counter 5 counts the number of pulses from the speed sensor 1 and outputs the number of pulses per unit time. The clock 4 transmits clock pulses of a number corresponding to time. The arithmetic circuit 3 receives the clock pulse from the clock 4, measures a unit time from the clock pulse, and calculates the number of pulses from the counter 5 per unit time to obtain speed data of the vehicle. In addition, time data as a clock is calculated and output by the clock pulse, and a measurement resolution (for example, 0.2 msec) and a sampling time for data acquisition are set. The memory 7 stores the current time obtained by the arithmetic circuit 3 and the speed of the vehicle corresponding to the time as the storage means.

A clock pulse is sent from the clock 4 to the arithmetic circuit 3, and the arithmetic circuit 3 measures time by the clock pulse and displays the time on the display 6. The processing of the speed and the like is performed by counting the number of pulses sent from the speed sensor 1 for each preset sampling time by the counter 5 using the clock pulse sent from the clock 4 and calculating the value for each sampling time. Send to Road 3. Then, since the arithmetic circuit 3 determines the axle rotation speed of the vehicle from the number of pulses sent from the counter 5, the speed of the vehicle at the sampling time (which is a unit time) is obtained from the product of the outer circumference of the tire being used and the axle rotation speed. .

The arithmetic circuit 3 sequentially stores the speed data for each sampling time corresponding to the time period obtained by measuring the clock pulse sent from the clock 4 into the memory 7. Also, a pulse from the brake sensor 2 for detecting the presence or absence of a brake operation (which is generated when the brake is turned on) is also sent to the arithmetic circuit 3, and the brake sensor 2 corresponding to the same time period as the speed data. The presence / absence of a pulse from is also sequentially stored in the memory 7.

The display 6 has an arithmetic circuit 3 for time, speed, etc.
Is displayed, and the driver can read the information as a reference value.For example, when the vehicle speed exceeds the speed, the driver can understand that the data is recorded. It can be expected that a secondary effect will be obtained.

If the operation data recorded in this way is analyzed by the computer 12 on the office side, the control means of the CPU 10 transmits the speed data corresponding to the time from the memory 7 via the interface 8. Read data. At this time, the acceleration is calculated from the speed data by the calculation unit of the CPU 10 to obtain the acceleration. The procedure is shown in the flowchart of FIG.

First, vehicle speed data Sn (n is an integer) for each sampling is read (step 100). Subsequently, the time T between the previously read speed data Sn and the next read speed data Sn _{+ 1} is read (step 102). However, T is set in advance and is read for confirmation. This operation may be omitted if the reliability of the data is sufficient.

Subsequently, the acceleration G is obtained by a calculation process (step 104). This calculation is a so-called differential or difference calculation process in which the increase or decrease of the speed data is divided by the time T.

For example, if the speed changes within a specific time T (for example, 0.5 seconds) due to a sudden brake application,
When the arithmetic circuit 3 calculates the acceleration G, if the speed before the change is VO and the speed after the change is VE, G = G
What is necessary is just to calculate | require by (VO-VE) / t.

As known, x is a real variable that moves in section I, y is a function of x in section I, and Δx is a finite constant value. When x and x + Δx are within the interval I, Δy (x) = y (x + Δx) −y (x) is expressed as x
Difference (or constant difference, difference) of y at Δy (x) /
Δx is called a difference coefficient and Δx is called a difference of x, and can be handled in the same way as differentiation.

The magnitude of G thus obtained is classified into ten (acceleration) and one (deceleration), and is output from the output means 12 such as a CRT or a printer of the computer 12 (steps 106 and 108). Fig. 6 shows an output example (graph) of the acceleration G.
Shown in The horizontal axis of the graph is the time axis, the vertical axis is the point of zero acceleration at the center, 10 G upward and 1 G downward.
In this graph, + G indicates an acceleration state of the vehicle, and 1G indicates a deceleration state. Therefore, big 10G is sudden acceleration, big 1G
Indicates rapid deceleration such as sudden braking.

In this way, the speed, acceleration, brake operation, and mileage of the vehicle can be displayed and read with the passage of time. It is possible to know the presence or absence of dangerous driving, and it can be used as data for safe driving education.

[0017]

However, Japanese Patent Application No. 63-2694 (Japanese Unexamined Patent Application Publication No. 1-178813, which has been described as the prior art)
The operation management device of Japanese Patent Publication No. Hei 7-81875) can determine the sudden acceleration and deceleration by obtaining the acceleration, objectively grasp the driver's driving, and try to enforce safe driving. It was not possible to judge the problem of rough driving, such as discomfort caused by driving a person like a taxi or bus.

[0018] Even if the acceleration / deceleration is particularly small, if it is repeated alternately, it will be in a resonance state, and it can be said that it is a dangerous operation.
This is referred to as squatting and hiccup driving, and when transporting to a person such as a bus, the vehicle may fall over due to slight acceleration or deceleration, which may cause an accident in the vehicle. Also, in normal trucking, cargo collapse occurs.

An object of the present invention is to solve the above-mentioned disadvantages of the prior art, and particularly to accelerate the acceleration of suddenly driving such as damage to the conveyed goods or uncomfortable driving such as slapping and hiccups, especially when carrying goods or people. An object of the present invention is to provide a safe driving management device capable of suppressing rough driving by detecting deceleration in relation to ride comfort, and an output management table thereof.

[0020]

In order to achieve the above object, the present invention provides, as a safe driving management device, a speed sensor for detecting speed data of a vehicle or the like at predetermined time intervals, and a speed sensor for detecting speed data of the vehicle. A storage device for storing speed data, acceleration calculation means for differentiating or differentiating the speed data stored in the storage device to obtain acceleration of a vehicle or the like as driving information, and driving obtained by the acceleration calculation means In a safe driving management device having an output unit for outputting information in a predetermined format, a gist is that a second calculating unit for further differentiating or differentiating the driving information obtained by the acceleration calculating unit is provided. is there.

Further, the output management table of the safe driving management device includes, as an output from the output means of the safe driving management device, a change graph of speed data with time set on the horizontal axis;
An acceleration change graph in which positive and negative threshold values are set on the vertical axis and time is set on the horizontal axis as a result of differentiating or differentiating the speed data, and the driving information of the acceleration represented in the acceleration change graph is further subjected to second differentiation or The gist is to select and draw all or any of the graphs in which plus and minus threshold values are set on the vertical axis and time is set on the horizontal axis as the difference.

According to the first aspect of the present invention, the speed data detected by the speed sensor for detecting the speed data of the vehicle or the like at predetermined time intervals, and the speed data stored in the storage device is differentiated or differentiated by the acceleration calculating means. By further differentiating or differentiating the driving information of the acceleration of the vehicle or the like obtained by the second calculating means, it becomes possible to analyze the uniform acceleration and the constant deceleration driving, and the ride comfort such as the trembling and the hiccup driving and the load. It can be used as an improvement material for bad rough driving that causes collapse.

According to the second aspect of the present invention, in addition to the above-described functions, the plus and minus threshold values are set on the vertical axis and the time is set on the horizontal axis as the output from the output means of the safe driving management device. The resulting change graph is obtained as an extremely easy-to-read judgment material.

[0024]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a safe driving management device according to the present invention, FIG. 2 is a flowchart of the same, and FIG. 3 is an explanatory diagram of an output management table of the safe driving management device of the present invention. 5, the same components as those in FIG. 5 are denoted by the same reference numerals.

As in the prior art shown in FIG. 5, the safe driving management apparatus of the present invention detects speed data of a vehicle or the like at predetermined time intervals and outputs a pulse number corresponding to the rotation speed of the axle of the vehicle. It is composed of a sensor 1 and a vehicle computer 9, and further comprises a portable terminal 13 for connection with a computer 12 installed in an office or the like.

The vehicle computer 9 includes a CPU 14 forming the arithmetic circuit 3, a clock 4, a counter 5, a display memory 7,
An interface 8 is provided, but it is assumed that there is no display.
The computer 12, which is installed in an office or the like, comprises a CPU 15, other storage circuits and the like, and an output means 11 such as a CRT or a printer.

In addition to this embodiment, the vehicle computer 9 and the terminal 13 may be integrated, and in the above-described embodiment, the terminal 13 is a handy type and is separated from the vehicle computer 9 after driving is completed. Although it is assumed that the computer 12 is connected to a computer 12 installed in an office or the like, the connection can be made through communication means such as wireless, wired, or optical fiber. In some cases, data may be transmitted by an IC card or other memory card.

According to the present invention, the arithmetic circuit 3 is a distance arithmetic circuit 3 for calculating a distance from speed data detected by the speed sensor 1.
a, and an acceleration calculation circuit 3b for differentiating or differentiating the speed data stored in the memory 7, which is the storage device, with the speed data detected by the speed sensor 1 to obtain the acceleration of the vehicle or the like as driving information. Although the same as the conventional example, a sensible acceleration calculation circuit 3c for further differentiating or differentiating the driving information obtained by the acceleration calculation circuit 3b and stored in the memory 7 is provided.

The calculation of the acceleration is the same as that of the conventional example. As shown in FIG. 2, the speed data of the vehicle is read from the speed sensor 1 for each sampling, the speed data Sn read first, and the speed data Sn read next. Loaded speed data S
The time T between the data of _{n + 1} is read, and the acceleration G is changed when the speed changes within a specific time T. At this time, the speed before the change is VO, and the speed after the change is VE. G = (V
O-VE) / t.

The magnitude of G obtained in this way is classified into ten (acceleration) and one (deceleration) as shown in Fig. 3b and output from the output means 11 of the computer 12. The axis is the time axis, the vertical axis is the point of acceleration 0 at the center, the upper direction indicates 10 G, and the lower direction indicates 1 G. In this graph, + G indicates the vehicle acceleration state, and 1 G indicates the deceleration state. Therefore, a large 10G indicates rapid acceleration, and a large 1G indicates rapid deceleration.

Further, the driving information stored in the memory 7 is differentiated or differentiated by the sensible acceleration calculating circuit 3c from the driving information obtained by the acceleration calculating circuit 3b.
A change graph such as the second derivative as shown in FIG.

In the change graph shown in FIG. 3C, the horizontal axis of the graph is the time axis, the vertical axis is the point of zero acceleration, the upward direction is a decay value, and the downward direction is a single value. This makes it possible to analyze the constant deceleration operation, which can be used as a material for improving the riding comfort such as the swaying and the hiccup driving, and the rough rough driving that causes the collapse of the load.

Any of the change graphs a, b, and c shown in FIG. 3 can be output from the output means 11 using a CRT or a printer connected to a computer 12 installed in an office or the like. It is also possible to select and output.

[0034]

As described above, the safe driving management device and its output management table of the present invention can be used to rapidly accelerate or suddenly damage damaged goods and poor ride comfort, especially when carrying goods or people. By judging the deceleration in relation to the riding comfort, it is possible to suppress rough driving.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a safe driving management device of the present invention.

FIG. 2 is a flowchart showing the operation of the safe driving management device of the present invention.

FIG. 3 is an explanatory diagram showing an output management table of the safe driving management device of the present invention.

FIG. 4 is a block diagram showing a conventional example.

FIG. 5 is a flowchart showing the operation of the conventional example.

FIG. 6 is a graph showing an acceleration output waveform of a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Speed sensor 2 ... Brake sensor 3 ... Calculation circuit 3a ... Distance calculation circuit 3b ... Acceleration calculation circuit 3c ... Physical acceleration calculation circuit 4 ... Clock 5 ... Counter 6 ... Display 7 ... Memory 8 ... Interface 9 ... Vehicle computer 10 ... CPU 11 ... Output means 12 ... Computer 13 ... Terminal 14 ... CPU 15 ... CPU 16 ... Memory 17 ... Interface

Claims (2)

[Claims] 1. A speed sensor for detecting speed data of a vehicle or the like at predetermined time intervals, a storage device for storing speed data detected by the speed sensor, and a speed data stored in the storage device In a safe driving management device having acceleration calculating means for differentiating or subtracting the acceleration of the vehicle or the like as driving information, and output means for outputting the driving information obtained by the acceleration calculating means in a predetermined format, A safe driving management device comprising a second calculating means for further differentiating or differentiating the driving information obtained by the calculating means. 2. A change graph of speed data in which time is set on a horizontal axis as an output of the output means according to claim 1,
An acceleration change graph in which positive and negative threshold values are set on the vertical axis and time is set on the horizontal axis as a result of differentiating or differentiating the speed data, and the driving information of the acceleration represented in the acceleration change graph is further differentiated secondarily. Or an output management table of a safe driving management device characterized by selecting and drawing all or any of the graphs in which plus or minus threshold values are set on the vertical axis and time is set on the horizontal axis as differences.