JPH0781875B2 - Operation management device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an operation management device for vehicles and the like.

(Prior Art) Conventionally, a device called a tachograph has been used as a means for managing the operation status of a vehicle or the like.

A general tachograph has a velocity axis in the radial direction of a disc-shaped recording paper and a time axis in the circumferential direction.
It makes one lap in time and continuously records vehicle speed data with a self-writing pen.

(Problems to be Solved by the Invention) However, the above tachograph has the following problems.

Since tachograph records are limited to those that can be read and judged by humans, most of them are used for the labor management of drivers, and it is almost impossible to know the condition of the vehicle during operation.

Therefore, when an accident occurs, in order to know the condition of the vehicle immediately before the accident and the operation status of the driver, the data is read in detail using a microscope, and based on this data, calculation work is performed to obtain detailed data such as acceleration. Therefore, it is necessary to determine whether or not the braking operation is performed. The work using this microscope also has a problem that it cannot be regarded as accurate data if the tachograph resolution is low. Therefore, for example, an accelerometer may be attached in order to record a change in acceleration (rapid braking, rapid start) applied to the vehicle, but there is a problem that the cost of equipment is increased by the provision of the accelerometer and the recording device, which is uneconomical. . In addition, there is a problem that adjustment is difficult because time matching with the tachograph is necessary.

Therefore, the inventor of the present application focused on obtaining other operation information from the data input to the conventional tachograph, and developed the device of the present invention, and the present invention enables determination of brake operation with a simple configuration. The purpose is to provide an operation management device.

(Means for Solving Problems) In order to solve the above problems, the present invention has the following configuration.

That is, sensing means for continuously detecting operation data consisting of vehicle speed and presence or absence of brake operation at predetermined time intervals, time setting means for outputting reference time data, and the operation data as the time data. A recording device having a storage means for storing in correspondence with the above, and for detecting a change with time of the acceleration of the vehicle by performing an arithmetic processing based on the operation data stored in the storage means. Calculating means, output means for outputting the presence or absence of the brake operation with respect to the change with time of the acceleration and the passage of time as data corresponding to the same time axis, and reading the operation data stored in the storage means. , Obtaining the change with time of the acceleration through the calculation means, The absence of data has a control means for outputting to said output means, characterized by comprising a said recording apparatus and connectable analyzer.

(Operation) The operation will be described.

In the recording device, operation data including the speed of the vehicle continuously detected by the sensing means and the presence / absence of brake operation, and the reference time data output by the time setting means are stored correspondingly. When judging the brake operation from the operation data, the recording device is connected to the analysis device.

The control means of the analysis device reads out the operation data stored in the storage means, calculates the change with time of the acceleration through the calculation means, and obtains the change with time of the acceleration and the data of the presence or absence of the brake operation with respect to the passage of time. Output to the output means. In the output data, the change over time of acceleration and the presence / absence of a brake operation over time are displayed in correspondence with the same time axis.

(Examples) Hereinafter, preferred examples of the present invention will be described in detail with reference to the accompanying drawings.

First, the configuration will be described.

In FIG. 1, 10 is a recording device, which can be connected to an analysis device 12, and both devices constitute an operation management device of this embodiment.

In the recording device 10, a sensing means 14 is a speed sensor, which emits a number of signal pulses corresponding to the number of rotations of an axle of a vehicle.

Reference numeral 16 is a counter, which counts the number of pulses from the speed sensor 14 and outputs the number of pulses per unit time.

Reference numeral 18 is a clock, which emits a number of clock pulses corresponding to time.

20 is also a brake sensor that is a sensing means, and detects a brake ON or OFF signal.

An arithmetic circuit 22 receives a clock pulse from the clock 18, measures a unit time from the clock pulse, and arithmetically processes the number of pulses from the counter 16 per unit time to obtain vehicle speed data. Also, time data as a clock (time setting means) is calculated and output by a clock pulse, and a sampling time for data acquisition of measurement resolution (for example, 0.2 msec) is set. further,
The ON / OFF signal from the brake sensor 20 is received, and the time when the brake is depressed and the time length thereof are calculated by calculating from the number of clock pulses.

Reference numeral 24 denotes a display, which displays the current time and the vehicle speed output from the arithmetic circuit 22 on an LCD.

Reference numeral 26 is a memory that is a storage unit, and stores the current time obtained by the arithmetic circuit 22, the speed of the vehicle corresponding to the time, and the operation data such as ON / OFF of the brake corresponding to the time. A RAM having a capacity of 128 Kbytes is used as the memory 26, and it goes without saying that a larger capacity of the memory 26 is advantageous.

28 is an interface, which is a recording device 10 and an analysis device 12
It is a connection means for connecting the, and may be provided on the analysis device 12.

The recording device 10 is configured as described above and is attached to the vehicle.

Next, the analysis device 12 will be described. The analysis device 12 can be connected to the recording device 10 via the interface 28.

Reference numeral 30 denotes a CPU, which is composed of a circuit including a microprocessor, a control unit which is a control unit reads operation data from the memory 26 of the recording device 10, and the operation unit which is an operation unit follows a predetermined program from the operation data. Operation information such as irrigation acceleration, change in acceleration, and travel distance is obtained by arithmetic processing.

Reference numeral 32 denotes a CRT or a printer which is an output means, and prints the operation information obtained by the CPU 30 in a predetermined format, that is, as a graph showing a change with time of acceleration.

Next, the operation of the operation management device configured as described above will be described.

First, the operation of obtaining and displaying acceleration information from speed information will be described.

A speed sensor 14 that outputs a pulse number according to the rotation speed of a vehicle axle and a brake sensor 20 that detects an ON / OFF signal from a brake switch (not shown) are connected to a recording device 10 shown in FIG. To do. Further, the date and the recording start time are input to the memory 26 of the recording apparatus 10 by using the input button 36 while checking the display 24 (initial set).

When the initial setting is completed, a clock pulse is sent from the clock 18 to the arithmetic circuit 22. The arithmetic circuit 22 measures the time with the clock pulse and displays the time on the display 24. The processing such as the speed is performed by counting the number of pulses sent from the speed sensor 14 for each sampling time preset by the clock pulse sent from the clock 18 in the counter 16
Is calculated by the calculation circuit 22 and the value for each sampling time is calculated.
Send to. Then, in the arithmetic circuit 22, the number of pulses sent from the counter 16 can be used to know the number of rotations of the vehicle axle. Therefore, the vehicle speed at the sampling time (unit time) can be obtained from the product of the outer circumference of the tire used and the number of rotations of the axle. .

The arithmetic circuit 22 sequentially stores in the memory 26 velocity data for each sampling time corresponding to the time axis of the time obtained by measuring from the clock pulse sent from the clock 18.

In addition, a brake sensor that detects the presence or absence of brake operation
The pulse from 20 (generated when the brake is turned on) is also sent to the arithmetic circuit 22, and the presence or absence of the pulse from the brake sensor 20 is also sequentially stored in the memory 26 corresponding to the same time axis as the speed data. It

Information obtained by the arithmetic circuit 22, such as time and speed, is displayed on the display 24, and can be read by the driver as a reference value. For this reason, it is possible to make the driver understand that the data is recorded when, for example, the vehicle is overspeeding, and a secondary effect that the driver can drive safely can be expected.

When the traveling of the vehicle is completed, the recording device 10 is manually or automatically input with an end signal to stop the recording operation.

Next, the analysis of the operation data recorded in this way will be described. When the operation of the vehicle is completed, the connector 34 is removed and the recording device 10 is set in the analysis device 12 which is a computer system (see FIG. 3).

When an analysis start instruction is input to the analysis device 12 from the keyboard 38, the control means of the CPU 30 reads speed data and brake operation data corresponding to time from the memory 26 of the recording device 10 via the interface 28. At that time, the control unit
The calculation unit of the CPU 30 calculates the acceleration from the speed data to obtain it. 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).

Then, the time T between the speed data Sn read previously and the speed data Sn _{+ 1} read next is read (step 102). However, T is set in advance and is read for confirmation, and this operation may be omitted if the reliability of the data is sufficient.

Subsequently, the acceleration G is calculated by calculation processing (step 10).
Four). This calculation is performed by the following calculation formula.

(However, Sn and S _{n + 1} are units of m / sec, T is sec, and G is m / sec ^2. ) This acceleration is calculated by, for example, a change in velocity at predetermined time intervals of 1 second. However, other than that, G may be captured as a change in time for traveling a predetermined distance of, for example, 1 m, and further, a change in speed per unit time is obtained as a function, and differential processing is performed. Then, a method of obtaining G may be used.

The magnitude of G thus obtained is + (acceleration), −
(Deceleration), and is output from the CRT 40 of the analysis device 12 and the printer 42 (steps 106 and 108). An output example (graph) of the acceleration G is shown in FIG. The horizontal axis of the graph is the time axis, and the vertical axis shows the point where the acceleration is 0 at the center, and the upward direction shows + G and the downward direction shows -G. In this graph,
+ G indicates a vehicle acceleration state, and -G indicates a deceleration state. Therefore, a large + G indicates rapid acceleration and a large −G indicates rapid deceleration. However, in the case of sudden deceleration, the presence or absence of the brake operation cannot be read only by the change of G. This is because deceleration can also be achieved by downshifting the transmission gear. For example, in order to read the situation of brake operation immediately before an accident,
Must be combined with a graph showing the brake signal.

Therefore, in the operation management device of the present invention, the memory of the recording device 10
The change of the pulse (indicating brake ON) from the brake sensor 20 is read from 26. Then, since the CPU 30 can read the pulse detected by the brake sensor 20 corresponding to the same time axis as the previous acceleration graph, it can be output / printed on the graph shown in FIG. 5 or as a single graph. It becomes possible to read the correspondence between the change in and the brake operation. As a result, for example, in the case of a collision accident, the speed will naturally drop due to the collision, so negative acceleration will be recorded, but whether or not the braking operation was performed immediately before the collision by inspecting the presence or absence of the braking operation at the same time axis as the acceleration You can judge whether.

As another display, the speed data in the memory 26 of the recording device 10 can be displayed corresponding to time. Further, the traveling distance for one day or for each predetermined time can be calculated and displayed from the relationship between the time and the speed.

Therefore, in the above-mentioned embodiment, vehicle speed, acceleration, brake operation, mileage can be displayed and read with the passage of time, and therefore, in addition to grasping the operating conditions before and after the above-mentioned traffic accident, the remoteness of the driver, It is possible to know if there is a dangerous driving and use it as a material for safe driving education.

In the above-described embodiment, the example in which the speed sensor and the brake sensor are attached is described, but as another embodiment, it is possible to detect the presence or absence of excessive engine rotation by recording the engine speed, which is wasteful. Resources are available to guide you in controlling fuel consumption and excessive engine rotation. If sensors such as fuel flow rate, accelerator opening, gear position, etc. are provided and recorded with time, it is possible to obtain data as to whether or not efficient operation was performed. Brake sensor ON
Whether or not there is a sudden brake can be known by recording the brake pressure (brake depression pressure) in addition to / OFF.
In case of an accident, it can be particularly effective operation data. In order to record the driver's trend, opening and closing the door, providing a work or break identification switch while stopped,
You can see if the driver was working, was taking a break, or had a nap.You can also manage the number of hours of heavy work, in addition to monitoring headaches, obtain data on the driver's health management, and collect personnel data. It can be collected.

If a highway / general road identification switch is provided, a speed violation can be detected from the relationship with the speed of the vehicle, which can be a psychological speed control means for the driver.

Further, by measuring and recording the speed and the inter-vehicle distance by the sensor, it is possible to read whether the safe inter-vehicle distance is maintained. In this way, operation data that should be collected is recorded using a sensor that can be collected according to time, and by combining it, data necessary for operation management can be collected on the same time axis, and necessary information can be obtained. is there.

Although various preferred embodiments of the present invention have been described above, the present invention is not limited to the above-mentioned embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. .

(Effects of the Invention) When the operation management device of the present invention is used, the recording device includes the operation data including the speed of the vehicle continuously detected by the sensing means and the presence or absence of the brake operation, and the reference output by the time setting means. Corresponding time data is stored correspondingly. Further, in analyzing the brake operation, the control means of the analysis device reads out the operation data stored in the storage means, calculates the change with time of the acceleration through the calculation means, and calculates the change with time of the acceleration and the passage of time. The data indicating whether or not the brake operation is performed is output to the output means. Therefore, it is possible to detect the change in the acceleration of the vehicle due to the brake operation without providing an accelerometer specially on the vehicle, and the like.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of an operation management device according to the present invention, FIG. 2 is a perspective view of a recording device, FIG. 3 is a perspective view of an analysis device, and FIG. 4 is a flowchart showing a procedure for obtaining acceleration. , FIG. 5 is a graph showing the output of acceleration. 10 ... Recording device, 12 ... Analysis device, 14 ... Speed sensor,
20 ... Brake sensor, 22 ... Calculation circuit, 26 ... Memory, 30 ... CPU, 32 ... Output means.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP 63-131293 (JP, A) JP 62-245919 (JP, A) JP 63-151814 (JP, A) JP 58- 84394 (JP, A) Actually opened 62-93259 (JP, U)

Claims (1)

[Claims] 1. A sensing means for continuously detecting operation data consisting of vehicle speed and presence / absence of brake operation at a predetermined time interval; a time setting means for outputting reference time data; and the operation data. A recording device having a storage means for storing in association with the time data, and based on the operation data stored in the storage means,
Arithmetic means for detecting a temporal change in the acceleration of the vehicle by performing arithmetic processing; for outputting the temporal change in the acceleration and the presence / absence of the brake operation with respect to the passage of time as data corresponding to the same time axis. Output means;
And, the operation data stored in the storage means is read, the temporal change of the acceleration is obtained through the arithmetic means, and the output means outputs the temporal change of the acceleration and the data of the presence or absence of the brake operation with respect to the passage of time. An operation management device, comprising: a control unit for outputting the data to the recording device; and an analysis device connectable to the recording device.