JPH04137089A - Running state recording device - Google Patents

Abstract

PURPOSE:To improve the resolution of recording data and to enable accurate and long time recording by recording a running state in a semiconductor memory as digital information. CONSTITUTION:In an analogue/digital (A/D) converters 31 to 34 corresponding to various kinds of running information, a various kind of running information is digitalized corresponding to the timing of a sampling cock CLK2 generated in a controller circuit 5 and the signal is outputted to a selector circuit 6. In the circuit 6, the information from the converters 31 to 34 corresponding to various kinds of running information as well as time information T from a clock circuit 4 and optional information OPD from a console 2 are received and the signal selected corresponding to a data selector signal ST from a circuit 5 is outputted as input data ID for a memory circuit 7. In the circuit 7, the input data are recorded and the output data OD are reproduced. Thus, the resolution of the recording data can be improved and the vehicle running history can be accurately recorded.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a driving status recording device installed in driving equipment such as an automobile, and particularly relates to a driving status recording device that uses a semiconductor memory as a recording section. It relates to a recording device.

(Prior Art) A tachograph is conventionally known as a device for recording the operating status of an automobile. This tachograph combines a speedometer and a clock, and is equipped with a mechanism that attaches a circular recording paper to the clock mechanism, and uses a pen to record the hourly driving status of a car on the recording paper. The recorded information includes distance traveled, instantaneous speed, amount of vibration of the vehicle body, and arbitrary records made by sending electrical signals to the built-in electromagnetic relay. An example of a record on a circular recording paper is shown in Figure 4 (reference to the new edition of Automotive Engineering Handbook, published by Automotive Engineering Kinsen Incorporated Association, published by Tosho Shuppansha).

Current tachographs have recording durations of one day,
There is a 7-day version, but the 7-day version is equipped with a mechanism that allows continuous recording by automatically replacing the recording paper. When the duration period ends, the key is used to perform an opening/closing operation to attach and detach the recording paper.

However, this type of tachograph had the following problems. First, since the data is recorded on recording paper using a pen, the resolution of the recorded data is low, making it difficult to accurately reproduce the vehicle operation history. Second, since a large number of mechanical parts are required, the shape is large and vulnerable to external shocks. Thirdly, there are various inconveniences, such as the short time available for recording on the recording paper, which requires frequent replacement of the recording paper.

(Problems to be Solved by the Invention) As described above, in conventional driving situation recording devices, the resolution of recorded data is low and the reproducibility of vehicle driving history is poor.
There were problems such as the large size, weak impact resistance, and lack of reliability.

The present invention has been made in consideration of the above circumstances, and its purpose is to have high resolution recorded data, be able to accurately record vehicle operation history, and have a small shape that is resistant to external shocks. The objective is to provide a strong and reliable driving status recording device.

[Structure of the Invention (Means for Solving the Problem)] The gist of the present invention is that instead of recording vehicle operation information on recording paper using a pen as in the conventional tachograph,
The objective is to digitize data related to automobile operation and record it accurately and with high density on a semiconductor memory.

That is, the present invention provides an analog/digital conversion circuit that digitizes various operation-related information sent from operation equipment, and a clock circuit that generates time information for operation and at the same time generates a clock signal for controlling the overall operation. a selector circuit that selects various operation information digitized by the analog/digital conversion circuit and time information generated by the clock circuit; and a semiconductor memory that stores the operation information and time information selected by the selector circuit. A driving status recording device comprising a memory circuit consisting of a memory circuit, and a controller circuit that receives a clock signal from the clock circuit and controls the overall operation and timing,
It is characterized by digitizing various operation information sent from operation equipment and recording it on a memory circuit made of semiconductor memory, and reproducing the same information from this memory circuit.

(Function) In the present invention (claim 1), the clock circuit generates time information and sends it to the selector circuit, display, etc., and also generates a tarok signal for controlling the operation of the entire operation recording device, This clock signal is sent to the controller circuit.

The analog/digital conversion circuit that corresponds to each type of information related to the driving history, such as speed, distance, vibration, and steering wheel breakage, digitizes the information related to each driving history in accordance with the timing of the sampling clock generated by the controller circuit. and sends it to the selector circuit.

The controller circuit receives the clock signal from the clock circuit and sends a sampling clock to the analog/digital conversion circuit corresponding to each piece of information related to the operation history, an address signal for controlling the memory circuit, a read/write control signal, and writing. Generates a timing clock and a data select signal for the selector circuit.

This controller circuit also controls the rearrangement of data on the memory circuit.

Therefore, a new data string is created by inputting the data once recorded on the memory circuit and sent to the selector circuit.

The selector circuit passes data corresponding to the data select signal from the controller circuit to the memory circuit.

Data passed through the selector circuit is recorded in the memory circuit under control from the controller circuit, and data in the memory circuit is reproduced under control from the controller circuit.

Further, in the present invention (claim 2), at the same time as performing the normal operation information recording and reproducing operation, a part of the previously recorded data on the memory circuit is reduced and the data is stored again on the memory circuit as a new data string. Rearrange. This allows the memory circuit to
Along with detailed operation information up to a certain time back from the present, rough operation information before a certain time from the present is stored.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of a driving situation recording device and its peripheral equipment according to a first embodiment of the present invention. The operation status recording device 1 according to this embodiment receives various operation-related information that can reflect the operation status of the operation device from the operation device such as a car in which this device is installed. In this embodiment, the speed, travel distance, amount of vibration, and steering wheel turning angle of the operating equipment are input as operating information, and furthermore, any information can be recorded from the console 2 outside the operating status recording device.

The operation status recording device 1 is composed of three A/D converters 6, a memory circuit 7, and the like. Operational information such as the speed, travel distance, amount of vibration, and steering angle of the operating equipment inputted from the operating equipment into the operating status recording device 1 is input into A/D converters 31 to 34 corresponding to each piece of information. be done.

In the clock circuit 4, at the same time as the time information T is generated, a clock signal CLKI for controlling the operation of the entire apparatus is also generated, and these signals are sent to the controller circuit 5. Further, the time information T is used for time display on a clock or the like provided in the operating equipment.

The controller circuit 5 receives the clock signal CLKI from the clock circuit 4 and converts the A/D converter 3. A sampling timing at ~34 is generated. At the same time, the controller circuit 5 outputs a clock signal CLK2 for controlling the recording and reproducing timing on the memory circuit 7, a data select signal ST for the selector circuit 6, an address signal AD for controlling data recording and re-recording for the memory circuit 7, and a read signal. /Write switching signal R/W is generated.

, A/D converters 31 to 34 corresponding to various operation information digitize the various operation information in accordance with the timing of the sampling clock CLK2 generated by the controller circuit 5, and the digitized signals are sent to the selector circuit. 6 is output. The selector circuit 6 receives information from the A/D converters 3 to 34 corresponding to various operation information, time information T from the clock circuit 4, and arbitrary information OPD from the console 2, and selects data from the controller circuit 5. Predetermined signals are selected according to signal ST, and these signals are output as input data ID to memory circuit 7.

In the memory circuit 7, the input data I from the selector circuit 6
address signal AD from the controller circuit 5.
, recording/reproduction timing clock signal CLK2, and read/write switching signal R/W, recording of input data from selector circuit 6 and reproduction of output data OD from memory circuit 7 are performed.

Note that when reproducing and outputting the information recorded in this device, a recording/reproducing operation control signal RWC instructing a read operation from the memory circuit 7 is inputted to the controller circuit 5 from the console 2 or the like. It is possible to reproduce data from above 7. However, depending on the situation, it may be necessary to provide a security function that prevents data from being easily recorded or reproduced from the outside into the memory circuit 7.

With such a configuration, various operation information from the operation equipment is transmitted to the A/D converter 3. .about.34, and is stored in the memory circuit 7 together with time information from the clock circuit 4. In this case, unlike when using a tachograph, information is not recorded on recording paper with a pen, but A/D converted information is recorded on semiconductor memory, so the resolution of the recorded data is high and the vehicle operation history can be accurately recorded. can be recorded. Further, since no mechanical mechanism is required, the shape can be made smaller, and it can also be made stronger against external impacts. This can improve reliability. Furthermore, operations such as replacing recording paper are no longer necessary, and operability can be improved.

FIG. 2 is a block diagram showing a schematic configuration of a second embodiment of the present invention. Note that the same parts as in FIG. 1 are given the same reference numerals, and detailed explanation thereof will be omitted. In this embodiment, data compression or selection operation is performed on the data previously recorded on the memory circuit 7, and the data is re-recorded on the memory circuit 7 as a new data series to realize data rearrangement. It is.

In the normal operation information recording procedure similar to that of the embodiment shown in FIG. Recording/reproduction timing clock CLK2 from the controller circuit 5. Read/write switching signal R
/W.

It is read from the memory circuit according to the instruction of the address signal AD and sent to the controller circuit 5. On the controller circuit 5, the reproduced data OD from the memory circuit 7 is input, and this reproduced data series is compressed or selected to reduce the amount of data and a new data series CD is generated. Data series CD is sent to selector circuit 6.

The recording operation of the newly created data series CD onto the memory circuit 7 is performed by passing the select signal from the controller circuit 5 through the selector circuit in the same way as the recording operation of other various data onto the memory circuit 7. Recording/reproducing timing clock signal CLK2 generated by
This is realized under the control of address signal AD and read/write switching signal R/W.

This data rearrangement operation on the memory circuit 7 is performed during the normal operation status recording operation, and the rearranged new data series and the normal operation status data are separated into areas on the memory circuit 7. This prevents the information of the new data series from being lost due to normal operation status data being overwritten on the recorded and rearranged new data series. In addition, the data rearrangement operation on the memo circuit 7 can meet various demands such as selectively recording valid and important data or recording global data fluctuations over a long period of time. done in order to

For example, if you want to track the long-term operation history of operating equipment and at the same time grasp the detailed operating status for a short period of time, such as immediately before an accident occurs, you can collect information related to various operations from The data is captured at a high sampling rate at a first time interval sufficient to reproduce the situation, and all the information obtained is temporarily held in a predetermined area on the memory circuit 7 as detailed operation information. Of this detailed operation information, data for each second time interval which is longer than the first time interval is extracted from among the detailed operation information that has passed a predetermined time since it was recorded on the memory circuit, or from the detailed operation information that has elapsed a predetermined time. A new data series for the second time interval is created by performing appropriate calculations on the information on the controller circuit 5, and the approximate operation is performed in a predetermined area in the memory circuit 7 where detailed operation information is not recorded. Record as information. After this relocation operation onto the memory circuit 7 is completed, the area in which detailed operation information that has been recorded for a predetermined period of time after being recorded onto the memory circuit 7 is repeatedly used as a recording area for new detailed operation information. Ru.

By recording in this way, the data accumulated as general operation information can be used to manage the operation status of operating equipment over a long period of time and driving violations, and at the same time, the data accumulated as detailed operation information can be used. By using this system, it becomes possible to precisely reproduce the operating conditions for a short period of time, such as immediately before an accident occurs, and it becomes possible to clarify where responsibility lies.

Alternatively, if the purpose is to obtain an indication of the aging of the operating equipment on which the present operating status recording device is installed, as in the case of the previous example, it is possible to use the first Among the detailed operation information captured at time intervals and held in a predetermined area of the memory circuit 7, those that have passed a predetermined time include, for example, a traveling speed of a predetermined value or more, a speed fluctuation of a predetermined value or more, and a vibration of a predetermined value or more. The operation information before and after a portion indicating an abnormal operation situation such as the amount of traffic is selectively recorded as selective recording information in a predetermined area on the memory circuit 7 where detailed operation information is not recorded.

In this case as well, the area in which detailed operation information for which a predetermined period of time has elapsed is recorded is used as a recording area for new detailed operation information.

If such records are made, it is possible to understand the recent operation status of operating equipment, and at the same time, to see the history of past abnormal operation or accidents, and to check and repair operating equipment or buy and sell operating equipment. This can be used as a guideline for setting prices.

FIG. 3 is a block diagram showing a schematic configuration of a third embodiment of the present invention. Note that the same parts as in FIG. 1 are given the same reference numerals, and detailed explanation thereof will be omitted.

In the operation status recording device 1 in this embodiment, operation-related information sent from operation equipment is first input to the selector circuit 61. In the selector circuit 61, a predetermined signal is selected according to the data select signal ST sent from the controller circuit 5, and the selected signal is output to the A/D converter 3. In the A/D converter 3, the selector circuit 6. The operation information that has passed through is digitized, and this digitized signal is output to the selector circuit 62.

In the selector circuit 62, operation information from the A/D converter 3, time information T from the clock circuit 4, arbitrary information OPD from the console 2, and data on the memory circuit 7 sent from the controller circuit 5 are rearranged. A new data series CD is input, predetermined data is selected according to a data select signal ST sent from the controller circuit 5, and the selected data is passed and sent to the memory circuit 7. In other operations, operation information is recorded on the memory circuit 7 in accordance with the same procedure as in the embodiment shown in FIGS. 1 and 2.

Even with such a configuration, the same effects as in the second embodiment can be obtained.

Note that the present invention is not limited to the embodiments described above. In the example, the speed of operation equipment, travel distance, amount of vibration, and steering wheel turning angle are used as information related to operation. The driving situation recording device according to the present invention can also be realized by using information indicating other driving conditions such as. Further, the period for storing detailed operation information, the period for storing rough operation information, etc. may be determined as appropriate according to specifications. In addition, various modifications can be made without departing from the gist of the present invention.

[Effects of the Invention] As described above, according to the present invention, the operation status is recorded as digital information on a semiconductor memory rather than on recording paper using a pen, so the resolution of the recorded data is improved. It is possible to realize a highly reliable driving situation recording device that is capable of high-performance, accurate long-term recording, is lightweight and compact, is resistant to external shocks because it has no mechanical parts, and is highly reliable.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a schematic configuration of a driving status recording device and its peripheral equipment according to a first embodiment of the present invention, and FIG.
FIG. 3 is a block diagram showing a schematic configuration of a second embodiment of the present invention. FIG. 4 is a block diagram showing a schematic configuration of a third embodiment of the present invention. FIG. 2 is a diagram showing an example of recording paper. DESCRIPTION OF SYMBOLS 1... Operation status recording device, 2... Console, 3.31-34... A/D converter, 4... Clock circuit, 5... Controller circuit, 6.60, 62...・Selector circuit, 7...Memory circuit,

Claims (2)

[Claims] (1) An analog/digital conversion circuit that digitizes various operation-related information sent from operation equipment, and a clock circuit that generates time information for operation and at the same time generates a clock signal to control overall operation; It consists of a selector circuit that selects various operation information digitized by the analog/digital conversion circuit and time information generated by the clock circuit, and a semiconductor memory that stores the operation information and time information selected by the selector circuit. A driving status recording device comprising: a memory circuit; and a controller circuit that receives a clock signal from the clock circuit and controls overall operation and timing. (2) A/D conversion means for converting various operation-related information sent from operation equipment from analog to digital; time information generation means for generating operation-related time information; and digitization by the A/D conversion means. a first storage means consisting of a semiconductor memory for storing various operation information generated by the operation and time information generated by the time generation means, and for storing detailed operation information from the present time up to a certain period of time; Among the operation information stored in the storage means, a new operation information series with less data than this various operation information is created from various operation information that has passed a predetermined period of time after recording, and a new operation information series is created that has a smaller number of data than the various operation information. 1. A driving status recording device comprising: a second storage means comprising a semiconductor memory for storing rough driving information of the driving condition.