JPH0766002B2 - Operating state recording / playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention records the engine speed and traveling speed and the state of brake pedal operation in an actual traveling state of an automobile, and reproduces these to reproduce the same. The present invention relates to an operating state recording / reproducing device that displays a graph on a time axis.

(Prior Art) Conventionally, in a vehicle driving simulation device or the like,
Perform a pseudo driving operation by grasping the road condition from the scene displayed in front of the driver to be inspected, and calculate the engine speed and running speed of the automobile engine from the operation data of the accelerator pedal and brake pedal at this time. However, there is a device in which these data and a signal corresponding to the operation of the brake pedal are recorded and reproduced later so that the driver's driving skill and driving temperament can be analyzed.

(Problems to be Solved by the Invention) However, in the above-described conventional device, since the vehicle is not actually driven and driven, the driving operation depends on the sense of speed received by the driver to be inspected and the difference in performance between the vehicles. Is not clear, and the data does not always accurately reflect the driving skill and driving disposition of the inspected driver. For this reason, it has not been possible to accurately analyze the driving skill and driving disposition of the driver to be inspected.

The present invention has been made in view of the above circumstances. Therefore, the data of the engine speed, the operation of the brake pedal, and the traveling speed obtained from an actually driven vehicle are recorded, and these are reproduced at the same time. It is an object of the present invention to provide an operating state recording / reproducing device that displays a graph on an axis.

(Means for Solving the Problem) In order to achieve such an object, a driving state recording / reproducing apparatus of the present invention includes a rotation speed detecting means for outputting a rotation speed signal according to the rotation speed of an engine of an automobile, and a brake pedal. Brake pedal operation detection means for outputting a brake signal according to the operation of, a speed detection means for outputting a speed signal according to the traveling speed of the vehicle, and a stop instruction lamp is lit after a predetermined time has elapsed from the switch operation. Stop instruction signal output means for outputting a stop instruction signal; magnetic recording means for simultaneously recording the four signals on a magnetic tape;
Graph display means for displaying the four signals reproduced from the magnetic recording means on the same time axis as a graph.

Further, when recording the four signals on the magnetic tape by the magnetic recording means, a photographing and recording means for photographing and recording the front scene viewed from the automobile may be provided at the same time.

Further, using a video camera as the photographing and recording means,
It is also possible to record the four signals as two signals including two pieces of information in each of the Rch and Lch audio signal recording portions of the video camera.

(Operation) A rotation speed signal, a speed signal, a brake signal, and a stop instruction signal, which are obtained while actually driving a vehicle, are recorded, and these signals are displayed as a graph on the same time axis. The correlation becomes clear, and the actual driving skill and driving disposition of the driver to be inspected can be accurately analyzed. In addition, the response performance of the vehicle itself becomes clear from the change in engine speed and the change in speed with respect to the operation of the brake pedal. Moreover, from the graph, the time from when the stop instruction lamp is turned on to when the brake is operated can be measured.

Further, if the front view seen from the car is to be recorded at the same time as the rotation speed signal is recorded, the inspected driver operates the car under any road condition by referring to the view. In addition, it can be easily understood, and the driving skill and the driving disposition can be analyzed with higher accuracy.

Furthermore, if a video camera is used as the photographing and recording means and four signals are recorded in the audio signal recording portion, the existing one can be used as the magnetic recording means, and the configuration is easy.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 6. FIG. 1 is an overall configuration diagram showing an outline at the time of recording of an operating state recording / reproducing apparatus of the present invention, and FIG.
FIG. 3 is a block circuit diagram of an embodiment of the recorder shown in FIG. 3, and FIG. 3 is a block circuit diagram of an embodiment of a regenerator used at the time of regenerating of the operating state recording / reproducing apparatus of the present invention. FIG. 5 is a time chart for explaining the operation by showing the signal waveforms of the respective parts of the recorder and the regenerator, and FIG. 6 shows the graph display means used when reproducing the operation state recording and reproducing apparatus of the present invention. It is a figure which shows an example of the graph display obtained.

First, the outline of the entire configuration at the time of recording will be described with reference to FIG. On the automobile 10, a video camera 12 as a photographing / recording means for photographing and recording a front view seen from the inside of the automobile 10 is installed facing forward. Signals from the recorder 14 are applied to the Rch and Lch audio input terminals of the video camera 12, respectively. This recorder 14 and video camera
The 12 audio signal recording portions constitute magnetic recording means for recording the engine speed signal of the engine 16 and the like. And
The cord 14 on the input side of the distributor that supplies spark current to the ignition plug of the engine 16 to the recorder 14.
Pickup clip 20 as a rotation speed detection means for sandwiching
The rotation speed signal obtained from is given. In addition, the recorder 14
Further, a brake signal from a switch 23 as a brake pedal operation detecting means that is turned on / off according to the operation of the brake pedal 22 is given to the. Marks 26, 26 are affixed to the tire 24 on two sides of the concentric circle divided into two parts, and an optical sensor 28 as a speed detecting means is arranged in the tire house of the automobile facing these marks 26, 26. Every time 26, 26 corresponds to this optical sensor 28, a pulsed speed signal is given to the recording machine 14 from the amplifier unit 30 connected to the optical sensor 28. Further, a switch 32 for starting a stop instruction is connected to the recorder 14, and the switch 32 is also used.
A stop instruction lamp 34 that is turned on after a lapse of a predetermined time from is operated is connected.

Next, the configuration of the recording machine 14 will be described with reference to FIG. 2, FIG. 4 and FIG. The spark current given to the ignition from the cord 18 on the input side of the distributor is radiated quite strongly, and by simply sandwiching the cord 18 with the pickup clip 20, a pulse-shaped signal of a sufficiently large level according to the rotation speed of the engine 16 is generated. A rotation speed signal as shown in FIG. 4 (a) is obtained at the rotation speed signal input terminal 36. The rotation speed signal is divided by the first variable resistor 38, and the divided signal is amplified by the amplifier 40 and given to the first one-shot multivibrator 42 as a trigger. Each time the first one-shot multivibrator 42 is applied with a trigger, it outputs a narrow "L" level pulse as shown in FIG. 4 (b), and this pulse outputs the first modulation circuit 44 and the first modulation circuit 44. To the D / A conversion circuit 46.

Further, a brake signal that is turned on / off by operating the brake pedal 22 is given to the brake signal input terminal 48, and the waveform shaping circuit 50 removes the waveform shaping and chattering, and a signal as shown in FIG. 4 (c). As a control signal to the first carrier selection circuit 52. The first carrier wave selection circuit 52 is supplied with a first frequency signal of, for example, 10 KHz from the first oscillation circuit 54, and is supplied with a second frequency signal of, for example, 5 KHz from the second oscillation circuit 56. 10KH with the brake pedal 22 not depressed
5KH when the first frequency signal of z is selected and stepped on
Select the second frequency signal of z. Then, one of the selected frequency signals is given to the first modulation circuit 46, A1 modulated by the pulse signal from the first one-shot multivibrator 42, and the modulated signal as shown in FIG. 4 (d). Is output as. This modulated signal contains information on the rotation speed signal and the brake signal, and is applied to the Rch of the audio input terminal of the video camera 12 via the Rch output terminal 56. Further, the first D / A conversion circuit 46 outputs a DC voltage corresponding to the pulse period, and the first D / A conversion circuit 46 outputs the DC voltage according to the voltage value.
The engine speed display means 60 displays the engine speed of the engine 16 by numbers or the like.

In addition, from the amplifier unit 30 connected to the optical sensor 28,
A pulse-like speed signal as shown in FIG. 5 (h) corresponding to the rotational speed of the tire 24, that is, the traveling speed of the automobile 10 is obtained at the speed signal input terminal 62. The section x in FIG. 5 (h) is an amplifier unit when the automobile 10 is at a low speed and the optical sensor 28 is in a state of corresponding to the marks 26, 26 for a long time.
Output from 30. This speed signal is given to the second one-shot multivibrator 64 as a trigger. The second one-shot multivibrator 64 outputs a narrow "L" level pulse as shown in FIG. 5 (i) every time a trigger is given, and this pulse outputs the second modulation circuit 66 and the first modulator 66. Is applied to the inverting circuit 68 of. The second one-shot multivibrator 64 has a retrigger function and outputs a pulse corresponding to the length of the section x to the input such as the section x in FIG. 5 (h). Then, to the second modulation circuit 66, either the first frequency signal of 10 KHz from the first oscillation circuit 54 or the second frequency signal of 5 KHz from the second oscillation circuit 56 is supplied to the second carrier wave. It is selected and given by the selection circuit 70. Here, the second carrier selection circuit
70 is controlled by a stop instruction signal described later, selects the first frequency signal of 10 KHz when the stop instruction signal is output, and selects the second frequency signal of 5 KHz when the stop instruction signal is not output. select. Therefore, the second modulation circuit 66
From FIG. 5 (k), the pulse output from the second one-shot multivibrator 64 causes the carrier wave to be A1.
The modulated signal to be modulated is output and is further applied to the adding circuit 74. A third frequency signal of, for example, 18 KHz is given to the adder circuit 74 from the third oscillator circuit 74,
The added signal in which the third frequency signal is superimposed on the modulated signal as shown in FIG. 5 (l) is output. The signal to be added contains information on the speed signal and the stop instruction signal, and is given to the Lch of the audio input terminal of the video camera 12 via the Lch output terminal 78. The reason why the third frequency signal of 18 KHz is added is to prevent the AGC circuit of the video camera 12 from excessively operating in the non-signal section of the A1 modulated signal. Further, the signal obtained by inverting the output of the second one-shot multivibrator 64 by the first inverting circuit 68 is the third one-shot multivibrator 80.
As a trigger. The third one-shot multivibrator 80 operates in up-age and outputs a pulse wider than the pulse of the second one-shot multivibrator 64. Then, the output of the third one-shot multivibrator 80 is given to the speed lamp 82 to light the section where the pulse exists. Where the third
The reason why the pulse width of the one-shot multi-vibrator 80 is widened is to appropriately lengthen the lighting time of the speed lamp 82.

The stop signal instructing means 72 is a timer provided with a starting switch 32 and a second variable resistor 86 for adjusting time, and when a predetermined time elapses after operating the starting switch 32,
An "H" level stop instruction signal is output as shown in FIG. 9 (j) and is supplied to the second carrier selection circuit 70, and the stop instruction lamp 34 is lit via the stop instruction signal output terminal 88.

Next, a playback device 90 for displaying a graph from the playback signals of the signals recorded on the audio Rch and Lch of the video camera 12
The graph display means 112 will be described with reference to FIGS. Rc for audio signal of video camera 12
The playback signal from h is 2 via the Rch input terminal 92 of the playback device 90.
The reproduced signal from the Lch is given to the a contact of one circuit of the circuit 2-contact changeover switch 98, and the reproduced signal from the Lch is input to the Lch input terminal 94 of the reproducer 90.
Is applied to the a contact of the other circuit of the changeover switch 98 via. Then, the reference signal generated from the reference signal generating means 96 is applied to the b-contact of one circuit and the b-contact of the other circuit of the changeover switch 98, for example, by modulating the frequency signal of 5 KHz with the pulse of the reference cycle. The Rch reproduction signal (FIG. 4 (d)) selected by the changeover switch 98 is sent to the first 5 KHz miss pulse detector 100 (missing pulse detector) and the first 5 KHz miss pulse detector 100 (missing pulse detector).
Of 10 KHz miss pulse detector 102. These miss pulse detectors 100 and 102 operate so as to output a signal at "H" level when the input signal does not include a frequency signal having a predetermined frequency or higher. Therefore, from the first 5KHz miss pulse detector 100,
A signal as shown in FIG. 4 (e), which is a "H" level pulse, is output while there is no signal in which the carrier wave due to one modulation is interrupted, that is, while the pulse of the first one-shot multivibrator 42 is present. This pulse signal is converted by the second D / A conversion circuit 104 into a DC voltage according to the pulse cycle,
Further, the voltage is divided by the third variable resistor 106, and the divided signal is given to the second engine speed display means 108. Further, this divided voltage signal is given to the graph display means 112 via the rotation speed signal output terminal 110. Further, while the pulse of the first one-shot multivibrator 42 is present from the first 10 KHz miss pulse detector 102 to which the Rch reproduction signal is given, and while the carrier of the reproduction signal is the second frequency signal of 5 KHz. Is output to the 10 KHz low-pass filter 114 as shown in FIG. 4 (f). Then, from this 10 KHz low-pass filter 114, the first one-shot multivibrator as shown in FIG.
A signal whose level is “H” is output only while the passage of the pulse corresponding to 42 is blocked and the second frequency signal is used as a carrier wave, and is supplied to the graph display means 112 via the brake signal output terminal 116. .

The Lch reproduction signal selected by the changeover switch 98 (Fig. 5 (l)) is given to the 18KHz low-pass filter 118 that blocks passage of 18KHz, and is restored to the signal of Fig. 5 (k). Two 5 KHz miss pulse detectors 120 and a second 10 KHz miss pulse detector 122 are provided. Then, the second 5KHz
The miss pulse detector 120 outputs a signal such as that shown in FIG. 5 (m) which becomes “H” level while the pulse of the second one-shot multivibrator 64 is present, and the third D /
It is supplied to the A conversion circuit 124, converted into a DC voltage according to the pulse cycle, further divided by the fourth variable resistor 126, and the divided signal is given to the speed display means 128 to drive the automobile 10. Display the speed with numbers. Also,
This divided voltage signal is given to the graph display means 112 via the speed signal output terminal 130. Then, the second 10 KHz miss pulse detector 122 outputs a signal as shown in FIG. 5 (o), which is further inverted by the second inverting circuit 132 to give a stop instruction signal as shown in FIG. 5 (p). It is given to the graph display means 112 via the output terminal 134.

Furthermore, the signal from the common terminal of the Rch circuit of the changeover switch 98 is transferred to the AF amplifier via the resistor 136 and the monitor switch 138.
It is given to 140, and the amplified signal is given to the speaker 142.

In such a configuration, first, the automobile 10 is set in the idling state, the first variable resistor 38 of the recording machine 14 is adjusted, and the first variable resistor 38 is adjusted.
The display of the engine speed display means 60 is matched with the display of the tachometer provided in the automobile 10 itself. By this adjustment, the level of the ignition noise obtained by the pickup clip 20 is adjusted to trigger the first one-shot multivibrator 42. And car 10
While actually driving the vehicle, the rotation speed signal, the brake signal, the speed signal, and the stop instruction signal are recorded as audio signals of the video camera 12. Where of the camcorder 12
The signal recorded on the Rch includes information on the rotation speed signal according to the period of the signalless section of the A1 modulated carrier wave and the brake signal due to switching between the first and second frequency signals. Also,
The Lch signal includes the speed signal according to the period of the signalless section of the A1 modulated carrier wave and the information of the stop instruction signal by switching between the first and second frequency signals.

In order to display the signal thus recorded in the form of a graph, first, the reference signal is selected by the changeover switch 98 of the regenerator 90, the third variable resistor 106 is adjusted, and the number of cylinders of the engine 16 of the automobile 10 is adjusted. The engine speed is displayed on the second engine speed display means 108 to adjust the output of the second D / A conversion circuit 104 for the cycle of the pulse included in the reference signal. This is to correct the difference in the number of ignition noises obtained by one revolution of the engine 16 depending on the number of cylinders. Instead of the correction by the third variable resistor 106, the output pulse of the first 5 KHz miss pulse detector 100 is divided by the variable frequency divider according to the number of cylinders, and the second D / A is used.
It may be given to the conversion circuit 104. Similarly, the fourth variable resistor 126 is adjusted to display the speed corresponding to the outer diameter of the tire 24 on the speed display means 128, and the third D / A for the cycle of the pulse included in the reference signal is displayed. The output of the conversion circuit 124 is adjusted. This is to correct that the mileage per revolution differs depending on the outer diameter of the tire 24.
You should make a list according to the 24 outer diameters. In addition,
Needless to say, the speed to be set differs depending on the number of the marks 26 attached to the tire 24.

Next, the changeover switch 98 is returned so as to select the reproduction signal from the video camera 12, and the graph display means 112 displays a graph simultaneously with the reproduction of the audio signal by the video camera 12. Here, if the monitor switch 138 is turned on at the same time, the period at which sound is interrupted changes depending on the number of revolutions of the engine 16 and the operation of the brake pedal 22 causes 10 KHz.
The voice that switches between 5 KHz and 5 KHz is amplified by the speaker 142, and the running state of the automobile 10 can be grasped by the sound. Then, the graph display means 112 outputs a graph in which the rotation speed signal, the speed signal, the brake signal and the stop instruction signal of the engine 16 as shown in FIG. 6 are displayed on the same time axis. From the correlation of these signals, the driving characteristics of the driver to be inspected can be analyzed while further reproducing the scene captured by the video camera 12 for reference. Then, by measuring the time t from the output of the stop instruction signal to the operation of the brake pedal 22, the reaction speed of the driver to be inspected can be checked. Furthermore, due to changes in the engine 16 speed and speed, etc., the accelerator pedal and brake pedal 22
Various characteristics such as responsiveness to the operation of can be objectively known.

In the above embodiment, the Rch and Lch outputs of the recorder 14 are used as the audio input signals of the video camera 12, but the present invention is not limited to this, and may be recorded on a tape recorder or the like. Further, in order to record four pieces of information on two audio tracks on the magnetic tape of the video camera 12, two pieces of information are superposed on two output signals of Rch and Lch of the recorder 14, respectively. The tape recorder may be used to record each information on one track on the magnetic tape. Further, when two pieces of information are superimposed on one output signal, the rotation speed signal and the stop instruction signal may be combined, and the speed signal and the brake signal may be combined. And
In the regenerator 90, the means for separating the respective information from the Rch and Lch reproduction signals is not limited to the above embodiment, and may be configured by using an appropriate filter and detection means. Also,
The first, second, and third frequency signals are not limited to 10 KHz, 5 KHz, and 18 KHz, and may be set appropriately, and the predetermined frequencies of the miss pulse detectors 100, 102, 120, 122 may be set according to these frequencies. In addition, graph display means
As for 112, it is sufficient that each signal can be displayed on the same time axis, and a graph may be displayed using a CRT or the like. Also, the method of detecting the engine speed and the vehicle speed of the engine 16 is not limited to the above-described embodiment, and an existing meter or the like may be used in the automobile 10, or may be detected by another appropriate method. Further, it goes without saying that the shooting and recording of the scene in front of the automobile 10 is not limited to the video camera 12.

(Effects of the Invention) Since the operating state recording / reproducing apparatus of the present invention is configured as described above, it has the following effects.

The engine speed, brake signal, speed signal, and stop instruction signal obtained by actually driving the car are recorded on magnetic tape, and these signals are displayed graphically on the same time axis. It is possible to analyze the driving skill and driving temperament of the inspected driver from
It is useful as basic data for improving driving skills and safety measures. Furthermore, it is possible to analyze various characteristics such as the responsiveness of the speed change of the automobile used for the inspection from the change of the engine speed and the operation of the brake pedal.
Moreover, since the stop instruction lamp is turned on and the stop instruction signal is displayed in a graph together with the brake signal, the time from when the stop instruction lamp is turned on to when the brake pedal is operated can be measured. It is possible to know the reaction speed of the test driver.

In addition, if you record and record the engine speed signal and speed signal at the same time as the front view seen from the car, you can see the image later and refer to the road conditions etc. to drive more appropriately. Can be analyzed and considered.

Furthermore, if a video camera is used as the photographing / recording means and four signals are recorded in the audio signal recording portion, an existing one can be used as the magnetic recording means, and the entire apparatus can be manufactured inexpensively and easily.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an outline at the time of recording of an operating state recording / reproducing apparatus of the present invention, and FIG. 2 is a block circuit diagram of an embodiment of the recording machine of FIG. FIG. 4 is a block circuit diagram of an embodiment of a regenerator used at the time of regenerating the operating condition recording / reproducing apparatus of the present invention. FIG. 4 and FIG.
FIG. 6 is a time chart showing the signal waveforms of the respective parts of the recorder and the reproducer to explain the operation, and FIG. 6 is a diagram showing an example of a graph display obtained from the graph display means. 10: Car, 12: Video camera, 14: Recorder, 20: Pickup clip, 23: Switch that turns on / off by operating the brake pedal, 28: Optical sensor, 32: Switch for starting stop instruction signal output means, 34: Lamp for stop instruction, 72: stop instruction signal output means, 90: regenerator, 112: graph display means.

Claims (3)

[Claims] 1. A rotation speed detecting means for outputting a rotation speed signal according to a rotation speed of an engine of a vehicle, a brake pedal operation detecting means for outputting a brake signal according to an operation of a brake pedal, and a running speed of the vehicle. A speed detecting means for outputting a speed signal corresponding to the speed detecting means, a stop instruction signal outputting means for lighting a stop instruction lamp and outputting a stop instruction signal after a lapse of a predetermined time from a switch operation, and the four signals simultaneously on a magnetic tape. Magnetic recording means for recording,
An operating condition recording / reproducing apparatus, comprising: a graph displaying unit for displaying the four signals reproduced from the magnetic recording unit on the same time axis. 2. The driving condition recording / reproducing apparatus according to claim 1, wherein when the four signals are recorded on a magnetic tape by the magnetic recording means, a photographing recording means for photographing and recording a front view seen from an automobile at the same time. An operating condition recording / reproducing apparatus comprising: 3. The driving state recording / reproducing apparatus according to claim 2, wherein a video camera is used as the photographing / recording means.
An operating condition recording / reproducing apparatus, characterized in that the one signal is recorded as two signals including two pieces of information in respective audio signal recording portions of Rch and Lch of the video camera.