JPS6283736A - Stroboscope device having measuring timing signal extracting function - Google Patents

Abstract

PURPOSE:To make the light emission of stroboscope flash coincident to a measuring timing signal by providing a switching means to supply the electric energy with the collision of an object to be measured and the means to output a signal to show the time of collision of the object to be measured based upon the electric energy. CONSTITUTION:When the electric energy is outputted from the first stroboscope circuit 5, a photocoupler 7 makes the electric energy into the energy of low electric power which can with stand even by an IC circuit, and thereafter, outputs the collision timing signal for the electric measurement from a single shot circuit 9. The photocoupler 7, a D flip-flop 8 and a single shot circuit 9 are equivalent to the signal output means, when a set switch 10 is turned on, a RS flip-flop 11 resets the D flip-flop 8, makes an output preparation for the signal for the electric measurement, and the RS flip-flop 11 sets other D flip-flop 12 and lights up a standby pilot lamp 13 and informs that the test preparation is completed. Thus, the measuring timing is coincident and the correct test data analysis can be executed.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a strobe device having a measurement timing signal extraction function, and more specifically, it is used for collision tests of objects to be measured such as automobiles. The present invention relates to a strobe device having a measurement timing signal extraction function for extracting a measurement timing signal of time.

BACKGROUND ART In general, in collision tests for automobiles, etc., optical measurement means such as high-speed cameras, and electrical measurement means such as data recorders and electromagnetic oscilloscopes are used to determine the state of the collision.

Conventionally, in this type of test, the tests shown in FIGS. 5(a) to 5(c), for example, have been considered. FIG. 5(a) is a schematic diagram showing a car and a switch for detecting a collision. As shown in the figure, there are two tape-shaped switches 93 and 94 (hereinafter referred to as tape switches) on the barrier 92 that the car 91 collides with. ) is a fixture. The tape switches 93 and 94 have a rectangular shape as shown in the front view of FIG. 5(b). As shown in the schematic diagram of FIG. The battery power supply 97 is connected to two data recorders (not shown) and one data recorder via a terminal terminal 98.
It is supplied to the electromagnetic oscilloscope on the stand.

That is, in the test configured as described above, when the car 91 collides, the tape switches 93 and 94 are turned on, the strobe flash 96 is emitted, the high-speed camera removes the car 91, and the data recorder and A car 91 is observed using an electromagnetic oscilloscope.

[Problems to be Solved by the Invention] However, in the test configured as described above, there were cases where a time lag occurred when the switches 93 and 94 were turned on. For example, the above-mentioned deviation may occur depending on the responsiveness of the switch itself to turn on.
The above-mentioned deviation also occurred when the automobile 91 collided with the barrier 92 not at right angles but obliquely.

As a result, the time lag results in a measurement lag between the optical measuring means and the electrical measuring means, which greatly hinders accurate test data analysis.

Therefore, to solve this problem, it is possible to replace the switches 93 and 94 with a single switch and connect the optical h1 measurement means and the electric measurement means to that switch, but it is not possible to simply connect them in parallel. In some cases, the measurement timings of the optical measurement means and the electric measurement means do not necessarily match, and a practical solution cannot be achieved.

This is because when the switches 93 and 94 are turned on at the time of a collision, the switches repeatedly turn on and off for a minute period due to the mechanical vibration of the contacts, so it is not always possible to judge whether the switches of the optical measurement means and the electric measurement means are on. They do not exactly match, and the above problem occurs.

The present invention has been made in view of the above-mentioned problems, and is designed to control the strobe flash of the optical measuring means so that the measurement timings of the optical measuring means and the electric measuring means match when a measured object such as a car collides. The purpose of this invention is to provide a strobe device that extracts a measurement timing signal that coincides with light emission.

[Means for Solving the Problems] In order to achieve the above object, the present invention has the following configuration as a means for solving the problems. That is, the present invention
As illustrated in the figure, a camera strobe flash M2 for photographing the object to be measured M1, a power storage means M3 for flashing the strobe flash M2, and electrical energy sent from the power storage means M3 to the strobe flash M2. a switching means M4 that switches and supplies the measured object M1 by the collision of the measured object M1;
The gist of the present invention is a strobe device having a measurement timing signal extraction function, characterized in that it is equipped with a signal output means M5 for outputting a signal indicating the time of a collision.

Here, the object to be measured M1 is, for example, a car or the like, and the state of surface collision is to be measured.

The strobe flash M2 is a light for photography that is used as an auxiliary light at night or during the day, and has, for example, a gas-filled discharge tube, and is arranged to illuminate the collision state of the object to be measured. .

The power storage means M3 stores, for example, high-voltage DC electricity in a capacitor, and momentarily discharges the electric energy to the strobe flash M2 to cause flashing.

The switching means M4 is turned on (or turned off) when the object to be measured M1 collides.

The signal output means M5 is configured by, for example, an electronic circuit or the like so as to input the electric energy stored in the power storage means M3 and output a signal clearly indicating the time of collision, such as a square wave.

[Operation] When the object to be measured M1 collides with the switching means M4 provided at the collision site, the electric energy supplied from the power storage means M3 causes the strobe flash M2 to emit light via the switching means M4. Furthermore, based on the electrical energy supplied from the power storage means M3, a signal indicating the time of collision of the object to be measured is outputted from the signal output means M5. That is,
It functions to output a signal indicating the time of collision with the object to be measured, which coincides with the emission of the strobe flash M2.

[Example] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a block diagram showing one embodiment of the present invention, where 1 is 2.
This is a DC power supply circuit consisting of a three-terminal regulator that outputs a next-side voltage of +5V DC, which applies electrical energy to the first strobe circuit 2 and second strobe circuit 3 corresponding to the power storage means M3 to charge the internal discharging capacitor ( charge)
Accumulate. Then, when the tape switch 4 corresponding to the switching means M4 is turned on due to a collision of a car, the accumulated electrical energy is discharged to the first strobe discharge tube 5 or the second strobe discharge tube 6, respectively, and The strobe discharge tube 6 emits light. The first strobe discharge tube 5 is used to emit light from a strobe of a high-speed camera for the side of a vehicle, and the second strobe discharge tube 6 is used to emit a strobe of a high-speed camera for the bottom of a vehicle. On the other hand, when electrical energy is output from the first strobe circuit 5, the photocoupler 7 converts the electrical energy into a low-power one that can withstand even an IC circuit, and then passes it through the D flip-flop 8 to the single shot circuit 9. A collision timing signal for electrical measurement (hereinafter referred to as electrical measurement signal) is output. Note that the photocoupler 7, D flip-flop 8, and single shot circuit 9 correspond to the signal output means M5. Further, in this embodiment, a set switch 10 is provided, and when the set switch 10 is turned on, the RS flip-flop 11 resets the D flip-flop 8 and prepares for outputting the electrical measurement signal, and also outputs the RS flip-flop 70. 11 sets another D flip-flop 12 and turns on a standby indicator light 13 to notify that test preparations are complete.

Further, when there is an output signal from the single shot circuit 9, the D flip-flop 12 is reset and the standby indicator lamp is turned off to notify that the test has been completed.

Next, a more specific circuit configuration example will be explained.

In the circuit diagram of FIG. 3, the RS flip-flop 11 is composed of two NAND gates, and the input side from the set switch 10 is pulled up by a resistor R1 and a resistor R2. Before the set switch 10 is pressed, the contact is on the 1loa side of the 1st NAND.
The output terminal 10b of the D gate 10a is at a high level, and the second N
The output terminal 10d of the AND gate 10c is at a low level. Next, when the set switch 10 is pressed, the contact becomes the second NAND gate 10c, the output terminal 10b becomes low level, and the output terminal 10d becomes high level. As a result, the clear terminal (CLR) of the D flip-flop 8 also goes to level 1, resets the knob 8 of the D flip-flop 70, and sets its output terminal Q to the low level. At the same time, the clock input terminal (CK) of the D flip-flop 12 also goes high, the D flip-flop 12 becomes set, and its output terminal Q rises from low level to high level. By inputting this high-level voltage to the base terminal of the transistor TR1 via the resistor R3 and switching on the transistor TR1, a current flows to the standby indicator light 13 made of a light emitting diode via the resistor R4, and the standby indicator light is turned on. 13 is lit. Next, when the test starts and the car collides, the voltage increase due to the electrical energy output from the first strobe circuit 2 is transmitted through the conductor 21, and the resistance R
At step 5, the transistor TR2 is switched on via the resistor R6 while matching with the next stage circuit.

The photo coupler 7 is composed of a light emitting diode 7a and a photo transistor 7b, and the photo coupler 7 is composed of a light emitting diode 7a and a photo transistor 7b.
Since the light emitting diode 7a is in the switched on state, the light emitting diode 7a
A current flows through it and it emits light. Then, the light is received by the phototransistor 7b, and the phototransistor 7b is turned on.

As a result, a pulled-down voltage is applied to the resistor R8, and in response to this voltage, the transistor TR3 is switched on. As a result, the level between the transistor TR3 and the resistor R9 changes from high level to low level. As a result, the input of the Schmitt trigger IC 22 changes from high level to low level, and the output of this Schmitt trigger IC 22 changes from low level to high level. By inputting this change to the clock terminal (CK) of the D flip-flop 8, the output terminal (Q) of the D flip-flop 8 is changed from low level to high level, and input to the single shot circuit 9 via the NOT circuit 23. The terminal (A1) is changed from high level to low level. The single shot circuit 9 receives the falling edge of the pulse when the input changes from high level to low level, and outputs only one pulse whose pulse width is arbitrarily adjusted from the output terminal.

Note that the above arbitrary pulse width is determined by the capacitor C1 and resistor R1.
0, and the time constant of the variable resistor R11. The output of the output terminal (Q) of the single shot circuit 9 is normally at a high level, and when the falling edge of the input pulse is detected, it becomes a low level for one pulse and returns to a high level again. One pulse is inverted and waveform-shaped by the Schmitt trigger circuit 24 and applied to the electrical measurement signal output terminal. The applied signal is one square wave pulse 30 as shown in the graph of FIG. That is, in FIG. 4(a), the rise time of the square wave pulse 30 indicates the moment of the car collision.

Therefore, if an automobile floor acceleration sensor, for example, is used as an externally connected device, data 31 as shown in FIG.
However, the time of collision cannot be known; by extracting the square wave pulse 30, the time of collision can be accurately determined.

At the same time, the output terminal of the single shot circuit 9 (
When a low level pulse is output from Q) and changes the clear terminal (CLR) of the D flip-flop 12 from high level to low level, the D flip-flop 12 enters the reset state, and the output terminal Q of the D flip-flop 12 changes from high level to low level. Changes to In response to this, the transistor TRI is switched off via the resistor R3, and the current that has been flowing through the resistor R4 and the standby indicator lamp 13 stops flowing, and the standby indicator lamp 13 goes out.

The strobe device having the measurement timing signal extraction function of this embodiment has been described above in detail.
By configuring the two set switches 10 to detect a car collision, it is possible to prevent a lag in the collision detection time due to differences in the detection response of the switches, and the car collision direction is not perpendicular but diagonal. It is possible to prevent a shift in collision detection time due to a collision. Furthermore, labor and man-hours during test preparation can be reduced, resulting in lower costs and improved work efficiency.

Also, the first strobe light emitting tube 2 and the second strobe light emitting tube 3
By configuring the timing signal for electrical measurement to be taken out at the same timing as the light emission of The measurement timing matches that of the test data, enabling accurate test data analysis.

In this embodiment, since the electrical measurement signal to be output is a single shot pulse determined by setting an arbitrary time constant, it can be clearly distinguished from noise, and test data analysis is easy.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments in any way, and it goes without saying that it can be implemented in various forms without departing from the gist of the present invention.

[Effects of the Invention] As described in detail above, according to the strobe device having the measurement timing signal extraction function of the present invention, a collision of an object to be measured is detected by one switching means, and an electric wire is connected from the power storage means to the strobe flash. At the same time as sending energy,
The structure is configured to output a signal indicating the time of collision of the object to be measured based on the supplied electrical energy, so that the optical measurement means using a strobe flash and the electric measurement means using the signal indicating the time of collision can be combined. The measurement timing matches, allowing accurate test data analysis.

Further, by making the signal indicating the time of collision a single shot pulse determined by setting an arbitrary time constant, it can be clearly distinguished from noise, and test data analysis is easy.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a configuration example of the present invention, FIGS. 2 to 4 (b) show an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of this embodiment, The figure is a circuit diagram showing its specific configuration, Figure 4 (a) is a graph representing the electrical measurement signal output from it, Figure 4 (b) is a graph representing the output of the floor acceleration sensor and the moment of collision, and Figure 5 Figures (a) to 5 (c) are schematic diagrams showing the conventional test configuration, and Figure 5 (a) is a schematic diagram showing a conventional test vehicle and a switch that detects a collision. (B) is a front view showing the tape switch, and Figure 5 (
C) is a schematic diagram showing a configuration for emitting light from the strobe flash and outputting an electrical measurement signal. Ml...Object to be measured M2...Strobe flash M3...Power storage means M4...Switching means M5...Signal output means 1...DC power supply circuit 2...First strobe circuit 3...・Second strobe circuit 4...Tape switch 5...First strobe light bulb 6...Second strobe light bulb 7...Photocoupler 8.12...D flip-flop 9...Single shot Circuit 10...Set switch

Claims (1)

[Scope of Claims] A strobe flash for a camera for photographing an object to be measured, a power storage means for flashing the strobe flash, and an electric energy sent from the power storage means to the strobe flash to be used when the object to be measured collides with the strobe flash. and a signal output means for outputting a signal indicating the time of collision of the object to be measured based on the supplied electric energy. Strobe device.