KR20110137715A - Vehicle crash simulation test apparatus and method, and control system for vehicle crash simulation test apparatus - Google Patents

Abstract

PURPOSE: A vehicle crash simulation test apparatus and method, and a control system for the vehicle crash simulation test apparatus are provided to improve simulating performance by setting a push starting position of a piston based on data obtained from an actual vehicle crash test. CONSTITUTION: A vehicle crash simulation test apparatus comprises a sled(11), a hydraulic cylinder(22), an accumulator(23), a servo valve(24), and a push starting position setting unit. The sled, in which a test piece(15) is mounted, is supported and moved in the longitudinal direction. The hydraulic cylinder is formed with a piston(32) to be pushed toward the sled. The accumulator is connected to the rear chamber of the hydraulic cylinder. The servo valve is provided in a discharge port(45) formed in the front chamber of the hydraulic cylinder. The push starting position setting unit has a control device(26) for regulating the opening degree of the servo valve and sets the push starting position of the piston based on data obtained from an actual vehicle crash test.

Description

VEHICLE CRASH SIMULATION TEST APPARATUS AND METHOD, AND CONTROL SYSTEM FOR VEHICLE CRASH SIMULATION TEST APPARATUS

The present invention relates to an automobile collision simulation test apparatus and method for reproducing acceleration generated in a cabin during a collision without destroying the vehicle, and to reproduce the degree of injury of the occupant due to the secondary collision, and an automobile collision simulation test apparatus. It relates to a control device.

In general, a crash test of a vehicle includes a crash test for evaluating physical quantities such as a crash amount and a remaining amount of space in a cabin and a passenger injury value, but a dummy is mounted on a vehicle at a predetermined speed. The method of impinging on a barrier is a fracture test, which is expensive. Therefore, by attaching a dummy in a dummy, an air bag, or the like, a body in white, a simulated car body, and the like to the vehicle, and giving the vehicle almost the same acceleration as in the actual vehicle collision, Vehicle collision simulation tests are performed to develop a safety device such as an airbag by evaluating the occupant injury value by non-destructively reproducing the impact level.

As such a vehicle collision simulation test apparatus, there exist some which were described in following patent document 1, for example. In the servo actuator device in the automobile collision simulator described in the patent document 1, the piston of the hydraulic actuator is directed toward the sled on which the specimen is mounted by the hydraulic oil accumulated and accumulated in the accumulator. The meter-out circuit is configured by being configured to be pushable, connecting an accumulator so that hydraulic oil flows directly into the hydraulic actuator, and connecting a servovalve to control hydraulic oil flowing out of the hydraulic actuator.

Japanese Unexamined Patent Publication No. 2002-162313

In the above-described servo actuator device in the automobile crash simulator, the servo valve is opened and the hydraulic oil in the hydraulic actuator is discharged to push the piston of the hydraulic actuator with the hydraulic oil accumulated and accumulated in the accumulator, and the specimen is mounted. Acceleration is given to the sled. In this case, the push stroke of the piston in the hydraulic actuator is set based on various data obtained by the actual vehicle crash test.

By the way, in the automobile crash simulation test, high reproducibility close to the actual vehicle crash test is required. In order to secure such high reproducibility, it is necessary to increase the oil column stiffness of the oil filled in the hydraulic actuator, but this oil column stiffness is due to the piston hydraulic pressure area and the piston stroke in the hydraulic actuator. It is difficult to improve the oil column rigidity.

An object of the present invention is to provide a vehicle collision simulation test apparatus and method and a control apparatus for a vehicle collision simulation test apparatus capable of improving reproducibility.

An automobile collision simulation test apparatus of the present invention for achieving the above object includes a sled capable of being movable along a horizontal front and rear direction and mounting a specimen, a fluid cylinder capable of pushing a piston toward the sled, and An accumulator connected to the rear chamber side of the fluid cylinder, a servo valve provided at the discharge port formed on the front chamber side of the fluid cylinder, and a push start for setting the push start position of the piston based on data obtained in an actual vehicle crash test It is characterized by including a positioning means.

Therefore, by setting the push start position of the piston based on the data obtained in the actual vehicle crash test, in the specimen with a short push stroke of the piston, the push start position of the piston can be set to the front side, and the oil column rigidity is increased. The reproducibility in the automobile crash simulation can be improved.

In the vehicle collision simulation test apparatus of the present invention, the push start position setting means has a control device that can adjust the valve opening degree of the servovalve, and the control device is configured to control the servovalve when the piston is in the initial position. The valve opening degree is set to a predetermined predetermined predetermined opening degree, and when the piston reaches the push start position, the valve opening degree of the servo valve is set to a predetermined predetermined test opening degree.

Therefore, the piston can be easily set to the predetermined push start position only by controlling the valve opening degree of the servovalve without changing the apparatus configuration substantially.

In the automobile collision simulation test apparatus of the present invention, the control apparatus estimates the time for the piston to reach the push start position based on the hydraulic pressure of the piston and the valve opening degree of the servo valve. When the piston reaches the push start position, the servo valve is set to the test opening degree.

Therefore, the piston can be set with high precision at a predetermined push start position without adding a new device.

In the vehicle collision simulation test apparatus of this invention, the position sensor which detects the push start position of the said piston is provided, and the said control apparatus determines that the said piston reached the push start position based on the detection result of the said position sensor. The servo valve is set to a test opening degree.

Therefore, only by controlling the valve opening degree of a servovalve based on the detection result of a position sensor, a piston can be set to a predetermined push start position with high precision.

In the vehicle collision simulation test apparatus of the present invention, the push starting position setting means has a position restraining member for restraining the piston at the push starting position with respect to the fluid cylinder, and the piston is placed at the push starting position by the position restraining member. The fluid is supplied to the fluid cylinder and the accumulator in a confined state.

Therefore, by using the position restraint member, the piston can be easily set at the predetermined push start position without performing special control.

In addition, the vehicle collision simulation test method of the present invention pressurizes by supplying a fluid to an accumulator and a hydraulic cylinder communicating with the accumulator when the piston of the fluid cylinder is in an initial position, and finely fluids the fluid from the front chamber side of the fluid cylinder. Moving the piston to the push start position by discharging, and pushing the piston toward the sled on which the specimen is mounted by discharging a large amount of fluid from the front chamber side of the fluid cylinder when the piston reaches the push start position. It is to be done.

Therefore, by easily setting the piston at a predetermined push start position, in a specimen having a short push stroke of the piston, the push start position of the piston can be set on the front side, and the oil column stiffness is increased for the automobile crash simulation test. The reproducibility in it can be improved.

In addition, the vehicle collision simulation test method of the present invention restrains the piston of the fluid cylinder at the push start position, and pressurizes by supplying a fluid to the accumulator and the hydraulic cylinder connected to the accumulator when the piston is at the push start position. And pushing the piston toward the sled on which the specimen is mounted by discharging a large amount of fluid from the front chamber side of the fluid cylinder. Therefore, in the specimen with a short push stroke of the piston, the push start position of the piston can be set on the front side, and the reproducibility in the automobile crash simulation can be improved by increasing the oil column rigidity.

Moreover, the control apparatus for automobile collision simulation apparatus of this invention is the sled which can be supported to move along a horizontal front-back direction, and can mount a specimen, the fluid cylinder which can push a piston toward the said sled, and the said fluid cylinder A vehicle collision simulation test apparatus comprising an accumulator connected to a rear chamber side of an engine and a servo valve provided on an exhaust port formed on a front chamber side of the fluid cylinder, wherein the valve of the servo valve when the piston is in an initial position. The opening degree is finely opened, and the valve opening degree of the servovalve is completely opened when the piston reaches a preset push start position. Therefore, in the specimen with a short push stroke of the piston, the push start position of the piston can be set on the front side, and the reproducibility in the automobile crash simulation can be improved by increasing the oil column rigidity.

According to the automobile collision simulation test apparatus and the method of the present invention, and the control apparatus for the automobile collision simulation apparatus, the push start position of the piston is set based on the data obtained in the actual vehicle collision test. The reproducibility in the simulation test can be improved.

1 is a schematic configuration diagram showing a vehicle collision simulation test apparatus according to Example 1 of the present invention;
2 is an explanatory diagram for setting a push start position of a piston in the automobile crash simulation apparatus of Example 1;
3 is a time chart for explaining a test method in the vehicle collision simulation test apparatus of Example 1;
4 is an operation diagram showing a test method by the vehicle collision simulation test apparatus of Example 1;
5 is an operation diagram showing a test method using the vehicle collision simulation test apparatus of Example 1;
6 is an operation diagram showing a test method by the vehicle collision simulation test apparatus of Example 1;
7 is an operation diagram showing a test method by the vehicle collision simulation test apparatus of Example 1;
8 is a schematic block diagram showing a vehicle collision simulation test apparatus according to the second embodiment of the present invention;
9 is a schematic block diagram showing a vehicle collision simulation test apparatus according to the third embodiment of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, with reference to an accompanying drawing, preferred embodiment of the vehicle collision simulation test apparatus and its method which concerns on this invention, and the control apparatus for vehicle collision simulation test apparatus is described in detail. The present invention is not limited to these examples.

Example 1

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram which shows the automobile collision simulation test apparatus which concerns on Example 1 of this invention, FIG. 2 is explanatory drawing which sets the push start position of the piston in the automobile collision simulation test apparatus of Example 1, FIG. 4 is a time chart for explaining the test method in the vehicle collision simulation test apparatus of Example 1, and FIGS. 4 to 7 are operation diagrams showing the test method by the vehicle crash simulation test apparatus of Example 1. FIG.

In the vehicle collision simulation test apparatus of Example 1, as shown in FIG. 1, the sled 11 is a frame member having a plate having a predetermined thickness, and is viewed in a plan view in front and rear directions (in FIG. , Right and left) to form a long rectangular shape. A pair of left and right rails 13 are attached to the bottom surface 12 at predetermined intervals along the front and rear directions, and the rails 13 are passed through a slider 14 fixed to the lower surface by the sled 11. It is supported to move along.

This sled 11 is capable of mounting the specimen 15 on the upper surface. In this embodiment, the specimen 15 is a vehicle having only a skeleton, a so-called white body, in which equipments such as the seat 15a, the steering 15b, the airbag 15c, the seat belt 15d, and the like are mounted. The dummy 15e is mounted. This specimen 15 is mounted at a predetermined position in the sled 11 and fixed by a fixture not shown.

In addition, here, the specimen 15 is a white body and includes the seat 15a, the steering 15b, the airbag 15c, the seat belt 15d, the dummy 15e, etc. 15b, the airbag 15c, the seat belt 15d, and the dummy 15e may be called a specimen by itself.

In addition, in this embodiment, since the specimen 15 is mounted on the sled 11, the front of the vehicle which is this specimen 15 (the left direction in FIG. 1) is moved to the front of the sled 11. The rear of the vehicle (the right direction in FIG. 1), which is the specimen 15, will be described as the rear of the sled 11. In addition, the side of a vehicle which is the specimen 15, ie, the left-right direction (up-down direction in FIG. 1), is demonstrated as the side of the sled 11, ie, the left-right direction.

On the bottom face 12 of the front side of the sled 11, the launching device 21 as an acceleration device which gives back acceleration with respect to the sled 11 is provided. This launch device 21 is capable of hydraulic control (or pneumatic control, friction control, etc.). This launch device 21 has a hydraulic cylinder (fluid cylinder) 22, an accumulator 23, a servo valve 24, a hydraulic pressure source 25, and a control device 26. .

In addition, in the present embodiment, since the launching device 21 (hydraulic cylinder 22) imparts rearward acceleration on the sled 11, the sled 11 side of the launching device 21 is moved. The front side (in FIG. 1, right direction) will be described, and the side opposite to the sled 11 will be described as the rear of the launch device 21 (in FIG. 1, left direction).

That is, the bottom face 12 of the front side of the sled 11 is made low by the level | step difference, and the hydraulic cylinder 22 is provided in this low bottom face 12. As shown in FIG. The hydraulic cylinder 22 is comprised from the cylinder main body 31 which has a hollow cylindrical shape, and the piston 32 supported by this cylinder main body 31 so that a movement is possible. In addition, the piston 32 is connected to a land 32a that is movably fitted to the inner circumference of the cylinder body 31 and to a land 32a while penetrating in the center axial direction of the cylinder body 31. It consists of the piston rod 32b which becomes. In this case, the piston 32 (piston rod 32b) has its rear end projecting outward from the cylinder body 31, but is covered by a case 33 fixed to the cylinder body 31. As shown in FIG. In addition, the front end of the piston 32 (piston rod 32b) protrudes outward from the cylinder main body 31, and is extended to the sled 11 side. Seal members 34 and 35 are attached between the cylinder body 31 and the piston 32 (piston rod 32b).

In addition, although the piston 32 (land 32a) partitions the inside of the cylinder main body 31 by the chambers A and B of the front-back part, it is minute between the outer peripheral surface of the land 32a, and the inner peripheral surface of the cylinder main body 31. FIG. A gap is set, and it is possible to distribute hydraulic oil at a slow speed. In addition, the outer diameter of the land 32a on the front chamber A side is set slightly smaller than the outer diameter of the land 32a on the rear chamber B, and the land 32a is on the front chamber A side. The hydraulic pressure area is larger than the hydraulic pressure area on the rear chamber B side. Therefore, when the hydraulic pressure of the same pressure is supplied to chamber A, B, the piston 32 (land 32a) is pressurized toward the rear side (left side in FIG. 1).

Although one accumulator 23 is shown in FIG. 1, a plurality of accumulators 23 are arranged around the hydraulic cylinder 22. The accumulator 23 is composed of a housing 36 having a hollow cylindrical shape, and a partition wall 37 movably supported by the housing 36, the front end of which is fixed to the rear portion of the hydraulic cylinder 22. It is. The partition wall 37 partitions the inside of the housing 36 into chambers C and D in the front and rear portions, and the front chamber C is the rear chamber B of the hydraulic cylinder 22 through the communication path 38. In communication with In addition, the rear chamber D is a sealed chamber, in which nitrogen gas as an inert gas is sealed.

The hydraulic cylinder 22 is provided with the supply port 39 which is located in the communication path 38 of a rear part, and can supply hydraulic oil from the exterior. Therefore, by supplying hydraulic oil from the supply port 39, it is possible to fill the hydraulic chamber 22 with the rear chamber B, the front chamber A and the front chamber C of the accumulator 23, At this time, the partition wall 37 retreats and the nitrogen gas in the rear chamber D is compressed, so that the high pressure oil can be accumulated in the hydraulic cylinder 22 and the accumulator 23.

In addition, although there is one hydraulic cylinder 22 in FIG. 1, the some servo valve 24 is attached to the front part. The servovalve 24 is a solenoid valve which can adjust the valve opening degree, the hollow casing 41, the valve body 42 movably supported in the casing 41, and the valve body 42. It is comprised by the drive part 43 which can move. The servo valve 24 can communicate with and block the discharge port 44 which opens to the front chamber A of the hydraulic cylinder 22, and the discharge port 45 which can supply hydraulic oil from the exterior. Therefore, when the valve body 42 is moved to the closed position by the drive unit 43, the discharge port 44 and the discharge port 45 can be shut off, and the valve unit 42 is opened by the drive unit 43. When moved to the open position, the outlet port 44 and the discharge port 45 can communicate with each other, and at this time, the hydraulic fluid filled in the front chamber A of the hydraulic cylinder 22 is discharged from the discharge port 45 to the outside. Can be discharged.

In the hydraulic cylinder 22, a flange portion 51 is integrally formed at the front end protruding from the cylinder body 31 in the piston 32, and the flange portion 51 is a cylinder body ( By contacting 31, the retracted position (initial position to be described later) of the piston 32 is defined. Moreover, in front of the hydraulic cylinder 22, the restraining member 52 which restrains the piston 32 to this retreat position corresponding to the front end of the piston 32 is provided. The restraint member 52 forms a pair up and down, and the air cylinder 53 makes it possible to restrain the front side of the flange part 51 in the piston 32. In addition, the air supply / discharge apparatus 54 is connected to this air cylinder 53.

The hydraulic pressure source 25 is comprised from the accommodating tank 61, the supply pump 62, the cooling device 63, etc. The storage tank 61 is connected to the discharge port 45 via the discharge pipe 64, and the hydraulic oil in the front chamber A of the hydraulic cylinder 22 is discharged from the discharge port 45 to the discharge pipe 64. Recoverable through The supply pump 62 is connected to the supply port 39 via the supply pipe 65, and the hydraulic cylinder 22 and the hydraulic fluid in the receiving tank 61 are supplied from the supply pipe 65 through the supply port 39. It can be supplied into the accumulator 23.

The control device 26 is capable of controlling the servovalve 24, and receives the operation signal from the driving and operating device 27 to perform the opening and closing control and the opening degree adjustment control of the servovalve 24. In addition, the control device 26 can operate the restraining member 52 by operating the air cylinder 53 via the air supply / discharge device 54. In this case, the control device 26 receives a restraining / releasing signal from a sensor (not shown) provided in the restraining member 52.

Therefore, in the state which closed the servo valve 24 and restrained the piston 32 of the hydraulic cylinder 22 to the initial position by the restraining member 52, the receiving tank 61 by the supply pump 62 is carried out. The hydraulic oil in the inside is supplied from the supply pipe 65 to the chambers A and B of the hydraulic cylinder 22 and the front chamber C of the accumulator 23 through the supply port 39. Then, the chambers A and B of the hydraulic cylinder 22 and the front chamber C of the accumulator 23 are pressurized, and when the predetermined high pressure is reached, the operation of the supply pump 62 is stopped. When the servo valve 24 is opened in such a high pressure state, the hydraulic oil in the front chamber A of the hydraulic cylinder 22 flows from the discharge port 45 to the accommodation tank 61 through the discharge pipe 64. By being recovered, the piston 32 of the hydraulic cylinder 22 is forward (sled 11 side) by the pressure of the rear chamber B of the hydraulic cylinder 22 and the front chamber C of the accumulator 23. ] Can be pushed.

Therefore, the launching device 21 pushes the piston 32 in the state in which the tip of the piston 32 is in contact with the front end of the sled 11, so that the launching device 21 is moved backward with respect to the sled 11. Impact force, that is, acceleration can be given. In other words, imparting the rear acceleration to the sled 11 by the launching device 21 is the same as receiving the front acceleration when the specimen 15 on the sled 11 collides forward, and simulates It can cause a car crash.

In the vehicle collision simulation test, as described above, the hydraulic cylinder 22 and the accumulator 23 are brought into a high pressure state, and the servo valve 24 is opened to operate the hydraulic fluid in the front chamber A of the hydraulic cylinder 22. By discharging, the piston 32 is pushed to impart rearward acceleration to the sled 11 to simulate an automobile crash accident. In this case, the push stroke of the piston 32 by the launching device 21 is set based on the data obtained by the actual vehicle crash test, but fluctuates according to the mass of the specimen 15 and the like. For example, the specimen 15 having a large mass has a long push stroke of the piston 32, and the specimen 15 having a small mass has a short push stroke of the piston 32.

On the other hand, in the automobile crash simulation test, in order to ensure high reproducibility close to the actual vehicle crash test, it is necessary to increase the oil column stiffness of the hydraulic oil filled in the front chamber A of the hydraulic cylinder 22. The column stiffness is attributable to the hydraulic pressure area of the land 32a and the stroke of the land 32a (piston 32), and can be obtained by the following equation. Here, K is the oil column rigidity, A is the hydraulic pressure area, L is the stroke, and β is the physical property value (volume elastic modulus) of the hydraulic oil.

K = (A / L) β

In this case, since the hydraulic pressure area A of the land 32a and the physical property value (volume elastic modulus) β of the hydraulic oil are constant values, the stroke of the land 32a (piston 32) is increased in order to increase the oil column rigidity. It is good to make (L) small. That is, in the hydraulic cylinder 22, since the maximum stroke of the land 32a (piston 32) is set with respect to the largest mass specimen 15 which can perform a collision simulation test, the small mass specimen 15 When the collision simulation test is performed on the push stroke of the land 32a (piston 32), the push stroke is shortened.

Here, in Example 1, the push stroke of the piston 32 is set based on the data obtained by the actual vehicle crash test, and the push start position of a piston is set according to this push stroke. Specifically, in accordance with the push stroke of the piston 32 set based on the data obtained in the actual vehicle crash test, the piston 32 is moved from the initial position to the forward side and stopped at the push start position, and from this advanced push start position. Collision simulation tests are to be carried out. In this case, since the push stroke of the piston 32 becomes short for the specimen 15 with small mass, the stroke of the land 32a (piston 32) mentioned above is shortened, and the oil column rigidity K becomes high, High reproducibility in the collision simulation test can be ensured.

Here, the vehicle collision simulation test method by the automobile collision simulation test apparatus of Example 1 mentioned above is demonstrated.

When the vehicle collision test is carried out by the vehicle collision simulation test apparatus of Example 1, the angle of the acceleration change with respect to the collision time obtained by the design data (weight or center position, etc.) of the sled 11 in advance, and the actual vehicle collision test From the data, the push start position of the piston 32 of the hydraulic cylinder 22, the push force of the piston 32, and the sled so that the temporal change (waveform) of this acceleration can be reproduced. The position of the specimen 15 on (11) is set to a predetermined value.

In this case, the push start position of the piston 32 is set based on the data obtained by the actual vehicle crash test. In this embodiment, the push start position of the piston 32 is calculated based on the acceleration data obtained by the actual vehicle crash test.

That is, as shown in FIG. 2, when the data of the acceleration G with respect to the time obtained by the actual vehicle crash test is detected, the data of the speed V is calculated by integrating the data of this acceleration G, and this speed is obtained. The data of the distance L is calculated by further integrating the data of (V). Here, in the data of the acceleration G, since the acceleration G = 0 at time t0, the distance L0 corresponding to this time t0 is the piston 32 in the hydraulic cylinder 22. Is the push distance (stroke) of. In this case, as shown in FIG. 1, since the maximum push stroke La from the initial position of the piston 32 to the stop position is set in the hydraulic cylinder 22, the hydraulic cylinder 22 stops from the push start position of the piston 32. When the push stroke L0 to the position is set, the preparation stroke L1 from the initial position of the piston 32 to the push start position of the piston 32 is set.

When the preliminary stroke L1 and the push stroke L0 of the piston 32 are set in this way, first, as shown in FIGS. 1, 3, and 4, the hydraulic cylinder 22 in the launching device 21 is used. ) Stops the piston 32 at the initial position where the flange portion 51 is in contact with the cylinder body 31, is defined by the restraining device 51 at this initial position, and the servo valve 24 is closed. Shall be. In this state, the operator outputs a driving signal to the control device 26 by the driving operation device 27 at the time t1, and operates the supply pump 62 to supply the hydraulic oil in the storage tank 61. It supplies from the supply port 39 to the hydraulic cylinder 22 and the accumulator 23 through the supply piping 65.

Then, as shown in FIG. 5, the rear chamber B of the hydraulic cylinder 22 and the front chamber C of the accumulator 23 are pressurized by the supplied hydraulic oil, and the hydraulic cylinder 22 is also pressed. The hydraulic oil of the rear chamber B of the gas is transferred to the front chamber A, and this rear chamber B is also pressurized. The nitrogen gas in the rear chamber D of the accumulator 23 is compressed by the hydraulic oil supplied to each of the chambers A, B, and C, and the hydraulic oil of each of the chambers A, B, and C is predetermined. When the pressure is high, the operation of the feed pump 62 is stopped.

Next, from this state, as shown in FIG. 1, FIG. 3, and FIG. 5, an operator outputs a driving signal to the control apparatus 26 by the driving | operation operation apparatus 27 at the time t2, The air cylinder 53 is operated by the air supply / discharge device 54 to release the restraint of the piston 32 by the restraining member 52. Then, when the release signal is input to the driving control device 27, the operator outputs the driving signal to the control device 26 by the driving operation device 27 at the time t3, and the servo valve 24 is predetermined. Opening, that is, finely opening by the opening degree, discharges and recovers the hydraulic oil in the front chamber A of the hydraulic cylinder 22 from the discharge port 45 to the accommodation tank 61 through the discharge piping 64.

Then, as shown in FIG. 3 and FIG. 6, when the pressure in the front chamber A of the hydraulic cylinder 22 slightly decreases, the piston 32 advances to the slow speed, the distance increases, and the sled 11 Retreat into the middle of the back. Here, although the speed V of the sled 11 rises slightly and the acceleration G rises, since the valve opening degree of the servovalve 24 is constant, the speed V of the sled 11 is increased. Becomes constant velocity, and acceleration G becomes zero.

The control apparatus 26 is based on the hydraulic pressure of the piston 32, the valve opening degree of the servo valve 24, and the preparation stroke L1 (push stroke L0) of the set piston 32, and the piston 32 The time to reach the push start position is estimated from the initial position. And when the control apparatus 26 estimates that the piston 32 has reached the predetermined | prescribed push start position, as shown in FIG.3 and FIG.7, the servovalve 24 is fully opened at time t4. Thus, all the hydraulic oil in the front chamber A of the hydraulic cylinder 22 is discharged and recovered from the discharge port 45 to the storage tank 61 through the discharge pipe 64.

Then, the hydraulic cylinder 22 pushes the piston 32 forward, imparts a target back and forth acceleration (backward acceleration in the sled 11 and the specimen 15) to the sled 11 and collides with it. Acceleration simulating a time is given to the specimen 15. Then, the sled 11 moves backwards by a predetermined distance according to the given target back and forth acceleration. At this time, as the piston 32 advances at high speed, the predetermined distance (push stroke L0) increases, and the sled 11 is retracted at high speed. Here, the velocity V of the sled 11 rises at high speed, and the acceleration G rises at high speed.

Thus, in the vehicle collision simulation test apparatus of Example 1, the sled 11 on which the specimen 15 can be mounted is supported to be movable along a horizontal front and rear direction, and acceleration can be applied to the sled 11. As the launching device 21, the hydraulic cylinder 22 which can push the piston 32 toward the sled 11, the accumulator 23 connected to the rear chamber B side of the hydraulic cylinder 22, The servo valve 24 provided in the discharge port 45 formed in the front chamber A of the hydraulic cylinder 22 is provided, and the push start position of the piston 32 is set based on the data obtained by the actual vehicle crash test. Push start position setting means is provided.

Therefore, the push start position of the piston 32 is set based on the data obtained by the actual vehicle crash test, and in the specimen 15 with a short push stroke of the piston 32, the push start position of the piston 32 is moved to the front side. It can be set, the push distance of the piston 32 can be shortened, and the oil column rigidity can be improved, and the reproducibility in the automobile crash simulation test can be improved.

Moreover, in the vehicle collision simulation test apparatus of the present embodiment, as the push start position setting means, a control device 26 capable of adjusting the valve opening degree of the servovalve 24 is provided, and the control device 26 includes a piston 32. ) Is in the initial position, the valve opening degree of the servo valve 24 is set to a predetermined predetermined predetermined opening degree (fine opening), and when the piston 32 reaches the push start position, the servo valve 24 Valve opening degree is set to predetermined predetermined test opening degree (full opening). Therefore, the piston 32 can be easily set to a predetermined push start position only by controlling the valve opening degree of the servovalve 24 without changing the apparatus structure substantially.

In addition, in the automobile collision simulation test apparatus of the present embodiment, the control device 26 reaches the push start position of the piston 32 based on the hydraulic pressure of the piston 32 and the valve opening degree of the servovalve 24. The servo valve 34 is set to the test opening degree when the piston 32 reaches the push start position by estimating the time to be performed. Therefore, the piston 32 can be set to a predetermined push start position with high precision, without adding a new apparatus.

Moreover, in the vehicle collision simulation test apparatus of this embodiment, the control apparatus 26 calculates the push start position of the piston 32 based on the data obtained by actual vehicle collision test. Therefore, the reproducibility in the automobile crash simulation test can be improved.

In the vehicle collision simulation test method of the present embodiment, the chambers A and B of the hydraulic cylinder 22 and the front chamber of the accumulator 23 when the piston 32 of the hydraulic cylinder 22 is in the initial position. It pressurizes by supplying hydraulic fluid to (C), it moves the piston 32 to a push start position by micro-discharging hydraulic fluid from the front chamber A of the hydraulic cylinder 22, and the piston 32 moves to a push start position. When reaching, the piston 32 is pushed toward the sled 11 on which the specimen 15 is mounted by discharging a large amount of hydraulic oil from the front chamber A of the hydraulic cylinder 22. Therefore, by easily setting the piston 32 at the predetermined push start position, in the specimen 15 having a short push stroke of the piston 32, the push start position of the piston 32 can be set on the front side, and the oil By increasing the column rigidity, the reproducibility in the automobile crash simulation test can be improved.

[Example 2]

8 is a schematic configuration diagram showing a vehicle collision simulation test apparatus according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the same function as the Example mentioned above, and detailed description is abbreviate | omitted.

In the automobile collision simulation test apparatus of Example 2, as shown in FIG. 8, the push stroke of the piston 32 in the hydraulic cylinder 22 is set based on the data obtained by the actual vehicle collision test, and this push stroke The push start position of the piston 32 is set accordingly. That is, similarly to Example 1, the push stroke of the piston 32 is set based on the data obtained by the actual vehicle crash test, and the push start position of the piston 32 is set from this push stroke. Then, the piston 32 is moved from the initial position to the push start position, and a collision simulation test is performed from this push start position.

Moreover, in Example 2, the position sensor 71 which detects the position of the piston 32 is provided, and a detection result is input into the control apparatus 26. As shown in FIG. In this case, a detector (not shown) is built in the piston 32, and the position sensor 71 detects the position of the piston 32 by detecting this detector. The control device 26 feeds back the detection result of the position sensor 71 so that the piston 32 compares the push start position with the current position of the piston 32 so that the piston 32 reaches the push start position. The servo valve 24 is set to the test opening degree.

Therefore, first, the piston 32 of the hydraulic cylinder 22 in the launching device 21 is stopped at the initial position, and in this state, the control device 26 operates the feed pump 62 to receive the receiving tank ( The hydraulic oil in each of the chambers A, B, and C is brought into a predetermined high pressure state by supplying the hydraulic oil in the chamber 61 from the supply port 39 to the hydraulic cylinder 22 and the accumulator 23 through the supply pipe 65. .

Next, from this state, the control device 26 opens the servovalve 24 finely, and the hydraulic fluid in the front chamber A of the hydraulic cylinder 22 is discharged from the discharge port 45 to the discharge pipe 64. The discharge is collected to the receiving tank 61 through. Then, the piston 32 advances to the slow speed, and the sled 11 is retracted to the slow speed. The position sensor 71 detects the position of the piston 32 and outputs the detection result to the control apparatus 26. When the control device 26 recognizes that the piston 32 has reached the push start position based on the detection result of the position sensor 71, the control device 26 opens the servovalve 24 completely, All the hydraulic oil in the front chamber A is discharged and recovered from the discharge port 45 to the storage tank 61 through the discharge pipe 64.

Then, the hydraulic cylinder 22 pushes the piston 32 forward, imparts a target back and forth acceleration (backward acceleration in the sled 11 and the specimen 15) to the sled 11 and collides with it. Acceleration simulating a time is given to the specimen 15.

Thus, in the automobile collision simulation test apparatus of Example 2, the push stroke of the piston 32 in the hydraulic cylinder 22 is set based on the data obtained by the actual vehicle crash test, and the piston 32 according to this push stroke. The position sensor 71 which detects the position of the piston 32 while setting the push start position of the piston 32 is provided, and the control apparatus 26 makes the piston 32 based on the detection result of this position sensor 71. It is determined that the push start position has been reached.

Therefore, only by controlling the valve opening degree of the servo valve 24 based on the detection result of the position sensor 71, a piston can be set to a predetermined push start position with high precision, and a test can be performed from this position, The reproducibility in the automobile crash simulation can be improved.

In Examples 1 and 2 described above, the piston 32 is advanced at a slow speed by finely opening the servovalve 24, and when the piston 32 reaches the push start position, the servovalve 24 is completely completed. The piston 32 is pushed forward by opening to give the sled 11 a target back and forth acceleration, but the present invention is not limited to this method. For example, the piston 32 is advanced at a slow speed by finely opening the servo valve 24, and when the piston 32 reaches the push start position, the piston 32 is closed by completely closing the servo valve 24. It stops for a predetermined time. Then, when the vibration of the sled 11 stops (speed or acceleration is zero (zero)) and stabilizes, the piston 32 is pushed forward by fully opening the servovalve 24 to the sled 11. Acceleration before and after the target may be provided.

Example 3

9 is a schematic configuration diagram showing a vehicle collision simulation test apparatus according to the third embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the same function as the Example mentioned above, and detailed description is abbreviate | omitted.

In the automobile collision simulation test apparatus of Example 3, as shown in FIG. 9, the push stroke of the piston 32 in the hydraulic cylinder 22 is set based on the data obtained by the actual vehicle collision test, and this push stroke The push start position of the piston 32 is set accordingly. That is, similarly to Example 1, the push stroke of the piston 32 is set based on the data obtained by the actual vehicle crash test, and the push start position of the piston 32 is set from this push stroke. Then, the piston 32 is moved from the initial position to the push start position, and a collision simulation test is performed from this push start position.

Moreover, in Example 3, the position restraint member 81 which restrains the piston 32 to the push start position with respect to the hydraulic cylinder 22 as a push start position setting means is provided, By this, the hydraulic oil is supplied to the hydraulic cylinder 22 and the accumulator 23 in the state which restrained the piston 32 to the push start position. That is, in the hydraulic cylinder 22, the flange part 51 is formed in the front end part which protruded from the cylinder main body 31 in the piston 32. As shown in FIG. And the position restraint member 81 is interposed between the cylinder main body 31 and the flange part 51 in the state which the piston 32 moved to the push starting position. These position restraining members 81 form a pair up and down, and the air cylinder 53 is able to restrain the front side of the flange part 51 of the piston 32. In addition, an air supply / discharge device 54 is connected to this air cylinder 53.

Therefore, first, the piston 32 of the hydraulic cylinder 22 in the launching device 21 is stopped at an initial position, and the servovalve 24 is brought into an open state. In this state, the control device 26 operates the supply pump 62 to supply hydraulic oil in the receiving tank 61 from the supply port 39 to the hydraulic cylinder 22 and the accumulator 23 through the supply pipe 65. Supply into). At this time, since the servo valve 24 is in the open state, the piston 32 moves forward and the hydraulic oil of the hydraulic cylinder 22 flows from the discharge port 45 to the accommodation tank 61 through the discharge pipe 64. It is recovered.

When the piston 32 reaches the push start position, the servo valve 24 is closed, and the air cylinder 53 is operated by the air supply / discharge device 54 to operate the position restraining member 81. It interposes between the cylinder main body 31 and the flange part 51, and the retraction of the piston 32 is prevented. Then, the back side chamber B of the hydraulic cylinder 22 and the front side chamber C of the accumulator 23 are pressurized by the hydraulic oil supplied continuously, and it becomes a predetermined high pressure state, and the feed pump 62 Stops operation.

Next, from this state, the control device 26 fully opens the servovalve 24 and discharges hydraulic oil in the front chamber A of the hydraulic cylinder 22 from the discharge port 45 to the discharge pipe 64. Through the collection tank 61 to collect all of the discharge. Then, the hydraulic cylinder 22 pushes the piston 32 forward, and gives a target back and forth acceleration (backward acceleration in the sled 11 and the specimen 15) to the sled 11, Acceleration simulating a collision is given to the specimen 15.

Thus, in the automobile collision simulation test apparatus of Example 3, the push stroke of the piston 32 in the hydraulic cylinder 22 is set based on the data obtained by the actual vehicle crash test, and the piston 32 according to this push stroke. While setting the push start position of the hydraulic cylinder 22, a position restraining member 81 is provided to restrain the piston 32 to the push start position with respect to the hydraulic cylinder 22, and the piston 32 is provided by the position restraining member 81. Is supplied to the hydraulic cylinder 22 and the accumulator 23 in a state where the pressure is held at the push start position.

Therefore, by using the position restraint member 81, the piston 32 can be easily set to a predetermined push start position without executing special control.

Moreover, in the automobile collision simulation test method of Example 3, when the piston 32 of the hydraulic cylinder 22 is restrained at the push starting position, and the piston 32 is at the push starting position, the hydraulic cylinder 22 and the accumulator Pressurizing by supplying hydraulic oil to 23, and pushing the piston 32 toward the sled 11 on which the specimen 15 is mounted by discharging a large amount of hydraulic oil from the front chamber A of the hydraulic cylinder 22. Doing. Therefore, in the specimen 15 with a short push stroke of the piston 32, the push start position of the piston 32 can be set to the front side, and the reproducibility in the automobile crash simulation is improved by increasing the oil column rigidity. can do.

In addition, in the above-described embodiment, when the piston 32 of the launching device 21 is moved to the push start position, hydraulic oil is supplied to the hydraulic cylinder 22 and the accumulator 23, but the piston 32 is separately executed. A device for moving the device may be provided and executed by the device.

[Industrial Availability]

The vehicle crash simulation test apparatus and method thereof according to the present invention and the control device for the automobile crash simulation apparatus improve the reproducibility of the automobile crash simulation test by setting the push start position of the piston based on the data obtained in the actual vehicle crash test. It can be applied to any vehicle crash simulation apparatus.

11: sled 15: specimen
21: launch device (sled acceleration device)
22: hydraulic cylinder 23: accumulator
24: servo valve 25: hydraulic source
26 control device (push start position setting means)
27: driving operation device 32: piston
71: position sensor
81: position restraint member (push start position setting means)

Claims (8)

A sled supported to be movable along a horizontal front and rear direction and to which a specimen can be mounted;
A fluid cylinder capable of pushing a piston towards the sled,
An accumulator connected to the rear chamber side of the fluid cylinder,
A servo valve provided at a discharge port formed at the front chamber side of the fluid cylinder;
Push start position setting means for setting the push start position of the piston based on the data obtained in the actual vehicle crash test, characterized in that
Car crash simulation device. The method of claim 1,
The push start position setting means has a control device capable of adjusting the valve opening degree of the servovalve, and the control device is configured to preset the valve opening degree of the servovalve when the piston is in the initial position. When the piston reaches the push start position, the valve opening degree of the servovalve is set to a predetermined predetermined test opening degree.
Car crash simulation device. The method of claim 2,
The control device estimates the time for the piston to reach the push start position based on the hydraulic pressure of the piston and the valve opening degree of the servovalve, and when the piston reaches the push start position, Characterized by setting the test opening degree
Car crash simulation device. The method of claim 2,
The position sensor which detects the push starting position of the said piston is provided, The said control apparatus determines that the said piston reached the push starting position based on the detection result of the said position sensor, and makes the said servovalve open the test opening degree. Characterized in that
Car crash simulation device. The method of claim 1,
The push starting position setting means has a position restraining member that restrains the piston to a push starting position with respect to the fluid cylinder, and the fluid cylinder and the state in a state of restraining the piston at the push starting position by the position restraining member. Supplying fluid to the accumulator
Car crash simulation device. Pressurizes by supplying fluid to the accumulator and the hydraulic cylinder in communication with the accumulator when the piston of the fluid cylinder is in the initial position,
The piston is moved to the push start position by minutely discharging the fluid from the front chamber side of the fluid cylinder,
When the piston reaches the push start position, the piston is pushed toward the sled on which the specimen is mounted by discharging a large amount of fluid from the front chamber side of the fluid cylinder.
Car crash simulation test method. Constrain the piston of the fluid cylinder to a push start position,
Pressurizes by supplying fluid to the accumulator and the hydraulic cylinder in communication with the accumulator when the piston is in the push start position,
By pushing a large amount of fluid from the front chamber side of the fluid cylinder to push the piston towards the sled on which the specimen is mounted
Car crash simulation test method. In the control device for automobile crash simulation apparatus according to claim 1,
A sled supported to be movable along a horizontal front and rear direction and to which a specimen can be mounted;
A fluid cylinder capable of pushing a piston towards the sled,
An accumulator connected to the rear chamber side of the fluid cylinder,
In the vehicle collision simulation test apparatus having a servo valve provided in the discharge port formed on the front chamber side of the fluid cylinder,
Finely opening the valve opening of the servovalve when the piston is in its initial position, and fully opening the valve opening of the servovalve when the piston reaches a preset push start position.
Control device for vehicle collision simulation device.

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