JPH09257635A - Apparatus for measuring load if moving body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform securely and automatically the wind-tunnel experiment forming the second model neat the first model safely, and to make it possible to decrease the man-hours by a large extent without the occurrence of the contact breakdown of the model. SOLUTION: The parts performing the functions as follow are provided. A first model 1 is fixed to the upper part of a wind tunnel 15. A triaxial moving means is arranged at the lower part of the win tunnel 15 and has an attaching arm. A movement control means 4 control the moving means. A second model 2 is attached to the attaching arm 16 of the moving means 4. A force detecting means detects the force applied on the second model 2. A load operating means 8 receiver the output of the detecting means through an amplifier and an A/D converter 7, computes the above described force and sends the stopping signal to the movement control means 4 when the second model 2 comes into contact and the reaction force is larger than the preset value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving object load measuring device for preventing damage due to collision.

[0002]

2. Description of the Related Art In a wind tunnel experiment, for example, when measuring the aerodynamic load of a dropping model, it is very important to measure near the mother model.

In a moving object load measuring device having a moving device to which a measuring object is attached in the prior art, in order to prevent damage due to collision of the measuring object, an operator visually monitors the measuring object, and manually judges that the collision occurs. The moving device was in an emergency stop.

[0004]

The above-mentioned prior art has the following problems.

(1) Collision / damage due to a time delay from the collision judgment of the moving device operator to the stop of the measuring object.

(2) Occurrence of individual differences among operators of moving devices when visually determining collision. And that collision avoidance cannot be performed reliably.

[0007]

The present invention employs the following means to solve the above-mentioned problems.

That is, as a moving object load measuring device,
A first model fixed to the upper part of the wind tunnel, a three-axis moving means having a mounting arm arranged at the lower part of the wind tunnel, a movement control means for controlling the moving means, and a mounting arm for the moving means. The second model, the force detecting means for detecting the force applied to the second model, the amplifier receiving the output of the force detecting means, the A / D converter receiving the output of the amplifier, and the A And a load calculation means for receiving the output of the D / D converter, calculating the force, and sending a stop signal to the movement control means when the reaction force of the second model contacts and the reaction force is equal to or more than a predetermined set value. Set up.

In the above, for example, the second model is a dropped object model dropped from the first model.

The movement control means sends to the movement means a control signal for moving the second model to each position corresponding to the dropping flight path. The moving means moves according to this signal, and moves along the flight path on which the second model is dropped. The force detection means is the second
Of the force applied to the model of the car, the signal is amplified, A / D
It is sent to the load calculation means via the converter. The load calculation means calculates and outputs the aerodynamic load applied to the second model from the input signal corresponding to each position.

In the unlikely event that the second model comes into contact with the first model due to the movement of the moving means, the reaction force acts in the same manner as described above and is calculated by the load calculating means. The load calculation means sends a stop signal to the movement control means when the reaction force exceeds a predetermined set value. The movement control means receives this signal and stops the movement means.

The above set values are set within a range in which the model is not damaged by contact with the model.

As described above, the aerodynamic load can be measured safely and reliably over various routes without damaging the model by contact.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to FIGS.

In FIG. 1, a first model 1 (mother machine model) is arranged above the wind tunnel 15. The moving device 4 is arranged below it.

The moving device 4 is a dolly 11 having a wheel device 10.
A pillar 14 having a left-right moving device 12 is provided on the upper part. Further, a vertical movement device 13 that moves along the pillar 14 is provided. A mounting arm 16 is attached to the front end of the vertical movement device 13, and a second model (for example, a model of a dropped object) 2 is attached to its tip.

A 6-component force balance 3 is mounted in the second model 2, and its output is sent to a load measuring calculator 8 via an amplifier 6 and an A / D converter 7 in sequence.

The output of the moving device control computer 5 is sent to the wheel device 10, the lateral moving device 12, and the vertical moving device 13. The output of the load measuring calculator 8 is sent to the moving device controlling calculator 5.

In the above, when performing the wind tunnel experiment of the second model 2, the moving device control computer 5 sends to the moving device 4 a control signal for moving the second model 2 to each position corresponding to the flight path. send. The moving device 4 moves according to this control signal, and moves the second model 2 along the drop flight path.

The 6-component force balance 3 detects the force applied to the second model 2 and sends the signal to the load measuring computer 8 via the amplifier 6 and the A / D converter 7. The load measurement computer 8 calculates and outputs the aerodynamic load applied to the second model 2 from the input signal corresponding to each position.

If the second model 2 comes into contact with the first model 1 due to the movement of the moving device 4, the reaction force thereof acts in the same manner as described above and is calculated by the load measuring computer 8. The load measurement computer 8 sends a stop signal (emergency stop signal) to the mobile device control computer 5 when the reaction force exceeds a predetermined set value. The mobile device control computer 5 receives the stop signal and causes the mobile devices 10, 12, and 13 to make an emergency stop.

The above set values are set within a range in which the models are not damaged by the contact between the models 1 and 2. The moving device control computer 5 calculates the magnitude of the reaction force together with the rate of increase, and outputs a stop signal when the value exceeds the set value.
A processing flow chart is shown in FIG.

As described above, the aerodynamic load can be measured safely and reliably over various routes without the model 2 coming into contact with and damaging the model 1.

[0024]

As described above, the present invention has the following effects.

(1) A wind tunnel experiment in which the second model is moved near the first model can be automatically performed safely and reliably.

(2) Contact damage to the model does not occur, and the number of steps can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a configuration system diagram of an embodiment of the present invention.

FIG. 2 is a processing flow chart of the same form.

[Explanation of symbols]

 1 mother machine model (first model) 2 force measurement model (second model) 3 6 component balance 4 moving device 5 moving device control computer 6 amplifier 7 A / D converter 8 load measuring computer 10 wheel device 11 Cart 12 Horizontal movement device 13 Vertical movement device 14 Pillar 15 Wind tunnel 16 Mounting arm

Claims (1)

[Claims] 1. A first model fixed to the upper part of the wind tunnel, a three-axis moving type moving means having a mounting arm arranged at the lower part of the wind tunnel, a movement control means for controlling the moving means, and the moving means. A second model attached to the mounting arm of
The force detecting means for detecting the force applied to the second model, the amplifier receiving the output of the detecting means, the A / D converter receiving the output of the amplifier, and the output of the A / D converter are described above. A moving object comprising: a force calculation means for calculating a force and sending a stop signal to the movement control means when the reaction force of the second model comes into contact with the second model and is equal to or more than a predetermined set value. Load measuring device.