公开(公告)号：JP2001183250A

公开(公告)日：2001-07-06

申请号：JP36689799

申请日：1999-12-24

Applicant: NAT AEROSPACE LAB

Inventor： UEDA TETSUHIKO ,  SOTOZAKI TOKUO ,  KAI TAKASHI

IPC: G01L5/00 ,  B60T8/172 ,  G01N19/02

Abstract: PROBLEM TO BE SOLVED: To provide a road surface friction measuring device capable of being easily mounted on a general automobile and measuring coefficients of friction of various road surfaces such as a road, a runway or the like with high accuracy. SOLUTION: This device has a spindle 5 removably connected to a wheel of a driving wheel 3 of an automobile, an oscillatable supporting arm 6 connected to the spindle, and a measuring ring rotatably supported by the supporting arm. The supporting arm 6 is provided with a vertical drag generating mechanism generating the vertical drag to be added to the self-weight of the measuring ring 8, a first detecting means for detecting the vertical drag received by the measuring ring from a road surface, a rotation transmitting mechanism for transmitting the rotation of the spindle to the measuring ring for producing the difference in peripheral speeds between the driving wheel and the measuring ring, and a second detecting means for detecting the rotational resistance received by the driving wheel from the road surface, and a coefficient of friction of the road surface is calculated by an operating means on the basis of detected values of these detecting means, and the self-weight of the measurer including the arm.

公开(公告)号：JPH09145533A

公开(公告)日：1997-06-06

申请号：JP31071095

申请日：1995-11-29

Applicant: NAT AEROSPACE LAB ,  MITSUBISHI HEAVY IND LTD

Inventor： UEDA TETSUHIKO ,  ARAKAWA MASAO ,  NAGAHATA MASASHI ,  KAWAMURA MASAKO

IPC: G01M9/00 ,  G01M9/08

Abstract: PROBLEM TO BE SOLVED: To perform an aerodynamic vibration test where the vibration characteristics are simulated while coupling a winged airplane and a rocket by supporting a machine body simulating a winged airplane, i.e., a rocket model simulating the shape of a rocket for mounting a winged airplane at the forward end thereof, at a predetermined position in a wind tunnel. SOLUTION: A machine body model 1 is set in a wind tunnel while being coupled with a sting 3 simulating the rocket body through a coupling part simulating the nose of rocket. A spring 7 simulating the coupling rigidity of a winged airplane and rocket is built in the sting 3. The machine body model 1 is secured, at the rear end thereof, to a supporting metal 4 and coupled in the sting 3 while being blocked by means of a central rotary shaft 6 disposed in the inner tube 5 of sting 3 and allowed only pitch rotation. Since such a structure is employed, aerodynamic force simulating the air flow being effected by the rocked acts on the machine body model 1 and the machine body model 1 can vibrate rotationally with micro amplitude.