Device for measuring action force of wheel and device for measuring stress of structure
AssigneeJapan Electronics Industry, Limited
InventorNagao Miyazaki
Life of this patent
Estimating the term…
Abstract
Action force of a wheel is measured in order to measure the road surface frictional force, vertical drag, road surface friction coefficient, etc. Means for making these measurements can be constituents of an antilock brake system, traction control system, etc. These constituents may also serve as devices for measuring stresses generated in other structures. In a specific example, axle of a vehicle is formed with a hole, a stress detection sensor is installed in the hole and secured in position with the aid of a spacer element, and a detection signal from the stress detection sensor is processed in a signal processing circuit.
Claims17
A device for measuring action force of a wheel comprising:
- a vehicle axle is formed with a hole therein;
- a stress detection sensor is installed in said hole and secured therein through contact between lateral sides of said sensor and an inner surface of said hole;
- said stress detection sensor being an integral unit comprising strain gauges mounted on a cubic plastic base;
- and
- a signal processing circuit for processing a detection signal from said stress detection sensor.
A device for measuring action force of a wheel comprising:
- a vehicle axle is formed with holes therein;
- a stress detection sensor installed in each of said holes and secured therein through contact between lateral sides of said sensor and an inner surface of a respective one of said holes;
- and
- a signal processing circuit for processing a detection signal from each stress sensor to extract a given strain.
A device for measuring action force of a wheel comprising:
- a vehicle axle with holes extending in horizontal and vertical directions, respectively;
- a stress detection sensor is installed in each of the holes and secured therein through contact between lateral sides of said stress detection sensor and an inner surface of a respective one of said holes;
- and
- a signal processing circuit for processing a detection signal from said stress detection sensor in each of said holes to extract a road surface friction coefficient.
The device for measuring action force of a wheel comprising:
- a vehicle axle is formed with a hole therein;
- a stress detection sensor is installed in said hole and secured therein through contact between lateral sides of said sensor and an inner surface of said hole;
- said stress detection sensor being an integral unit comprising a bar-shaped structure having a planar part at one end thereof and said strain gauges being mounted on said planar part;
- and
- a signal processing circuit for processing a detection signal from said stress detection sensor.
The device for measuring action force of a wheel comprising:
- a vehicle axle is formed with a hole therein;
- a stress detection sensor is installed in said hole and secured therein through contact between lateral sides of said sensor and an inner surface of said hole;
- said stress detection sensor being an integral unit comprising a ceramic substrate and strain gauges mounted on said ceramic substrate and coated with an oxide film;
- and
- a signal processing circuit for processing a detection signal from said stress detection sensor.
The device for measuring action force of a wheel comprising:
- a vehicle axle is formed with a hole therein;
- a stress detection sensor is installed in said hole and secured therein through contact between lateral sides of said sensor and an inner surface of said hole;
- the stress detection sensor including strain gauges and said strain gauges of the stress detection sensor are installed and secured in said hole in the vehicle axle oriented at an angle of about 45.degree. with respect to horizontal and vertical stress center axes of the vehicle axle;
- and
- a signal processing circuit for processing a detection signal from said stress detection sensor.
A device for measuring action force of a wheel comprising:
- a vehicle axle is formed with a hole therein;
- a main stress detection sensor installed in said hole;
- an auxiliary stress detection sensor for detecting a source of strain installed in said hole proximate said main stress detection sensor;
- said auxiliary stress detection sensor and said main stress detection sensor operating to produce corresponding stress detection signals;
- and
- a signal processing circuit for processing the corresponding stress detection signals to produce an output signal wherein a strain signal corresponding to the source of strain is one of reduced and eliminated.
Dependencies are inferred from the claim text.