Impact test hammer

Details Impact test hammer Impact test hammer

1990-04-10

1991-06-25

Watts, Douglas D.

Measuring and testing

Testing of shock absorbing device

In situ vehicle suspension

173 12, G01N 330

Patent

active

050256556

ABSTRACT:
An impact test hammer includes a cylindrical handle having opposite first and second end portions and a hollow interior, a sensor portion fixed to the first end portion of the handle, and a grip portion fixed to the second end portion of the handle. An elastic striking portion is fixed to an outer periphery of the sensor storage portion, and an impact acceleration sensor is housed within the sensor storage portion for sensing a striking power of the elastic striking portion applied to a test object. A circuit is housed within the grip portion and operatively connected to the sensor by way of wiring extending through the hollow interior of the handle. Such a circuit includes a range switch, a scale conversion amplifier and a wind amplifier. A knob is provided on the outer periphery of the grip portion for operating the range switch to set a degree of amplification of the amplifier. The amplifier receives a signal from the sensor and amplifies the signal according to the amplification degree set by the range switch. The wind comparator outputs an indicator actuation signal when the output from the amplifier falls within a specified range which is determined based on the characteristics of the test object.

REFERENCES:
patent: 3435658 (1969-04-01), Arthur
patent: 3538743 (1970-11-01), Glidden
patent: 4399685 (1983-08-01), Atkey
patent: 4422320 (1983-12-01), Moorby et al.
patent: 4615209 (1986-10-01), Change, Jr.
patent: 4689985 (1987-09-01), Glass, III
patent: 4799375 (1989-01-01), Lally
patent: 4856318 (1989-08-01), Hogan et al.

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